Tshabalala, Zamaswazi PMotaung, David EMhlongo, Gugu HNtwaeborwa, OM2017-07-282017-07-282016-03Tshabalala, ZP, Motaung, DE, Mhlongo, GH. and Ntwaeborwa, OM. 2016. Facile synthesis of improved room temperature gas sensing properties of TiO2 nanostructures: Effect of acid treatment. Sensors and Actuators B: Chemical, 224, pp 841–8560925-4005http://hdl.handle.net/10204/9382Due 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, 224, pp 841–856TiO(sub2) nanoparticles were synthesized via a simple hydrothermal method in a sodium hydroxide (NaOH) aqueous solution and washed with distilled water and different concentrations of hydrochloric acid which acted as the morphological/crystallographic controlling agent. Microscopy analysis showed that the size of the TiO(sub2) nanoparticles could be easily tailored and tuned by varying the HCl concentration. The phase transformation from a mixture of anatase and rutile phases to pure anatase phase was observed at higher HCl concentration. The particle sizes were reduced while the Brunauer–Emmett–Teller surface area increased when increasing the HCl concentration, thus resulting in higher sensing response and selectivity to NO(sub2) at room temperature. The X-ray photoelectron spectroscopy, photoluminescence and electron paramagnetic resonance studies also revealed that the 1.0 M sample contain high relative concentration of oxygen vacancy and Ti(sup4+) and Ti(sup3+) interstitial defect states which played a vital role modulating the sensing properties.enGas sensingMorphologyArticleTshabalala, Z. P., Motaung, D. E., Mhlongo, G. H., & Ntwaeborwa, O. (2016). Facile synthesis of improved room temperature gas sensing properties of TiO2 nanostructures: Effect of acid treatment. http://hdl.handle.net/10204/9382Tshabalala, Zamaswazi P, David E Motaung, Gugu H Mhlongo, and OM Ntwaeborwa "Facile synthesis of improved room temperature gas sensing properties of TiO2 nanostructures: Effect of acid treatment." (2016) http://hdl.handle.net/10204/9382Tshabalala ZP, Motaung DE, Mhlongo GH, Ntwaeborwa O. Facile synthesis of improved room temperature gas sensing properties of TiO2 nanostructures: Effect of acid treatment. 2016; http://hdl.handle.net/10204/9382.TY - Article AU - Tshabalala, Zamaswazi P AU - Motaung, David E AU - Mhlongo, Gugu H AU - Ntwaeborwa, OM AB - TiO(sub2) nanoparticles were synthesized via a simple hydrothermal method in a sodium hydroxide (NaOH) aqueous solution and washed with distilled water and different concentrations of hydrochloric acid which acted as the morphological/crystallographic controlling agent. Microscopy analysis showed that the size of the TiO(sub2) nanoparticles could be easily tailored and tuned by varying the HCl concentration. The phase transformation from a mixture of anatase and rutile phases to pure anatase phase was observed at higher HCl concentration. The particle sizes were reduced while the Brunauer–Emmett–Teller surface area increased when increasing the HCl concentration, thus resulting in higher sensing response and selectivity to NO(sub2) at room temperature. The X-ray photoelectron spectroscopy, photoluminescence and electron paramagnetic resonance studies also revealed that the 1.0 M sample contain high relative concentration of oxygen vacancy and Ti(sup4+) and Ti(sup3+) interstitial defect states which played a vital role modulating the sensing properties. DA - 2016-03 DB - ResearchSpace DP - CSIR KW - Gas sensing KW - Morphology LK - https://researchspace.csir.co.za PY - 2016 SM - 0925-4005 T1 - Facile synthesis of improved room temperature gas sensing properties of TiO2 nanostructures: Effect of acid treatment TI - Facile synthesis of improved room temperature gas sensing properties of TiO2 nanostructures: Effect of acid treatment UR - http://hdl.handle.net/10204/9382 ER -