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Design of porous p-type LaCoO3 nanofibers with remarkable response and selectivity to ethanol at low operating temperature

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dc.contributor.author Shingange, Katekani
dc.contributor.author Swart, HC
dc.contributor.author Mhlongo, Gugu H
dc.date.accessioned 2020-03-23T07:15:11Z
dc.date.available 2020-03-23T07:15:11Z
dc.date.issued 2020-04
dc.identifier.citation Shingange, K., Swart, H.C. and Mhlongo, G.H. 2020. Design of porous p-type LaCoO3 nanofibers with remarkable response and selectivity to ethanol at low operating temperature. Sensors and Actuators B: Chemical, v308, 12pp. en_US
dc.identifier.issn 0925-4005
dc.identifier.uri sciencedirect.com/science/article/pii/S0925400520300174
dc.identifier.uri https://doi.org/10.1016/j.snb.2020.127670
dc.identifier.uri http://hdl.handle.net/10204/11376
dc.description Copyright: 2020 Elsevier. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, kindly consult the publisher's website. en_US
dc.description.abstract This work reports on the fabrication of remarkably selective and sensitive LaCoO3 nanofibers (NFs) based sensors obtained after annealing at different temperatures of 550, 650, and 700 °C. Findings from field emission scanning electron and high resolution transmission electron microscopes demonstrated that the synthesized LaCoO3 NFs consisted of a number of interconnected particles with average sizes of ~ 47, 58 and 77 nm, for 550, 650, and 700 °C annealing temperatures, respectively. Systematic gas sensing analysis revealed that the sensors based on LaCoO3 NFs have substantial sensitivity to 40 ppm ethanol gas with the sensor obtained at 650 °C revealing an outstanding response of 32.4 at a lower optimum operating temperature of 120 °C. While it exhibited good selectivity to ethanol gas as well as fast response and recovery speeds of 26 and 66 s, respectively. The enhanced sensing capability of the LaCoO3 NFs based sensor at 650 °C stems from combined effects of the interparticle nanofibrous structure, which provided high surface and porous channels. These allowed access to active sites as well as ease of gas diffusion and overlapping of the hole accumulation layers along the fiber direction producing a continuous hole transfer channels. The detailed ethanol sensing mechanism of these NFs is also discussed. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Worklist;23211
dc.subject Ethanol en_US
dc.subject Electrospinning en_US
dc.subject p-type en_US
dc.subject LaCoO3 nanofiber en_US
dc.title Design of porous p-type LaCoO3 nanofibers with remarkable response and selectivity to ethanol at low operating temperature en_US
dc.type Article en_US
dc.identifier.apacitation Shingange, K., Swart, H., & Mhlongo, G. H. (2020). Design of porous p-type LaCoO3 nanofibers with remarkable response and selectivity to ethanol at low operating temperature. http://hdl.handle.net/10204/11376 en_ZA
dc.identifier.chicagocitation Shingange, Katekani, HC Swart, and Gugu H Mhlongo "Design of porous p-type LaCoO3 nanofibers with remarkable response and selectivity to ethanol at low operating temperature." (2020) http://hdl.handle.net/10204/11376 en_ZA
dc.identifier.vancouvercitation Shingange K, Swart H, Mhlongo GH. Design of porous p-type LaCoO3 nanofibers with remarkable response and selectivity to ethanol at low operating temperature. 2020; http://hdl.handle.net/10204/11376. en_ZA
dc.identifier.ris TY - Article AU - Shingange, Katekani AU - Swart, HC AU - Mhlongo, Gugu H AB - This work reports on the fabrication of remarkably selective and sensitive LaCoO3 nanofibers (NFs) based sensors obtained after annealing at different temperatures of 550, 650, and 700 °C. Findings from field emission scanning electron and high resolution transmission electron microscopes demonstrated that the synthesized LaCoO3 NFs consisted of a number of interconnected particles with average sizes of ~ 47, 58 and 77 nm, for 550, 650, and 700 °C annealing temperatures, respectively. Systematic gas sensing analysis revealed that the sensors based on LaCoO3 NFs have substantial sensitivity to 40 ppm ethanol gas with the sensor obtained at 650 °C revealing an outstanding response of 32.4 at a lower optimum operating temperature of 120 °C. While it exhibited good selectivity to ethanol gas as well as fast response and recovery speeds of 26 and 66 s, respectively. The enhanced sensing capability of the LaCoO3 NFs based sensor at 650 °C stems from combined effects of the interparticle nanofibrous structure, which provided high surface and porous channels. These allowed access to active sites as well as ease of gas diffusion and overlapping of the hole accumulation layers along the fiber direction producing a continuous hole transfer channels. The detailed ethanol sensing mechanism of these NFs is also discussed. DA - 2020-04 DB - ResearchSpace DP - CSIR KW - Ethanol KW - Electrospinning KW - p-type KW - LaCoO3 nanofiber LK - https://researchspace.csir.co.za PY - 2020 SM - 0925-4005 T1 - Design of porous p-type LaCoO3 nanofibers with remarkable response and selectivity to ethanol at low operating temperature TI - Design of porous p-type LaCoO3 nanofibers with remarkable response and selectivity to ethanol at low operating temperature UR - http://hdl.handle.net/10204/11376 ER - en_ZA


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