The Synthesis of Chitosan Decorated Reduced Graphene Oxide‐Ferrocene Nanocomposite and its Application in Electrochemical Detection Rhodamine B

Abstract

Chitosan (CS) decorated reduced graphene oxide‐Ferrocene nanocomposite (RGO−Fc−CS) was synthesized by a one‐pot reaction. In the synthesis process of RGO−Fc−CS, GO−Fc was successfully self‐assembled via the π–π interaction, which had the features of large surface area and the high load. Then GO‐Fc and CS linked via one‐pot under alkaline conditions. The FT−IR, TGA, SEM were employed to characterize the successful synthesis of RGO−Fc−CS composites. A miniature electrochemical system was fabricated by RGO−Fc−CS modified glassy carbon electrode (expressed as RGO−Fc−CS/GCE) for the sensitive detection of RhB enantiomers via DPV. Electrochemical results revealed that the RGO−Fc−CS/GCE exhibited high molecular recognition toward RhB. Due to the synergy between the RGO−Fc and CS, the RGO−Fc−CS/GCE showed a linear range of 0.001–70 μM with a LOD of 0.5 nM, indicating that RGO−Fc−CS/GCE has broad application prospects to simplify monitor RhB real‐time.

Applicability of a graphene oxide nanocomposite for fabrication of an electrochemical sensor for simultaneous detection of sunset yellow and rhodamine B in food samples

“…13 As a component of dyeing wastewater, RhB harms the ecological environment, too. 14 RhB can be found in industrial wastewater. Because RhB biodegradation is difficult, 15 it can damage plants and animals and pose a health threat to humans.…”

“…4,10,11 Therefore, there is a need to develop a detection method that is high-speed, selective, reliable, and cost-effective. 4,14 In this regard, electrochemical analysis is a preferable option due to its simplicity, low cost, high sensitivity, good selectivity, low detection limit, fast detection, and real-time detection under in situ conditions. [32][33][34][35][36][37] The performance of electrochemical sensors is mainly determined by the electrocatalytic activity of the working electrode.…”

Study and Application of Molecularly Imprinted Electrochemical Sensor Based on AuNPs/N-GR@CS for Highly Selective Recognition of Trace Hyperoside

“…[26][27][28] Yang and coworkers constructed an electrochemical sensor for polymer recognition and detection of Rhodamine B, using chitosan functionalized reduction of graphene oxide and ferrocene nanocomposites. 29 In the meantime, the results showed that the detection limit of the sensor could reach 0.5 nM.…”