College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, People's Republic of China.
Talanta. 2012 Jan 30;89:136-41. doi: 10.1016/j.talanta.2011.12.002. Epub 2011 Dec 8.
A simple and effective strategy was proposed for synthesis of AuNPs@polyaniline (AuNPs@PANI) core-shell nanocomposites. AuNPs@PANI nanocomposites were prepared by one-step chemical oxidative polymerization of aniline using chloroaurate acid as the oxidant and AuNPs as the seeds. The synthesized AuNPs@PANI nanocomposites were characterized with transmission electron microscope and UV-vis absorption spectra. Cyclic voltammetric experiments indicated that AuNPs@PANI nanocomposites showed excellent electroactivity in neutral and even alkaline solution. The obtained AuNPs@PANI nanocomposites-modified electrode was fabricated to simultaneously determine dopamine (DA) and ascorbic acid (AA) by differential pulse voltammetry. The separation between the two peak potentials of DA and AA oxidation is 236 mV. The catalytic peak currents were linearly with the concentrations of DA and AA in the range of 10-1700 and 20-1600 μM with correlation coefficients of 0.9997 and 0.9998, respectively. The detection limits for DA and AA were 5 and 8 μM, respectively.
提出了一种简便有效的策略，用于合成 AuNPs@聚苯胺（AuNPs@PANI）核壳纳米复合材料。通过使用氯金酸作为氧化剂和 AuNPs 作为种子的一步化学氧化聚合反应制备了 AuNPs@PANI 纳米复合材料。用透射电子显微镜和紫外-可见吸收光谱对合成的 AuNPs@PANI 纳米复合材料进行了表征。循环伏安实验表明，AuNPs@PANI 纳米复合材料在中性甚至碱性溶液中表现出优异的电活性。制备了 AuNPs@PANI 纳米复合材料修饰电极，通过差分脉冲伏安法同时测定多巴胺（DA）和抗坏血酸（AA）。DA 和 AA 氧化的两个峰电位之间的分离为 236 mV。DA 和 AA 的催化峰电流与浓度在 10-1700 和 20-1600 μM 范围内呈线性关系，相关系数分别为 0.9997 和 0.9998。DA 和 AA 的检测限分别为 5 和 8 μM。
