以钛酸四丁酯、三乙醇胺和硫脲为前驱物,采用溶胶-凝胶法合成了氮硫共掺杂纳米TiO2光催化剂,以XRD、DRS、PL、FTIR、SEM、TEM、XPS等手段对所制备的粉体进行了性能表征;并以日光色镝灯为光源,研究了催化剂对光降解甲基橙的活性。结果表明,除了700℃煅烧样品是锐钛矿和金红石晶型共存外,其它掺杂催化剂主要是锐钛矿晶型。不同温度煅烧的催化剂在波长低于550nm的可见光区域内都有高的吸光度。可见光光催化结果表明,500℃煅烧制得的掺杂氧化钛光催化剂表现出最佳的光催化活性,180min内对甲基橙溶液的降解率达到76.7%。 Nitrogen and sulfur co-doped nano-sized TiO2 photocatalyst was synthesized by sol-gel method using tetrabutyl titanate, triethanolamine and thiourea as precursors. XRD, DRS, PL, FTIR, SEM, TEM, XPS and other methods The prepared powders were characterized by means of characterization. The activity of the catalyst on photodegradation of methyl orange was studied by using daylight dysprosium lamp as light source. The results show that, except that the sample calcined at 700 ℃ is the coexistence of anatase and rutile, the other doping catalysts are mainly anatase. Catalysts calcined at different temperatures have high absorbance in the visible range of wavelengths below 550 nm. The results of visible light photocatalysis showed that the photocatalytic activity of doped TiO2 photocatalysts calcined at 500 ℃ showed the best photocatalytic activity, and the degradation rate of methyl orange solution reached 76.7% within 180 min.