中文摘要：

以酸化处理的多壁碳纳米管与β环糊精为原料,采用静电自组装法制备了β环糊精/多壁碳纳米管复合材料.用循环伏安法研究了pH 值、扫描速率、催化时间、原料比例、待测液浓度等因素对β环糊精/多壁碳纳米管修饰电极在对硝基酚溶液中电化学催化效果的影响.实验结果表明,β环糊精/多壁碳纳米管复合材料对对硝基酚电催化效果明显,且该催化过程为吸附控制过程.确定了最佳催化条件为选取邻苯二甲酸氢钾作为缓冲溶液,极化时间40s,碳纳米管与环糊精质量比为1∶3.对硝基酚浓度在1.3×10-6 ~3.5×10-4 mol/L时,对硝基酚的浓度与差分脉冲峰电流呈线性关系,相关系数为0.9985,检出限为1.223×10-7 mol/L.

英文摘要：

β-cyclodextrin(β-CD)/multi-walled carbon nanotube (MWCNT)composite was prepared by the elec-trostatic self-assembly method.The electrochemistry catalytic effects of pH,scanning rate,catalytic time,raw material ratio and concentration of liquid on the glassy carbon electrode coated withβ-CD/MWCNTs composite were studied by cyclic voltammetry.The experimental results showed that the electrochemistry catalytic effect ofβ-CD/MWCNT composite on the p-nitrophenol was obvious,and it was controlled by the surface process. The optimum catalytic conditions were determined,potassium hydrogen phthalate as buffer solution,quiet time of 40 s,the mass ratio of carbon nanotubes andβ-CD was 1∶3.The electrochemical determination method of p-nitrophenol using a glassy carbon electrode coated with aβ-CD/MWCNTs composite was developed by differen-tial pulse voltammetry.The results indicated that the redox peak currents of p-nitrophenol were linear while the p-nitrophenol concentration range was from 1.3×10-6 to 3.5× 10-4 mol/L,and the linear coefficient of the redox peak current was 0.9985 and the detection limit was 1.233×10-7 mol/L.