CuxO Nanostructure-Based Gas Sensors for H2S Detection: An Overview

Author:

Navale Sachin,Shahbaz Mehrdad,Majhi Sanjit Manohar,Mirzaei AliORCID,Kim Hyoun Woo,Kim Sang SubORCID

Abstract

H2S gas is a toxic and hazardous byproduct of the oil and gas industries. It paralyzes the olfactory nerves, with concentrations above 100 ppm, resulting in loss of smell; prolonged inhalation may even cause death. One of the most important semiconducting metal oxides for the detection of H2S is CuxO (x = 1, 2), which is converted to CuxS upon exposure to H2S, leading to a remarkable modulation in the resistance and appearance of an electrical sensing signal. In this review, various morphologies of CuxO in the pristine form, composites of CuxO with other materials, and decoration/doping of noble metals on CuxO nanostructures for the reliable detection of H2S gas are thoroughly discussed. With an emphasis to the detection mechanism of CuxO-based gas sensors, this review presents findings that are of considerable value as a reference.

Funder

National Research Foundation of Korea

Publisher

MDPI AG

Subject

Physical and Theoretical Chemistry,Analytical Chemistry

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