摘要
采用自沉积方法将HAuCl4直接还原成纳米金颗粒并修饰在碳纳米管表面,所制备的纳米金(Au-CNTs/C)修饰电极对邻苯二酚(CAT)具有高的电催化氧化作用.采用循环伏安法考察CAT在Au-CNTs/C电极上的电化学行为,发现CAT在该修饰电极上发生可逆的氧化还原反应,在0.25V有明显的氧化峰.在磷酸盐缓冲溶液PBS(pH7.4)中,CAT的响应电流与浓度在5.0×10-7～5.0×10-3mol/L范围内呈线性关系,相关系数为0.9992,检出限为3.3×10-7mol/L.
Surface of carbon nanotubes （CNTs） supported gold （Au） nanoparticles was prepared by spontaneous reduction of HAuCl4 aqueous solution,and as-prepared Au-CNTs/C electrodes show high electrocatalytic performance for CAT. The electrochemical behaviors of Au-CNTs/C elecrodes were investigatated by cyclic votammetry. It was obtained a well-shaped redox reactin at Au-CNTs/C elecrodes,and oxidation peak of catechol was obviously observed at 0.25V. Additional,linear relationship was obtained between Ipa and concentration of catechol in the range of 5.0×10-7～5.0×10-3mol/L in phosphate buffer solution （pH 7.4）,with a correlation coefficient of 0.9992,and the detection limit of this method was found to be 3.3×10-7mol/L.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2010年第10期1349-1352,共4页
China Environmental Science
基金
湖南省科技厅计划项目(2009NK3107)
湖南农业大学校青年基金(08QN10)
