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Aero-gel based CeO2...
Aero-gel based CeO2 nanoparticles : synthesis, structural properties and detailed humidity sensing response
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- Poonia, Ekta (författare)
- DCR Univ Sci & Technol, Dept Chem, Phys Chem Res Lab, Murthal 131039, Haryana, India
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- Mishra, Prashant Kumar (författare)
- Ctr Fire Explos & Environm Safety, Environm Safety Grp, Delhi 110054, India;Univ Delhi, Dept Chem, Delhi 110007, India
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- Kiran, Vijay (författare)
- CRA Coll Sonipat, Dept Chem, Sonipat 131001, Haryana, India
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- Sangwan, Jasbir (författare)
- GSSS Tajpur, Dept Sch Educ, Sonipat 131027, Haryana, India
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- Kumar, Rakesh (författare)
- Univ Delhi, Dept Chem, Delhi 110007, India
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- Rai, Pramod Kumar (författare)
- Ctr Fire Explos & Environm Safety, Environm Safety Grp, Delhi 110054, India
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- Malik, Ritu (författare)
- Univ Calif Berkeley, BSAC, Berkeley, CA 94720 USA
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- Tomer, Vijay K. (författare)
- Univ Calif Berkeley, BSAC, Berkeley, CA 94720 USA
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- Ahuja, Rajeev, 1965- (författare)
- Uppsala universitet,Materialteori
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- Mishr, Yogendra Kumar (författare)
- Univ Kiel, Inst Mat Sci, Funct Nanomat Chair, Kaiserstr 2, D-24143 Kiel, Germany
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(creator_code:org_t)
- 2019
- 2019
- Engelska.
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Ingår i: Journal of Materials Chemistry C. - : ROYAL SOC CHEMISTRY. - 2050-7526 .- 2050-7534. ; 7:18, s. 5477-5487
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- In this work, we present aero-gel based cerium oxide (CeO2) nanoparticles for the relative humidity (%RH) sensing application. X-ray diffraction (XRD) and N-2 adsorption-desorption isotherms revealed that the synthesized CeO2 nanoparticles (NPs) possessed a face centered cubic (fcc) structure with a high surface area (268 m(2) g(-1)). The high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), and selected area electron diffraction (SAED) studies confirmed that the shape of CeO2 NPs was spherical and they possessed a polycrystalline nature. X-ray photoelectron spectroscopy (XPS) studies revealed the presence of both trivalent (Ce3+) and tetravalent (Ce4+) oxidation states of ceria. The CeO2 NPs' response towards %RH was explored by measuring the important sensing attributes (response/recovery, linearity, hysteresis, repeatability and stability) at 11-98%RH and at room temperature. An impressive impedance change of 4.5 orders of magnitude was observed along with a swift response (4.6 s) time and rapid recovery (2.7 s) time. Moreover, the prepared sensor showed negligible hysteresis, excellent stability and good reversible response in the complete 11-98%RH range.
Ämnesord
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
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Poonia, Ekta
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Mishra, Prashant ...
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Kiran, Vijay
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Sangwan, Jasbir
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Kumar, Rakesh
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Rai, Pramod Kuma ...
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Malik, Ritu
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Tomer, Vijay K.
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Ahuja, Rajeev, 1 ...
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Mishr, Yogendra ...
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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och Materialkemi
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Journal of Mater ...
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Uppsala universitet