期刊论文详细信息
Bulletin of Materials Science | |
Poly(amido amine) dendrimer and silver nanoparticleâmulti-walled carbon nanotubes composite with poly(neutral red)-modified electrode for the determination of ascorbic acid | |
C LAKSHMI DEVI^11  | |
[1]Department of Analytical Chemistry, School of Chemical Sciences, University of Madras, Guindy Campus, Chennai 600 025, Tamil Nadu, India^1 | |
关键词: Dendrimer; ascorbic acid; nanoparticles; electrocatalytic oxidation.; | |
DOI : | |
学科分类:材料工程 | |
来源: Indian Academy of Sciences | |
【 摘 要 】
A new film containing poly(amido amine) dendrimer, silver nanoparticles and multi-walled carbon nanotubes composite with poly(neutral red) was prepared on a paraffin wax impregnated graphite electrode. The PAMAM/AgNPsâMWCNT/PNR film exhibited promising electrocatalytic oxidation of ascorbic acid (AA) in acetate buffer solution of pH 4.0. The PAMAM/AgNPsâMWCNT/PNR film-modified electrode enhanced the sensitivity of detection of AA. The PAMAM/AgNPsâMWCNT/PNR film-modified electrode was characterized by cyclic voltammetry, chronoamperometry, hydrodynamic voltammetry (HDV) and difference pulse voltammetry. These experiments confirmed the electrocatalytic oxidation of AA by PAMAM/AgNPsâMWCNT/PNR film-modified electrode. The PAMAM/AgNPsâWCNT/PNRmodifiedelectrode has been found to possess good electrocatalytic activity towards AA oxidation which has been observed at a lower oxidation potential of around 0.26 V with a higher current response. The electrochemical oxidation of AA by PAMAM/AgNPsâMWCNT/PNR-modified electrode involved a two proton and two electron process. A linear relationshipbetween the catalytic current and AA concentration was obtained in the range from 0.16 to 2500 $\mu$M with a detection limitof 0.053 $\mu$M.【 授权许可】
CC BY
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