高氯酸掺杂聚苯胺吸附Cr(Ⅵ)的机理研究  

Research on Adsorption Mechanism of Polyaniline Doped with Perchloric Acid for Cr(Ⅵ)

作　　者：曹彤[1] 蒋巧姣 蒋松秀 徐畅[1] 郑萌萌[1] 陈忠平[1] 

机构地区：[1]安徽科技学院化学与材料工程学院,安徽凤阳233100

出　　处：《安徽科技学院学报》2017年第2期68-72,共5页Journal of Anhui Science and Technology University

基　　金：国家级大学生创新创业训练计划项目(201610879008)

摘　　要：目的:研究聚苯胺对Cr(Ⅵ)的吸附机理。方法:采用扫描电镜、红外光谱、紫外-可见光谱、X射线衍射等表征手段比较高氯酸掺杂的聚苯胺对Cr(Ⅵ)吸附前后形貌和结构的变化,并通过动力学、吸附等温曲线等进行了线性拟合。结果:高氯酸掺杂的聚苯胺在吸附Cr(Ⅵ)前后形貌和结构都有所改变,其吸附过程能很好地符合准二级反应动力学方程和Freundlich等温吸附模型。结论:吸附过程中有氧化还原反应的发生,是物理吸附和化学吸附共同作用的结果。Objective： To study adsorption mechanism of polyaniline（ PANI） doped with Perchloric Acid for Cr（ Ⅵ）. Methods： The change of morphology and structure about PANI doped with Perchloric Acid were characterized by scanning electron microscopy（ SEM）,Fourier transform infrared spectra（ FTIR）,ultraviolet-visible（ UV-vis） and wide angle X-ray diffraction（ XRD）. Linear fitting equation was done by kinetics and adsorption isotherms. Results： The morphology and structure of PANI doped with Perchloric Acid were changed after Cr（ Ⅵ） was adsorpted. Isotherm data fit well to the Freundlich model and pseudo-second-order kinetic model.Conclusion： There was oxidation-reduction reaction in the adsorption course and it was the result of joint action of physical adsorption and chemical adsorption.

关 键 词：高氯酸 聚苯胺 Cr(Ⅵ) 吸附机理 

分 类 号：O632.63[理学—高分子化学]