KH550改性聚苯胺/氧化锌的制备及性能研究  

Study on the preparation and properties of KH550modified polyaniline /zinc oxide

作　　者：安予生 李村[1] 吴振玉[1] 朱维菊[1] 

机构地区：[1]安徽大学化学化工学院,安徽合肥230601

出　　处：《安徽大学学报（自然科学版）》2014年第4期79-88,共10页Journal of Anhui University(Natural Science Edition)

基　　金：安徽省自然科学基金资助项目(11040606M33);安徽省高校自然科学研究项目(KJ2013A013)

摘　　要：直接沉淀法制备棒状和颗粒状纳米氧化锌,然后水热法制备改性氧化锌,通过乳液聚合的方法制备PANI/ZnO纳米复合材料,经过XRD、扫描电镜、透射电镜、红外光谱仪、荧光分光光度计、紫外可见分光光度计表征样品的结构和性能.XRD结果表明,改性聚苯胺/氧化锌的衍射峰均与氧化锌的衍射峰一致,而未改性的复合材料的XRD出现许多非氧化锌的衍射峰;透射电镜结果显示,改性聚苯胺/氧化锌结构中,聚苯胺已经成功包覆在氧化锌颗粒的表面,而未改性的复合材料中,聚苯胺则是以片状结构出现;红外结果显示,改性聚苯胺/氧化锌的结构中已经存在硅烷耦联剂的吸收峰;荧光结果表明,改性之后的聚苯胺/氧化锌的荧光发射强度弱于未改性的;紫外可见吸收光谱的结果显示,改性的聚苯胺/氧化锌不仅在可见光区的吸收有明显提升,在紫外光区的吸收也强于未改性的聚苯胺/氧化锌;光催化效果表明,改性聚苯胺/氧化锌在40 min时的降解率达到90%,降解效果甚至强于纯的氧化锌,而未改性的聚苯胺/氧化锌则最少需要60 min降解率才能达到90%.The rod and powder zinc oxide （ ZnO ） samples were prepared through direction precipitation and modified by KH550, then the polyaniline （ PANI） / ZnO nanocomposite were prepared by emulsion polymerization. ZnO nanoparticles and nanocomposite samples were analyzed and characterized by X - ray diffraction （ XRD ）, scanning electronic microscope （ SEM ）, transmission electronic microscope （ TEM）, fourier transformed infrared spectroscopy （ FTIR）, fluorescence, and UV-Vis spectrophotometer. The XRD results showed that the diffraction peaks of modified nanocomposite （ MN） agreed with the pure ZnO while the XRD results of unmodified nanocomposite（UMN） showed some diffraction peaks were not in accordance with the pure ZnO. The results of TEM showed that the polyaniline of MN had already coated on the surface of ZnO nanoparticles while the polyaniline of UMN existed as sheet -like. FTIR results showed that the silane coupling agent existed in MN. The results of fluorescence showd that the fluorescence intensity of MN was weaker than UMN. UV-Vis results showed that the absorption intensity of MN was enhanced in the visible light region compared with ZnO and enhanced in ultraviolet region relative to the UMN. The test of photocatalysis degradation results showed that MN could degrade 90% of methylene blue at 40 min which was even better than the pure zinc oxide while UMN would spend 60 min at least to attain the same effect.

关 键 词：纳米材料 硅烷耦联剂 改性 乳液聚合 光催化 

分 类 号：O614.24[理学—无机化学]