Ultra-thin TiO2 sheets with rich surface disorders for enhanced photocatalytic performance under simulated sunlight

JOURNAL OF ALLOYS AND COMPOUNDS

卷:745

Article

Wang, Le¹  Wu, Dapeng²  Guo, Zheng⁴  Yan, Jingjing²  Hu, Yuansen¹  Chang, Zheng³  Yuan, Qipeng³  Ming, Hui¹  Wang, Jinshui¹ 

[1] Henan Univ Technol, Sch Biol Engn, Zhengzhou, Henan, Peoples R China

[2] Henan Normal Univ, Sch Chem & Chem Engn, Xinxiang 453007, Henan, Peoples R China

[3] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing, Peoples R China

[4] Zhongyuan Univ Technol, Coll Text, Zhengzhou, Henan, Peoples R China

关键词: TiO2;    Nanocrystalline materials;    Semiconductors;    Surface disorder;    Photocatalyst;   

DOI  :  10.1016/j.jallcom.2018.02.070

来源: Elsevier

【 摘 要 】

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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