Metal oxide-metal nanocomposite-modified electrochemical sensors for toxic chemicals

K. Koteshwara Reddy, K. Yugender Goud, M. Satyanarayana, Shekher Kummari, V. Sunil Kumar, Harshad Bandal, Tippabattini Jayaramudu, Radha Devi Pyarasani, Hern Kim, John Amalraj, K. Vengatajalabathy Gobi

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

3 Scopus citations

Abstract

This chapter summarizes the recent advances in the electrochemical detection of toxic chemicals with the use of metal oxide-metal nanocomposites as the electrochemical sensing platform. The study of toxic chemicals was classified into the following five major groups: endocrine disrupting chemicals, pesticides and disinfectants, environmental pollutants, mycotoxins, and volatile organic compounds. Electrochemical (amperometric, voltametric, and impedimetric) sensor systems made up of metal oxide-metal nanocomposites are systematically reviewed. A metal oxide-metal nanocomposite as an entity provides augmented characteristics compared to the original constituents due to the synergism between the metal nanoparticles and the metal oxide derivatives. The resultant nanocomposites furnish an enriched active surface area, better adsorption ability, and improved electrocatalytic activity. As a result, the sensor systems not only engender subfemtomolar detection limits but also thrive in a widespread concentration range along with much better selectivity. Integration of nanocomposites with electroanalytical systems is extensively sought after to harvest various features, such as miniaturization, rugged instrumentation with no mechanical parts, portable on-site analysis, multiplex analysis, automation, tunable microprobes apt for in vivo analysis, etc., in the developed sensor systems. It is anticipated that this chapter will help electrochemists to deliberate innovative combinations of metal oxides and metal nanoparticles along with other advanced functional materials while constructing electrochemical sensor systems for on-site analysis of any necessary analyte.

Original languageEnglish
Title of host publicationMetal Oxides in Nanocomposite-Based Electrochemical Sensors for Toxic Chemicals
PublisherElsevier
Pages79-137
Number of pages59
ISBN (Electronic)9780128207277
ISBN (Print)9780128209394
DOIs
StatePublished - 1 Jan 2021
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2021 Elsevier Inc. All rights reserved.

Keywords

  • Electrochemical sensor
  • Endocrine disrupting chemicals
  • Environmental pollutants
  • Metal oxide
  • Nanocomposite
  • Nerve agents
  • Pesticides and disinfectants
  • Volatile organic compounds

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