Morphology regulated Bi2WO6 nanoparticles on TiO2 nanotubes by solvothermal Sb3+ doping as effective photocatalysts for wastewater treatment
Morphology regulated Bi2WO6 nanoparticles on TiO2 nanotubes by solvothermal Sb3+ doping as effective photocatalysts for wastewater treatment
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DOI：
10.1016/j.electacta.2019.135167
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发表时间：
2020-01
影响因子：
6.6
通讯作者：
Qingyao Wang;Huili Li;Xue Yu;Yao Jia;Yuan Chang;Shanmin Gao
中科院分区：
文献类型：
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作者：
Qingyao Wang;Huili Li;Xue Yu;Yao Jia;Yuan Chang;Shanmin Gao
通过溶剂热Sb3+掺杂获得了纳米片、微玫瑰和微球形貌可控的Bi2WO6颗粒，不同Sb3+掺杂量的Bi2WO6在TiO2纳米管上的沉积影响了太阳光吸收、光电流和光催化能力。玫瑰状的BWO-10光电极在可见光照射下比其他样品表现出更优异的光电流（0.24mA/cm2）、出色的光电压（-0.24V）和界面电阻。 BWO-10光电极还表现出优异的光催化活性，可以去除80.58%、77.23%、99.06%和93.84%的罗丹明B（RhB）、甲基橙（MO）、亚甲基蓝（MB）染料分子和Cr（VI）离子。基于自由基捕获实验，探讨了污染物处理的活性物种和光催化机理。形貌和能带结构的优化是光催化性能大幅提升的主要原因。该工作阐述了金属离子掺杂在半导体光催化剂中的研究进展，为制备具有高光催化性能的废水净化光催化剂提供了有效策略。
Bi2WO6particles with controlled morphologies of nanosheets, microroses and microspheres were obtained by the solvothermal Sb3+doping, and the Bi2WO6deposition on TiO2nanotubes with different Sb3+doping amounts influenced the solar absorption, photocurrent and photocatalytic ability. The rose-like BWO-10 photoelectrode showed more excellent photocurrent (0.24 mA/cm2), outstanding photovoltage (−0.24 V) and interface resistance than those of other samples under visible light irradiation. The BWO-10 photoelectrode also exhibited excellent photocatalytic activity, and 80.58%, 77.23%, 99.06% and 93.84% of rhodamine B (RhB), methyl orange (MO), methylene blue (MB) dye molecules and Cr (VI) ions could be removed. The active species and photocatalytic mechanism for the pollutant treatment were explored based on the free radical capture experiments. The optimization of morphology and energy band structure was the main reason for the dramatical improvement of photocatalytic performances. The work illustrates the advance of metal ion doping in semiconductor photocatalysts, which provides the effective strategy for the preparation of photocatalysts with high photocatalytic performances in wastewater purification.