中文摘要：

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、Fe^2＋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，Fe^2＋的加入利于光催化反应，氮气保护下催化剂反应活性更高。

英文摘要：

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.