复合酸掺杂的聚苯胺对Cr(Ⅵ)的吸附性能  

Adsorption properties of polyaniline doped with mixed acids for Cr(Ⅵ)

作　　者：徐惠[1] 张宝骞[1] 陈泳[1] 翟钧[1] 张俊龙[1] 吴军霞[1] 

机构地区：[1]兰州理工大学石油化工学院,兰州730050

出　　处：《功能材料》2014年第22期22046-22050,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51062011)

摘　　要：采用原位聚合法合成了盐酸与对甲基苯磺酸(TSA)共掺杂的聚苯胺,研究了不同比例复合酸掺杂对聚苯胺的微观形貌和对水中重金属Cr(Ⅵ)吸附性能的影响。通过扫描电镜(SEM)、红外光谱(FTIR)对掺杂态聚苯胺进行了研究与表征,考查了影响吸附容量的主要因素(pH值、吸附时间、温度、溶液浓度)。研究结果表明,室温下对甲苯磺酸和盐酸的摩尔比为9∶1时,掺杂态的聚苯胺形成了较疏松、规则的纳米棒状结构,其对Cr(Ⅵ)的吸附过程符合Langmuir等温吸附模型和二级动力学模型,在50℃、溶液pH值为2时,最大吸附容量为413.22mg/g。The polyaniline co-doped with hydrochloric acid (HCl)and p-toluenesulfonic acid (TSA)was pre-pared by in-situ polymerization method.The properties of the synthesized polyaniline were studied and charac-terized by scanning electron microscopy (SEM)and Fourier transform infrared (FT-IR).The effects of various experimental conditions such as pH,time,temperature and initial metal ion concentration were studied.The results show that,at the room temperature,the mol concentration ratio of TSA to HCl was 9∶1 ,the morphol-ogy of the synthesized doped polyaniline was loose nanorods.Isotherm data fits well to the Langmuir model and second-order kinetic model.The maximum adsorption capacity for Cr(Ⅵ)was 413.22 mg/g at pH 2 and 50 ℃.

关 键 词：聚苯胺 复合酸 吸附 Cr(Ⅵ) 

分 类 号：TB332[一般工业技术—材料科学与工程]