| 蒙脱土—染料修饰电极制备及其对抗坏血酸的催化作用 |
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| 引用本文： | 王华伟,沈报恩.蒙脱土—染料修饰电极制备及其对抗坏血酸的催化作用[J].科技通报,1993,9(1):14-18. |
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| 作者姓名： | 王华伟 沈报恩 |
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| 作者单位： | 杭州大学化学系 310028 |
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| 基金项目： | 中科院长春应用化学研究所电分析开放实验室资助项目 |
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| 摘 要： | 用蒙脱土制备了蒙脱土/SnO_2/染料(靛蓝胭脂红)化学修饰电极.循环伏安图表明,有机染料分子可以持留在蒙脱上膜中,并显示出电化学活性.用蒙脱土制备的化学修饰电极(CME)可以很大地改进电极反应的稳定性.电活性物在蒙脱土膜中的电化学行为是受扩散控制的.测得扩散系数的数量级为10~(-10)cm~2/s.所制得的蒙脱土/SnO_2/染料化学修饰电极对抗坏血酸的电化学氧化显示电催化作用,使它的氧化电位降低了100mV.
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| 关 键 词： | 蒙脱土 靛蓝胭脂红 电极 抗坏血酸 |
Preparation of Clay-dye Modified Electrode and Its Catalytic Effect on Ascorbic Acid |
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| Wang Huawei,Shen Baoen,Shun Maosong,Wang Guosun,Peng Tuzhi.Preparation of Clay-dye Modified Electrode and Its Catalytic Effect on Ascorbic Acid[J].Bulletin of Science and Technology,1993,9(1):14-18. |
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| Authors: | Wang Huawei Shen Baoen Shun Maosong Wang Guosun Peng Tuzhi |
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| Institution: | Wang Huawei,Shen Baoen,Shun Maosong,Wang Guosun,Peng Tuzhi Department of Chemistry,Hangzhou University,310028 |
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| Abstract: | Clay/SnO_2 modified electrode(CME) was prepared with natural montmorillonite. Cyclic voltammogram
shows that the organic dye (indigo carmine) can be remained in the clay film and reveals electrochemical ac-
tivity. The stability of electrode reaction was significantly improved by using montmorillonite CME. The
electrochemical behavior of the electroactive species in clay film was diffusion-controlled and the measured
diffusion coefficient was of the order of 10~(-10)cm~2/s. The prepared clay-dye CME exhibits catalytic effect on
the electrochemical oxidation of ascorbic acid making oxidation over-potential decrease by 100mV. |
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| Keywords: | montmorillonite chemical modified electrode indigo carmine SnO_2 electrode ascorbic acid |
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