Low temperature H2S sensor based on copper oxide/tin dioxide thick film |
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| Authors: | Hongbing Wei Hongwen Sun Sumei Wang Guangzhi Chen Yingtao Hou Hongwen Guo Xiaodong Ma |
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| Institution: | 1. Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Key Laboratory of Environmental Pollution Process and Standard, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China; 2. Chemicals, Minerals & Metallic Materials Inspection Centre of Tianjin Entry-Exit Inspection and Quarantine Bureau, Tianjin 300456, China |
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| Abstract: | Nanostructured tin dioxide(SnO2)powders were prepared by a sol-gel dialytic process and and the doping of CuO on it was completed by a deposition-precipitation method.The thick film sensors were fabricated from the CuO/SnO2 polycrystalline powders.Sensing behavior of the sensor was investigated with various gases including CO,H2,NH3,hexane,acetone,ethanol,methanol and H2S in air.The as-synthesized gas sensor had much better response to H2S than to other gases.At the same time,the CuO/SnO2 sensor had enough sensitivity,together with fast response and recovery,to distinguish H2S from those gases at 160 and 210℃.Therefore,it might have promising applications in the future. |
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| Keywords: | low-temperature H2S copper oxide/tin dioxide gas sensors selectivity |
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