The alcohol-sensing behaviour of SnO2 nanorods prepared by a facile solid state reaction

3rd International Conference on Advanced Materials Research and Applications

Gao, F.^1 ; Ren, X.P.^2 ; Wan, W.J.^1 ; Zhao, Y.P.^1 ; Li, Y.H.^3 ; Zhao, H.Y.^1,4

School of Materials Science and Engineering, Yunnan University, Kunming

650091, China^1

Yunnan Security and Technology Co. Ltd., Kunming

650033, China^2

Advanced Measurement and Analysis Center, Dali University, Dali

671200, China^3

Yunnan Key Laboratory for Micro/Nano Materials and Technology, Kunming

650091, China^4

关键词: Alcohol sensing;    Calcination temperature;    Calcined temperature;    Gas sensing;    Non-stoichiometric ratio;    Oxygen surface;    Structure and morphology;    Surface area;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/170/1/012002/pdf
DOI  :  10.1088/1757-899X/170/1/012002

来源: IOP

【 摘 要 】

SnO2nanorods with the range of 12-85 nm in diameter were fabricated by a facile solid state reaction in the medium of NaCl-KCl mixture at room temperature and calcined at 600, 680, 760 and 840oC, respectively. The XRD, TEM and XPS were employed to characterize the structure and morphology of the SnO2nanorods. The influence of the calcination temperature on the gas sensing behaviour of the SnO2nanorods with different diameter was investigated. The result showed that all the sensors had good response to alcohol. The response of the gracile nanorods prepared at a low calcined temperature demonstrated significantly better than the thick nanorods prepared at a high calcined temperature. The mechanism was attributed to the nonstoichiometric ratio of Sn/O and larger surface area of the gracile nanorods to enhance the oxygen surface adsorption.