Open AccessImprovement in the gas-sensing properties of a ZnO:Zn2TiO4 composite sensor by light irradiation
Author(s) -
G. Atanasova,
T. Dilova,
A. Dikovska,
Ru Nikov,
N.N. Nedyalkov
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2240/1/012016
Subject(s) - irradiation , materials science , carbon monoxide , composite number , methane , selectivity , analytical chemistry (journal) , chemistry , composite material , chromatography , catalysis , biochemistry , physics , organic chemistry , nuclear physics
In the present study, we demonstrate the application of highly porous ZnO:Zn 2 TiO 4 nanocomposites as gas sensors. The composite sensor elements were prepared by pulsed laser deposition performed in air at atmospheric pressure. Gas detection was achieved through irradiating the sensor surface with UV light. The gas-sensing properties of the composite sensor were studied under exposure to ammonia, carbon monoxide, ethanol, and acetone. The highest response rate of the sensor element was observed in the case of exposure to carbon monoxide, with detection below 1 ppm being demonstrated. The influence was investigated of the additional light irradiation on the response and the times of response and recovery of the sensor elements. It was found that illuminating the sensor surface with blue light increased the sensor response to all tested gases, while a red-light irradiation enhanced the sensor element selectivity to carbon monoxide.