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采用硬脂酸法制备出 TiO2/SnO2复合光催化剂，用 XRD、 TEM等手段对所得粉体进行表征；以甲基橙溶液为模拟废水，考察 TiO2/SnO2光催化剂活性。结果表明：与纯 TiO2相比， TiO2/SnO2的光催化活性有较大提高，当 SnO2的掺入量为摩尔比 5.6％时催化活性最高。
The TiO2 / SnO2 composite photocatalyst was prepared by stearic acid method, and the obtained powder was characterized by XRD and TEM. The methyl orange solution was used as simulated wastewater to investigate the photocatalytic activity of TiO2 / SnO2. The results showed that the photocatalytic activity of TiO2 / SnO2 increased greatly compared with that of pure TiO2, and the catalytic activity was the highest when the molar ratio of SnO2 was 5.6%.