Enhancement in ethanol sensing response by surface activation of ZnO with SnO2 |
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| Authors: | Onkar Singh Ravi Chand Singh |
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| Affiliation: | 1. College of Chemistry, Jilin University, Changchun 130012, PR China;2. Department of Chemistry, Tsinghua University, Beijing 100084, PR China;1. CSIR-National Physical Laboratory, Dr. K. S. Krishnan Rd., New Delhi, India;2. India Meteorological Department, Lodi Road, New Delhi 110003, India;3. Department of Computer and Information Science and Engineering, University of Florida Gainesville, FL 32611, USA;1. Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen, Fujian 361021, China;2. Department of Civil & Environmental Engineering, University of Illinois, 205 N Mathews Ave., Urbana, IL 61801, USA;3. Department of Mechanical and Manufacturing Engineering, University of Calgary, Calgary, AB T4N 1N4, Canada |
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| Abstract: | A surface functionalized gas sensing material convincingly giving enhanced response to ethanol is demonstrated by SnO2 activated ZnO. Zinc oxide was synthesized by a chemical route, deposited on an alumina substrate and activated by tin dioxide obtained by on-site oxidation of tin chloride. The XRD study of samples confirmed wurtzite hexagonal structure of zinc oxide and FESEM investigation revealed that surface of activated ZnO microrods was covered by nanoparticles of tin dioxide. Sensing response of sensing elements activated with different concentrations of tin chloride solution has been investigated. It was found that response to ethanol vapor significantly enhanced (eight times) by surface activation with tin dioxide, which optimized at a concentration of 3 wt.%. |
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