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Fabrication of a propanol gas sensor using p-type nickel oxide nanostructures: The effect of ramping rate towards luminescence and gas sensing characteristics

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dc.contributor.author Mokoena, Teboho P
dc.contributor.author Hillie, Kenneth T
dc.contributor.author Swart, HC
dc.contributor.author Leshabane, N
dc.contributor.author Tshilongo, J
dc.contributor.author Motaung, DE
dc.date.accessioned 2020-10-05T08:52:34Z
dc.date.available 2020-10-05T08:52:34Z
dc.date.issued 2020-10
dc.identifier.citation Mokoena, T.P. (et.al). 2020 Fabrication of a propanol gas sensor using p-type nickel oxide nanostructures: The effect of ramping rate towards luminescence and gas sensing characteristics. Materials Chemistry and Physics, v253, 15pp. en_US
dc.identifier.issn 0254-0584
dc.identifier.issn 1879-3312
dc.identifier.uri https://www.sciencedirect.com/science/article/pii/S0254058420306866
dc.identifier.uri https://doi.org/10.1016/j.matchemphys.2020.123316
dc.identifier.uri http://hdl.handle.net/10204/11590
dc.description Copyright: 2020 Elsevier. This is the abstract version of the work. For access to the fulltext version, kindly visit the publisher's website. en_US
dc.description.abstract We report on the effect of the annealing temperature ramping rate on the gas sensing performance towards n-propanol gas and the luminescence properties using p-type NiO gas sensors prepared by the hydrothermal method and annealed at various ramping rates. The crystallite sizes of NiO nanostructures decreased from 22 to 7.4 nm, while the Brunauer–Emmett–Teller measurements complemented that by showing improvement in surface area from 0.15 to 129.11 m2/g. The blue emission observed from photoluminescence studies was associated with oxygen and/or nickel vacancies. The existence of a non-stoichiometric NiO was thoroughly investigated by x-ray photoelectron spectroscopy. Among the fabricated p-type NiO sensors, the ramping rate of 1 °C/min NiO-based sensor demonstrated excellent sensitivity, rapid response/recovery times and low limit of detection to n-propanol in dry air and relative humidity (RH) conditions. Moreover, NiO-1 oC/min-based sensor showed enhanced and stable response in the existence of various RH and its response remained stable with RH percentage. Such stability to RH changes makes it competitive for practical applications. The sensor further showed a clear stability towards n-propanol after 10 days, proving that it can be considered as a possible contender for the detection of n-propanol gas at relatively low operating temperatures. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Worklist;23763
dc.subject Gas sensing en_US
dc.subject Luminescence en_US
dc.subject N-propanol en_US
dc.subject p-type NiO en_US
dc.subject Ramping rates en_US
dc.title Fabrication of a propanol gas sensor using p-type nickel oxide nanostructures: The effect of ramping rate towards luminescence and gas sensing characteristics en_US
dc.type Article en_US
dc.identifier.apacitation Mokoena, T. P., Hillie, K. T., Swart, H., Leshabane, N., Tshilongo, J., & Motaung, D. (2020). Fabrication of a propanol gas sensor using p-type nickel oxide nanostructures: The effect of ramping rate towards luminescence and gas sensing characteristics. http://hdl.handle.net/10204/11590 en_ZA
dc.identifier.chicagocitation Mokoena, Teboho P, Kenneth T Hillie, HC Swart, N Leshabane, J Tshilongo, and DE Motaung "Fabrication of a propanol gas sensor using p-type nickel oxide nanostructures: The effect of ramping rate towards luminescence and gas sensing characteristics." (2020) http://hdl.handle.net/10204/11590 en_ZA
dc.identifier.vancouvercitation Mokoena TP, Hillie KT, Swart H, Leshabane N, Tshilongo J, Motaung D. Fabrication of a propanol gas sensor using p-type nickel oxide nanostructures: The effect of ramping rate towards luminescence and gas sensing characteristics. 2020; http://hdl.handle.net/10204/11590. en_ZA
dc.identifier.ris TY - Article AU - Mokoena, Teboho P AU - Hillie, Kenneth T AU - Swart, HC AU - Leshabane, N AU - Tshilongo, J AU - Motaung, DE AB - We report on the effect of the annealing temperature ramping rate on the gas sensing performance towards n-propanol gas and the luminescence properties using p-type NiO gas sensors prepared by the hydrothermal method and annealed at various ramping rates. The crystallite sizes of NiO nanostructures decreased from 22 to 7.4 nm, while the Brunauer–Emmett–Teller measurements complemented that by showing improvement in surface area from 0.15 to 129.11 m2/g. The blue emission observed from photoluminescence studies was associated with oxygen and/or nickel vacancies. The existence of a non-stoichiometric NiO was thoroughly investigated by x-ray photoelectron spectroscopy. Among the fabricated p-type NiO sensors, the ramping rate of 1 °C/min NiO-based sensor demonstrated excellent sensitivity, rapid response/recovery times and low limit of detection to n-propanol in dry air and relative humidity (RH) conditions. Moreover, NiO-1 oC/min-based sensor showed enhanced and stable response in the existence of various RH and its response remained stable with RH percentage. Such stability to RH changes makes it competitive for practical applications. The sensor further showed a clear stability towards n-propanol after 10 days, proving that it can be considered as a possible contender for the detection of n-propanol gas at relatively low operating temperatures. DA - 2020-10 DB - ResearchSpace DP - CSIR KW - Gas sensing KW - Luminescence KW - N-propanol KW - p-type NiO KW - Ramping rates LK - https://researchspace.csir.co.za PY - 2020 SM - 0254-0584 SM - 1879-3312 T1 - Fabrication of a propanol gas sensor using p-type nickel oxide nanostructures: The effect of ramping rate towards luminescence and gas sensing characteristics TI - Fabrication of a propanol gas sensor using p-type nickel oxide nanostructures: The effect of ramping rate towards luminescence and gas sensing characteristics UR - http://hdl.handle.net/10204/11590 ER - en_ZA


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