串珠状InNbO_4光催化剂可见光下降解盐酸达克罗宁  

Visible light induced photocatalytic degradation of dyclonine hydrochloride with indium niobate string beads in suspension

作　　者：赵洁[1] 姚秉华[1] 张瑾[1] 余晓皎[1] 路蕾蕾[1] 

机构地区：[1]西安理工大学理学院,西安710048

出　　处：《环境化学》2014年第8期1379-1384,共6页Environmental Chemistry

基　　金：陕西省教育厅科学研究计划项目(2013JK0882);西安理工大学博士启动基金(108211305)资助

摘　　要：采用柠檬酸溶胶-凝胶法制备了串珠状InNbO4光催化剂,利用X射线衍射仪(XRD)、透射电镜(TEM)、紫外-可见漫反射(UV-vis DRS)和比表面积测定仪(BET)等手段对样品进行了表征.以盐酸达克罗宁为模型污染物考察了样品的可见光催化活性.结果表明,合成的串珠状InNbO4为单斜相结构,禁带宽度约为2.91 eV,比表面积为74.1 m2·g-1.串珠状InNbO4具有较高的光催化活性,在可见光下,pH值为7.35,催化剂用量为0.5 g·L-1时,能够有效地降解起始浓度为25 mg·L-1的盐酸达克罗宁溶液,并且降解速率可用一级动力学方程来描述.Indium niobate string beads were prepared by citric acid sol-gel method. The samples were characterized by X-ray diffractometry （ XRD ） , transmission electron microscope （ TEM ） , ultraviolet-visible diffuse reflectance spectroscopy （ UV-Vis） , and Brunauer-Emmett-Teller （ BET） . The photocatalytic properties were evaluated with dyclonine hydrochloride under visible light irradiation. The result shows that indium niobate string beads are monoclinic phase with 2. 91 eV band gap and 74.1 m2·g-1 surface areas. The indium niobate string beads had the best visible light degradation efficiency under the conditions of dyclonine hydrochloride concentration 25 mg·L-1 , indium niobate string beads amount 0.5 g·L-1 and pH 7.35. The kinetic of photocatalytic degradation rate can be described by first order dynamics equation.

关 键 词：InNbO4 柠檬酸溶胶-凝胶法 光催化 盐酸达克罗宁 

分 类 号：X787[环境科学与工程—环境工程]