负载型纳米TiO_2光催化降解罗丹明B动力学与机理研究  

Kinetics and mechanisms of photocatalysis degradation of rhodamine B by supported nanometer TiO_2

作　　者：祁巧艳[1] 孙剑辉[1] 

机构地区：[1]河南师范大学化学与环境科学学院,河南新乡453007

出　　处：《水资源保护》2006年第2期56-58,75,共4页Water Resources Protection

基　　金：河南省重点科技攻关项目(0323030400)

摘　　要：采用负载型纳米TiO2/AC在流化床反应器中降解罗丹明B染料废水。研究了罗丹明B的光催化降解反应动力学与降解机理。结果表明,负载型纳米TiO2光催化降解罗丹明B过程符合一级动力学方程,降解机理首先是罗丹明B分子发色基团苯氨基、羰基键被破坏,然后是无色中间产物的逐渐降解。Rhodamine B dye wastewater was degraded by supported nanometer TiO2/AC in fluid bed reactor. The photoeatalysis degradation reaction kinetics and degradation mechanisms of rhodamine B were studied. The results indicate that the degradation process conforms to the equation of first order kinetics. According to degradation mechanism, color group aniline and earbonyl of rhodamine B were destroyed, then the colorless intermediary products were degraded gradually.

关 键 词：负栽型纳米TiO2光催化剂 光催化降解 罗丹明B 动力学 

分 类 号：O547.32[理学—物理]