Enhanced H2S Gas-Sensing Performance of Zn2SnO4 Lamellar Micro-Spheres

Comparative study on formic acid sensing properties of flame-made Zn2SnO4 nanoparticles and its parent metal oxides

“…Thus, the kind and number of oxygen vacancies directly affect the response, selectivity, and stability of the sensor. 1,2,4,28 In the present work, the optimal working temperature of the S-Zn 2 SnO 4 sensor is 300 1C, at which the dominant chemisorbed oxygen species are O À species induced via the following reaction: 12,21,28,72 e À + 1/2O 2 -O ads À (7) Compared with its parent metal oxides, Zn 2 SnO 4 is a more effective sensing material that exhibits more oxygen vacancies for creating electrons to react with gas molecules in the gassensing process. This is because the Zn 2 SnO 4 lattice contains two kinds of metal cations, Zn 2+ and Sn 4+ , generating a number of oxygen vacancies to be the active sites for chemical adsorption.…”

Dip-coating decoration of Ag2O nanoparticles on SnO2 nanowires for high-performance H2S gas sensors

“…5 However, the permissible concentration of H 2 S recommended by the Scientic Advisory Board on Toxic Air Pollutants (USA) ranges within 20-100 ppb. 6 Thus, effective gas sensors for detecting low levels of H 2 S under eld conditions are urgent to develop. 2 Many techniques for H 2 S detection have been developed, but metal oxide-based resistive-type gas sensors are advantageous because of their low cost, high sensitivity, real-time detection, portability, and low power consumption.…”

Gas Sensing Performances of ZnO Hierarchical Structures for Detecting Dissolved Gases in Transformer Oil: A Mini Review

“…Different types of gas sensors have already been applied in the online detection of dissolved gases in transformer oil, such as resistance-type (Benounis et al, 2008 ; Sun et al, 2015 ), optical-type (Ma et al, 2012 ) and electrochemical-type (Ding et al, 2014 ). Among diverse types of gas sensors, resistance-based sensors stand out owing to advantages like the small, cheap, high sensitivity and low power consumption (Bodzenta et al, 2002 ; Yang et al, 2011 ; Zhao et al, 2017 ; Xu et al, 2018 ). With the increasing demand for better gas sensors of higher sensitivity and selectivity (Sun et al, 2012 ; Gardon and Guilemany, 2013 ), countless endeavors have been poured on hunting for more suitable sensing nanomaterials.…”