Wide range humidity sensing of LiCl incorporated in mesoporous silica circular discs
IR@NPL: CSIR-National Physical Laboratory, New Delhi
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| Title |
Wide range humidity sensing of LiCl incorporated in mesoporous silica circular discs
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| Creator |
Kunchakara, Suhasini
Shah, Jyoti Singh, Vaishali Kotnala, R. K. |
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| Subject |
Crystallography
Applied Physics/Condensed Matter |
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| Description |
Lithium chloride (LiCl) incorporated MCM-41 has been synthesised by sol-gel method using tetraethyl orthosilicate as a precursor in basic medium. 5, 10, 15, 20, 25, 30 and 35 wt% of LiCl were incorporated in mesoporous silica to investigate the humidity sensing. With increasing wt% of LiCl broadening of O-H peak is observed in the Fourier Transform Infrared spectra, indicating greater adsorption of hydroxyl groups on porous silica. The surface area of the MCM-41 circular discs was determined by Brunauer-Emmett-Teller (BET). Scanning electron microscopy images suggest that incorporation of LiCl leads to coalescence of grains in mesoporous silica. 25 wt% LiCl incorporated MCM-41 showed a wide range linear response of impedance change for 11%-90% RH exhibiting 3.5-order drop in impedance at a 1 kHz frequency. The Nyquist plots for all compositions showed increased ionic conduction with increasing relative humidity.
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| Publisher |
Taylor & Francis
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| Date |
2017
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://npl.csircentral.net/2960/1/Wide%20range%20humidity%20sensing%20of%20LiCl%20incorporated%20in%20mesoporous%20silica%20circular%20discs.pdf
Kunchakara, Suhasini and Shah, Jyoti and Singh, Vaishali and Kotnala, R. K. (2017) Wide range humidity sensing of LiCl incorporated in mesoporous silica circular discs. Phase Transitions, 90. pp. 1241-1255. ISSN 0141-1594 |
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| Relation |
http://npl.csircentral.net/2960/
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