期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 312, 期 -, 页码 298-306出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2016.03.044
关键词
Graphene quantum dots; AgVO3 nanoribbons; Heterojunction photocatalyst; Ibuprofen; Degradation pathways
资金
- National Natural Science Foundation of China [41573096]
- Sail Plan of Shanghai for Youth [16YF1404400]
- Major State Basic Research Development Program of China [2011CB933402]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT13078]
Single crystalline, non-toxicity, and long-term stability graphene quantum dots (GQDs) were modified onto the AgVO3 nanoribbons by a facile hydrothermal and sintering technique which constructs a unique heterojunction photocatalyst. Characterization results indicate that GQDs are well dispersed on the surface of AgVO3 nanoribbons and GQD/AgVO3 heterojunctions are formed, which can greatly promote the separation efficiency of photogenerated electron-hole pairs under visible light irradiation. By taking advantage of this feature, the GQD/AgVO3 heterojunctions exhibit considerable improvement on the photocatalytic activities for the degradation of ibuprofen (IBP) under visible light irradiation as compared to pure AgVO3. The photocatalytic activity of GQD/AgVO3 heterojunctions is relevant with GQD ratio and the optimal activity is obtained at 3 wt% with the highest separation efficiency of photogenerated electron-hole pairs. Integrating the physicochemical and photocatalytic properties, the factors controlling the photocatalytic activity of GQD/AgVO3 heterojunctions are discussed in detail. Moreover, potential photocatalytic degradation mechanisms of IBP via GQD/AgVO3 heterojunctions under visible light are proposed. (C) 2016 Elsevier B.V. All rights reserved.
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