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Synthesis of core/shell Ti/TiOx photocatalyst via single-mode magnetic microwave assisted direct oxidation of TiH2
- Authors
- Kato K.; Xin Y.; Hong J.; Katsumata K.-I.; Shirai T.
- Issue Date
- May-2020
- Publisher
- Elsevier B.V.
- Keywords
- Core/shell particle; Direct oxidation; Single-mode microwave; TiO2; Visible-light photocatalyst
- Citation
- Advanced Powder Technology, v.31, no.5, pp.1777 - 783
- Journal Title
- Advanced Powder Technology
- Volume
- 31
- Number
- 5
- Start Page
- 1777
- End Page
- 783
- ISSN
- 0921-8831
- Abstract
- Submicron core/shell Ti/TiOx photocatalyst is successfully synthesized via single-mode magnetic microwave (SMMW) assisted direct oxidation of planetary ball-milled TiH2. The thickness of TiOx shell including highly concentrated defects such as Ti3+ and/or oxygen vacancies is controllable in the range from 6 to over 18 nm by varying the treatment time in the SMMW assisted reaction. In addition to its quite narrow optical bandgap (1.34–2.69 eV) and efficient visible-light absorption capacity, the submicron Ti/TiOx particle exhibits superior photocatalytic performance towards H2 production from water under both UV and visible-light irradiation to compare with a commercial TiO2 photocatalyst (P-25). Such excellent performance can be achieved by the synergetic effect of enhancement in visible light absorption capacity and photo-excited carrier separation because of the highly concentrated surface defects and the specific Ti/TiOx core/shell structure, respectively. © 2020 The Society of Powder Technology Japan
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Related Researcher
- Hong, Jeong Soo
- College of IT Convergence (Department of Electrical Engineering)