Journal
PHYSICA B-CONDENSED MATTER
Volume 527, Issue -, Pages 7-15Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physb.2017.09.112
Keywords
H2S gas sensor; ZnO thin film; Sol-gel; Selectivity; Reproducibility; Stability
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In this present work, zinc oxide (ZnO) thin film synthesized by a simple sol-gel spin coating technique. The structural, morphology, compositional, microstructural, optical, electrical and gas sensing properties of the film were studied by using XRD, FESEM, EDS, XPS, HRTEM, Raman, FTIR and UV-vis techniques. The ZnO thin film shows hexagonal wurtzite structure with a porous structured morphology. Gas sensing performance of synthesized ZnO thin film was tested initially for H2S gas at different operating temperatures as well as concentrations. The maximum gas response is achieved towards H2S gas at 300 degrees C operating temperature, at 100 ppm gas concentration as compared to other gases like CH3OH, Cl-2, NH3, LPG, CH3COCH3, and C2H5OH with a good stability.
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