Preparation of UiO-66/BiVO4 composite photocatalyst and its photodegradation of tetracycline
QI Yu-wen1, WEI Li-hong1, SHI Dong-ni1, JIANG Jin-yuan2, YAN Zheng1
1. College of Energy and Environment, Shenyang Aerospace University, Shenyang 110122, China; 2. Chinese Research Academy of Environmental Sciences, Beijing 100012, China
Abstract：The UiO-66/BiVO4 composite photocatalytic material was successfully preparated by a two-step solvothermal method, and its photocatalytic degradation performance for tetracycline (TC) was investigated. Under simulated visible light, when the amount of substance about zirconium(Zr):bismuth(Bi) was 2:1, the photolysis effect of TC was the best (85.8%). Its total removal rate of TC was increased by 27.1% and 23.5% compared to pure UiO-66 and pure BiVO4, respectively. The degradation rate was 47.9times that of pure BiVO4. The structure, morphology and composition of the prepared nano-photocatalyst by X-ray diffractometer (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible diffuse reflection (UV-vis DRS) and photoelectric performance characterization analysis. The results showed that UiO-66 and BiVO4 were tightly combined to form Ⅱ heterojunction. The improvement of composite material performance was attributed to improvements in various aspects, including specific surface area, photogenerated carrier separation rate, and pore structure.
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