CAJ | 학술논문

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40 s,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。
이산화처리적다벽탄납미관여β배호정위원료,채용정전자조장법제비료β배호정/다벽탄납미관복합재료。용순배복안법연구료 pH 치、소묘속솔、최화시간、원료비례、대측액농도등인소대β배호정/다벽탄납미관수식전겁재대초기분용액중전화학최화효과적영향。실험결과표명,β배호정/다벽탄납미관복합재료대대초기분전최화효과명현,차해최화과정위흡부공제과정。학정료최가최화조건위선취린분이갑산경갑작위완충용액,겁화시간40 s,탄납미관여배호정질량비위1∶3。대초기분농도재1.3×10-6~3.5×10-4 mol/L시,대초기분적농도여차분맥충봉전류정선성관계,상관계수위0.9985,검출한위1.223×10-7 mol/L。
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.