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以垂直蒸发沉积法制备的聚苯乙烯(PS)胶态晶体为模板,采用溶胶–凝胶法制备多孔ZnO和TiO_2薄膜,分别考察其对罗丹明B(Rh B)溶液的光催化降解效果。使用扫描电子显微镜观察PS胶态晶体以及多孔ZnO和TiO_2薄膜的形貌,以紫外–可见吸收光谱仪表征光催化降解效果。结果表明:PS微球分散液浓度为0.025%时,胶态晶体为单层和多层结构,随着浓度增加至0.100%,胶态晶体呈现完善的多层结构;PS微球分散液浓度为0.100%、ZnO溶胶浓度为0.3 mol/L制备的多孔ZnO薄膜对Rh B降解效果较好;PS微球分散液浓度为0.025%、TiO_2溶胶浓度为0.1 mol/L获得的多孔TiO_2薄膜对Rh B降解效果较好。多孔ZnO薄膜对Rh B的降解效果优于多孔TiO_2薄膜。
Polystyrene (PS) colloidal crystals prepared by vertical evaporation deposition were used as template to prepare porous ZnO and TiO_2 films by sol-gel method. The photocatalytic degradation of rhodamine B (RhB) solution was investigated. The morphologies of PS colloidal crystals and porous ZnO and TiO_2 films were observed by scanning electron microscopy. The photocatalytic degradation was characterized by UV-Vis absorption spectroscopy. The results show that when the concentration of PS microspheres dispersion is 0.025%, the colloidal crystals are single layer and multi-layer structure. With the concentration increasing to 0.100%, the colloidal crystal presents a perfect multi-layer structure; the concentration of PS microspheres dispersion is 0.100%, and the ZnO sol concentration of 0.3 mol / L, the degradation of Rh B was better. The porous TiO 2 film with PS dispersion concentration of 0.025% and TiO 2 sol concentration of 0.1 mol / Degradation is better. The degradation of Rh B by porous ZnO thin films is better than that of porous TiO 2 films.