P2NG.13 - Quantity and size dependence of Gas sensing properties for the SnO2 nanofiber layer induced by the junctions between the layers

17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
Vienna, Austria
P-2 - Nanomaterials for Gas Sensing
W. Luo, X. Tong, L. Xu, Q. Fu - School of Optical and Electronic Information, Engineering Research Center for Functional Ceramics o f the Ministry of Education, Huazhong University of Science and Technology, Wuhan (China), H. Li - Institute of Acoustics, Chinese Academy of Sciences, Beijing (China)
868 - 869


SnO2 nano-material has been widely investigated for gas sensing in recent years. This research concerned about the unordered SnO2 nano-fiber, which were prepared by far field electrospinning method. The nanofibers with diameters ranging from 54nm to 171nm were synthersized and showed excellant gas sensing properties towards H2S at room temperature. The influences of both the quantity and size of nodes between SnO2 nanofibers on the gas sensing response properties were investigated. It was found that the sensor response to H2S increased with the thickness of the fiber membrane, which is different from the conventional nanocrystalline SnO2 film. The mechanism was suspectred by the increase of the quantity of junctions in the nodes between the fiber connection part. Herein, the nodes diameter were varied by adjusting fiber diameter to verify the unique function of the nodes. The results indicated that the response to H2S increased with the node size. From this, the unique effects of nodes on the gas sensing property of SnO2 nanofibers were verified.