A facile synthesis route to BiPr composite nanosheets and sensitive electrochemical detection of l-cysteine

• Published in: Microchemical journal 2022-11, Vol.182, p.107915, Article 107915
• Main Authors: Huang, Jianfeng, Tao, Feihu, Sun, Zizhan, Li, Feiyang, Cai, Zhengyu, Zhang, Yong, Fan, Chuangang, Pei, Lizhai
• Format: Article
• Language: English
• Subjects: BiPr composite nanosheets; Electrochemical detection; Electron microscopy; Hexadecyl trimethyl ammonium bromide; l-cysteine
• ISSN: 0026-265X; 1095-9149
• DOI: 10.1016/j.microc.2022.107915

[Display omitted] •BiPr composite nanosheets have been synthesized via a facile route. ► Electrons are easy to transfer by the interface between the electrolyte and BiPr composite nanosheets modified electrode. ► BiPr composite nanosheets modified electrode shows good electro-catalytic properties for l-cysteine detection. ► The BiPr composite nanosheets modified GCE has good stability and reproducibility. The BiPr composite nanosheets have been synthesized by a facile hydrothermal method using cetyltrimethyl ammonium bromide (CTAB). The BiPr composite products were investigated by means of X-ray diffraction (XRD), electron microscopy, X-ray photoelectron spectroscopy (XPS) and electrochemical method. The obtained nanosheets possess poly-crystalline structure and thickness of less than 100 nm. The application of the BiPr composite nanosheets as the glassy carbon electrode (GCE) modified materials for l-cysteine determination was systematically investigated. The BiPr composite nanosheets modified GCE possesses better interface electron transfer properties than bare GCE exhibiting superior electro-catalytic properties for the electrochemical oxidation of l-cysteine. A pair of quasi-reversible redox peaks are observed at –0.75 V and + 0.06 V, respectively. The current response of l-cysteine is linear in the concentration range of 0.001–2 mM with a detection limit of 0.21 μM. The BiPr composite nanosheets modified GCE has considerable stability and reproducibility.