摘要：采用溶胶-凝胶法制备WO₃-TiO₂纳米复合材料,并用透射电镜和X射线衍射对所制备材料进行表征和分析。以WO₃-TiO₂纳米材料为光催化剂对甲基橙进行光催化降解处理,研究WO₃的掺杂量、煅烧温度、光照时间等因素对甲基橙降解率的影响。结果表明:在紫外灯照射下,使用w(WO₃)=3%、550℃下煅烧得到的WO₃-TiO₂纳米复合粉体0.02 g,甲基橙溶液20 mL(ρ=5 mg/L,pH=4),光催化3 h后,甲基橙降解率达到94.93%。

关键词：纳米材料；光催化；降解

Abstract：WO₃-TiO₂ nanometer particles were prepared using a sol -gel process （the mass fraction of WO₃ was 1%， 3%， 7% respectively）. The photocatalytic activity of WO₃-TiO₂ was analyzed and characterized using XRD spectra and TEM. WO₃-TiO₂ nanometer photocatalyst was used to degrade methyl orange and research the effect of WO₃ dosage doping amount， calcined temperature， the illumination time on the degradation rate of methyl orange. The results showed that the decolorizing rate of methyl orange reached 94.93% using WO₃-TiO₂ calcined under 550 ℃ as the photocatalyst when the mass fraction of WO₃ was 3% in the composition of nanometer particles， the mass of catalyst was 0.02 g， the initial concentration of methyl orange was 5 mg/L， pH=4， and the illumination time was 3 h. 

Keywords：nanometer particles； photocatalytic activity； degradation