BiVO_(4)/GO复合光催化剂的制备及催化性能研究  

Fabrication of BiVO_(4)/GO Composites Photocatalysts and Their Photocatalytic Property

作　　者：赵瑨云 徐婕 苏丽鳗 刘俊劭 胡家朋 刘瑞来 ZHAO Jinyun;XU Jie;SU Liman;LIU Junshao;HU Jiapeng;LIU Ruilai(Fujian Provincial Key laboratory of Eco-Industrial Green Technology,College of Ecological and Resources Engineering,Wuyi University,Wuyishan 354300,China)

机构地区：[1]福建省生态产业绿色技术重点实验室,武夷学院生态与资源工程学院,福建武夷山354300

出　　处：《水处理技术》2021年第10期62-65,共4页Technology of Water Treatment

基　　金：福建省自然科学基金(2018J01518,2018J05092,2019J01829,2019J01830);南平市基金(2019J06)。

摘　　要：利用水热法一步制备了钒酸铋/氧化石墨烯(BiVO_(4)/GO)复合光催化剂,通过扫描电镜、红外光谱、X-射线粉末衍射和N2吸附-脱附曲线对复合催化剂结构和形貌进行表征,并将其应用于活性红印染废水的处理研究,探讨其催化活性。扫描电镜观察到复合催化剂中纳米BiVO_(4)颗粒聚集在GO片层表面。GO的加入并未改变BiVO_(4)晶型结构。BiVO_(4)/GO复合催化剂的最可几孔径和比表面积分别为11.66 nm和23.33 m^(2)/g。BiVO_(4)/GO对活性红的降解效率高达98.97%,循环使用5次后,降解率仍达到89.13%,说明该催化剂具有良好的循环使用活性。最后采用Langmuir-Hinshelwood(L-H)一级动力学模型方程拟合催化降解过程,相关系数R2均大于0.92,说明L-H一级动力学模型方程非常适合于拟合该催化动力学过程。Bismuth vanadate/graphene oxide(BiVO_(4)/GO) composites photocatalysts were synthesized by one-step hydrothermal method. The structure and morphology of BiVO_(4)/GO composites photocatalysts can well be analyzed via scanning electron microscope, fourier transforms infrared spectroscopy, X-Ray powder diffraction and N2 adsorption-desorption isotherms. The photocatalytic activity of BiVO_(4)/GO composites photocatalysts toward the decomposition of Reactive red was investigated and its catalytic activity was discussed. The BiVO_(4) nanoparticles aggregated on the surface GO lamella in the catalysts were observed by SEM. The addition of GO did not change the crystal structure of BiVO_(4). The most pore size and specific surface area of BiVO_(4)/GO composites photocatalysts were 11.66 nm and 23.33 m^(2)/g, respectively. The degradation efficiency of Reactive red on BiVO_(4)/GO was as high as 98.97%. The degradation efficiency still reached 89.13% after five cycles, indicated that the catalyst had good recycling activity.Finally, Langmuir-Hinshelwood first-order kinetic model equation was used to fit the catalytic degradation process, and the correlation coefficients R2 were all greater than 0.92, indicated that L-H first-order kinetic model equation was very suitable for fitting the photocatalytic kinetic process.

关 键 词：钒酸铋 氧化石墨烯 水热法 光催化 活性红 

分 类 号：O643.1[理学—物理化学]