Open AccessGas sensing behavior of ZnO thick film sensor towards H2S, NH3, LPG and CO2.
Author(s) -
Suresh G. Onkar,
S. B. Nagdeote,
A. S. Wadatkar,
Prashant B. Kharat
Publication year - 2020
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 - 10.1088/1742-6596/1644/1/012060
Subject(s) - materials science , analytical chemistry (journal) , response time , conductivity , screen printing , electrical resistivity and conductivity , chemistry , composite material , chromatography , electrical engineering , computer graphics (images) , computer science , engineering
- ZnO is synthesized by microwave assisted technique. The XRD, TEM, SAED and SEM characterization of sample is carried out for studying crystal structure, particle size, crystalline nature and surface morphology of ZnO samples. The thick films of ZnO sample were fabricated by screen printing technique and its I-V characteristics and electrical conductivity were studied. The gas sensing response of ZnO thick film sensor towards 450 ppm of H 2 S, LPG, NH 3 and CO 2 gas was investigated. The thick film showed response 15 towards H 2 S at 150 0C, response 3 to NH 3 , response 2 for LPG and no response to CO 2 . The variation of response with H2S concentration was also studied. The response time and recovery time of sensor was 70 second. It was selective to H 2 S in presence of LPG, NH 3 and CO 2 gases. The thick film showed good reproducibility and stability for H 2 S.