期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 745, 期 -, 页码 26-32出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.02.070
关键词
TiO2; Nanocrystalline materials; Semiconductors; Surface disorder; Photocatalyst
资金
- National Science Foundation of China [21306040, U1305505, 51772078]
- Program for Innovative Research Team and Individuals in University of Henan Province [18HASTIT015]
- Science and Technology Research Projects of Henan province [162102210268, 162300410174, 162107000043]
- Key Scientific Research Project of Colleges and Universities in Henan Province [16A416001]
- Science Foundation of Henan University of Technology [2014CXRC06]
Ultra-thin hydrogenated black TiO2 sheets with rich surface disorders were prepared by a facile hydrogenation of submicrometer sized TiO2 sheets. Due to the reduced band gap of 2.81 eV, the light harvesting ability of black TiO2 sheets is enhanced in the visible range. In addition, the rich surface disorder reduces the primary particle-size and increases the surface area from 20.9 to 46.2 m(2)g(-1), which enhances the population of active catalytic sites and substantially improves the photocatalytic activities both under visible light and full spectrum solar light. The mechanism tests indicate the black TiO2 sheets triggered photodegradation is a hole mediated process. Moreover, the catalyst shows long-term stability, which permits its potential application in the real waste water treatment. (c) 2018 Elsevier B.V. All rights reserved.
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