Pt/TiO_2光催化氧化还原耦合反应脱除水中无机氮  

Nitrogen Removal via Coupled Ammonia Oxidation and Nitrite Reduction Using Pt/TiO_2 and Photocatalysis

作　　者：李秀婷[1] 柳丽芬[1] 杨凤林[1] 张兴文[1] John Barford 

机构地区：[1]大连理工大学环境与生命学院,大连116023 [2]香港科技大学化工系

出　　处：《无机化学学报》2006年第7期1180-1186,共7页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金资助项目(No.20477006)

摘　　要：本文采用光催化还原法制备了高活性的载铂二氧化钛光催化剂,并用XRF、TEM、XRD对样品进行了表征,考察了pH值、负载Pt的含量、Fe2+的添加及保护气的种类等反应条件对该催化剂活性的影响。结果表明:碱性条件下利于氨氮、亚硝酸氮的耦合脱氮反应,载铂量0.5%时去除效果最佳,Fe2+的加入利于光催化反应,氮气保护下催化剂反应活性更高。Pt/TiO2 photocatalyst was prepared using a photocatalytic reduction method and characterized with XRF, TEM and XRD. Effects of factors such as pH, Pt loading, addition of Fe^2＋ and protection gas on the activity of photocatalyst in nitrogen removal by coupled ammonia oxidation and nitrite reduction were investigated. Results showed that a basic condition was in favor of the coupled ammonia oxidation, nitrite reduction rate. The nitrogen removal rate was the highest with 0.5% Pt loading. Also, the photocatalyst activity was enhanced under protection gas N2 and addition of Fe^2＋ increased the activity of photocatalytic reduction of nitrite.

关 键 词：PT/TIO2 光催化反应 氨氮 亚硝酸氮 

分 类 号：O614.826[理学—无机化学] O614.411[理学—化学]