Reduced Graphene Oxide Mediated SnO_2 Nanocrystals for Enhanced Gas-sensing Properties  

作　　者：Yanhong Chang Yunfeng Yao Bin Wang Hui Luo Tianyi Li Linjie Zhi 

机构地区：[1]School of Civil and Environmental Engineering, University of Science and Technology Beijing [2]National Center for Nanoscience and Technology [3]School of Chemical and Biological Engineering, University of Science and Technology Beijing

出　　处：《Journal of Materials Science & Technology》2013年第2期157-160,共4页材料科学技术（英文版）

基　　金：supported by the University of Science and Technology Beijing;National Center for Nanoscience and Technology Beijing;the National Basic Research Program of China (No.2007CB714304)

摘　　要：SnO2-reduced graphene oxide （SnO2-rGO） composites were prepared via a hydro-thermal reaction of graphene oxide （GO） and SnCI2·2H2O in the mixed solvent of ethylene glycol and water. During the redox reaction, GO was reduced to rGO while Sn2＋ was oxidized to Sn02, uniformly depositing on the surface of rGO sheets. The composites were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, thermogravimetric analysis （TGA）, infrared spectra analysis （IR） and transmission electron microscopy （TEM）, respectively, and their gas sensing properties were further investigated. Compared with pure SnO2 nanoparticles, the as-prepared SnO2-rGO gas sensor and response-recovery time to ethanol and H2S at responding and low cost SnO2-rGO gas sensor could showed much better gas sensing behavior in sensitivity ow concentrations. Overall, the highly sensitive, quick- be potentially applied in environmental monitoring area.SnO2-reduced graphene oxide （SnO2-rGO） composites were prepared via a hydro-thermal reaction of graphene oxide （GO） and SnCI2·2H2O in the mixed solvent of ethylene glycol and water. During the redox reaction, GO was reduced to rGO while Sn2＋ was oxidized to Sn02, uniformly depositing on the surface of rGO sheets. The composites were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, thermogravimetric analysis （TGA）, infrared spectra analysis （IR） and transmission electron microscopy （TEM）, respectively, and their gas sensing properties were further investigated. Compared with pure SnO2 nanoparticles, the as-prepared SnO2-rGO gas sensor and response-recovery time to ethanol and H2S at responding and low cost SnO2-rGO gas sensor could showed much better gas sensing behavior in sensitivity ow concentrations. Overall, the highly sensitive, quick- be potentially applied in environmental monitoring area.

关 键 词：SnO2-rGO Gas sensor Sensitivity Response-recovery time 

分 类 号：O614.432[理学—无机化学] TB383.1[理学—化学]