Motaung, David EMhlongo, Gugu HMakgwane, Peter RDhonge, BPCummings, FRSwart, HCRay, Suprakas S2019-03-122019-03-122018-06Motaung, D.E., Mhlongo, G.H., Makgwane, P.R., Dhonge, B.P., Cummings, F.R., Swart, H.C. Ray, S.S. 2018. Ultra-high sensitive and selective H2gas sensor manifested byinterface of n–n heterostructure of CeO2-SnO2nanoparticles. Sensors and Actuators B: Chemical, v.254, pp 984-995.0925-4005https://www.sciencedirect.com/science/article/pii/S0925400517312972http://hdl.handle.net/10204/10784Copyright: 2018 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 websiteDetection of toxic and explosive gases in a selective manner and with higher sensitivity in industries and homes remains very challenging. Therefore, herein, we report on the ultra-high sensitive and selective hydrogen gas sensing using CeO2-SnO2 mixed oxide heterostructure synthesized by a simple hydrothermal method. The BET, photoluminescence, X-ray photoelectron spectroscopy and electron paramagnetic resonance analyses demonstrated that the CeO2-SnO2 heterostructure comprehends a high surface area and a large number of defects related to oxygen vacancies. The formation of heterojunction in CeO2-SnO2nanostructures was confirmed by the non-linear behaviour I–V curve. The gas-sensing characteristics of the CeO2-SnO2 heterostructure showed shorter response and recovery times of approximately 17 and 24s, respectively, together with high sensitivity (19.23 ppm−1) to 40.00 ppm H2 gas at 300°C. The improved H2 gas sensing response of 1323 at 60 ppm H2 gas is correlated with the higher surface area, pore diameter, surface defects and CeO2-SnO2heterojunction emerging at the interfaces between the CeO2 and SnO2 serves as additional reaction sites and as well as exposed facets creating the surface to be extremely reactive for the adsorption of oxygen species. The high H2 gas selectivity observed for the CeO2-SnO2makes them possible candidates for monitoring H2gas at low concentrations (ppm levels).enCeO2SnO2SnO2 heterostructureH2gas sensorsArticleMotaung, D. E., Mhlongo, G. H., Makgwane, P. R., Dhonge, B., Cummings, F., Swart, H., & Ray, S. S. (2018). Ultra-high sensitive and selective H2gas sensor manifested byinterface of n–n heterostructure of CeO2-SnO2nanoparticles. http://hdl.handle.net/10204/10784Motaung, David E, Gugu H Mhlongo, Peter R Makgwane, BP Dhonge, FR Cummings, HC Swart, and Suprakas S Ray "Ultra-high sensitive and selective H2gas sensor manifested byinterface of n–n heterostructure of CeO2-SnO2nanoparticles." (2018) http://hdl.handle.net/10204/10784Motaung DE, Mhlongo GH, Makgwane PR, Dhonge B, Cummings F, Swart H, et al. Ultra-high sensitive and selective H2gas sensor manifested byinterface of n–n heterostructure of CeO2-SnO2nanoparticles. 2018; http://hdl.handle.net/10204/10784.TY - Article AU - Motaung, David E AU - Mhlongo, Gugu H AU - Makgwane, Peter R AU - Dhonge, BP AU - Cummings, FR AU - Swart, HC AU - Ray, Suprakas S AB - Detection of toxic and explosive gases in a selective manner and with higher sensitivity in industries and homes remains very challenging. Therefore, herein, we report on the ultra-high sensitive and selective hydrogen gas sensing using CeO2-SnO2 mixed oxide heterostructure synthesized by a simple hydrothermal method. The BET, photoluminescence, X-ray photoelectron spectroscopy and electron paramagnetic resonance analyses demonstrated that the CeO2-SnO2 heterostructure comprehends a high surface area and a large number of defects related to oxygen vacancies. The formation of heterojunction in CeO2-SnO2nanostructures was confirmed by the non-linear behaviour I–V curve. The gas-sensing characteristics of the CeO2-SnO2 heterostructure showed shorter response and recovery times of approximately 17 and 24s, respectively, together with high sensitivity (19.23 ppm−1) to 40.00 ppm H2 gas at 300°C. The improved H2 gas sensing response of 1323 at 60 ppm H2 gas is correlated with the higher surface area, pore diameter, surface defects and CeO2-SnO2heterojunction emerging at the interfaces between the CeO2 and SnO2 serves as additional reaction sites and as well as exposed facets creating the surface to be extremely reactive for the adsorption of oxygen species. The high H2 gas selectivity observed for the CeO2-SnO2makes them possible candidates for monitoring H2gas at low concentrations (ppm levels). DA - 2018-06 DB - ResearchSpace DP - CSIR KW - CeO2 KW - SnO2 KW - SnO2 heterostructure KW - H2gas sensors LK - https://researchspace.csir.co.za PY - 2018 SM - 0925-4005 T1 - Ultra-high sensitive and selective H2gas sensor manifested byinterface of n–n heterostructure of CeO2-SnO2nanoparticles TI - Ultra-high sensitive and selective H2gas sensor manifested byinterface of n–n heterostructure of CeO2-SnO2nanoparticles UR - http://hdl.handle.net/10204/10784 ER -