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

被引:76
作者
Chang, Yanhong [1 ]
Yao, Yunfeng [1 ,2 ]
Wang, Bin [2 ]
Luo, Hui [3 ]
Lie, Tianyi [1 ]
Zhi, Linjie [2 ]
机构
[1] Univ Sci & Technol Beijing, Sch Civil & Environm Engn, Beijing 100083, Peoples R China
[2] Natl Ctr Nanosci & Technol, Beijing 100190, Peoples R China
[3] Univ Sci & Technol Beijing, Sch Chem & Biol Engn, Beijing 100083, Peoples R China
关键词
SnO2-rGO; Gas sensor; Sensitivity; Response-recovery time; SENSOR; NANOCOMPOSITES; NANOTUBES; MOLECULES; ROUTE; NO2; CO;
D O I
10.1016/j.jmst.2012.11.007
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
SnO2 reduced graphene oxide (SnO2-rGO) composites were prepared via a hydro thermal reaction of graphene oxide (GO) and SnC1(2).2H(2)O 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, quick-responding and low cost SnO2-rGO gas sensor could be potentially applied in environmental monitoring area.
引用
收藏
页码:157 / 160
页数:4
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