An Unusual Strong Visible-Light Absorption Band in Red Anatase TiO2 Photocatalyst Induced by Atomic Hydrogen-Occupied Oxygen Vacancies

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	An Unusual Strong Visible-Light Absorption Band in Red Anatase TiO2 Photocatalyst Induced by Atomic Hydrogen-Occupied Oxygen Vacancies
	Yang, YQ; Yin, LC; Gong, Y; Niu, P; Wang, JQ; Gu, L; Chen, XQ; Liu, G; Wang, LZ; Cheng, HM
刊名	ADVANCED MATERIALS
	2018-02-08
卷号	30 期号:6 页码:-
关键词	Electron-spin-resonance State Z-scheme Carbon Nitride Polycrystalline Tio2 Energy-conversion Titanium-dioxide Water Efficiency Evolution Performance
ISSN号	0935-9648
英文摘要	Increasing visible light absorption of classic wide-bandgap photocatalysts like TiO2 has long been pursued in order to promote solar energy conversion. Modulating the composition and/or stoichiometry of these photocatalysts is essential to narrow their bandgap for a strong visible-light absorption band. However, the bands obtained so far normally suffer from a low absorbance and/or narrow range. Herein, in contrast to the common tail-like absorption band in hydrogen-free oxygen-deficient TiO2, an unusual strong absorption band spanning the full spectrum of visible light is achieved in anatase TiO2 by intentionally introducing atomic hydrogen-mediated oxygen vacancies. Combining experimental characterizations with theoretical calculations reveals the excitation of a new subvalence band associated with atomic hydrogen filled oxygen vacancies as the origin of such band, which subsequently leads to active photo-electrochemical water oxidation under visible light. These findings could provide a powerful way of tailoring wide-bandgap semiconductors to fully capture solar light.; Increasing visible light absorption of classic wide-bandgap photocatalysts like TiO2 has long been pursued in order to promote solar energy conversion. Modulating the composition and/or stoichiometry of these photocatalysts is essential to narrow their bandgap for a strong visible-light absorption band. However, the bands obtained so far normally suffer from a low absorbance and/or narrow range. Herein, in contrast to the common tail-like absorption band in hydrogen-free oxygen-deficient TiO2, an unusual strong absorption band spanning the full spectrum of visible light is achieved in anatase TiO2 by intentionally introducing atomic hydrogen-mediated oxygen vacancies. Combining experimental characterizations with theoretical calculations reveals the excitation of a new subvalence band associated with atomic hydrogen filled oxygen vacancies as the origin of such band, which subsequently leads to active photo-electrochemical water oxidation under visible light. These findings could provide a powerful way of tailoring wide-bandgap semiconductors to fully capture solar light.
学科主题	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
语种	英语
资助机构	Major Basic Research Program, Ministry of Science and Technology of China [2014CB239401]; National Science Fund of China [51422210, 21633009, 51629201, 51521091]; Key Research Program of Frontier Sciences CAS [QYZDB-SSW-JSC039]; IMR SYNL-T.S
公开日期	2018-06-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79512]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liu, G; Cheng, HM (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.; Liu, G (reprint author), Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China.; Cheng, HM (reprint author), Tsinghua Univ, Tsinghua Berkeley Shenzhen Inst, Low Dimens Mat & Device Lab, 1001 Xueyuan Rd, Shenzhen 518055, Peoples R China.; Cheng, HM (reprint author), King Abdulaziz Univ, Ctr Excellence Environm Studies, Jeddah 21589, Saudi Arabia.
推荐引用方式 GB/T 7714	Yang, YQ,Yin, LC,Gong, Y,et al. An Unusual Strong Visible-Light Absorption Band in Red Anatase TiO2 Photocatalyst Induced by Atomic Hydrogen-Occupied Oxygen Vacancies[J]. ADVANCED MATERIALS,2018,30(6):-.
APA	Yang, YQ.,Yin, LC.,Gong, Y.,Niu, P.,Wang, JQ.,...&Cheng, HM .(2018).An Unusual Strong Visible-Light Absorption Band in Red Anatase TiO2 Photocatalyst Induced by Atomic Hydrogen-Occupied Oxygen Vacancies.ADVANCED MATERIALS,30(6),-.
MLA	Yang, YQ,et al."An Unusual Strong Visible-Light Absorption Band in Red Anatase TiO2 Photocatalyst Induced by Atomic Hydrogen-Occupied Oxygen Vacancies".ADVANCED MATERIALS 30.6(2018):-.