Sn-MOF@CNT nanocomposite: An efficient electrochemical sensor for detection of hydrogen peroxide

Sushma Rani; Bharti Sharma; Rajesh Malhotra; Sandeep Kumar; Rajender S Varma; Neeraj Dilbaghi

doi:10.1016/j.envres.2020.110005

Sn-MOF@CNT nanocomposite: An efficient electrochemical sensor for detection of hydrogen peroxide

Environ Res. 2020 Dec:191:110005. doi: 10.1016/j.envres.2020.110005. Epub 2020 Sep 12.

Authors

Sushma Rani¹, Bharti Sharma², Rajesh Malhotra¹, Sandeep Kumar², Rajender S Varma³, Neeraj Dilbaghi⁴

Affiliations

¹ Department of Chemistry, Guru Jambheshwar University of Science and Technology, Hisar, 125001, India.
² Department of Bio and Nano Technology, Guru Jambheshwar University of Science and Technology, Hisar, 125001, India.
³ Regional Centre of Advanced Technologies and Materials, Palacky University, Šlechtitelů 27, 783 71, Olomouc, Czech Republic. Electronic address: Varma.Rajender@epa.gov.
⁴ Department of Bio and Nano Technology, Guru Jambheshwar University of Science and Technology, Hisar, 125001, India. Electronic address: ndnano@gmail.com.

PMID: 32926892
DOI: 10.1016/j.envres.2020.110005

Abstract

A novel approach for the assembly of Sn-based metal organic framework (Sn-MOF) via solvothermal method and its composite (Sn-MOF@CNT) with electroactive material, carbon nanotubes (CNT) by sonochemical means, is described that is useful for hydrogen peroxide sensing; large surface area and pore volume of Sn-MOF were exploited where in the crystallinity of the Sn-MOF was preserved upon inclusion of CNT over its surface. The surface morphology and structural analysis of Sn-MOF and its composite form, Sn-MOF@CNT, were determined analytically through Fourier-transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), Scanning electron microscopy (SEM), Brunauer-Emmett-Teller and Energy-dispersive X-ray spectroscopy (EDX). The developed Sn-MOF@CNT sensor was expansively used to determine and optimize the effect of scan rate, concentration and detection limits including the EDX and SEM analysis of used Sn-MOF@CNT nanocomposite's post hydrogen peroxide sensing. The electrochemical sensing with Sn-MOF@CNT revealed a lower limit of detection ~4.7 × 10^-3 μM with wide linear range between 0.2 μM and 2.5 mM. This study has explored a new strategy for the deposition of CNT over Sn-MOF via a simple sonochemical methodology for successful electrochemical detection of H₂O₂, an approach that can be imitated for other applications.

Keywords: Carbon nanotube; Electrochemical sensing; Hydrogen peroxide detection; Sn-metal organic framework.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Hydrogen Peroxide
Metal-Organic Frameworks*
Nanocomposites*
Nanotubes, Carbon*
Spectroscopy, Fourier Transform Infrared

Substances

Metal-Organic Frameworks
Nanotubes, Carbon
Hydrogen Peroxide