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通过液相还原法制备Cu2O包覆Fe3O4磁微球,利用氧化聚合法制备掺杂态聚苯胺,再通过物理吸附法制备出聚苯胺-Cu2O-Fe3O4复合光催化剂。使用X-射线衍射仪、透射电子显微镜、扫描电子显微镜、近红外可见分光光度计和振动样品磁强计对催化剂的组成、形貌及磁性进行表征;以对硝基苯酚作为底物,考察了催化剂光降解性能。结果表明,10 mg催化剂降解50 m L对硝基苯酚溶液(质量浓度10 mg/L)的效率可达99.8%;经过5次循环使用,催化效率仍可以达到89.5%。根据催化剂的光催化原理和捕获剂实验的结果,推测光催化降解对硝基苯酚的机理为,光生空穴由Cu2O转移到聚苯胺表面并与水分子和OH-结合生成羟基自由基,将对硝基苯酚氧化为小分子物质。
Cu2O-coated Fe3O4 magnetic microspheres were prepared by liquid-phase reduction method, and doped polyaniline was prepared by oxidative polymerization. Polyaniline-Cu2O-Fe3O4 composite photocatalyst was prepared by physical adsorption. The composition, morphology and magnetic properties of the catalyst were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, near-infrared visible spectrophotometer and vibrating sample magnetometer. With p-nitrophenol as the substrate, Photocatalytic degradation properties. The results showed that the efficiency of 10 mg catalyst degradation of 50 m L p-nitrophenol solution (mass concentration 10 mg / L) was 99.8%. After 5 cycles, the catalytic efficiency could still reach 89.5%. According to the photocatalytic principle of the catalyst and the result of the capture experiment, it is speculated that photocatalytic degradation of p-nitrophenol is caused by the transfer of photogenerated holes from Cu2O to the surface of polyaniline and the formation of hydroxyl radicals by water molecules and OH-. Nitrophenol oxidation to small molecules.