Sensing Mechanism and Evaluation Criteria of Semiconducting Metal Oxides Gas Sensors

2019 ◽  
pp. 23-51 ◽  
Author(s):  
Yonghui Deng
Keyword(s):  
Metal Oxides ◽  
Gas Sensors ◽  
Evaluation Criteria ◽  
Sensing Mechanism ◽  
Semiconducting Metal Oxides

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

Chemosensors ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 127
Author(s):  
Sachin Navale ◽  
Mehrdad Shahbaz ◽  
Sanjit Manohar Majhi ◽  
Ali Mirzaei ◽  
Hyoun-Woo Kim ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Gas Sensors ◽  
Noble Metals ◽  
Oil And Gas ◽  
Detection Mechanism ◽  
Reliable Detection ◽  
Electrical Sensing ◽  
Semiconducting Metal Oxides ◽  
H2s Detection

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.

scholarly journals Trends and Advances in the Characterization of Gas Sensing Materials Based on Semiconducting Oxides

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3544 ◽  
Author(s):  
David Degler
Keyword(s):  
Metal Oxides ◽  
Gas Sensors ◽  
Gas Sensing ◽  
Academic Research ◽  
Spectroscopic Techniques ◽  
Characterization Methods ◽  
Fundamental Properties ◽  
Electronic Imaging ◽  
Semiconducting Metal Oxides

The understanding of the fundamental properties and processes of chemoresistive gas sensors based on semiconducting metal oxides is driven by the available characterization techniques and sophisticated approaches used to identify structure-function-relationships. This article summarizes trends and advances in the characterization of gas sensing materials based on semiconducting metal oxides, giving a unique overview of the state of the art methodology used in this field. The focus is set on spectroscopic techniques, but the presented concepts apply to other characterization methods, such as electronic, imaging or diffraction-based techniques. The presented concepts are relevant for academic research as well as for improving R&D approaches in industry.

Thin-film gas sensors based on semiconducting metal oxides

1995 ◽  
Vol 23 (2-3) ◽  
pp. 119-125 ◽  
Author(s):  
H Meixner ◽  
J Gerblinger ◽  
U Lampe ◽  
M Fleischer
Keyword(s):  
Thin Film ◽  
Metal Oxides ◽  
Gas Sensors ◽  
Semiconducting Metal Oxides

scholarly journals Advances in designs and mechanisms of semiconducting metal oxide nanostructures for high-precision gas sensors operated at room temperature

2019 ◽  
Vol 6 (3) ◽  
pp. 470-506 ◽  
Author(s):  
Zhijie Li ◽  
Hao Li ◽  
Zhonglin Wu ◽  
Mingkui Wang ◽  
Jingting Luo ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Metal Oxides ◽  
Gas Sensors ◽  
Room Temperature ◽  
Comprehensive Review ◽  
Sensor Applications ◽  
Oxide Nanostructures ◽  
Metal Oxide Nanostructures ◽  
Semiconducting Metal Oxides ◽  
Semiconducting Metal Oxide

A comprehensive review on designs and mechanisms of semiconducting metal oxides with various nanostructures for room-temperature gas sensor applications.

scholarly journals Meso-/Nanoporous Semiconducting Metal Oxides for Gas Sensor Applications

2015 ◽  
Vol 2015 ◽  
pp. 1-14 ◽  
Author(s):  
Nguyen Duc Hoa ◽  
Nguyen Van Duy ◽  
Sherif A. El-Safty ◽  
Nguyen Van Hieu
Keyword(s):  
Metal Oxides ◽  
Gas Sensor ◽  
Gas Sensors ◽  
Sensor Technology ◽  
Soft Template ◽  
Synthesis Methods ◽  
Sensor Applications ◽  
Advantages And Disadvantages ◽  
Nanoporous Metal ◽  
Semiconducting Metal Oxides

Development and/or design of new materials and/or structures for effective gas sensor applications with fast response and high sensitivity, selectivity, and stability are very important issues in the gas sensor technology. This critical review introduces our recent progress in the development of meso-/nanoporous semiconducting metal oxides and their applications to gas sensors. First, the basic concepts of resistive gas sensors and the recent synthesis of meso-/nanoporous metal oxides for gas sensor applications are introduced. The advantages of meso-/nanoporous metal oxides are also presented, taking into account the crystallinity and ordered/disordered porous structures. Second, the synthesis methods of meso-/nanoporous metal oxides including the soft-template, hard-template, and temple-free methods are introduced, in which the advantages and disadvantages of each synthetic method are figured out. Third, the applications of meso-/nanoporous metal oxides as gas sensors are presented. The gas nanosensors are designed based on meso-/nanoporous metal oxides for effective detection of toxic gases. The sensitivity, selectivity, and stability of the meso-/nanoporous gas nanosensors are also discussed. Finally, some conclusions and an outlook are presented.

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