Enhanced Electrochemical Performance Using Polyaniline/BiPr Composite Nanosheet-modified Glassy Carbon Electrode
Background:
L-cysteine (L-CySH) plays a crucial physiological role in the life-support system, which has been widely applied in the food and medicine industries. Abnormal content of LCySH in the human body can lead to liver damage, Alzheimer's disease, and even cancer. Therefore, it is of great practical importance to investigate highly sensitive and selective methods for the determination of L-CySH.
Methods:
L-CySH electrochemical detection by cyclic voltammetry (CV) technique was reported using the polyaniline/BiPr composite nanosheet-modified glassy carbon electrode (GCE).
objective:
Polyaniline/BiPr composite nanosheets modified glassy carbon electrode (GCE) was used for L-cysteine (L-CySH) electrochemical detection by cyclic voltammetry (CV) technique.
Results:
The obtained nanosheets with a size of less than 500 nm were composed of rhombohedral Bi1.35Pr0.65O3, tetragonal Bi2O3, and hexagonal Pr2O3. Irregular polyaniline nanoparticles were covered on BiPr nanosheets. Polyaniline/BiPr composite nanosheet-modified GCE had good electrocatalytic performance for L-CySH detection. A pair of CV peaks was observed on the BiPr composite nanosheet-modified GCE with the potentials at +0.06 V and –0.75 V. Peak potentials at the polyaniline/ BiPr composite nanosheet-modified GCE were shifted to –0.09 V and –0.72 V. The linear range detection limit indicated 0.0005–2 mM and 0.086 μM for the polyaniline/BiPr composite nanosheet-modified GCE.
Conclusion:
Polyaniline/BiPr composite nanosheets provide a kind of new electrode material for improving the electrochemical performance towards L-CySH determination.