Reduced Graphene Oxide Mediated SnO2 Nanocrystals for Enhanced Gas-sensing Properties

• Published in: Journal of materials science & technology Vol. 29; no. 2; pp. 157 - 160
• Main Authors: Chang, Yanhong, Yao, Yunfeng, Wang, Bin, Luo, Hui, Li, Tianyi, Zhi, Linjie
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.02.2013
• Subjects: Gas sensor; Response–recovery time; Sensitivity; SnO2–rGO; 复合材料制备; 性能增强; 扫描电子显微镜; 气体传感器; 气敏特性; 氧化石墨; 氧化还原反应; 纳米二氧化锡; SnO2–rGO; Sensitivity; Gas sensor; Response–recovery time
• ISSN: 1005-0302; 1941-1162
• DOI: 10.1016/j.jmst.2012.11.007

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.