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采用空气-水界面自组装法制备TiO2纳米粒子,将其放入AgNO3溶液中浸泡,后在较低温度下进行热处理(400℃),获得Ag-TiO2复合纳米颗粒。利用X射线衍射(XRD)仪、扫描电镜(SEM)、透射电镜(TEM)、紫外可见光谱(UV-Vis)等分析测试手段进行表征。结果表明:复合粒子可以显著提高TiO2颗粒光催化活性。以甲基橙为模拟污染物,经过光催化试验,证实复合纳米粒子具有较好的光催化活性,降解率达到96.25%。
TiO2 nanoparticles were prepared by air-water interface self-assembly method, immersed in AgNO3 solution and then heat-treated at low temperature (400 ℃) to obtain Ag-TiO2 composite nanoparticles. The samples were characterized by XRD, SEM, TEM and UV-Vis. The results show that the composite particles can significantly improve the photocatalytic activity of TiO2 particles. Methyl orange as a simulated pollutant, after photocatalysis, confirmed that the composite nanoparticles have good photocatalytic activity, the degradation rate of 96.25%.