研究業績 Publications

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研究業績 - 原著論文

Controlling Aluminum Siting in Low-Silica Zeolite Frameworks: A Post-Synthetic Approach Exemplified by MAZ-type Topology

Yuto Yoshida, Kota Yamashita, Koki Muraoka, Masahito Hasumi, Ryota Osuga, Yutaka Yanaba, Kiyotaka Nakajima, Akira Nakayama, Toru Wakihara, Tatsuya Okubo, Kenta Iyoki

Chemistry of Materials, in press
Exploring the Improvement of NOx Conversion and N2 Selectivity by Tandem Layer Cu/Fe–Zeolite Catalysts for NH3–SCR

Jingyun Yu, Raquel Simancas, Shanmugam P. Elangovan, Haruko Fujinuma, Kenta Iyoki, Tatsuya Okubo, Toru Wakihara

ChemCatChem, e01185, 2025
Drawing boundaries between feasible and unfeasible zeolite intergrowths using high-throughput computational screening with synthesis validation

Kota Oishi, Koki Muraoka, Satoko Toyama, Takeshi Iwata, Takehito Seki, Naoya Shibata, Kenta Iyoki, Toru Wakihara, Tatsuya Okubo, Akira Nakayama

Nature Materials, 2025, doi:10.1038/s41563-025-02377-6
Capture of Low-concentration Carbon Dioxide with Ultrafast-synthesized MOR-type Zeolites as Adsorbents

Duanxing Li, Xiaofei Lu, Anand Chokkalingam, Kenta Iyoki

ChemRxiv. 2025, doi:10.26434/chemrxiv-2025-mqhbd
Antiviral potential of proton-type zeolite

Yuka Kimura, Masanori Takemoto, Noriko Nakamura, Takeshi Ichinohe, Makoto Nakakido, Kenta Iyoki, Seiichi Ohta, Nobuhiro Miyamae, Yuki Egami, Koichi Sato, Tatsuya Okubo, Kouhei Tsumoto, Toru Wakihara

PLoS One, 20, e0324484, 2025
Preparation of translucent silicalite-1 bulk ceramics by spark plasma sintering

Masanori Takemoto, Yoshiaki Ito, Yuka Yoshihara, Shiori Odagiri, Yuta Shuseki, Kenta Iyoki, Tatsuya Okubo, Atsunobu Masuno, Toru Wakihara

Materials Advances, 6, 3132, 2025
Photocatalytic evolution of nitrous oxide from nitric monoxide over Pt-loaded titanium dioxide under UV irradiation

Ryo Asayama, Masanori Takemoto, Arata Suzuki, Ryuichi Watanabe, Fuminao Kishimoto, Kenta Iyoki, Tatsuya Okubo, and Toru Wakihara

Reaction Chemistry & Engineering, in press
Achieving extreme thermal stability of high-silica FAU through trace water-assisted steam treatment

Boqing Li, Raquel Simancas, Kenta Iyoki, Shanmugam P. Elangovan, Takahiro Ohkubo, Tatsuya Okubo, and Toru Wakihara

Chemical Communications, 61, 6599, 2025
Development of zeolite adsorbent with low water sensitivity for CO2 capture

Peidong Hu, Ryusei Oishi, Hanlong Ya, Yasuo Yonezawa, Minoru Matsukura, Kenta Iyoki, Tatsuya Okubo, Toru Wakihara

Chemical Engineering Journal, 508, 161054, 2025
Adsorption behavior of low-concentration nitrous oxide on natural mordenite zeolite

Saeko Yamaguchi, Peidong Hu, Hanlong Ya, Peipei Xiao, Ayako Nakata, Tsuyoshi Miyazaki, Yoshitada Morikawa, Junko N. Kondo, Kotaro Tange, Kenichi Tonokura, Masanori Takemoto, Yasuo Yonezawa, Toshiyuki Yokoi, Kenta Iyoki, Tatsuya Okubo, Toru Wakihara

Microporous and Mesoporous Materials, 388, 113550, 2025
Liquid-Mediated Treatment for Silanol Defects Healing and Sn Coordination Optimization in Sn-Beta for Improved Catalytic Activity

Boqing Li, Raquel Simancas, Hiroki Nagashima, Kenta Iyoki, Shanmugam P. Elangovan, Anand Chokkalingam, Takayuki Yamagishi, Satoshi Inagaki, Tatsuya Okubo, and Toru Wakihara

ChemCatChem, e202401937, 2025
Removal of Radioactive Noble Gas Radon from Air by Ag-Zeolite

Hiroshi Ogawa, Yasuo Takeuchi, Hiroyuki Sekiya, Kenta Iyoki, Minoru Matsukura, Toru Wakihara, Yuuki Nakano, Shigeru Hirano, Akio Taniguchi

Progress of Theoretical and Experimental Physics, 023H04, 2025
Superior low temperature activity over α-MnO₂/β-MnOOH catalyst for selective catalytic reduction of NO_x with ammonia

Masanori Takemoto, Haruko Fujinuma, Yoshihiro Sugawara, Yukichi Sasaki, Kenta Iyoki, Tatsuya Okubo, Kazuya Yamaguchi, and Toru Wakihara

RSC Advances, 14, 35498, 2024
Simultaneous Control of Aluminum Atoms and Defects in MOR Zeolite Framework by Post-Synthetic Treatments

Yuki Fujikawa, Tatsushi Yoshioka, Kenta Iyoki, Takahiro Ohkubo, Tatsuya Okubo, Toru Wakihara

The Journal of Physical Chemistry C, 128, 9331, 2024
Effect of defect-healing treatment on layered silicate precursors toward well-defined crosslinked frameworks

Yoshiaki Ito, Keiichiro Nayuki, Yukichi Sasaki, Toru Wakihara, Tatsuya Okubo, and Kenta Iyoki

RSC Advances, 14, 12634, 2024
Improving mechanical stability of ZSM-5 zeolite by defect-healing treatment

Masanori Takemoto, Yuka Yoshihara, Yoshiaki Ito, Hiroki Yamada, Kenta Iyoki, Tatsuya Okubo, Toru Wakihara

Microporous and Mesoporous Materials, 372, 113087, 2024
Measurement of radon emanation and impurity adsorption from argon gas using ultralow radioactive zeolite

Hiroshi Ogawa, Kenta Iyoki, Minoru Matsukura, Toru Wakihara, Ko Abe, Kentaro Miuchi, Saori Umehara

Journal of Instrumentation, 19, P02004, 2024
Unexpected Low Temperature Activity with Low N₂O Emission of Stabilized Al-rich Zeolite Beta for Selective Catalytic Reduction of NO_x

Jingyun Yu, Kenta Iyoki, Shanmugam P. Elangovan, Haruko Fujinuma, Tatsuya Okubo, Toru Wakihara

Chemistry - A European Journal, 30, e2023031, 2024
Dealumination of RHO zeolite by acid treatment and recrystallization with organic pore filler

Tatsushi Yoshioka, Kenta Iyoki, Yutaka Yanaba, Tatsuya Okubo, Toru Wakihara

Journal of the Ceramic Society of Japan, 132, 45, 2024
Selective Hydrogenation of Carbon Dioxide to Light Hydrocarbons over ZnZrO_x/HMFI Composite Catalyst with Long-term Stability

Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura

Applied Catalysis A, General, 669, 119517, 2024
Hydrophobicity Manipulation of Titanium-silicalite-1 with Enhanced Catalytic Performance via Liquid-mediated Defect-healing Treatment

Boqing Li, Kenta Iyoki, Piyapatch Techasarintr, Shanmugam Elangovan, Raquel Simancas, Tatsuya Okubo, Toshiyuki Yokoi, Toru Wakihara

ACS Catalysis, 13, 15155, 2023
Drastic Photoemission Color Alternation from a Single Molecule as a Starting Material Introduced in Acid-Treated Zeolites: From Pure Blue to White

Fuminao Kishimoto, Kyohei Hisano, Tatsushi Yoshioka, Kenta Iyoki, Toru Wakihara, and Tatsuya Okubo

ACS Applied Materials & Interfaces, 15, 49500, 2023
Postsynthetically Tailoring Acid Properties and Pore Structures of ZnZrO_x/MFI Catalysts for One-Pass CO₂ Hydrogenation

Duanxing Li, Xiaofei Lu, Hiroka Kinoshita, Masanori Takemoto, Anand Chokkalingam, Shohei Tada, and Kenta Iyoki

ACS Engineering Au, 3, 316, 2023
Optimal mixing method of ZnZrO_x and MOR-type zeolite to prepare a bifunctional catalyst for CO₂ hydrogenation to lower olefins

Shohei Tada, Hiroka Kinoshita, Duanxing Li, Masahiko Nishijima, Harune Yamaguchi, Ryuji Kikcuhi, Noriko Yamauchi, Yoshio Kobayashi, Kenta Iyoki

Advanced Powder Technology, 34, 104174, 2023
Precise tuning of the properties of MOR-type zeolite nanoparticles to improve lower olefins selectivity in composite catalysts for CO₂ hydrogenation

Ryusei Oishi, Duanxing Li, Mina Okazaki, Hiroka Kinoshita, Nagomu Ochiai, Noriko Yamauchi, Yoshio Kobayashi, Toru Wakihara, Tatsuya Okubo, Shohei Tada, Kenta Iyoki

Journal of CO2 Utilization, 72, 102491, 2023
Atom-Selective Analyses Reveal the Structure-Directing Effect of Cs Cation on the Synthesis of Zeolites

Hiroki Yamada, Hirofumi Horikawa, Chokkalingam Anand, Koji Ohara, Toshiaki Ina, Akihiko Machida, Satoshi Tominaka, Tatsuya Okubo, Zhendong Liu, Kenta Iyoki, and Toru Wakihara

The Journal of Physical Chemistry Letters, 14, 14, 3574–3580, 2023
Control of Competitive Structure-Directing Effect in CON-Type Zeolite Synthesis via Intermediate Addition Method

Takumi Shibuya, Kenta Iyoki, Hiroaki Onozuka, Masanori Takemoto, Susumu Tsutsuminai, Takahiko Takewaki, Toru Wakihara, and Tatsuya Okubo

Crystal Growth & Design, 23, 3509−3517, 2023
Synthesis and thermal stability of SOD-type SAPO-20 via interzeolite conversion of FAU-type SAPO-37 using tetramethylammonium hydroxide and piperidine

Masanori Takemoto, Yuki Fujikawa, Kenta Iyoki, Nao Tsunoji, Tsuneji Sano, Tatsuya Okubo and Toru Wakihara

Journal of the Ceramic Society of Japan, 131, 94-99, 2023
Amorphous aluminosilicates as efficient ion exchangers for ammonium cation removal from aqueous solutions

Raquel Simancas, Masamori Takemura, Ching-Tien Chen, Kenta Iyoki, Tatsuya. Okubo Toru Wakihara

Journal of Non-Crystalline Solids, 605, 122172, 2023
Biased Al distribution of high-silica FAU-type zeolite synthesized by fast manner at high temperature

Yuki Sada, Shoko Miyagi, Kenta Iyoki, Masato Yoshioka, Tomoya Ishikawa, Yusuke Naraki, Tsuneji Sano, Tatsuya Okubo, Toru Wakihara

Microporous and Mesoporous Materials, 344, 112196, 2022
OSDA-free synthesis of zeolite beta: Broadening the methodology for a successful use of the product as a seed

Junki Tomita, Shanmugam P. Elangovan, Keiji Itabashi, Anand Chokkalingam, Haruko Fujinuma, Zhigang Hao, Akihiro Kanno, Katsuhiko Hayashi, Kenta Iyoki, Toru Wakihara, Tatsuya Okubo

Advanced Powder Technology, 33, 103741, 2022
Ultrafast dealumination of *BEA zeolite using a continuous-flow reactor

Ayano Minami, Masanori Takemoto, Yasuo Yonezawa, Zhendong Liu, Yutaka Yanaba, Anand Chokkalingam, Kenta Iyoki, Tsuneji Sano, Tatsuya Okubo, Toru Wakihara

Advanced Powder Technology, 33, 103702, 2022
Influence of Si/Al ratio of MOR type zeolites for bifunctional catalysts specific to the one-pass synthesis of lower olefins via CO₂ hydrogenation

Shohei Tada, Duanxing Li, Mina Okazaki, Hiroka Kinoshita, Masahiko Nishijima, Noriko Yamauchi, Yoshio Kobayashi, Kenta Iyoki

Catalysis Today, 411-412, 113828, 2023
Dealumination of small-pore zeolites through pore-opening migration process with the aid of pore-filler stabilization

Tatsushi Yoshioka, Kenta Iyoki, Yuusuke Hotta, Yoshihiro Kamimura, Hiroki Yamada, Qiao Han, Takeharu Kato, Craig A. J. Fisher, Zhendong Liu, Ryohji Ohnishi, Yutaka Yanaba, Koji Ohara, Yukichi Sasaki, Akira Endo, Takahiko Takewaki, Tsuneji Sano, Tatsuya Okubo, Toru Wakihara

Science Advances, 8, eabo3093, 2022
Active Sites on Zn_xZr_1–xO_2–x Solid Solution Catalysts for CO₂-to-Methanol Hydrogenation

Shohei Tada, Nagomu Ochiai, Hiroka Kinoshita, Mitsuhiro Yoshida, Natsumi Shimada, Tatsuya Joutsuka, Masahiko Nishijima, Tetsuo Honma, Noriko Yamauchi, Yoshio Kobayashi, and Kenta Iyoki

ACS Catalysis, 12,7748−7759, 2022
Robust CON-type zeolite nanocatalyst in methanol-to-olefins reaction: downsizing, recrystallisation and defect-healing treatments toward prolonged lifetime

Masanori Takemoto, Kenta Iyoki, Yuki Otsuka, Hiroaki Onozuka, Anand Chokkalingam, Toshiyuki Yokoi, Susumu Tsutsuminai, Takahiko Takewaki, Toru Wakahira and Tatsuya Okubo

Materials Advances, 3, 5442, 2022
Exploring hydrothermal synthesis of SAPO-18 under high hydrostatic pressure

Raquel Simancas, Masamori Takemura, Yasuo Yonezawa, Sohei Sukenaga, Mariko Ando, Hiroyuki Shibata, Anand Chokkalingam, Kenta Iyoki, Tatsuya Okubo, and Toru Wakihara

Nanomaterials, 12, 396-407, 2022
Broadening Synthetic Scope of SSZ-39 Zeolite: A Fast and Direct Route from Amorphous Starting Materials

Peidong Hu, Kenta Iyoki, Haruko Fujinuma, Jingyun Yu, Sijing Yu, Chokkalingam Anand, Yutaka Yanaba, Tatsuya Okubo, and Toru Wakihara

Microporous and Mesoporous Materials, 330, 111583, 2022
Reduction of Crystal Size of Silicalite-1 Synthesized in Fluoride-Containing Media via Multi-Stage Heating with Intermediate Stirring

Kenta Iyoki, Takako Onishi, Mariko Ando, Sohei Sukenaga, Hiroyuki Shibata Tatsuya Okubo, and Toru Wakihara

Journal of the Ceramic Society of Japan, 130, 187–194, 2022
Search for solid acid catalysts aiming at the development of bifunctional tandem catalysts for the one-pass synthesis of lower olefins via CO₂ hydrogenation

Shohei Tada, Hiroka Kinoshita, Nagomu Ochiai, Anand Chokkalingam, Peidong Hu, Noriko Yamauchi, Yoshio Kobayashi, Kenta Iyoki

International Journal of Hydrogen Energy, 2021
Reaction Kinetics-Regulated Formation of Short-Range Order in an Amorphous Matrix During Zeolite Crystallization

Ching-Tien Chen, Kenta Iyoki, Peidong Hu, Hiroki Yamada, Koji Ohara, Sohei Sukenaga, Mariko Ando, Hiroyuki Shibata, Tatsuya Okubo, Toru Wakihara

Journal of the American Chemical Society, 143, 10986−10997, 2021
Tracking the crystallization behavior of high-silica FAU during AEI-type zeolite synthesis using acid treated FAU-type zeolite

Yuki Sada, Anand Chokkalingam, Kenta Iyoki, Masato Yoshioka, Tomoya Ishikawa, Yusuke Naraki, Yutaka Yanaba, Hiroki Yamada, Koji Ohara, Tsuneji Sano, Tatsuya Okubo, Zhendong Liu, Toru Wakihara

RSC Advances, 11, 23082–23089, 2021
Synthetic and natural MOR zeolites as high-capacity adsorbents for the removal of nitrous oxide

Keita Yamashita, Zhendong Liu, Kenta Iyoki, Ching-Tien Chen, Shoko Miyagi, Yutaka Yanaba, Yusuke Yamauchi, Tatsuya Okubo, and Toru Wakihara

Chemical Communications, 57, 1312, 2021
Influence of reaction temperature on CO₂-to-methanol hydrogenation over MZrO_x (M = Al, Mn, Cu, Zn, Ga, and In)

Shohei Tada and Kenta Iyoki

Chemistry Letters, 50, 724, 2021
Optimized ultrafast flow synthesis of CON-type zeolite and improvement of its catalytic properties

Anand Chokkalingam, Kenta Iyoki, Naoki Hoshikawa, Hiroaki Onozuka, Watcharop Chaikittisilp, Susumu Tsutsuminai, Takahiko Takewaki, Toru Wakihara, and Tatsuya Okubo

Reaction Chemistry & Engineering, 5, 2260, 2020
Ultrafast and continuous-flow synthesis of AFX zeolite via interzeolite conversion of FAU zeolite

Tatsushi Yoshioka, Zhendong Liu, Kenta Iyoki, Anand Chokkalingam, Yasuo Yonezawa, Yuusuke Hotta, Ryohji Ohnishi, Takeshi Matsuo, Yutaka Yanaba, Koji Ohara, Takahiko Takewaki, Tsuneji Sano, Tatsuya Okubo, and Toru Wakihara

Reaction Chemistry & Engineering, 6, 74, 2021
Toward Efficient Synthesis of Chiral Zeolites: A Rational Strategy for Fluoride-Free Synthesis of STW-Type Zeolite

Yuki Shinno, Kenta Iyoki, Koji Ohara, Yutaka Yanaba, Yusuke Naraki, Tatsuya Okubo, Toru Wakihara

Angewandte Chemie International Edition, 59, 20099–20103, 2020
Comparative Study of Direct Methylation of Benzene with Methane on Cobalt-exchanged ZSM-5 and ZSM-11 Zeolites

Peidong Hu, Koshiro Nakamura, Hitoshi Matsubara, Kenta Iyoki, Yutaka Yanaba, Kazu Okumura, Tatsuya Okubo, Naonobu Katada, Toru Wakihara

Applied Catalysis A: General, 601, 117661, 2020
Rapid Synthesis of Hydrothermally Stable ZSM-5 in the Presence of 1-butanol

Tatsushi Yoshioka, Zhendong Liu, Kenta Iyoki, Tsuneji Sano, Mariko Ando, Sohei Sukenaga, Hiroyuki Shibata, Tatsuya Okubo, Toru Wakihara

Chemistry Letters, 49, 1006, 2020
Superior Ion-exchange Property of Amorphous Aluminosilicates Prepared by a Co-precipitation Method

Naomichi Hikichi, Kenta Iyoki, Yutaka Yanaba, Koji Ohara, Tatsuya Okubo, Toru Wakihara

Chemistry An Asian Journal, 15, 2029, 2020
Understanding the Nucleation and Crystal Growth of Zeolites: A Case Study on the Crystallization of ZSM‑5 from a Hydrogel System Under Ultrasonication

Ching-Tien Chen, Kenta Iyoki, Yasuo Yonezawa, Tatsuya Okubo, Toru Wakihara

The Journal of Physical Chemistry C, 124, 11516, 2020
Extremely Stable Zeolites Developed via Designed Liquid-Mediated Treatment

Kenta Iyoki, Kakeru Kikumasa, Takako Onishi, Yasuo Yonezawa, Anand Chokkalingam, Yutaka Yanaba, Taiji Matsumoto, Ryota Osuga, Shanmugam P. Elangovan, Junko N. Kondo, Akira Endo, Tatsuya Okubo, Toru Wakihara

Journal of the American Chemical Society, 142, 3931, 2020.
Incorporation of Si into Iron Oxide-based Microporous Zeolitic Framework for Improving Thermal Stability and Changing Guest Species

Yuki Shinno, Kenta Iyoki, Tatsuya Okubo

Chemistry Letters, 48, 1217, 2019
Crucial Factors for Seed-Directed Synthesis of CON-type Aluminoborosilicate Zeolites Using Tetraethylammonium

Sibel Sogukkanli, Koki Muraoka, Kenta Iyoki, Shanmugam P. Elangovan, Yutaka Yanaba, Watcharop Chaikittisilp, Toru Wakihara, Tatsuya Okubo

Crystal Growth & Design, 19, 5283, 2019.
Zeolite Crystallization Triggered by Intermediate Stirring

Ching-Tien Chen, Kenta Iyoki, Hiroki Yamada, Sohei Sukenaga, Mariko Ando, Hiroyuki Shibata, Koji Ohara, Toru Wakihara, Tatsuya Okubo

Journal of Physical Chemistry C, 123, 20304, 2019
Synthesis and characterization of MFI-type zincosilicate zeolites with high zinc content using mechanochemically treated Si–Zn oxide composite

Peidong Hu, Kenta Iyoki, Hiroki Yamada, Yutaka Yanaba, Koji, Ohara, Naonobu Katada, and Toru Wakihara

Microporous and Mesoporous Materials, 288, 109594, 2019
Ultrafast synthesis of AFX-Type zeolite with enhanced activity in the selective catalytic reduction of NO_x and hydrothermal stability

Anand Chokkalingam, Watcharop Chaikittisilp, Kenta Iyoki, Sye Hoe Keoh, Yutaka Yanaba, Takeshi Yoshikawa, Tetsuro Kusamoto, Tatsuya Okubo, and Toru Wakihara

RSC Advances, 9, 16790, 2019
Role of sodium cation during aging process in the synthesis of LEV-type zeolite

Naomichi Hikichi, Kenta Iyoki, Yusuke Naraki, Yutaka Yanaba, Koji Ohara, Tatsuya Okubo, and Toru Wakihara

Microporous and Mesoporous Materials, 284, 82, 2019
Insights into the ion-exchange properties of Zn(II)-incorporated MOR zeolites for the capture of multivalent cations

Bangda Wang, Natsume Koike, Kenta Iyoki, Watcharop Chaikittisilp, Yi Wang, Toru Wakihara and Tatsuya Okubo

Physical Chemistry Chemical Physics, 21, 4015, 2019
Increasing the ion-exchange capacity of MFI zeolites by introducing Zn to the aluminosilicate frameworks

Natsume Koike, Kenta Iyoki, Bangda Wang, Yutaka Yanaba, Shanmugam Palani Elangovan, Keiji Itabashi, Watcharop Chaikittisilp, and Tatsuya Okubo

Dalton Transactions, 47, 9594, 2018
Synthesis of Microporous Zincosilicate *BEA Molecular Sieves from Zincosilicate Gels Co-precipitated in the Presence of an Organic Structure-Directing Agent

Natsume Koike, Kenta Iyoki, Watcharop Chaikittisilp, Tatsuya Okubo

Chemistry Letters, 47, 897, 2018
Temperature-controlled, two-stage synthesis of ZSM-5 zeolite nanoparticles with Al atoms tetrahedrally coordinated in the framework

Makiko Deguchi, Kenta Iyoki, Chokkalingam Anand, Yutaka Yanaba, Takeshi Yoshikawa, Tatsuya Okubo, Toru Wakihara

Microporous and Mesoporous Materials, 270, 200, 2018
Formation of a dense non-crystalline layer on the surface of zeolite Y crystals under high-temperature steaming conditions

Kenta Iyoki, Yudai Yamaguchi, Akira Endo, Yasuo Yonezawa, Tadashi Umeda, Hiroki Yamada, Yutaka Yanaba, Takeshi Yoshikawa, Koji Ohara, Kaname Yoshida, Yukichi Sasaki, Tatsuya Okubo, Toru Wakihara

Microporous and Mesoporous Materials, 268, 77, 2018
Synthesis of New Microporous Zincosilicates with CHA Zeolite Topology as Efficient Platforms for Ion-Exchange of Divalent Cations

Natsume Koike, Kenta Iyoki, Sye Hoe Keoh, Watcharop Chaikittisilp, Tatsuya Okubo

Chemistry A European Journal, 24, 808, 2018
Seed-directed synthesis of zincoaluminosilicate MSE-type zeolites using co-precipitated gels with tetraethylammonium hydroxide as a simple organic structure directing agent

Sibel Sogukkanli, Kenta Iyoki, Shanmugam P. Elangovan, Keiji Itabashi, Natsume Koike, Miku Takano, Yoshihiro Kubota, Tatsuya Okubo

Microporous and Mesoporous Materials, 257, 272, 2018
Seed-directed Synthesis of CON-type Zeolite Using Tetraethylammonium Hydroxide as a Simple Organic Structure-directing Agent

Sibel Sogukkanli, Kenta Iyoki, Shanmugam Palani Elangovan, Keiji Itabashi and Tatsuya Okubo

Chemistry Letters, 46, 1419, 2017
Organic-free synthesis of zincoaluminosilicate zeolites from homogeneous gels prepared by a co-precipitation method

Natsume Koike, Watcharop Chaikittisilp, Kenta Iyoki, Yutaka Yanaba, Takeshi Yoshikawa, Shanmugam Palani Elangovan, Keiji Itabashi and Tatsuya Okubo

Dalton Transactions, 46, 10837, 2017
Ultrafast synthesis of high-silica erionite zeolites with improved hydrothermal stability

Jie Zhu, Zhendong Liu, Kenta Iyoki, Chokkalingam Anand, Kaname Yoshida, Yukichi Sasaki, Sohei Sukenaga, Mariko Ando, Hiroyuki Shibata, Tatsuya Okubo and Toru Wakihara

Chemical Communications, 53, 6796, 2017
Rational seed-directed synthesis of MSE-type zeolites using a simple organic structure-directing agent by extending the composite building unit hypothesis

Sibel Sogukkanli, Kenta Iyoki, Shanmugam P. Elangovan, Keiji Itabashi, Miku Takano, Zhendong Liu, Satoshi Inagaki, Toru Wakihara, Yoshihiro Kubota, Tatsuya Okubo

Microporous and Mesoporous Materials, 245, 1, 2017
マニアの社交場「BAP cafe」～“狭く深いサイエンスカフェ”の魅力～

菊池結貴子，江崎和音，中島悠，石川遼子，伊與木健太，正田亜八香，音野瑛俊

科学技術コミュニケーション，20, 3, 2017
Catalytic Oxidation of Methane into Methanol over Copper-Exchanged Zeolites with Oxygen at Low Temperature

Karthik Narsimhan, Kenta Iyoki, Kimberly Dinh, and Yuriy Román-Leshkov

ACS Central Science, 6, 424, 2016
Organic structure-directing agent-free synthesis of NES-type zeolites using EU-1 seed crystals

Kenta Iyoki, Masafumi Takase, Keiji Itabashi, Koki Muraoka, Watcharop Chaikittisilp, and Tatsuya Okubo

Microporous and Mesoporous Materials, 215, 191, 2015
Broadening the Applicable Scope of Seed-Directed, Organic Structure-Directing Agent-Free Synthesis of Zeolite to Zincosilicate Components: A Case of VET-Type Zincosilicate Zeolites

Kenta Iyoki, Keiji Itabashi, Watcharop Chaikittisilp, Shanmugam P. Elangovan, Toru Wakihara, Shinji Kohara, and Tatsuya Okubo

Chemistry of Materials, 26, 1957, 2014
Seed-Directed, Rapid Synthesis of MAZ-Type Zeolites without Using Organic Structure-Directing Agent

Akari Ogawa, Kenta Iyoki, Yoshihiro Kamimura, Shanmugam Palani Elangovan, Keiji Itabashi, and Tatsuya Okubo

Microporous and Mesoporous Materials, 186, 21, 2014
Synthesis of pure-silica ZSM-48 zeolite under mild hydrothermal condition with conventional amphiphilic cation by tuning the reactant gel composition

Takahiko Moteki, Sye Hoe Keoh, Takafumi Ohmura, Kenta Iyoki, Toru Wakihara, and Tatsuya Okubo

Journal of the Ceramic Society of Japan, 121, 575, 2013
Seed-assisted, One-pot Synthesis of Hollow Zeolite Beta without the Use of Organic Structure-Directing Agents

Kenta Iyoki, Keiji Itabashi, and Tatsuya Okubo

Chemistry An Asian Journal, 8, 1419, 2013
Facile Synthesis of Well-dispersed Hollow Mesoporous Silica Nanoparticles Using Iron Oxide Nanoparticles as Template

Takaaki Ikuno, Atsuro Nomura, Kenta Iyoki, Ayae Sugawara-Narutaki, Tatsuya Okubo, and Atsushi Shimojima

Chemistry Letters, 42, 316, 2013
Diol-Linked Microporous Networks of Cubic Siloxane Cages

Yuko Wada, Kenta Iyoki, Ayae Sugawara-Narutaki, Tatsuya Okubo, and Atsushi Shimojima

Chemistry A European Journal, 19, 1700, 2013
Hierarchical porous silica via solid-phase hydrolysis/polycondensation of cubic siloxane-based molecular units

Kenta Iyoki, Ayae Sugawara-Narutaki, Atsushi Shimojima, and Tatsuya Okubo

Journal of Materials Chemistry A, 1, 671, 2013
A Working Hypothesis for Broadening Framework Types of Zeolites in Seed-Assisted Synthesis without Organic Structure-Directing Agent

Keiji Itabashi, Yoshihiro Kamimura, Kenta Iyoki, Atsushi Shimojima, and Tatsuya Okubo

Journal of the American Chemical Society, 134, 11542, 2012
OSDA-free synthesis of MTW-type zeolite from sodium aluminosilicate gels with zeolite beta seeds

Yoshihiro Kamimura, Kenta Iyoki, Shanmugam Palani Elangovan, Keiji Itabashi, Atsushi Shimojima, and Tatsuya Okubo

Microporous and Mesoporous Materials, 163 282, 2012
Synthesis of MTW-type Zeolites in the Absence of Organic Structure-directing Agent

Kenta Iyoki, Yoshihiro Kamimura, Keiji Itabashi, Atsushi Shimojima, and Tatsuya Okubo

Chemistry Letters, 39, 730, 2010

研究業績 Publications

Controlling Aluminum Siting in Low-Silica Zeolite Frameworks: A Post-Synthetic Approach Exemplified by MAZ-type Topology

Yuto Yoshida, Kota Yamashita, Koki Muraoka, Masahito Hasumi, Ryota Osuga, Yutaka Yanaba, Kiyotaka Nakajima, Akira Nakayama, Toru Wakihara, Tatsuya Okubo, Kenta Iyoki

Exploring the Improvement of NOx Conversion and N2 Selectivity by Tandem Layer Cu/Fe–Zeolite Catalysts for NH3–SCR

Jingyun Yu, Raquel Simancas, Shanmugam P. Elangovan, Haruko Fujinuma, Kenta Iyoki, Tatsuya Okubo, Toru Wakihara

Drawing boundaries between feasible and unfeasible zeolite intergrowths using high-throughput computational screening with synthesis validation

Kota Oishi, Koki Muraoka, Satoko Toyama, Takeshi Iwata, Takehito Seki, Naoya Shibata, Kenta Iyoki, Toru Wakihara, Tatsuya Okubo, Akira Nakayama

Capture of Low-concentration Carbon Dioxide with Ultrafast-synthesized MOR-type Zeolites as Adsorbents

Duanxing Li, Xiaofei Lu, Anand Chokkalingam, Kenta Iyoki

Antiviral potential of proton-type zeolite

Yuka Kimura, Masanori Takemoto, Noriko Nakamura, Takeshi Ichinohe, Makoto Nakakido, Kenta Iyoki, Seiichi Ohta, Nobuhiro Miyamae, Yuki Egami, Koichi Sato, Tatsuya Okubo, Kouhei Tsumoto, Toru Wakihara

Preparation of translucent silicalite-1 bulk ceramics by spark plasma sintering

Masanori Takemoto, Yoshiaki Ito, Yuka Yoshihara, Shiori Odagiri, Yuta Shuseki, Kenta Iyoki, Tatsuya Okubo, Atsunobu Masuno, Toru Wakihara

Photocatalytic evolution of nitrous oxide from nitric monoxide over Pt-loaded titanium dioxide under UV irradiation

Ryo Asayama, Masanori Takemoto, Arata Suzuki, Ryuichi Watanabe, Fuminao Kishimoto, Kenta Iyoki, Tatsuya Okubo, and Toru Wakihara

Achieving extreme thermal stability of high-silica FAU through trace water-assisted steam treatment

Boqing Li, Raquel Simancas, Kenta Iyoki, Shanmugam P. Elangovan, Takahiro Ohkubo, Tatsuya Okubo, and Toru Wakihara

Development of zeolite adsorbent with low water sensitivity for CO2 capture

Peidong Hu, Ryusei Oishi, Hanlong Ya, Yasuo Yonezawa, Minoru Matsukura, Kenta Iyoki, Tatsuya Okubo, Toru Wakihara

Adsorption behavior of low-concentration nitrous oxide on natural mordenite zeolite

Saeko Yamaguchi, Peidong Hu, Hanlong Ya, Peipei Xiao, Ayako Nakata, Tsuyoshi Miyazaki, Yoshitada Morikawa, Junko N. Kondo, Kotaro Tange, Kenichi Tonokura, Masanori Takemoto, Yasuo Yonezawa, Toshiyuki Yokoi, Kenta Iyoki, Tatsuya Okubo, Toru Wakihara

Liquid-Mediated Treatment for Silanol Defects Healing and Sn Coordination Optimization in Sn-Beta for Improved Catalytic Activity

Boqing Li, Raquel Simancas, Hiroki Nagashima, Kenta Iyoki, Shanmugam P. Elangovan, Anand Chokkalingam, Takayuki Yamagishi, Satoshi Inagaki, Tatsuya Okubo, and Toru Wakihara

Removal of Radioactive Noble Gas Radon from Air by Ag-Zeolite

Hiroshi Ogawa, Yasuo Takeuchi, Hiroyuki Sekiya, Kenta Iyoki, Minoru Matsukura, Toru Wakihara, Yuuki Nakano, Shigeru Hirano, Akio Taniguchi

Superior low temperature activity over α-MnO2/β-MnOOH catalyst for selective catalytic reduction of NOx with ammonia

Masanori Takemoto, Haruko Fujinuma, Yoshihiro Sugawara, Yukichi Sasaki, Kenta Iyoki, Tatsuya Okubo, Kazuya Yamaguchi, and Toru Wakihara

Simultaneous Control of Aluminum Atoms and Defects in MOR Zeolite Framework by Post-Synthetic Treatments

Yuki Fujikawa, Tatsushi Yoshioka, Kenta Iyoki, Takahiro Ohkubo, Tatsuya Okubo, Toru Wakihara

Effect of defect-healing treatment on layered silicate precursors toward well-defined crosslinked frameworks

Yoshiaki Ito, Keiichiro Nayuki, Yukichi Sasaki, Toru Wakihara, Tatsuya Okubo, and Kenta Iyoki

Improving mechanical stability of ZSM-5 zeolite by defect-healing treatment

Masanori Takemoto, Yuka Yoshihara, Yoshiaki Ito, Hiroki Yamada, Kenta Iyoki, Tatsuya Okubo, Toru Wakihara

Measurement of radon emanation and impurity adsorption from argon gas using ultralow radioactive zeolite

Hiroshi Ogawa, Kenta Iyoki, Minoru Matsukura, Toru Wakihara, Ko Abe, Kentaro Miuchi, Saori Umehara

Unexpected Low Temperature Activity with Low N2O Emission of Stabilized Al-rich Zeolite Beta for Selective Catalytic Reduction of NOx

Jingyun Yu, Kenta Iyoki, Shanmugam P. Elangovan, Haruko Fujinuma, Tatsuya Okubo, Toru Wakihara

Dealumination of RHO zeolite by acid treatment and recrystallization with organic pore filler

Tatsushi Yoshioka, Kenta Iyoki, Yutaka Yanaba, Tatsuya Okubo, Toru Wakihara

Selective Hydrogenation of Carbon Dioxide to Light Hydrocarbons over ZnZrOx/HMFI Composite Catalyst with Long-term Stability

Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura

Hydrophobicity Manipulation of Titanium-silicalite-1 with Enhanced Catalytic Performance via Liquid-mediated Defect-healing Treatment

Boqing Li, Kenta Iyoki, Piyapatch Techasarintr, Shanmugam Elangovan, Raquel Simancas, Tatsuya Okubo, Toshiyuki Yokoi, Toru Wakihara

Drastic Photoemission Color Alternation from a Single Molecule as a Starting Material Introduced in Acid-Treated Zeolites: From Pure Blue to White

Fuminao Kishimoto, Kyohei Hisano, Tatsushi Yoshioka, Kenta Iyoki, Toru Wakihara, and Tatsuya Okubo

Postsynthetically Tailoring Acid Properties and Pore Structures of ZnZrOx/MFI Catalysts for One-Pass CO2 Hydrogenation

Duanxing Li, Xiaofei Lu, Hiroka Kinoshita, Masanori Takemoto, Anand Chokkalingam, Shohei Tada, and Kenta Iyoki

Optimal mixing method of ZnZrOx and MOR-type zeolite to prepare a bifunctional catalyst for CO2 hydrogenation to lower olefins

Shohei Tada, Hiroka Kinoshita, Duanxing Li, Masahiko Nishijima, Harune Yamaguchi, Ryuji Kikcuhi, Noriko Yamauchi, Yoshio Kobayashi, Kenta Iyoki

Precise tuning of the properties of MOR-type zeolite nanoparticles to improve lower olefins selectivity in composite catalysts for CO2 hydrogenation

Ryusei Oishi, Duanxing Li, Mina Okazaki, Hiroka Kinoshita, Nagomu Ochiai, Noriko Yamauchi, Yoshio Kobayashi, Toru Wakihara, Tatsuya Okubo, Shohei Tada, Kenta Iyoki

Atom-Selective Analyses Reveal the Structure-Directing Effect of Cs Cation on the Synthesis of Zeolites

Hiroki Yamada, Hirofumi Horikawa, Chokkalingam Anand, Koji Ohara, Toshiaki Ina, Akihiko Machida, Satoshi Tominaka, Tatsuya Okubo, Zhendong Liu, Kenta Iyoki, and Toru Wakihara

Control of Competitive Structure-Directing Effect in CON-Type Zeolite Synthesis via Intermediate Addition Method

Takumi Shibuya, Kenta Iyoki, Hiroaki Onozuka, Masanori Takemoto, Susumu Tsutsuminai, Takahiko Takewaki, Toru Wakihara, and Tatsuya Okubo

Synthesis and thermal stability of SOD-type SAPO-20 via interzeolite conversion of FAU-type SAPO-37 using tetramethylammonium hydroxide and piperidine

Masanori Takemoto, Yuki Fujikawa, Kenta Iyoki, Nao Tsunoji, Tsuneji Sano, Tatsuya Okubo and Toru Wakihara

Amorphous aluminosilicates as efficient ion exchangers for ammonium cation removal from aqueous solutions

Raquel Simancas, Masamori Takemura, Ching-Tien Chen, Kenta Iyoki, Tatsuya. Okubo Toru Wakihara

Biased Al distribution of high-silica FAU-type zeolite synthesized by fast manner at high temperature

Yuki Sada, Shoko Miyagi, Kenta Iyoki, Masato Yoshioka, Tomoya Ishikawa, Yusuke Naraki, Tsuneji Sano, Tatsuya Okubo, Toru Wakihara

OSDA-free synthesis of zeolite beta: Broadening the methodology for a successful use of the product as a seed

Junki Tomita, Shanmugam P. Elangovan, Keiji Itabashi, Anand Chokkalingam, Haruko Fujinuma, Zhigang Hao, Akihiro Kanno, Katsuhiko Hayashi, Kenta Iyoki, Toru Wakihara, Tatsuya Okubo

Ultrafast dealumination of *BEA zeolite using a continuous-flow reactor

Ayano Minami, Masanori Takemoto, Yasuo Yonezawa, Zhendong Liu, Yutaka Yanaba, Anand Chokkalingam, Kenta Iyoki, Tsuneji Sano, Tatsuya Okubo, Toru Wakihara

Influence of Si/Al ratio of MOR type zeolites for bifunctional catalysts specific to the one-pass synthesis of lower olefins via CO2 hydrogenation

Shohei Tada, Duanxing Li, Mina Okazaki, Hiroka Kinoshita, Masahiko Nishijima, Noriko Yamauchi, Yoshio Kobayashi, Kenta Iyoki

Dealumination of small-pore zeolites through pore-opening migration process with the aid of pore-filler stabilization

Tatsushi Yoshioka, Kenta Iyoki, Yuusuke Hotta, Yoshihiro Kamimura, Hiroki Yamada, Qiao Han, Takeharu Kato, Craig A. J. Fisher, Zhendong Liu, Ryohji Ohnishi, Yutaka Yanaba, Koji Ohara, Yukichi Sasaki, Akira Endo, Takahiko Takewaki, Tsuneji Sano, Tatsuya Okubo, Toru Wakihara

Active Sites on ZnxZr1–xO2–x Solid Solution Catalysts for CO2-to-Methanol Hydrogenation

Shohei Tada, Nagomu Ochiai, Hiroka Kinoshita, Mitsuhiro Yoshida, Natsumi Shimada, Tatsuya Joutsuka, Masahiko Nishijima, Tetsuo Honma, Noriko Yamauchi, Yoshio Kobayashi, and Kenta Iyoki

Robust CON-type zeolite nanocatalyst in methanol-to-olefins reaction: downsizing, recrystallisation and defect-healing treatments toward prolonged lifetime

Masanori Takemoto, Kenta Iyoki, Yuki Otsuka, Hiroaki Onozuka, Anand Chokkalingam, Toshiyuki Yokoi, Susumu Tsutsuminai, Takahiko Takewaki, Toru Wakahira and Tatsuya Okubo

Exploring hydrothermal synthesis of SAPO-18 under high hydrostatic pressure

Raquel Simancas, Masamori Takemura, Yasuo Yonezawa, Sohei Sukenaga, Mariko Ando, Hiroyuki Shibata, Anand Chokkalingam, Kenta Iyoki, Tatsuya Okubo, and Toru Wakihara

Broadening Synthetic Scope of SSZ-39 Zeolite: A Fast and Direct Route from Amorphous Starting Materials

Peidong Hu, Kenta Iyoki, Haruko Fujinuma, Jingyun Yu, Sijing Yu, Chokkalingam Anand, Yutaka Yanaba, Tatsuya Okubo, and Toru Wakihara

Reduction of Crystal Size of Silicalite-1 Synthesized in Fluoride-Containing Media via Multi-Stage Heating with Intermediate Stirring

Kenta Iyoki, Takako Onishi, Mariko Ando, Sohei Sukenaga, Hiroyuki Shibata Tatsuya Okubo, and Toru Wakihara

Search for solid acid catalysts aiming at the development of bifunctional tandem catalysts for the one-pass synthesis of lower olefins via CO2 hydrogenation

Superior low temperature activity over α-MnO₂/β-MnOOH catalyst for selective catalytic reduction of NO_x with ammonia

Unexpected Low Temperature Activity with Low N₂O Emission of Stabilized Al-rich Zeolite Beta for Selective Catalytic Reduction of NO_x

Selective Hydrogenation of Carbon Dioxide to Light Hydrocarbons over ZnZrO_x/HMFI Composite Catalyst with Long-term Stability

Postsynthetically Tailoring Acid Properties and Pore Structures of ZnZrO_x/MFI Catalysts for One-Pass CO₂ Hydrogenation

Optimal mixing method of ZnZrO_x and MOR-type zeolite to prepare a bifunctional catalyst for CO₂ hydrogenation to lower olefins

Precise tuning of the properties of MOR-type zeolite nanoparticles to improve lower olefins selectivity in composite catalysts for CO₂ hydrogenation

Influence of Si/Al ratio of MOR type zeolites for bifunctional catalysts specific to the one-pass synthesis of lower olefins via CO₂ hydrogenation

Active Sites on Zn_xZr_1–xO_2–x Solid Solution Catalysts for CO₂-to-Methanol Hydrogenation

Search for solid acid catalysts aiming at the development of bifunctional tandem catalysts for the one-pass synthesis of lower olefins via CO₂ hydrogenation

Influence of reaction temperature on CO₂-to-methanol hydrogenation over MZrO_x (M = Al, Mn, Cu, Zn, Ga, and In)

Ultrafast synthesis of AFX-Type zeolite with enhanced activity in the selective catalytic reduction of NO_x and hydrothermal stability

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