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

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130 mV，平行制作5支修饰电极测定4.0 mmol/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0.5~10.0 mmol/L,检测限0.2 mmol/L(3S/N)。

Fabrication, Characterization and Application of Polyaniline-Polyelectrolyte Coated CaCO3 Microparticles Core-Shell Structure

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 electrocatalyt...