Research activity information

• Mar. 2021 高知工科大学, 佐久間賞

  隈部佳孝


• Oct. 2019 高知化学シンポジウム2019, 優秀ポスター発表賞

  隈部佳孝


• Aug. 2018 6th International Solvothermal and Hydrothermal Association Conference, ISHA 2018 Graduate Student Awards

  Yoshitaka Kumabe


• Mar. 2018 平成29年度日本化学会中国四国支部, 支部長賞

  隈部佳孝


• Sep. 2016 化学工学会第48回秋季大会 超臨界流体部会シンポジウム, 学生賞

  隈部佳孝

• Machine-Learning-Driven Photocurrent Prediction in Multielement-Doped Hematite Photoelectrodes

  Takuma Nishimura, Yoshitaka Kumabe, Yosuke Harashima, Mikiya Fujii, Takashi Tachikawa

  Lead, American Chemical Society (ACS), Jul. 2025, ACS Catalysis, 15, 11993 - 12004, English, International magazine

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Impact of Solvent-Induced Surface Restructuring on Charge Carrier Dynamics in DMASnI₃

  Naozumi Tanaka, Yoshitaka Kumabe, Takashi Tachikawa

  American Chemical Society (ACS), Jun. 2025, ACS Applied Materials & Interfaces, 17(24) (24), 35552 - 35561

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Unassisted self-healing photocatalysts based on Le Chatelier’s principle

  Aito Takeuchi, Yoshitaka Kumabe, Takashi Tachikawa

  Abstract Self-healing is a fundamental ability inherent in humans, plants, and other living organisms. To date, a variety of materials with self-healing properties have been developed. However, these materials usually require external inputs such as electric potentials or healing agents to initiate or promote self-healing reactions. Herein, we present a novel self-healing mechanism that operates without any external input, utilizing the dynamic equilibrium between the solid-state and dissolved materials. We employed organic–inorganic perovskites to validate our strategy. Single-particle spectroscopy and imaging demonstrated the spontaneous self-healing of perovskites after photodamage under dynamic equilibrium conditions. Furthermore, we found that perovskites can generate hydrogen in both healed and damaged states. Remarkably, the perovskites exhibited hydrogen generation over four cycles of photodamage and self-healing. The proposed concept and experimental results provide valuable insights for the development of energy conversion and storage systems with improved long-term durability.

  Springer Science and Business Media LLC, Apr. 2025, Communications Chemistry, 8(1) (1)

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Unravelling the Influence of Major Seawater Salt Ions on the Photogenerated Charge Carriers in a Sr-Doped NaTaO3 Photocatalyst via ATR-FTIR

  Yi-Hao Chew, Naoki Saijo, Yoshitaka Kumabe, Takashi Tachikawa, Hiroshi Onishi

  Feb. 2025, The Journal of Physical Chemistry C

  [Refereed]

  Scientific journal


• Size‐Controlled Synthesis of Luminescent Few‐Atom Silver Clusters via Electron Transfer in Isostructural Redox‐Active Porous Ionic Crystals

  Naoya Haraguchi, Naoki Ogiwara, Yoshitaka Kumabe, Soichi Kikkawa, Seiji Yamazoe, Takashi Tachikawa, Sayaka Uchida

  Jun. 2023, Small

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Intricate Reaction Pathways on CH3NH3PbI3 Photocatalysts in Aqueous Solution Unraveled by Single-Particle Spectroscopy

  Aito Takeuchi, Yoshitaka Kumabe, Takashi Tachikawa

  Mar. 2023, The Journal of Physical Chemistry Letters

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Binary dopant segregation enables hematite-based heterostructures for highly efficient solar H2O2 synthesis

  Zhujun Zhang, Takashi Tsuchimochi, Toshiaki Ina, Yoshitaka Kumabe, Shunsuke Muto, Koji Ohara, Hiroki Yamada, Seiichiro L. Ten-no, Takashi Tachikawa

  Abstract Dopant segregation, frequently observed in ionic oxides, is useful for engineering materials and devices. However, due to the poor driving force for ion migration and/or the presence of substantial grain boundaries, dopants are mostly confined within a nanoscale region. Herein, we demonstrate that core–shell heterostructures are formed by oriented self-segregation using one-step thermal annealing of metal-doped hematite mesocrystals at relatively low temperatures in air. The sintering of highly ordered interfaces between the nanocrystal subunits inside the mesocrystal eliminates grain boundaries, leaving numerous oxygen vacancies in the bulk. This results in the efficient segregation of dopants (~90%) on the external surface, which forms their oxide overlayers. The optimized photoanode based on hematite mesocrystals with oxide overlayers containing Sn and Ti dopants realises high activity (~0.8 μmol min⁻¹ cm⁻²) and selectivity (~90%) for photoelectrochemical H₂O₂ production, which provides a wide range of application for the proposed concept.

  Springer Science and Business Media LLC, Mar. 2022, Nature Communications, 13(1) (1), 1499, English

  [Refereed]

  Scientific journal

  Link to Kobe Univ. Repository (Kernel)


• Ce3+-enriched spherical porous ceria with an enhanced oxygen storage capacity

  Ayano Taniguchi, Yoshitaka Kumabe, Kai Kan, Masataka Ohtani, Kazuya Kobiro

  Spherical porous ceria having high content of Ce³⁺ species was synthesized by the solvothermal method using acetonitrile as a solvent. The spherical porous ceria possesses superior oxygen storage capacity owing to its high Ce³⁺ contents.

  Royal Society of Chemistry (RSC), Feb. 2021, RSC Advances, 11(10) (10), 5609 - 5617, English

  [Refereed]

  Scientific journal


• Porous niobia spheres with large surface area: alcothermal synthesis and controlling of their composition and phase transition behaviour

  Yoshitaka Kumabe, Hitomi Taga, Kai Kan, Masataka Ohtani, Kazuya Kobiro

  Nb₂O₅, TiO₂–Nb₂O₅, and TiNb₂O₇ porous spheres with large surface area were synthesized by alcothermal reaction and calcination.

  Lead, Royal Society of Chemistry (RSC), Apr. 2020, RSC Advances, 10(25) (25), 14630 - 14636, English

  [Refereed]

  Scientific journal


• Controllable synthesis of MoS2/graphene low-dimensional nanocomposites and their electrical properties

  Le Ngoc Long, Pham Tan Thi, Pham Trung Kien, Pham Thanh Trung, Masataka Ohtani, Yoshitaka Kumabe, Hirofumi Tanaka, Shigenori Ueda, Hyoyoung Lee, Phan Bach Thang, Tran Van Khai

  Elsevier BV, Feb. 2020, Applied Surface Science, 504, 144193 - 144193, English

  [Refereed]

  Scientific journal


• Highly durable Ru catalysts supported on CeO2 nanocomposites for CO2 methanation

  Hien Thi Thu Nguyen, Yoshitaka Kumabe, Shigenori Ueda, Kai Kan, Masataka Ohtani, Kazuya Kobiro

  Elsevier BV, May 2019, Applied Catalysis A: General, 577, 35 - 43, English

  [Refereed]

  Scientific journal


• Rapid one-pot synthesis of ultrafine titania nanocrystals and their conversion into transparent mesoporous thin layer films

  Yoshitaka Kumabe, Masataka Ohtani, Kazuya Kobiro

  Lead, Elsevier BV, May 2018, Microporous and Mesoporous Materials, 261, 207 - 213, English

  [Refereed]

  Scientific journal

• Local Structural Analysis of Composite Oxide Mesocrystal Photocatalysts

  Yoshitaka Kumabea, Toshiaki Inab, Koji Oharac, Takashi Tachikawaa

  Lead, Feb. 2026, SPring-8/SACLA 利用研究成果集, 14(1) (1), 1 - 4, Japanese

  [Refereed]


• ナノ凹凸多孔体の一段階大量合成と耐熱触媒担体への応用 (特集 ナノテクノロジーの探索)

  大谷 政孝, 隈部 佳孝, 闞 凱, 小廣 和哉

  化学工業社, May 2019, ケミカルエンジニヤリング, 64(5) (5), 319 - 325, Japanese

• Rapid heating solvothermal synthesis of ultrafine nanoparticles and formation of their porous thin layer films

  隈部 佳孝, 大谷 政孝, 小廣 和哉

  日本化学会第98春季年会, Mar. 2018, English

  Poster presentation


• Effect of Acid Additives on Methanol Solvothermal Reaction of Titanium Tetraalkoxide

  Yoshitaka Kumabe, Masataka Ohtani, Kazuya Kobiro

  Supergreen 2017 (The 10th International Conference on Supercritical Fluids), Dec. 2017, English

  Poster presentation


• Synthesis of Titania Nanocrystals with Sub-5 nm Size and Conversion into Porous Thin Layer Transparent Films

  Yoshitaka Kumabe, Masataka Ohtani, Kazuya Kobiro

  The 6th International Symposium on Frontier Technology, Nov. 2017, English

  Oral presentation


• 透明TiO2薄膜調製のための極小ナノ粒子ワンポット合成

  隈部佳孝, 大谷政孝, 小廣和哉

  ナノテク研シンポジウム2017, Nov. 2017, Japanese

  Poster presentation


• Rapid One-pot Synthesis of Titania Nanocrystals with Sub-5 nm Size

  Yoshitaka Kumabe, Masataka Ohtani, Kazuya Kobiro

  The 17th Congress of Asian Pacific Confederation of Chemical Engineering, Aug. 2017, English

  Oral presentation


• スクアリン酸－チタンナノ構造体の合成とその光触媒活性の評価

  隈部佳孝

  第５回 高知大学－高知工科大学ジョイントセミナー, Jun. 2017, Japanese

  Oral presentation


• 極小酸化チタンナノロッドを用いた透明半導体薄膜の形成

  隈部佳孝, 大谷政孝, 小廣和哉

  ナノテク研シンポジウム2016, Nov. 2016, Japanese

  Poster presentation


• 不飽和脂肪酸を用いた極小酸化チタンナノロッドの高温高圧合成

  隈部佳孝, 大谷政孝, 小廣和哉

  化学工学会第48回秋季大会, Sep. 2016, Japanese

  Oral presentation


• 極小酸化チタンナノロッドの合成と薄膜形成

  隈部佳孝, 大谷政孝, 小廣和哉

  高知化学会第29回研究会, Aug. 2016, Japanese

  Poster presentation


• Synthesis of Titanium Dioxide Assemblies with 2D Hexagonal Nanostructure

  Yoshitaka Kumabe, Masataka Ohtani, Kazuya Kobiro

  日本化学会第96春季年会, Mar. 2016, Japanese

  Poster presentation


• ソルボサーマル粒子合成における有機カルボン酸の構造規定効果

  隈部佳孝, 大谷政孝, 小廣和哉

  ナノテク研シンポジウム2015, Nov. 2015, Japanese

  Poster presentation


• 有機カルボン酸を構造規定剤とする酸化チタンナノ粒子集合体の合成

  隈部佳孝, 大谷政孝, 小廣和哉

  高知化学会第28回研究会, Aug. 2015, Japanese

  Poster presentation

• 光化学協会


• 化学工学会


• 日本化学会

• Development of Single-Molecule Reaction Imaging Techniques for Visualizing Carbon Resource Transformation

  立川 貴士, 隈部 佳孝, 松原 亮介, 木村 哲就

  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Fund for the Promotion of Joint International Research (International Collaborative Research), Kobe University, Sep. 2023 - Mar. 2027

• コンピュータシステム、ドープ元素探索方法、コンピュータ実装方法、及びコンピュータプログラム

  立川貴士, 隈部佳孝, 西村拓真

  特願2025-51715, 26 Mar. 2025

  Patent right


• 光触媒の製造方法

  立川貴士, 隈部佳孝

  特願2025-004509, 14 Jan. 2025

  Patent right


• 誘電体磁器組成物

  立川貴士, 隈部佳孝, 中川瞭, 金田和巳

  特願2024-220478, 17 Dec. 2024

  Patent right


• 誘電体材料の製造方法

  立川貴士, 隈部佳孝

  特願2022-170938, 25 Oct. 2022, 国立大学法人神戸大学, 特開2024-062834, 10 May 2024

  Patent right