Ag-H_2Ti_4O_9复合材料的制备以及可见光下对甲苯降解的研究  

Preparation of Ag Doped H_2Ti_4O_9 and the Study on Its Photocatalytic Degradation of Toluene under Visible Light

作　　者：曹昊苏 张荣成[3] 朱长俊 宋夫交 仓辉 许琦 CAO Hao-su;CAO Hao-su 1,2,ZHANG Rong-cheng;ZHU Chang-jun;SONG Fu-jiao;CANG Hui;XU Qi(School of Environmental and Safety Enginnering,Changzhou University,Changzhou 213100,China;School of Environmental Science and Enginnering,Yancheng Institute of Technology,Yancheng 224000,China;School of Medicine and Chemical Enginnering,Lianyungang Technical College,Lianyungang 222006,China)

机构地区：[1]常州大学环境与安全工程学院,常州213100 [2]盐城工学院环境科学与工程学院,盐城224000 [3]连云港职业技术学院医药与化学工程学院,连云港222006

出　　处：《硅酸盐通报》2018年第11期3623-3629,3636,共8页Bulletin of the Chinese Ceramic Society

基　　金：国家重点研发计划子课题(2016YFC0209203);江苏省生态建材与环保装备协同中心(CP201504);江苏省环保厅(2015007)

摘　　要：采用剥离-重堆积法,制备了Ag掺杂的H_2Ti_4O_9复合材料(Ag-H_2Ti_4O_9)。紫外-可见漫反射(UV-Vis DRS)表明Ag-H_2Ti_4O_9光吸收起始波长由350 nm红移至468 nm。由X射线光电子能谱(XPS)分析,材料中Ag以Ag^+和Ag^0存在。N_2吸附-脱附(BET)显示,掺杂后材料的比表面积由33. 7 m^2/g增加到了56. 0 m^2/g。光致发光(PL)表明Ag-H_2Ti_4O_9的光生载流子的复合得到了有效抑制。在300 W氙气灯下,10 min内Ag-H_2Ti_4O_9对甲苯降解效率达到了90%以上。Exfoliation-restacking route was used to prepare precious metal(Ag)icons doped tetratitanata,(Ag-H2Ti4O9).UV-Visible diffuse reflectance spectroscopy(UV-vis DRS)showed that Ag-H2Ti4O9 light absorption starting wavelength red shifted from 350 nm to 468 nm.X-ray photoelectron spectroscopy(XPS)shows that Ag is mainly in the presence of Ag+and Ag 0 in the material.N2 adsorption desorption(BET)show that the specific surface area of the catalyst increase from 33.7 m^2/g to 56.0 m^2/g,which reveales that the treated material has more active parts of the catalytic reaction.Photoluminescence spectra(PL)shows that the recombination of photoconductor has been effectively suppressed and the photocatalytic performance is greatly improved.Under the 300 W xenon lamp,the degradation efficiency of Ag-H2Ti4O9 toluene is 90%in 10 min.

关 键 词：H2Ti4O9 AG 光催化 甲苯 

分 类 号：O643.3[理学—物理化学]