膨润土负载BiVO_4复合材料的制备及可见光催化性能  

Preparation of bentonite/BiVO_4 photocatalyst and its characterization

作　　者：张进[1] 朱媛[1] 李一清[1] 

机构地区：[1]南京晓庄学院环境科学学院,南京211171

出　　处：《化工新型材料》2015年第12期70-72,共3页New Chemical Materials

基　　金：中国博士后基金(2012M511254);南京晓庄学院科研项目(2013NXY40)

摘　　要：采用水热法制备了膨润土负载的膨润土/BiVO_4复合材料,借助XRD、IR、SEM、DRS等表征了掺杂膨润土前后的BiVO_4结构、光化学性质的变化。膨润土/BiVO_4复合材料保持了母体BiVO_4的单斜结构,SEM结果证实膨润土负载在钒酸铋的表面,DRS结果显示膨润土负载的样品在可见光区的吸收增强。研究表明,10%膨润土/BiVO_4样品的光催化活性最高,可见光照射300min对亚甲基蓝溶液的降解率达92%,与纯BiVO_4相比,其光降解率提高了1.04倍。In order to improve the efficiency of photocatalysis of BiVO4,bentonite was loaded to modify BiVO4.The bentonite/BiVO4 composite photocatalyst was prepared by hydrothermal method.The photocatalyst was characterized by Xray diffraction（XRD）,infrared spectroscopy（IR）,scanning electron microscopy（SEM）,and UV-Vis diffuse reflectance spectroscopy（DRS）.The DRS diagrams demonstrated that the catalysts showed absorption in the visible region between550 and 800nm.The photocatalytic activity of catalysts toward methylene blue（MB）dye solution was studied under visible-light irradiation.The results revealed that the introduction of bentonite can improve photocatalytic performance.The highest activity was obtained by the sample with a loading bentonite concentration of 10wt%.And the degradation rate of MB with 10% bentonite/BiVO4 composite was 92%,which was 1.04 times higher than that of pure BiVO4.

关 键 词：钒酸铋 膨润土 可见光 光催化 

分 类 号：O643.36[理学—物理化学]