期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 546, 期 -, 页码 262-275出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.03.080
关键词
YC sphere; 2D-2D Cu2WS4/g-C3N4, Cr (VI); Degradation TC; D. magna
资金
- National Natural Science Foundation of China [21805115, 21576112, U1810117, 21606114]
- Postdoctoral Science Foundation of China [2017M611712, 2017M611717]
- Jiangsu Planned Projects for post-doctoral Research Funds [1701025A]
- Scientific Research Foundation for Senior Talent of Jiangsu University [17JDG020]
It is very challenging to fabricate novel, high-efficiency photocatalysts with an enhanced visible light absorption capacity, high charge carrier separation efficiency, and large specific surface area. For this purpose, a yeast-derived carbon (YC) sphere was added as a charge carrier bridge to the 2D-2D Cu2WS4/g-C3N4 heterojunction through a facile hydrothermal method. The YC sphere, as a bridge for electrons, is not only advantageous in inhibiting rapid recombination by electrons, but also remarkably enhances the visible light absorption capacity. Moreover, the YC sphere can also increase the specific surface area and surface roughness, which can enhance the adsorption of pollutant molecules and provide abundant active sites for photocatalytic reactions. The g-C3N4/YC/Cu2WS4 heterojunction showed the best photo catalytic activity for reducing hexavalent chromium Cr(VI) and decomposing tetracycline (TC) under visible light. Meanwhile, the acute toxicity of Daphnia magna (D. magna) gradually decreases with the conversion of Cr(VI) to Cr(III) in solution. In addition, the possible intermediate products and the photo catalytic reaction mechanism are revealed in depth. This work provides a general example for improving the photocatalytic activity of 2D-2D based heterojunctions by introducing a biomass material. (C) 2019 Elsevier Inc. All rights reserved.
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