An electrochemical sensor for the detection of p-nitrophenol based on a cyclodextrin-decorated gold nanoparticle–mesoporous carbon hybrid. Issue 14 (18th June 2019)

• Record Type: Journal Article
• Authors: Zhou, Yongying; Zhao, Jin; Li, Shenghua; Guo, Minjie; Fan, Zhi
• Is Part Of: Analyst. Volume 144:Issue 14(2019)
• Page Start: 4400
• Page End: 4406
• Publication Date: 2019-06-18
• Subjects: Chemistry, Analytic -- Periodicals; 543
• DOI: 10.1039/c9an00722a
• Languages: English
• ISSNs: 0003-2654

Abstract

Abstract : A novel electrochemical sensor based on a cyclodextrin-decorated gold nanoparticle–mesoporous carbon hybrid was constructed for the detection of p -nitrophenol. Abstract : In this work, a novel electrochemical sensor was constructed for the detection of p -nitrophenol. First, per-6-deoxy-per-6-(2-carboxy-methyl)thio-β-cyclodextrin (AcSCD) was synthesized and used as a stabilizer agent to decorate gold nanoparticles (AcSCD-AuNPs). Subsequently, a novel electrode material was fabricated by the incorporation of AcSCD-AuNPs on mesoporous carbon (MC). Furthermore, a glassy carbon electrode electrochemical sensor modified with AcSCD-AuNPs-MC was prepared and characterized by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Eventually, the constructed electrochemical sensor was used for the detection of p -nitrophenol by differential pulse voltammetry (DPV) experiments. The results showed that the linear response ranges are 0.1–10 μM and 10–350 μM, with a detection limit of 3.63 μg mL −1 . Therefore, it is demonstrated that AcSCD-AuNPs-MC provides a synergistic effect of high catalytic activity from AuNPs and supramolecular recognition property from AcSCD effectively incorporated on MC for further electrochemical sensor applications.