Direct electrochemistry and electrocatalysis of cytochrome c based on dandelion-like Bi2S3 nanoflowers
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- 作者：Qinglin Sheng ; Yu Shen ; Qian Wu ; Jianbin Zheng
- 关键词：Direct electrochemistry ; Cytochrome c ; Bismuth sulfide ; Hydrogen peroxide
- 刊名：Journal of Solid State Electrochemistry
- 出版年：2016
- 出版时间：December 2016
- 年：2016
- 卷：20
- 期：12
- 页码：3315-3322
- 全文大小：847 KB
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Physical Chemistry
Analytical Chemistry
Industrial Chemistry and Chemical Engineering
Characterization and Evaluation Materials
Condensed Matter
Electronic and Computer Engineering - 出版者：Springer Berlin / Heidelberg
- ISSN：1433-0768
- 卷排序：20
文摘
The direct electrochemistry and electrocatalysis of cytochrome c (Cyt c) based on dandelion-like bismuth sulfide (d-Bi2S3) nanoflowers have been developed. The morphologies and composition of the d-Bi2S3 were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy dispersive X-ray spectroscopy (EDS). Then, the electrochemical behaviors of Cyt c immobilized within the d-Bi2S3/chitosan film and its electrocatalytic ability toward hydrogen peroxide (H2O2) reduction were investigated by cyclic voltammetry. The electron transfer rate constant was estimated to be 13.1 s−1, suggesting that a fast direct electron transfer was realized. The prepared Cyt c/d-Bi2S3/chitosan nanobiocomposite-modified electrode possessed excellent electrocatalytic ability toward H2O2 reduction that showed linearity in the range from 0.5 μM to 1.56 mM with a correlation coefficient of 0.9993. The detection limit was 0.2 μM on signal-to-noise ratio of 3. In addition, the d-Bi2S3 nanoflowers may be also applied to direct electron transfer of other redox proteins.