标题：Determination of Pentachlorophenol at Carbon Nanotubes Modified Electrode Incorporated with β-Cyclodextrin
作者：Hui Xu;Xiaoli Zhang;Jinhua Zhan
作者机构：[Xu, H] School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China;[ Zhang, X] School of Chemistry and Chemical Engineerin 更多
会议名称：International Conference on Nanoscience and Technology (ChinaNANO 2009)
会议日期：SEP 01-03, 2009
来源：Journal of nanoscience and nanotechnology
关键词：Pentachlorophenol (PCP);β-cyclodextrin (β-CD);Carbon Nanotubes (CNTs);Modified Electrode;Voltammetry
摘要：A facile and reliable electrochemical technique at β-cyclodextrin incorporated carbon nanotubes modified glassy carbon electrode (β-CD/CNTs/GCE) was proposed for determination of pentachlorophenol (PCP). The electrochemical behavior of PCP at the β-CD/CNTs/GCE was investigated by cyclic voltammetry and linear sweep voltammetry. The β-CD/CNTs/GCE showed good analytical performance characteristics in electrocatalytic oxidation of PCP, compared with the simple carbon nanotube modified electrode (CNTs/GCE) and bare glassy carbon electrode (GCE). After accumulation for 5 min on β-CD/CNTs/GCE, the peak current increased linearly with the concentration of PCP in the range from 8.0 × 10~(-7) to 1.04 × 10~(-5) mol/L. The detection limit was 4.0 × 10~(-8) mol/L at 3σ level. The proposed electrode presented good repeatability for the determination of PCP in artificial wastewater, and the recovery was 97%-103%. This modified electrode combined the advantages of carbon nanotubes and supramolecular cyclodextrin, leading to new capabilities for electrochemical detection of PCP.