Tuning the morphology of Cu-MOFs nanostructures for sensitive ascorbic acid sensing

Zhuo Wang; Shanyu Li; Yurun Hu; Huihu Wang; Xing Xiang; Chenhuinan Wei

doi:10.1088/1361-6528/acd389

Tuning the morphology of Cu-MOFs nanostructures for sensitive ascorbic acid sensing

Nanotechnology. 2023 May 24;34(32). doi: 10.1088/1361-6528/acd389.

Authors

Zhuo Wang¹, Shanyu Li¹, Yurun Hu¹, Huihu Wang^{1

2}, Xing Xiang^{1

2}, Chenhuinan Wei^{1

2}

Affiliations

¹ Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, People's Republic of China.
² New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei University of Technology, Wuhan, People's Republic of China.

PMID: 37160110
DOI: 10.1088/1361-6528/acd389

Abstract

Metal organic frameworks are an attractive platform to develop fascinating electrocatalysts for the oxidation of ascorbic acid (AA), and their different morphologies have been hinted in literature to impact their sensing performance. In this work, by varying the reaction medium of metal source and organic ligand, copper 2-hydroxybenzene-1,4-dicarboxylate (CuBDC-OH) nanosheets (NSs), nanorods (NRs) and bulk were generated. Thereinto, CuBDC-OH-NSs displayed the highest sensitivity of 151.99μA mM^-1cm^-2in the linear range of 12-1074μM, which is 1.5 times greater than that of CuBDC-OH NRs and 3.5 times greater than that of CuBDC-OH bulk. The electrochemical analyzes manifested that the superiority of nanosheets originated from higher oxidative current, larger electrochemical active surface area and lower charge transfer resistance, which enabling the efficient electro-oxidation of AA. Additionally, satisfactory selectivity, stability and reproducibility were obtained.

Keywords: MOFs; ascorbic acid; electrochemical sensing; interfacial synthesis; two-dimensional nanosheets.