超声协同微球型Bi2O2CO3降解罗丹明B的研究  

Research on sonocatalytic degradation of Rhodamine B by Bi2O2CO3 particles under ultrasonic irradiation

作　　者：杜栋栋 王成会[1] 朱刚强[1] 邓青松 李雁鹏[1] 孙永洁 DU Dong-dong;WANG Cheng-hui;ZHU Gang-qiang;DENG Qing-song;LI Yan-peng;SUN Yong-jie(School of Physics and Information Technology,Shaanxi Normal University,Xi’an 710062,Shaanxi,China)

机构地区：[1]陕西师范大学物理学与信息技术学院

出　　处：《声学技术》2019年第3期301-306,共6页Technical Acoustics

基　　金：国家科学自然基金(11204168、11474191);中央高校基本科研业务费专项资金(GK201603102);陕西师范大学创新创业项目基金资助

摘　　要：Bi2O2CO3是一种Bi类半导体催化剂,文章研究了它的超声催化性能。首先,采用水热法制备了微球型的Bi2O2CO3,利用X射线衍射(X-ray Diffraction,XRD)、扫描电子显微镜(Scanning Electron Microscope,SEM)、紫外-可见漫反射光谱对样品的晶体结构、微观形貌、光学特性进行了表征。然后,以罗丹明B(RhB)作为模型污染物,通过研究超声催化降解罗丹明B来评测Bi2O2CO3的超声催化性能。研究了催化剂的浓度(Ccatalytic)、初始罗丹明B染料的浓度(CRhB)和超声功率(P)等实验因素对超声催化降解效率的影响。得出在Ccatalytic=3g·L^-1,CRhB=10mg·L^-1和P=400W条件下降解罗丹明B的效率最高,其最高降解效率可以达到91.7%。Bi2O2CO3 is a kind of Bi semiconductor catalyst, in this paper, the sonocatalytic performance of Bi2O2CO3 is studied. The Bi2O2CO3 particles are synthesized by the hydrothermal method, and their crystal structures, morphologies and optical properties are characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and ultraviolet- visible diffuse reflectance spectroscopy (UV-Vis DRS). Then, by taking Rhodamine B (RhB) as a model pollutant, the sonocatalytic performance of Bi2O2CO3 is evaluated in terms of the degradation of Rhodamine B under ultrasonic irradiation. The effects of various experimental factors, such as catalyst dosage (Ccatalytic), initial RhB concentration (CRhB) and ultrasonic power (P), on the efficiency of sonocatalysis degradation are investigated. The optimum conditions for sonocatalytic degradation of Rhodamine B are: Ccatalytic = 3 g·L-1, CRhB = 10 mg·L-1 and P = 400 W. The percentage degradation of Rhodamine B after 90 minutes of sonocatalysis is 91.7%.

关 键 词：Bi2O2CO3 罗丹明B 超声催化 降解机理 

分 类 号：TB559[理学—物理]