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昆明冶金高等专科学校学报 ›› 2017, Vol. 33 ›› Issue (1): 84-.DOI: 10. 3969/j. issn. 1009一0479.2017.01.015

• 环境保护与化工技术 • 上一篇    下一篇

锌在嵌入式碳纳米管铋膜电极上的电化学分析

刘琼   

  1. 云南开放大学化学工程学院,云南 昆明 650500
  • 收稿日期:2016-10-13 出版日期:2017-02-28 发布日期:2017-02-28
  • 作者简介:刘琼(1985-),女,云南大理人,助教,理学硕士,主要从事分析化学研究工作。
  • 基金资助:
    云南省教育厅科学研究基金项目:铜在嵌人式碳纳米管秘膜电极上的电化学分析(2016ZDX092)。

Electrochemical Analysis of Zn on Inlaid Carbon Nanotubes Bismuth-film Electrode

LIU Qiong   

  1. School of Chemical Engineering, Yunnan Open University, Kunming 650500,China
  • Received:2016-10-13 Online:2017-02-28 Published:2017-02-28

摘要: 制备了镀有致密秘膜的嵌入式碳纳米管,并将其制成工作电极,采用循环伏安法(CV法)研究了锌的电化学行为。结果表明锌在嵌入式碳纳米管玻碳电极出现不可逆单氧化峰,氧化峰电位Epa为-0. 06 V,峰电流Ipa为10. 90 μA。在电极上的质子和电子转移数都为1。利用微分电位溶出法研究了嵌入式碳纳米管玻碳电极上同位秘膜的方法,对影响镀秘膜的条件进行了探讨,获得侧定的最佳条件研究了影响锌微分电位溶出的因素,获得最佳条件是富集电位为-1. 1V,秘质量浓度为0. 4 mg/L,pH =4. 6的 HAc-NaAc 缓冲液。标准加入法计算样品含量,在此条件下,峰高与锌质量浓度在0∽50.0 μg/L范围呈线性关系,检出限为0. 84 μg/L。测定样品含量,RSD在1. 56%∽7. 90%之间,回收率在96. 4%∽112. 0%之间。

关键词: 锌, 碳纳米管, 秘膜, 循环伏安法, 微分电位溶出法

Abstract: The embedded carbon nanotubes modified bismuth-film electrode was prepared and the electrochemical behaviors of Zn at the modified electrode
was studied with cyclic voltammetry in this work. The result shows that the oxidation peak of Zn at the modified electrode is single and irreversible. The oxidation peak potential (Epa) and current (Ipa) are -0. 06V and 10. 90 μA respectively, with two protons in this process. Then, the optimum condition of copper differential potentiometric stripping is -1.1 V in accumulation potential, 0. 4 mg/L in bismuth concentrations, and pH 4.6 in the HAc-NaAc buffers. The situ-plate bismuth and standard addition method were used to calculate the concentration of samples. The height of peak is linear with the mass 0 to 50.0 μg/L under the best conditions. The detection limit is 0.84 μg/L. The RSD is 1. 56%∽7. 90% and the recovery rate is in the range between 94.6% and 104.0%.

Key words: words, Zn, carbon nanotubes, bismuth-film, cyclic voltammetry, differential potentiometric stripmethod

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