| 镍纳米粒子修饰碳糊电极直接电催化鸟嘌呤的研究 |
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| 引用本文： | 李卫娟,罗世忠.镍纳米粒子修饰碳糊电极直接电催化鸟嘌呤的研究[J].分析测试学报,2010,29(4). |
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| 作者姓名： | 李卫娟 罗世忠 |
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| 作者单位： | 青岛科技大学,化学与分子工程学院,山东,青岛,266042 |
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| 摘 要： | 将镍纳米粒子与石蜡、石墨按照一定比例混合制备镍纳米粒子修饰碳糊电极,采用循环伏安法(CV)对修饰碳糊电极进行电化学表征,在0.1 mol/L B-R缓冲溶液(pH4.5)中研究了鸟嘌呤在该修饰电极上的电化学行为。结果表明,与裸碳糊电极相比,以掺杂法制备的镍纳米粒子修饰电极能够明显降低鸟嘌呤的过电位,增大其氧化电流,很好地催化氧化鸟嘌呤。在优化的实验条件下,鸟嘌呤在该修饰电极上的氧化峰电流与其浓度在1.0×10-5~5.0×10-4mol/L范围内呈良好的线性关系,检出限(3σ)为7.5×10-6mol/L。
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| 关 键 词： | 镍纳米粒子 碳糊电极 鸟嘌呤 |
Direct Electrocatalytic Oxidation of Guanine at Nickel Nanoparticles Modified Carbon Paste Electrode |
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| LI Wei-juan,LUO Shi-zhong.Direct Electrocatalytic Oxidation of Guanine at Nickel Nanoparticles Modified Carbon Paste Electrode[J].Journal of Instrumental Analysis,2010,29(4). |
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| Authors: | LI Wei-juan LUO Shi-zhong |
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| Institution: | LI Wei-juan,LUO Shi-zhong(College of Chemistry , Molecular Engineering,Qingdao University of Science , Technology,Qingdao 266042,China) |
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| Abstract: | A carbon paste electrode modified by nickel nanoparticles(NiNP/CPE)was fabricated.The direct electrochemical behavior of guanine on the NiNP/CPE was investigated by cyclic voltammetric(CV) method and the effect of experimental conditions,including the ratio of nickel nanoparticles to graphit,buffer solution and pH value,was optimized by differential pulse voltammetric(DPV) method.The results indicated that,a well-defined oxidation peak of guanine was observed on NiNP/CPE in pH 4.5 B-R buffer.Comparing with ... |
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| Keywords: | nickel nanoparticles carbon paste electrode guanine |
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