Impedance Spectroscopy-Based Reduced Graphene Oxide-Incorporated ZnO Composite Sensor for HS Investigations.

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ID: 32935
2019
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Abstract
Electrochemical impedance spectroscopy (EIS) has been applied to measure the HS gas response of the sensor fabricated on reduced graphene oxide (rGO)-incorporated nano-zinc oxide (n-ZnO) composites. These nanocomposites were prepared by a facile one-step solution route at room temperature. The structural, surface morphological, and elemental analyses of the composite material have been investigated. EIS was carried out to study the HS gas-sensing properties of fabricated sensors. The developed sensor showed an optimal HS gas response to various concentrations ranging from 2 to 100 ppm at 90 °C. The HS gas-sensing performances of pure n-ZnO and various concentrations of rGO-incorporated n-ZnO were evaluated. The HS gas-sensing results showed that n-ZnO/rGO composites exhibited high response when compared to pure n-ZnO. The enhanced HS response was speculated to be ascribed due to two factors. First, rGO creates reactive sites for HS molecule adsorption. Second, rGO has great electrical conductivity compared to n-ZnO that enables the active transport of electrons from HS gas on interaction with the sensing layer, resulting in enhanced gas response at 90 °C temperatures.
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balasubramani2019impedanceacs Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Balasubramani, V;Sureshkumar, S;Rao, T Subba;Sridhar, T M;
Journal ACS omega
Year 2019
DOI
10.1021/acsomega.9b00754
URL
Keywords Keywords not found

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