【摘要】 以氨水和草酸铵为双N源,用原位沉淀技术制备了高活性N修饰TiO2可见光催化剂.通过N2吸脱附等温线、XRD、UV-Vis、XPS和IR波谱等技术对催化剂结构和光谱性质进行了系统表征.同时以亚甲基蓝水溶液的可见光降解为模型反应对催化剂的活性进行了评价.结果表明:由双N源合成的N-TiO2催化剂,氨水和草酸铵的协同作用有利于N进入TiO2晶格,其活性要高于单N源及后修饰的N-TiO2催化剂.更多还原

【Abstract】 A highly active N-doped TiO2 visible light photocatalyst was prepared by an improved precipitation method.Ammonium oxalate and ammonium hydroxide were used as the nitrogen resources and worked as in-situ release and pre-addition of the N elements to modified TiO2,respectively.The prepared photocatalysts were characterized by the BET,XRD,UV-vis,XPS and IR spectrum.The model reaction of degradation methylene blue was used to test the photocatalytic activity of photocatalyst under visible light.The results showed that the TiO2 photocatalyst modified by the two N sources displayed higher photocatalytic activity than the single N source or post-modifying TiO2 photocatalysts,due to that the two N sources were beneficial to make N atoms into the TiO2 lattice.更多还原