用溶胶-凝胶法制得Zn,Cu共掺杂的TiO2∶SnO2凝胶, 旋转法于玻璃基底镀膜, 制备出Zn,Cu共掺杂的TiO2∶SnO2薄膜, 探讨了掺杂比例、煅烧温度对其结构、形貌和性能的影响。采用XRD、FTIR、FESEM、PL等测试技术对薄膜进行表征, 并考察了其对甲基橙的光催化降解性能。结果表明: 600 ℃时, 薄膜粒子的结晶度较高, 粒径小, 分布均匀, 表面平整且无明显裂痕; 紫外-可见光谱(UV-Vis)表明: 该薄膜在可见光区和紫外区都有很强的吸收; 光催化性能测试表明: 与纯相TiO2对比, 该样品对甲基橙的光催化降解率有较大提高, 在最佳掺杂量比为n(Ti)∶n(Sn)∶n(Zn)∶n(Cu)=10∶3∶1∶1时, 光催化降解率最高。

By using sol-gel method, Zn and Cu co-doped TiO2∶SnO2 gel was prepared and coated on glass substrates by spin coating method. Under the same experimental conditions, the effects of the different doped proportion of Zn and Cu and calcined temperature on the structure, morphology and property of Zn and Cu co-doped TiO2∶SnO2 film were discussed. By using XRD, FTIR, FESEM, PL etc., Zn and Cu co-doped TiO2∶SnO2 film was characterized and its photocatalytic degradation performance on methyl orange was researched. The results demonstrate that the particles of Zn and Cu co-doped TiO2∶SnO2 film calcined at 600 ℃ have high crystallization and small size, and the surface is smooth and no obvious cracks. The absorbance of the film is very high in the visible and ultraviolet region. The degradation experiments under UV light illustrate that the photocatalysis degradation efficiency of the film on methyl orange increases greatly compare with pure TiO2 film, and the degradation rate reaches the highest with the molar ratio of n(Ti)∶n(Sn)∶n(Zn)∶n(Cu)=10∶3∶1∶1.