Ethanol sensing properties of networked In2O3 nanorods decorated with Cr2O3-nanoparticles |
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| Affiliation: | 1. Department of Materials Science and Engineering, Inha University, 253 Yonghyun-dong, Nam-gu, Incheon 402-751, Republic of Korea;2. Department of Mechanical Engineering, Inha University, 253 Yonghyun-dong, Nam-gu, Incheon 402-751, Republic of Korea;3. Department of Electrical Engineering, Inha University, 253 Yonghyun-dong, Nam-gu, Incheon 402-751, Republic of Korea;1. Department of Materials Science and Engineering, Korea University, Seoul 136-713, Republic of Korea;2. Department of Chemical and Materials Engineering, King Abdulaziz University, Jeddah 21589, Saudi Arabia;1. Sanjay Ghodawat University, Kolhapur(Atigre) 416118, M.S., India;2. Department of Physics, Shivaji University, Kolhapur 416004, M.S., India;3. Karmaveer Hire Arts, Commerce, Science and Education College, Gargoti 416209, M. S., India;4. Chonnam National University, Gwangju 500757, South Korea;5. School of Materials Science and Engineering, Yeungnam University, Gyeongsan 38541, South Korea;1. Department of Analytical Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China;2. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China;1. Department of Materials Science and Engineering, Inha University, Yonghyun-dong, Nam-gu, Incheon 402-751, Republic of Korea, Republic of Korea;2. School of Mechanical Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 143-701, Republic of Korea, Republic of Korea |
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| Abstract: | In2O3 nanorods decorated with Cr2O3 nanoparticles were synthesized by thermal evaporation of In2S3 powder in an oxidizing atmosphere followed by solvothermal deposition of Cr2O3 and their ethanol gas sensing properties were examined. The pristine and Cr2O3-decorated In2O3 nanorods exhibited responses of ~524% and ~1053%, respectively, to 500-ppm ethanol at 200 °C. The Cr2O3-decorated In2O3 nanorod sensor showed stronger electrical response to ethanol gas at 200 °C than the pristine In2O3 nanorod counterpart. The former also showed faster response and recovery than the latter. The pristine and Cr2O3-decorated In2O3 nanorod sensors showed the strongest response to ethanol gas at 250 and 200 °C, respectively. The Cr2O3-decorated In2O3 nanorod sensor showed selectivity for ethanol gas over other reducing gases. The underlying mechanism for the enhanced response, sensing speed and selectivity of the Cr2O3-decorated In2O3 nanorod sensor for ethanol gas is discussed. |
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| Keywords: | Decoration Gas sensors Ethanol |
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