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Superior NH3 Sensor Using Ni Doped K-OMS-2 Nanofibers
A room temperature reversible ammonia (NH 3 ) gas sensor based on the resistive transduction mechanism comprising of thin film of nickel doped cryptomelane octahedral molecular sieves of K-OMS-2 nanofibers is developed. Ni-OMS2 demonstrated excellent and persistent sensing toward the low concentrati...
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Published in: | IEEE sensors journal 2018-02, Vol.18 (3), p.956-961 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Online Access: | Get full text |
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Summary: | A room temperature reversible ammonia (NH 3 ) gas sensor based on the resistive transduction mechanism comprising of thin film of nickel doped cryptomelane octahedral molecular sieves of K-OMS-2 nanofibers is developed. Ni-OMS2 demonstrated excellent and persistent sensing toward the low concentration of ammonia in air at room temperature. The sensor showed strong response of 20% and 57% for 10 and 50 ppm of NH 3 . No heating was required either for sensing or recovery. Doping concentration of Ni significantly affect the ammonia sensing properties of nanofibers. Low doping of 0.11 Ni +2 in K-OMS-2 resulted in the major improvement in recovery time during ammonia sensing to 40s from 87s in undoped nanofibers. However, higher amount of Ni doping showed no response for ammonia sensing. |
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ISSN: | 1530-437X 1558-1748 |
DOI: | 10.1109/JSEN.2017.2779327 |