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。
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.
参考文献
| [1] | Iijima S .Helical microtubules of graphitic carbon[J].Na-ture,1991,354:56-58. |
| [2] | Hongxia Luo;Zujin Shi;Nanqiang Li;Zhennan Gu;Qiankun Zhuang .Investigation of the Electrochemical and Electrocatalytic Behavior of Single-Wall Carbon Nanotube Film on a Glassy Carbon Electrode[J].Analytical chemistry,2001(5):915-920. |
| [3] | Wang J .Carbon-nanotube based electrochemical biosensors: A review[J].Electroanalysis,2005(1):7-14. |
| [4] | Zhao Qiang;Gan Zhenhai;Zhuang Qiankun .Electro-chemical sensors based on carbon nanotubes[J].Electroa-nalysis,2002,14(23):1609-1613. |
| [5] | 胡陈果,王万录.碳纳米管的电化学性质及其应用研究[J].功能材料,2005(05):730-733. |
| [6] | Christopher B. Jacobs;M. Jennifer Peairs;B. Jill Venton .Review: Carbon nanotube based electrochemical sensors for biomolecules[J].Analytica chimica acta,2010(2):105-127. |
| [7] | Fenfen Zhang;Shuqing Gu;Yaping Ding.A novel sensor based on electropolymerization of β-cyclodextrin and L-arginine on carbon paste electrode for determination of fluoroquinolones[J].Analytica chimica acta,2013:53-61. |
| [8] | He Jinglin;Yang Yu;Yang Xin et al.β-cyclodextrin in-corporated carbon nanotube-modified electrode as an elec-trochemical sensor for rutin[J].Sensors and Actuators B-Chemical,2006,114:94-100. |
| [9] | Salipira K L;Mamba B B;Krause R W et al.Carbon nanotubes and cyclodextrin polymers for removing organic pollutants from water[J].ENVIRONMENTAL CHEMISTRY LETTERS,2007,5:13-17. |
| [10] | Wang Zonghua;Wang Yiming;Luo Guoan .The elec-trocatalytic oxidation of thymine atα-cyclodextrin incor-porated carbon nanotube-coated electrode[J].Electroa-nalysis,2003,15(13):1129-1133. |
| [11] | 王宗花,罗国安,肖素芳,王歌云.α-环糊精复合碳纳米管电极对异构体的电催化行为[J].高等学校化学学报,2003(05):811-813. |
| [12] | 任健敏,许元妹,曾百肇.对硝基苯酚在多壁碳纳米管修饰玻碳电极上的电化学行为及分析测定[J].化学研究与应用,2006(07):860-862. |
| [13] | Zhao Tingkai;Liu Lehao;Li Guangming .Preparation and electrochemical property of CMC/MWCNT compos-ite using ionic liquid as solvent[J].Chinese Science Bul-letin,2012,57(14):1620-1625. |
| [14] | Tingkai Zhao;Lehao Liu;Guangming Li .Electrochemical Determination of Melamine with a Glassy Carbon Electrode Coated with a Multi-Wall Carbon Nanotube/Chitosan Composite[J].Journal of the Electrochemical Society,2012(5):K141-K145. |
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