具有SR-Fenton和光催化活性的Co-TiO_2的制备及其活性  

Preparation and activity of Co-TiO_2 catalyst with both SR-Fenton catalytic and photocatalytic activities

作　　者：吉芳英[1] 刘亭役[1] 陈晴空[1] 邹秋林[1] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045

出　　处：《环境工程学报》2015年第10期4833-4838,共6页Chinese Journal of Environmental Engineering

基　　金：教育部科技创新工程重大项目培育项目(708071)

摘　　要：以溶胶凝胶法制备了Co-TiO2催化剂,采用XRD、XPS、紫外漫反射对催化剂进行了表征,结果表明,一部分Co2+进入了TiO2晶格,另一部分在TiO2表面形成Co3O4。以亚甲基蓝为模拟废水,进行了Co-TiO2催化剂的基于硫酸根自由基的类Fenton(SR-Fenton)和光催化活性测试,且考察了催化剂钴掺杂量、灼烧温度对催化剂活性的影响。结果表明,CoTiO2催化剂为同时具有SR-Fenton和光催化活性的催化剂,Photo/Co-TiO2/过硫酸氢钾为光催化和SR-Fenton反应的协同体系。催化剂最佳钴掺杂量、灼烧温度分别为1%及773 K。Co-TiO2 catalysts were prepared by sol-gel method,the as-prepared catalysts were characterized by X-raydiffraction（ XRD）,X-ray photoelectron spectroscopy（ XPS） and ultraviolet diffuse reflectance spectroscopy technologies. The results indicated that a part of Co2 ＋entered into the TiO2 crystal,and the other part formed Co3O4 on the surface of TiO2. Methylene blue（ MB） was used to study the photocatalytic and SR-Fenton activity of catalysts as model organic pollutant. The influences of the calcined temperature and cobalt amounts on Co-TiO2 catalysts activity were investigated. The results show that Co-TiO2 catalysts possess good SR-Fenton and photocatalytic activity. The photo / Co-TiO2/ oxone hybrid system is a cooperative system of photocatalysis and SR-Fenton reaction. The optimum doping content and calcined temperature are 1% and 773 K,respectively.

关 键 词：Co-TiO2 SR-Fenton 光催化 亚甲基蓝 

分 类 号：X703[环境科学与工程—环境工程]