光催化
罗丹明B
X射线光电子能谱
材料科学
介电谱
扫描电子显微镜
化学工程
复合数
漫反射红外傅里叶变换
核化学
化学
电化学
催化作用
复合材料
有机化学
电极
物理化学
工程类
作者
Jiawei Liu,Liying Huang,Yeping Li,Lei Yang,Chaobao Wang,Juan Liu,Yanhua Song,Qiwen Tian,Huaming Li
标识
DOI:10.1016/j.jece.2021.106668
摘要
In view of the influence of various pollutants and harmful bacteria in the environment, we designed and constructed BiOI/BiO2−x/BiOBr (IOB) successfully, a double transfer Z-scheme photocatalyst containing oxygen defects. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Transmission electron microscopy (TEM) and Scanning electron microscope (SEM) show that the IOB composite is successfully prepared. XPS and Electron paramagnetic resonance (ESR) techniques verify the oxygen defects in the composite photocatalyst. Photocurrent and Electrochemical impedance spectroscopy (EIS) measurements show the high separation efficiency of photogenerated carriers in the composite photocatalyst. It is found that the best proportion of 35% IOB composite can degrade two pollutants and inactivate two harmful bacteria: 99.6% Rhodamine B (RhB) can be removed within 60 min; 81% tetracycline (TC) could be degraded in 90 min; 100% Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) can be destroyed in 15 min. We also explored the influences of pollutant concentration, photocatalyst dosage, pH value, anion of inorganic compounds and water substrate on pollutant removal. In addition, the photocatalytic degradation under LED light broadens the practical application of photocatalyst. This work not only provides a new idea for the preparation of photocatalysts with high redox ability, but also broadens its application in environment wastewater treatment.
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