Tshabalala, Zamaswazi PShingange, KatekaniDhonge, Baban, PNtwaeaborwa, OMMhlongo, Gugu HMotaung, David E2017-08-312017-08-312016-07Tshabalala, Z.P., Shingange, K, Dhonge, B.P., Ntwaeaborwa, O.M., Mhlongo, G.H. and Motaung, D.E. 2016. Fabrication of ultra-high sensitive and selective CH4 room temperature gas sensing of TiO2nanorods: Detailed study on the annealing temperature. Sensors and Actuators B: Chemical, 238, pp 402-4190925-4005http://www.sciencedirect.com/science/article/pii/S0925400516310577http://hdl.handle.net/10204/9512Copyright: 2016 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, please consult the publisher's website. The definitive version of the work is published in Sensors and Actuators B: Chemical, 238, pp 402-419Applications of ultra-highly sensitive and selective methane (CH(sub4)) room temperature gas sensors are important for various operations especially in underground mining environment. Therefore, this study is set out to investigate the effect of annealing temperature on the sensitivity and selectivity of TiO(sub2)-based sensors for detection of CH(sub4) gas at room temperature. TiO2 nanoparticles synthesized using hydrothermal methods were annealed at various temperatures. Surface morphology analyses revealed that the nanoparticles transformed to nanorods after annealing at 700 °C. The results showed that the sensing properties are annealing temperature dependent. The 1.0 M TiO(sub2) nanostructures annealed at higher temperatures (700 °C) revealed improved sensing response to CH(sub4) gas at room temperature due to higher surface area of 180.51 m(sup2) g(sup-1) and point defects related to Ti(sup3+) observed from electron paramagnetic resonance (EPR) and photoluminescence (PL) analyses. In addition, the 1.0 M TiO2 sensing material annealed at 700 °C also revealed an excellent sensitivity and selectivity to CH(sub4) gas at room temperature compared to other gases (H(sub2), NH(sub3), and NO(sub2)), indicating that the TiO2 nanoparticles are possible candidates for motoring CH(sub4) at low concentration of ppm level.enTiO(sub2)NanorodsAnnealingCH(sub4)SelectivityGas sensingArticleTshabalala, Z. P., Shingange, K., Dhonge, B., Ntwaeaborwa, O., Mhlongo, G. H., & Motaung, D. E. (2016). Fabrication of ultra-high sensitive and selective CH4 room temperature gas sensing of TiO2nanorods: Detailed study on the annealing temperature. http://hdl.handle.net/10204/9512Tshabalala, Zamaswazi P, Katekani Shingange, Baban Dhonge, OM Ntwaeaborwa, Gugu H Mhlongo, and David E Motaung "Fabrication of ultra-high sensitive and selective CH4 room temperature gas sensing of TiO2nanorods: Detailed study on the annealing temperature." (2016) http://hdl.handle.net/10204/9512Tshabalala ZP, Shingange K, Dhonge B, Ntwaeaborwa O, Mhlongo GH, Motaung DE. Fabrication of ultra-high sensitive and selective CH4 room temperature gas sensing of TiO2nanorods: Detailed study on the annealing temperature. 2016; http://hdl.handle.net/10204/9512.TY - Article AU - Tshabalala, Zamaswazi P AU - Shingange, Katekani AU - Dhonge, Baban, P AU - Ntwaeaborwa, OM AU - Mhlongo, Gugu H AU - Motaung, David E AB - Applications of ultra-highly sensitive and selective methane (CH(sub4)) room temperature gas sensors are important for various operations especially in underground mining environment. Therefore, this study is set out to investigate the effect of annealing temperature on the sensitivity and selectivity of TiO(sub2)-based sensors for detection of CH(sub4) gas at room temperature. TiO2 nanoparticles synthesized using hydrothermal methods were annealed at various temperatures. Surface morphology analyses revealed that the nanoparticles transformed to nanorods after annealing at 700 °C. The results showed that the sensing properties are annealing temperature dependent. The 1.0 M TiO(sub2) nanostructures annealed at higher temperatures (700 °C) revealed improved sensing response to CH(sub4) gas at room temperature due to higher surface area of 180.51 m(sup2) g(sup-1) and point defects related to Ti(sup3+) observed from electron paramagnetic resonance (EPR) and photoluminescence (PL) analyses. In addition, the 1.0 M TiO2 sensing material annealed at 700 °C also revealed an excellent sensitivity and selectivity to CH(sub4) gas at room temperature compared to other gases (H(sub2), NH(sub3), and NO(sub2)), indicating that the TiO2 nanoparticles are possible candidates for motoring CH(sub4) at low concentration of ppm level. DA - 2016-07 DB - ResearchSpace DP - CSIR KW - TiO(sub2) KW - Nanorods KW - Annealing KW - CH(sub4) KW - Selectivity KW - Gas sensing LK - https://researchspace.csir.co.za PY - 2016 SM - 0925-4005 T1 - Fabrication of ultra-high sensitive and selective CH4 room temperature gas sensing of TiO2nanorods: Detailed study on the annealing temperature TI - Fabrication of ultra-high sensitive and selective CH4 room temperature gas sensing of TiO2nanorods: Detailed study on the annealing temperature UR - http://hdl.handle.net/10204/9512 ER -