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以(NH4)2S2O8为氧化剂,运用化学氧化聚合法在TiO2颗粒表面包覆聚苯胺薄膜,通过静电自组装方法制备了复合光催化材料PMOV2/PANI/TiO2,采用傅里叶变换红外光谱(FT-IR)、紫外-可见吸收光谱(UV-Vis)、X-射线粉末衍射(XRD)、热分析(TG-DTG)、扫描电子显微镜(SEM)等手段对其组成、结构及形貌等进行了表征。结果表明,复合材料具有锐钛矿晶型结构,颗粒分布较均匀,结构也较规整,平均粒径约为68.53nm。聚苯胺敏化拓宽了TiO2的光谱响应范围,复合材料在紫外和可见光区都有较强的吸收,提高了光能的利用率和光生载流子的分离效率。在光催化降解染料甲基紫研究中,该复合材料表现出较好的光催化性能。其活性明显高于市售P25(TiO2),PANI/TiO2,PMOV2和PA-NI,降解率达97.1%。
(NH4) 2S2O8 as oxidant, polyaniline films were coated on the surface of TiO2 particles by chemical oxidation polymerization method. The composite photocatalytic material PMOV2 / PANI / TiO2 was prepared by electrostatic self-assembly method and characterized by Fourier transform infrared spectroscopy (FT- IR, UV-Vis, X-ray powder diffraction (XRD), thermal analysis (TG-DTG) and scanning electron microscopy (SEM) Characterization. The results show that the composite has an anatase crystal structure with uniform distribution of particles and a regular structure with an average particle size of about 68.53 nm. Polyaniline sensitization broadens the spectral response range of TiO2. The composite material has strong absorption in the UV and visible region, which improves the utilization of light energy and the separation efficiency of photogenerated carriers. The photocatalytic degradation of dye methyl violet in the study, the composite showed good photocatalytic properties. Its activity was significantly higher than the commercially available P25 (TiO2), PANI / TiO2, PMOV2 and PA-NI, the degradation rate of 97.1%.