Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 245, Issue -, Pages 533-540Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.01.100
Keywords
Indium hydroxide; Gas sensor; Inversion layer; Hydrothermal method
Funding
- NSFC [51303045, 51273056, 51473046, 21372067, 21273063, 51503058, 51527804, 51373049]
- HLJNSF of Heilongjiang [1254-NCET-024]
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Non-single crystal cubic ln(OH)(3) with porous structure was synthesized by hydrothermal method. It is well known that In(OH)(3) is an n-type semiconductor, but freshly prepared In(OH)(3) displays p-type conduction behavior according to response towards testing gases. Furthermore, the In(OH)(3) sensor displays n-type conduction behavior after it was induced by the high concentration of NOx and the induced In(OH)(3) sensor is named IIHS. The gas sensing properties of the IIHS with the concentration of NOx ranging from 100 ppm to 10 ppb were investigated at room temperature, and the IIHS displayed numerous advantages in the aspects of great reliability and high sensitivity. The mechanism of n-p-n conductivity conversion process of ln(OH)(3) was investigated and proposed by XPS and in situ DRIFT. (C) 2017 Elsevier B.V. All rights reserved.
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