Electrochemical determination of bromide at a multiwall carbon nanotubes-chitosan modified electrode |
| |
Authors: | Yan Zeng Rui-Xia Wang |
| |
Affiliation: | a College of Chemistry, Central China Normal University, Wuhan 430079, PR China b College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China c Department of Chemistry, Chizhou Teachers College, Guichi 247000 PR China |
| |
Abstract: | A multiwall carbon nanotubes (MWNTs)-chitosan modified glassy carbon electrode (GCE) exhibits attractive ability for highly sensitive cathodic stripping voltammetric measurements of bromide (Br−). In pH 1.8 H2SO4 solution, a substantial increase in the stripping peak current of Br− (compared to bare GCE and chitosan modified GCE) is observed using MWNTs-chitosan modified electrode. Operational parameters were optimized and the electrochemical behaviors of Br− were studied by different electrochemical methods. The kinetics parameters were measured, the number of electron transfer (n) was 1 and the transfer coefficient (α) is 0.17. A wide linear calibration range (3.6 × 10−7-1.4 × 10−5 g mL−1) was achieved, with a detection limit of 9.6 × 10−8 g mL−1. The mechanism of electrode reaction was fully discussed. |
| |
Keywords: | Multiwall carbon nanotubes (MWNTs) Chitosan Bromide Cathodic stripping voltammetry Modified glassy carbon electrode |
本文献已被 ScienceDirect 等数据库收录! |
|