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采用修饰单壁碳纳米管(SWNT、SWNT-COOH或SWNT-OH)及多壁碳纳米管(MWNT、MWNT-COOH或MWNT-OH)的石墨电极研究配位阴离子[Fe(CN)6]3-和配位阳离子[Co(phen)3]3+的电化学行为与吸附性能,借助[Co(phen)3]3+在碳纳米管(CNT)的强吸附特性制备[Co(phen)3]3+/CNT/C修饰电极,以其应用于6-MP的分析检测.结果表明:1)在CNT修饰电极上[Fe(CN)6]3-/4-呈现很好的氧化还原可逆性,而[Co(phen)3]3+则显示明显的吸附控制特征.2)[Co(phen)3]3+在多壁碳纳米管修饰电极上的吸附量较单壁碳纳米管大,但经羧基化或羟基化后,吸附量减小,而且在羧基化表面的吸附量较羟基化的大.3)[Co(phen)3]3+与6-MP间存在明显的相互作用,其配位产物的还原峰电流与6-MP浓度呈线性关系.
Graphite electrodes with single-walled carbon nanotubes (SWNT, SWNT-COOH or SWNT-OH) and multi-wall carbon nanotubes (MWNT, MWNT-COOH or MWNT-OH) were used to study the coordination anions [Fe (CN) 6] 3 - [Co (phen) 3] 3+ [Co (phen) 3] 3 with [Co (phen) 3] 3+ was prepared by the strong adsorption of carbon nanotubes ] 3 + / CNT / C modified electrode was applied to the analysis of 6-MP.The results showed that: 1) [Fe (CN) 6] 3- / 4- exhibited a good redox reversible While [Co (phen) 3] 3+ showed obvious adsorption control characteristics.2) The adsorption capacity of [Co (phen) 3] 3+ on multi-wall carbon nanotubes , But after carboxylation or hydroxylation, the amount of adsorption decreased, and the amount of adsorption on the carboxylated surface was larger than that of hydroxylated.3) There was a significant interaction between [Co (phen) 3] 3+ and 6-MP , The reduction peak current of the coordination product showed a linear relationship with 6-MP concentration.