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.
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.
出处
《科技通报》
1993年第1期14-18,共5页
Bulletin of Science and Technology
基金
中科院长春应用化学研究所电分析开放实验室资助项目
关键词
蒙脱土
靛蓝胭脂红
电极
抗坏血酸
montmorillonite
chemical modified electrode
indigo carmine
SnO_2 electrode
ascorbic acid
