Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China.
Department of Chemistry and Center for Surface Analysis and Research, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong, China.
J Environ Sci (China). 2013 Oct 1;25(10):2138-49. doi: 10.1016/s1001-0742(12)60279-4.
Porous S-doped bismuth vanadate with an olive-like morphology and its supported iron oxide (y wt.% FeOx/BiVO4-deltaS0.08, y = 0.06, 0.76, and 1.40) photocatalysts were fabricated using the dodecylamine-assisted alcohol-hydrothermal and incipient wetness impregnation methods, respectively. It is shown that the y wt.% FeOx/BiVO4-deltaS0.08 photocatalysts contained a monoclinic scheetlite BiVO4 phase with a porous olive-like morphology, a surface area of 8.8-9.2 m2/g, and a bandgap energy of 2.38-2.42 eV. There was co-presence of surface Bi5+, Bi3+, V5+, V3+, Fe3+, and Fe2+ species in y wt.% FeOx/BiVO4-deltaS0.08. The 1.40 wt.% FeOx/BiVO4-deltaS0.08 sample performed the best for Methylene Blue degradation under visible-light illumination. The photocatalytic mechanism was also discussed. We believe that the sulfur and FeOx co-doping, higher oxygen adspecies concentration, and lower bandgap energy were responsible for the excellent visible-light-driven catalytic activity of 1.40 wt.% FeOx/BiVO4-deltaS0.08.
采用十二胺辅助醇水热法和初始湿浸渍法分别制备了具有橄榄状形貌的多孔 S 掺杂五氧化二铋及其负载的氧化铁（y wt.% FeOx/BiVO4-deltaS0.08，y = 0.06、0.76 和 1.40）光催化剂。结果表明，y wt.% FeOx/BiVO4-deltaS0.08 光催化剂包含具有多孔橄榄状形貌的单斜白钨矿 BiVO4 相，比表面积为 8.8-9.2 m2/g，带隙能为 2.38-2.42 eV。y wt.% FeOx/BiVO4-deltaS0.08 中存在表面 Bi5+、Bi3+、V5+、V3+、Fe3+和 Fe2+物种。在可见光照射下，1.40 wt.% FeOx/BiVO4-deltaS0.08 对亚甲基蓝的降解性能最佳。还讨论了光催化机理。我们认为，硫和 FeOx 共掺杂、较高的氧吸附物种浓度和较低的带隙能是 1.40 wt.% FeOx/BiVO4-deltaS0.08 具有优异可见光驱动催化活性的原因。
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