Facile fabrication of CdS/ZnAlO heterojunction with enhanced photocatalytic activity for Cr(VI) reduction under visible light
| Autor: | Jia-Chao Shen, Chao-Rong Chen, Yun-Xin Sun, Jin-Ze Du, Runliang Zhu, Guo Hu, Sheng Xu, Hong-Yan Zeng |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Band gap Geology Heterojunction 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Hydrothermal circulation Cadmium sulfide 0104 chemical sciences Catalysis chemistry.chemical_compound Adsorption Chemical engineering chemistry Geochemistry and Petrology Photocatalysis 0210 nano-technology Visible spectrum |
| Zdroj: | Applied Clay Science. 165:197-204 |
| ISSN: | 0169-1317 |
| Popis: | Cadmium sulfide (CdS) is an excellent visible light responsive material for the appropriate band gap, but the high electron-hole recombination and particle aggregation of CdS seriously limited its practical application in photocatalysis. In this work, the CdS/ZnAlO heterostructures photocatalyst was synthesized via a facile hydrothermal method. The structural characterizations showed that the particles aggregation of CdS and the separation of photogenerated electron-hole pairs were obviously improvement. The CdS/ZnAlO composite showed the highest photocatalytic activity for Cr(VI) reduction under visible light within 120 min. The enhanced photocatalytic activity might be attributed to the synergistic effect of the effective separation of photogenerated electron-hole and the adsorption of Cr(VI) on the interface of the catalyst. In addition, the possible mechanism of Cr(VI) reduction over CdS/ZnAlO was also proposed. The present work is devoted to synthesise a high efficient and stable photocatalyst for Cr(VI) contaminated wastewater treatment. |
| Databáze: | OpenAIRE |
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