Facile synthesis of ZnO doped with Au nanoparticles for sensitive and reliable photoelectrochemical detection of glucose

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Pages (from-to)4449–4459
Journal / PublicationIonics
Volume27
Issue number10
Online published17 Aug 2021
Publication statusPublished - Oct 2021

Abstract

Photoelectrochemical (PEC) sensing assisted by metal nanoparticles has attracted much interest due to the fast analysis and low detection limit. Herein, ZnO nanorod (NR) arrays are prepared hydrothermally on the nickel foam (NF) to produce the three-dimensional (3D) ZnO structure for subsequent Au nanoparticle (AuNP) deposition. The AuNPs/ZnO sensor exhibits synergistic catalytic effects in glucose detection. The charge transfer process between AuNPs and the ZnO interface and effects of different light intensities on the catalytic oxidation efficiency in glucose detection are studied systematically. Under UV light irradiation, the sensor exhibits a high sensitivity of 1133.5 µA mM−1 cm−2 which represents a 1.29-fold improvement over that without light (877.9 µA mM−1 cm−2). The sensor shows a large linear range from 1 µM to 6.917 mM as well as a low detection limit of 0.1 µM (S/N = 3). The sensor with excellent selectivity, stability, and reproducibility has large potential in photoelectrochemical nonenzymatic determination of glucose.

Research Area(s)

  • AuNPs, Glucose detection, Photoelectrochemical sensing, ZnO

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