聚苯胺-Cu_2O-Fe_3O_4复合光催化剂的制备及可见光光催化性能  

FABRICATION OF POLYANILINE-Cu_2O-Fe_3O_4 HYBRID PHOTOCATALYST AND ITS PHOTOCATALYTIC EFFICIENCY UNDER VISIBLE-LIGHT IRRADIATION

作　　者：赵成[1] 孙玉东[1] 李乃瑄[1] 

机构地区：[1]天津理工大学化学与化工学院,天津300384

出　　处：《水处理技术》2015年第7期40-44,共5页Technology of Water Treatment

基　　金：天津市应用基础及前沿技术研究计划(11JCZDJC24400)

摘　　要：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。Ferroferric oxide was coated via liquid phase reduction method, and doped polyaniline was prepared by chemical oxidative polymerization method. Then polyaniline-Cu2O-Fe3O4 hybrid photocatalyst was fabricated by physical adsorption method. The composition, morphology and magnetic property of the as-prepared catalyst was characterized by X-ray diffraction, transmission electron microscope, field emission scanning electron microscopy, Nearinfrared spectrophotometer and vibrating sample magnetometer. The photocatalytic activity of the catalyst was evaluated by p-nitrophenol. The results indicated that the degradation rate of 50 mLp-nitrophenol （mass concentration was 10 mg/L） was 99.8% in the presence of 10 mg catalyst. After five times of degradation, the rate still could reach 89.5%. The mechanism of photocatalytic degradating p-nitrophenol was deduced that the photogenerated holes were transfered to the surface of polyaniline and combined with water molecules and hydroxyl ions to form hydroxyl radicals, which can oxidize p-nitrophenol to small molecular substances.

关 键 词：四氧化三铁 氧化亚铜 聚苯胺 光催化 对硝基苯酚 

分 类 号：TQ031.7[化学工程]