UiO-66/BiVO_(4)复合光催化剂的制备及其对四环素的光解

Preparation of UiO-66/BiVO_(4)composite photocatalyst and its photodegradation of tetracycline

通过两步溶剂热法成功制备了UiO-66/BiVO_(4)复合光催化材料,考察其对四环素(TC)的光催化降解性能.在模拟可见光下,当锆(Zr):铋(Bi)物质的量投料比为2:1时,对TC的光解效果最好(85.8%).对TC的总去除率分别比纯UiO-66和纯BiVO_(4)提高27.1%和23.5%,降解速率是纯BiVO_(4)的47.9倍.通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)、X射线光电子能谱(XPS)、紫外可见漫反射(UV-vis DRS)等对所制备的纳米光催化剂进行结构、形貌、组成及光电性能表征分析.结果表明:UiO-66与BiVO_(4)紧密结合形成Ⅱ型异质结,复合材料性能的提升归因于比表面积的和光生载流子分离率的提升及孔隙结构的改善.

The UiO-66/BiVO_(4)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 BiVO_(4),respectively.The degradation rate was 47.9times that of pure BiVO_(4).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 BiVO_(4)were tightly combined to formⅡheterojunction.The improvement of composite material performance was attributed to improvements in various aspects,including specific surface area,photogenerated carrier separation rate,and pore structure.