环境工程学报2012，Vol.6Issue(10)：3388-3392,5.
光催化过程中羟基自由基的产生与效能
Production and contribution of hydroxyl radicals in photocatalytic oxidation process
摘要
Abstract
The produciton and contribution of hydroxyl radicals were evaluated using iso-propanol quenching method during photocatalytic oxidaiton of azo dye Orange II.The effects of TiO2(P-25) loading,dosage of iso-propanol,initial Orange II concentration,initial pH condition and natural occurring anionic ions on the contribution percentage of hydroxyl radicals were investigated.It indicated that an increase of TiO2 improved the contribution percentage of hydroxyl radicals and stabilized at 77.6%.The effect of iso-propanol dosage was negligible.An increased Orange II concentration declined the contribution percentage of hydroxyl radicals.Neutral pH condition was favorable for the enhancement of the contribution percentage.Among the natural occurring anionic ions,HCO-3 was the most powerful for the quenching of hydroxyl radicals while F-the weakest for the quenching process.关键词
光催化/异丙醇/羟基自由基/水处理Key words
photocatalysis/iso-propanol/hydroxyl radical/water treatment分类
资源环境引用本文复制引用
李国亭,宋海燕,刘秉涛..光催化过程中羟基自由基的产生与效能[J].环境工程学报,2012,6(10):3388-3392,5.基金项目
国家自然科学基金资助项目 （）
华北水利水电学院高层次人才启动项目 （）
