Construction of a Copper Bismuthate/Graphene Nanocomposite for Electrochemical Detection of Catechol

Abstract

Binary metal oxides with carbon nanocomposites have received extensive attention as research hotspots in the electrochemistry field owing to their tunable properties and superior stability. This work illustrates the development of a facile sonochemical strategy for the synthesis of a copper bismuthate/graphene (GR) nanocomposite-modified screen-printed carbon electrode (CBO/GR/SPCE) for the electrochemical detection of catechol (CT). The formation of an as-prepared CBO/GR nanocomposite was comprehensively characterized. The electrochemical behavior of the CBO/GR/SPCE toward CT was investigated by voltammetry and amperometry techniques. The fabricated CBO/GR/SPCE manifests an excellent electrocatalytic performance toward CT with a lower peak potential and a higher current value compared to those of CBO/SPCE, GR/SPCE, and bare SPCE. It is attributed to enhanced electro-catalytic activity, synergetic effects, and good active sites of the CBO/GR nanocomposite. Under the electrochemical condition, the CBO/GR/SPCE displayed a wide linear sensing range, trace-level detection limit, acceptable sensitivity, and excellent selectivity. Furthermore, our proposed CBO/GR electrode was employed successfully for CT detection in water samples.

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

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Effect of Modification of a Laccase-Based Electrochemical Biosensor with Carbon Nanotubes on Signal Separation of Dihydroxybenzene Isomers

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Target-Induced Electrochemical Sensor Based on Foldable Aptamer and MoS2@MWCNTs–PEI for Enhanced Detection of AFB1 in Peanuts

“…Nevertheless, the poor portability, relatively high cost, and demand for a skilled operator have limited their applications for portable analysis. Electrochemistry has been widely used in various fields, due to their high selectivity and sensitivity, high signal-to-noise ratio, simplicity, miniaturization, low cost, robust analysis of liquid samples, and high feasibility for on-site application. − Moreover, electrochemical biosensors combine the high sensitivity of electrochemical conversion devices and the high selectivity of biometric systems for the quantitative and qualitative detection of substances . Aptamers are widely used in various biomolecular detection due to their affordable price, high specificity, easy modification, and other advantages .…”