Journal
NEW JOURNAL OF CHEMISTRY
Volume 44, Issue 29, Pages 12473-12485Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nj02690e
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Funding
- UGC-DAE-CSR [CSR-KN/CRS-83/2017-18/1124]
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Mixed transition metal oxides (MTMOs) have recently been explored as building blocks for gas sensing applications due to their enhanced sensing characteristics. Here, we demonstrate the application of a co-sputtered V2O5-CdO thin film as a novel chemiresistive sensor for the detection of methane (CH4) gas. From X-ray diffraction (XRD) studies, the mixed phase was identified as polycrystalline cadmium metavanadate (CdV2O6), and from X-ray photoelectron spectroscopy (XPS) studies, the clear existence of V(5+)and Cd2+, corresponding to V2O5-CdO, was observed. The obtained mixed phase featured fused nanorod-like structure with similar to 450 nm thickness. By monitoring the sequential sensing characteristics over various temperature (RT-150 degrees C) and concentration (25-500 ppm) range, the optimum operating temperature (100 degrees C) was identified. The polycrystalline V2O5-CdO sensor exhibited a response of similar to 1.72% towards 25 ppm CH(4)at 100 degrees C. The use of evenly co-sputtered semiconductive (Cd(2+)and V5+) nanorods will provide advanced routes towards the development of various devices based on MTMOs.
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