核壳结构聚苯胺-聚电解质-碳酸钙微球复合材料的制备、表征和应用  

Fabrication,Characterization and Application of Polyaniline-Polyelectrolyte Coated CaCO_3 Microparticles Core-Shell Structure

作　　者：董文举[1] 席君兰[1] 路雅惠[1] 李中华[1] 张培培[1] 

机构地区：[1]河南师范大学化学与环境科学学院,新乡453007

出　　处：《应用化学》2011年第1期22-26,共5页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(20905021;20805011)资助项目

摘　　要：在包裹了聚电解质的碳酸钙微球上原位聚合苯胺,形成导电性良好的聚苯胺-聚电解质-碳酸钙(PAN/(PEs)6/CaCO3)微球。采用扫描电子显微镜研究了聚电解质层对碳酸钙微球形貌的影响,以及苯胺单体加入量对碳酸钙-聚电解质-聚苯胺导电复合材料形貌的影响。并用红外光谱和紫外-可见光谱等进行了结构表征。该复合材料有良好的电催化活性,将其滴涂在玻碳电极上,修饰电极对多巴胺氧化显示了较强的催化能力,与碳酸钙修饰电极相比,其氧化峰电位负移了130mV,平行制作5支修饰电极测定4.0mmol/L多巴胺,相对标准偏差为4.2%。该复合材料制备简单、重现性良好,可以构建测定多巴胺的传感器。线性范围0.5～10.0mmol/L,检测限0.2mmol/L(3S/N)。Polyaniline（PAN） was in-situ formed around calcium carbonate（CaCO3） microparticles previously stabilized with polyelectrolyte layers（PEs）,generating PAN/（PEs） 6/CaCO3 hybrid microparticles.The effects of PEs and concentration of aniline monomer on the stability and morphology of the hybrid microparticles were studied.The obtained hybrid microparticles were characterized by SEM,FT-IR,UV-Vis,etc.Furthermore,the hybrid microparticles were deposited on glassy carbon electrode,which displayed high electrocatalytical activity toward the oxidation of dopamine（DA）.The oxidized peak potential was negatively shifted with a value of 130 mV,compared with that using pure CaCO3 microparticles.The modified electrode showed good reproducibility,and the relative standard deviation（RSD） was estimated to be about 4.2% in 4.0 mmol/L DA aqueous solution（n =5）.The obtained hybrid microparticles have great potential in construction of biosensors.The linear range was in the range of 0.5~10.0 mmol/L,with the detection limit of 0.2 mmol/L（3 S/N）.

关 键 词：碳酸钙 聚电解质 聚苯胺 核壳结构 多巴胺 

分 类 号：O652.7[理学—分析化学]