Gas Sensing Property of Porous SnO2 Layer Synthesized through Anodic Oxidation

2019 ◽  
Vol 16 (3) ◽  
pp. 77-81 ◽  
Author(s):  
Jeong Hoon Jeun ◽  
Hyun Sam Ryu ◽  
Seong-Hyeon Hong
Keyword(s):  
Anodic Oxidation ◽  
Gas Sensing ◽  
Sno2 Layer

scholarly journals Investigating the influence of Al-doping and background humidity on NO<sub>2</sub> sensing characteristics of magnetron-sputtered SnO<sub>2</sub> sensors

2015 ◽  
Vol 4 (2) ◽  
pp. 271-280 ◽  
Author(s):  
A. A. Haidry ◽  
N. Kind ◽  
B. Saruhan
Keyword(s):  
Metal Oxide ◽  
Elevated Temperatures ◽  
Gas Sensing ◽  
Al Doping ◽  
Sensing Applications ◽  
Semiconducting Properties ◽  
Metal Oxide Gas Sensors ◽  
Stable Signal ◽  
Sensing Characteristics ◽  
Sno2 Layer

Abstract. Elevated temperatures and humidity contents affect response, lifetime and stability of metal-oxide gas sensors. Remarkable efforts are being made to improve the sensing characteristics of metal-oxide-based sensors operating under such conditions. Having versatile semiconducting properties, SnO2 is prominently used for gas sensing applications. The aim of the present work is to demonstrate the capability of the Al-doped SnO2 layer as NO2 selective gas sensor working at high temperatures under the presence of humidity. Undoped SnO2 and Al-doped SnO2 (3 at. % Al) layers were prepared by the radio frequency (r.f.) reactive magnetron sputtering technique, having an average thickness of 2.5 μm. The sensor response of Al-doped SnO2 samples was reduced in the presence of background synthetic air. Moreover, under dry argon conditions, Al doping contributes to obtain a stable signal and to lower cross-sensitivity to CO in the gas mixtures of CO + NO2 at temperatures of 500 and 600 °C. The Al-doped SnO2 sensors exhibit excellent chemical stability and sensitivity towards NO2 gas at the temperature range of 400–600 °C under a humid environment. The sensors also showed satisfactory response (τres = 1.73 min) and recovery (τrec = 2.7 min) towards 50 ppm NO2 in the presence of 10 % RH at 600 °C.

scholarly journals Sensitive Gas-Sensing by Creating Adsorption Active Sites: Coating an SnO2 Layer on Triangle Arrays

2018 ◽  
Vol 10 (34) ◽  
pp. 29092-29099 ◽  
Author(s):  
Shipu Xu ◽  
Yang Xu ◽  
Huaping Zhao ◽  
Rui Xu ◽  
Yong Lei
Keyword(s):  
Active Sites ◽  
Gas Sensing ◽  
Sno2 Layer

Photocatalytical Properties of TiO2 Nanotubes

2010 ◽  
Vol 162 ◽  
pp. 295-328 ◽  
Author(s):  
Hai Chao Liang ◽  
Xiang Zhong Li ◽  
Janusz Nowotny
Keyword(s):  
Titanium Dioxide ◽  
Cancer Treatment ◽  
Water Splitting ◽  
Anodic Oxidation ◽  
Chemical Treatment ◽  
Tio2 Nanotubes ◽  
Gas Sensing ◽  
Template Method ◽  
Photocatalytic Water Splitting

Titanium dioxide (TiO2) nanotubes have been reported one decade ago and have proven to be of a great interest in photocatalytic water splitting, as well as gas sensing and anti-bacterial/cancer treatment. This paper presents an overview on general preparation approaches (chemical treatment, template method and anodic oxidation) of tubular TiO2 nanoarchitectures and their characterization. Current applications of the nanotubes as photocatalysts are also reviewed.

Schottky diodes based on 2D materials for environmental gas monitoring: a review on emerging trends, recent developments and future perspectives

2021 ◽  
Author(s):  
Minu Mathew ◽  
Chandra Sekhar Rout
Keyword(s):  
Gas Sensing ◽  
2D Materials ◽  
Schottky Diodes ◽  
High Sensitivity ◽  
Future Perspectives ◽  
Working Temperature ◽  
Emerging Trends ◽  
Gas Sensing Properties ◽  
Recent Developments ◽  
Sensitivity And Selectivity

This review details the fundamentals, working principles and recent developments of Schottky junctions based on 2D materials to emphasize their improved gas sensing properties including low working temperature, high sensitivity, and selectivity.

Gas-sensing materials by cooperative assembly

2020 ◽  
Author(s):  
Carina Esteves ◽  
Susana Palma ◽  
Ana Rita Oliveira ◽  
Efthymia Ramou ◽  
Inês Moreira ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Cooperative Assembly
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