以钛酸四正丁酯为前驱体,硝酸铵和钨酸铵为掺杂源,利用低温溶胶法直接制备了纳米级钨、氮共掺杂二氧化钛粉体。通过XRD、SEM、IR、XPS、GTA等测试手段对样品进行表征,结果表明:共掺杂TiO2粉体为锐钛矿型,呈球状颗粒,粒径为8.9 nm,600℃内稳定性好,禁带宽度2.86 eV,光响应迁移到可见光范围。以氙灯模拟太阳光降解甲基橙溶液,光照60 min,光催化剂粉体的降解率达到94%以上,与P25相比有明显提高,具有良好的光降解性能。 Using tetra-n-butyl titanate as precursor, ammonium nitrate and ammonium tungstate as doping source, nano-sized tungsten and nitrogen co-doped titanium dioxide powders were prepared directly by low temperature sol-gel method. The samples were characterized by XRD, SEM, IR, XPS and GTA. The results show that the co-doped TiO2 powder is anatase, spherical and has a particle size of 8.9 nm, good stability at 600 ℃, With a bandgap of 2.86 eV, the light response migrates to the visible range. The photodegradation rate of methyl orange solution was over 94% with light irradiation of xenon lamp simulated sunlight for 60 min, which was obviously improved compared with that of P25 and had good photodegradation performance.