应用化学 ›› 2011, Vol. 28 ›› Issue (01): 22-26.DOI: 10.3724/SP.J.1095.2010.00138

• 研究论文 • 上一篇    下一篇

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

董文举*,席君兰,路雅惠,李中华,张培培   

  1. (河南师范大学化学与环境科学学院 新乡 453007)
  • 收稿日期:2010-03-09 修回日期:2010-04-07 出版日期:2011-01-10 发布日期:2011-01-10
  • 通讯作者: 董文举,副教授; Tel:0373-3326335; E-mail:xijunlan000@163.com; 研究方向:电化学和纳米材料
  • 基金资助:
    国家自然科学基金(20905021,20805011)资助项目

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

DONG Wen-Ju*, XI Jun-Lan, LU Ya-Hui, LI Zhong-Hua, ZHANG Pei-Pei   

  1. (School of Chemistry and Environmental Science,Henan Normal University,Xinxiang 453007)
  • Received:2010-03-09 Revised:2010-04-07 Published:2011-01-10 Online:2011-01-10
  • Contact: Wenju dong

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)。

关键词: 碳酸钙, 聚电解质, 聚苯胺, 核壳结构, 多巴胺

Abstract:

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(3S/N).

Key words: CaCO3, polyelectrolyte, polyaniline, core-shell structure, dopamine

中图分类号: