Journal
MATERIALS TRANSACTIONS
Volume 51, Issue 2, Pages 243-245Publisher
JAPAN INST METALS
DOI: 10.2320/matertrans.MC200904
Keywords
ultraviolet light; sensitivity; ethanol; SnO2-TiO2; room temperature
Funding
- MEXT of Japan
- National 973 Major Project of China
- The Key Fundamental Problem of Processing and Preparation for High Performance Magnesium Alloy [2007CB613700]
- Chinese Scholarship Council (CSC) [LJC20093012]
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TiO2-doped SnO2 nanopowcler is synthesized via a sol-gel method and characterized by atomic force microscopy and X-ray diffraction. Using this nanopowder, we have fabricated a novel semiconductor gas sensor that is sensitive to UV light illumination. We find that gas-sensing properties of TiO2-doped SnO2 sensor can be enhanced significantly under the exposure of UV light. The sensor exhibits a high sensitivity of 25 and rapid response-recovery times of 8s and 24s, respectively, under an ethanol gas of up to 100 ppm at room temperature (323 K). This suggests the possibility of development of a gas sensor for detecting ethanol at room temperature. [doi:10.2320/matertrans.MC200904]
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