期刊文献+

锐钛矿-金红石混合晶型TiO2降解气相苯 预览

Degradation of gas phase benzene by anatase-rutile mixed phase TiO2
在线阅读 下载PDF
分享 导出
摘要 用溶胶-凝胶法并通过控制煅烧温度合成不同晶相比的混合晶型纳米TiO2,在紫外光光照下降解气相苯。考察了苯初始质量浓度、紫外灯光照强度和催化剂加入量对苯去除率的影响;探究了光催化降解气相苯的动力学特征。结果表明:450℃煅烧制备的催化剂降解苯效率最高,此催化剂金红石相质量分数为6.30%;在苯初始质量浓度为74.39mg/m^3、催化剂加入量为7g、光照强度为2.18klux的最佳条件下反应84min,苯去除率达99.73%;光催化降解率与光照强度之间符合0.5级动力学特征;当催化剂加入量为3g时,单位时间单位质量催化剂降解苯的质量最多;苯的光催化降解反应均符合一级动力学方程。 The mixed phase nano TiO2 with different crystalline phases was synthesized by sol-gel method under different calcination temperature,and was used for degradation of gas phase benzene under ultraviolet light. The effects of initial benzene mass concentration,ultraviolet light intensity and catalyst amount on the benzene removal rate were investigated. The kinetic characteristics of photocatalytic degradation of gaseous benzene were investigated. The results showed that:The catalyst prepared by calcination at 450 ℃ had the highest degradation efficiency of benzene,and the mass fraction of rutile phase of the catalyst was 6.30%;The benzene removal rate reached 99.73% under the optimum conditions of 74.39 mg/m^3 of initial benzene mass concentration,7 g of catalyst addition and 2.18 klux of light intensity and 84 min of reaction time;The relationship between photocatalytic degradation rate and light intensity accorded with the 0.5 level kinetic characteristics;When the catalyst amount was 3 g,the mass of benzene degraded by unit time unit mass catalyst was the most;The photocatalytic degradation of benzene was consistent with first-order kinetic equation.
作者 沈晓玲 田立江 李帅 刘秉坤 李杰 SHEN Xiaoling;TIAN Lijiang;LI Shuai;LIU Bingkun;LI Jie(School of Environment and Spatial Informatics,China University of Mining and Technology,Xuzhou 221008,China)
出处 《化工环保》 CAS CSCD 北大核心 2019年第2期172-177,共6页 Environmental Protection of Chemical Industry
基金 国家自然科学基金项目(51208502)。
关键词 溶胶-凝胶法 煅烧 TIO2 混合晶型 光催化 反应动力学 sol-gel method calcination TiO2 mixed phase benzene photocatalysis reaction kinetics
作者简介 沈晓玲(1994—),男,湖北省松滋市人,硕士生,电话:15062196943,电邮:xls_94@126.com;通讯作者:田立江,电话:13615100688,电邮:tljcumt@cumt.edu.cn。
  • 相关文献

参考文献8

二级参考文献342

共引文献31

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部 意见反馈