Hydrothermal synthesis of Nd 3+ -doped heterojunction ms/tz-BiVO 4 and its enhanced photocatalytic performance
| Autor: | Dongmei Jiang, Xiaoxuan Chu, Ruizhi Chen, Weixuan Wang, Xueming Ma, Qingfeng Zhan |
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| Rok vydání: | 2018 |
| Předmět: |
Photoluminescence
Materials science Doping Analytical chemistry 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Hydrothermal circulation 0104 chemical sciences Tetragonal crystal system chemistry.chemical_compound chemistry Scheelite Photocatalysis Hydrothermal synthesis General Materials Science 0210 nano-technology Monoclinic crystal system |
| Zdroj: | Journal of Physics and Chemistry of Solids. 117:28-35 |
| ISSN: | 0022-3697 |
| DOI: | 10.1016/j.jpcs.2018.02.010 |
| Popis: | BiVO 4 photocatalysts with different Nd 3+ doping content were prepared by a hydrothermal method with varied hydrothermal reaction time. The effects of Nd 3+ doping on phase transformation, morphology, chemical valence, optical properties and photocatalytic activities were investigated. With different reaction time, phase transformation from tetragonal zircon (tz-BiVO 4 ) to monoclinic scheelite (ms-BiVO 4 ) could be found, and Nd 3+ doping played a suppressive role in this process. Scanning electron microscopy showed the morphology evolved from irregular structure to rod-like shapes with phase transformation. The photoluminescence induced by Nd 3+ doping could be confirmed by UV–vis diffuse reflectance spectra. Photocatalytic performance tests had been performed under simulated solar conditions and sample with 1 at% Nd 3+ doping and 5 h reaction time showed the best performance (89% degradation rate in 90 min). The pH also showed great influence on morphology and phase transformation of samples. Finally, the phyotocatalytic mechanism and effects of Nd 3+ in phase transformation were discussed. |
| Databáze: | OpenAIRE |
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