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Updated: Sep 25, 2025
Scalable Syntheses of Graphene Oxide and Reduced Graphene Oxide using Cascade Design Oxidation and Highly Basic Reduction Reactions
Published on: July 3, 2025
Simultaneous determination of hydroquinone and catechol by a reduced graphene oxide-polydopamine-carboxylated
Fengxia Chang1, Hongyue Wang1, Shuai He1
1School of Chemistry and Environment, Southwest Minzu University Chengdu 610041 P. R. China changfengxia@swun.edu.cn.
Abstract:
A reduced graphene oxide-polydopamine-carboxylated multi-walled carbon nanotube (RGO-PDA-cMWCNT) nanocomposite was fabricated via a facile, one-pot procedure and was characterized by a variety of techniques. A novel electrochemical sensor based on RGO-PDA-cMWCNT was constructed to determine hydroquinone (HQ) and catechol (CT) simultaneously. This newly prepared nanocomposite shows excellent electrocatalytic efficacy in the electrode reaction of the two isomers. Specifically, the peak-to-peak potential difference between the two dihydroxybenzenes is 115 mV for oxidation, which is obviously larger than similar electrochemical sensors. The established method displays a wide linear range from 0.5 to 5000 μM with a detection limit (S/N = 3) of 0.066 μM for HQ and 0.073 μM for CT. In addition, this electrochemical approach has been tested to measure the two dihydroxybenzenes in real samples and satisfactory results were recorded.
