Reduced Graphene Oxide Mediated SnO2 Nanocrystals for Enhanced Gas-sensing Properties
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2013年第2期
论文作者：Yanhong Chang Yunfeng Yao Bin Wang Hui Luo Tianyi Li Linjie Zhi
文章页码：157 - 160
摘 要：SnO2 ereduced graphene oxide （SnO2-rGO） composites were prepared via a hydro-thermal reaction of graphene oxide （GO） and SnCl2·2H2O in the mixed solvent of ethylene glycol and water. During the redox reaction, GO was reduced to rGO while Sn2+ was oxidized to SnO2, 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 showed much better gas sensing behavior in sensitivity and response-recovery time to ethanol and H2S at low concentrations. Overall, the highly sensitive, quickresponding and low cost SnO2-rGO gas sensor could be potentially applied in environmental monitoring area.
Yanhong Chang1，Yunfeng Yao1,2，Bin Wang2，Hui Luo3，Tianyi Li1，Linjie Zhi2
1. School of Civil and Environmental Engineering, University of Science and Technology Beijing2. National Center for Nanoscience and Technology3. School of Chemical and Biological Engineering, University of Science and Technology Beijing
摘 要：SnO2 ereduced graphene oxide （SnO2-rGO） composites were prepared via a hydro-thermal reaction of graphene oxide （GO） and SnCl2·2H2O in the mixed solvent of ethylene glycol and water. During the redox reaction, GO was reduced to rGO while Sn2+ was oxidized to SnO2, 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 showed much better gas sensing behavior in sensitivity and response-recovery time to ethanol and H2S at low concentrations. Overall, the highly sensitive, quickresponding and low cost SnO2-rGO gas sensor could be potentially applied in environmental monitoring area.
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