Electrodeposited Alginate‐Based Green Synthesis of CuS Nanoparticles and Nanocomposite Films for Electrochemical and Colorimetric Detection

Abstract

CuS nanoparticles (NPs) and CuS NPs/alginate nanocomposite films are prepared using a novel method based on the coordinated electrodeposition of alginate. This method exquisitely utilizes the coordination of alginate with Cu 2+ ions to carry out the electrodeposition, and alginate as the stabilizer for CuS NPs and the major ingredient in the nanocomposite film. Thus, the method has many advantages such as facile operation, green route, mild conditions, and convenient post-treatment. After the electrodeposition, a smooth and homogeneous film has been electrodeposited on the anodic electrode. Transmission electron microscopy observation reveals that there are nanoparticles (the average size of 6.0 nm) in the electrodeposited film. The results from spectral analysis further confirm the existence of CuS NPs. The CuS NPs/alginate nanocomposite film modified electrode can be directly constructed by taking advantage of the electrodeposition, which shows the electrochemical detection capability towards H 2 O 2 and hydroquinone. The CuS NPs/alginate nanocomposite film also possesses the colorimetric detection capability toward H 2 O 2 and dopamine. Therefore, this study offers a green and convenient method for fabricating CuS NPs and nanocomposite films, which is promising for applications in functional nanocomposites and detection fields.

Synergism of Holmium Orthovanadate/Phosphorus-Doped Carbon Nitride Nanocomposite: Nonenzymatic Electrochemical Detection of Hydrogen Peroxide

“…Various analytical approaches are developed in detecting H 2 O 2 , which include surface-enhanced Raman spectroscopy, electrochemical detection, molecularly imprinted sensors, enzyme-linked immunoassay, photoluminescence, photoelectrochemical sensors, colorimetric detection, mass spectrometry, high-performance liquid chromatography, and colorimetric detection. − Among these, electrochemical detection has drawn tremendous attention due to its fast response, high sensitivity, portability, high reliability, better accuracy, miniaturization, low cost, and user-friendly approach. − Electrode materials are vital in electrochemical analysis to achieve an enhanced and high electrochemical performance. Kaplan et al fabricated a nonenzymatic electrochemical sensor based on nickel–iron oxide@sulfur-doped reduced graphene oxide modified glassy carbon electrodes (GCEs) to detect H 2 O 2 .…”