Enhanced Gas Sensing Properties of SnO2 Hollow Spheres Decorated with CeO2 Nanoparticles Heterostructure Composite Materials

被引：303
作者：
Liu, Jiangyang [1 ]
Dai, Mingjun [1 ]
Wang, Tianshuang [1 ]
Sun, Peng [1 ]
Liang, Xishuang [1 ]
Lu, Geyu [1 ]
Shimanoe, Kengo [2 ]
Yamazoe, Noboru [2 ]
机构：
[1] Jilin Univ, Coll Elect Sci & Engn, 2699 Qianjin St, Changchun 130012, Peoples R China
[2] Kyushu Univ, Fac Engn Sci, Dept Energy & Mat Sci, Kasuga, Fukuoka 8168580, Japan
来源：
ACS APPLIED MATERIALS & INTERFACES | 2016年 / 8卷 / 10期
关键词：
CeO2/SnO2; composites; heterostructure; hollow spheres; gas sensor; sensing mechanism; METAL-OXIDES; SENSORS; NANOSHEETS; NANOCRYSTALS; FABRICATION; NANOWIRES; NANORODS; BEHAVIOR; ETHANOL; ROUTE;
D O I：
10.1021/acsami.6b00169
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
CeO2 decorated SnO2 hollow spheres were successfully synthesized via a two-step hydrothermal strategy. The morphology and structures of as-obtained CeO2/SnO2 composites were analyzed by various kinds of techniques. The SnO2 hollow spheres with uniform size around 300 rim were self-assembled with SnO2 nanoparticles and were hollow with a diameter of about 100 nm. The CeO2 nanoparticles on the surface of SnO2 hollow spheres could be clearly observed. X-ray photoelectron spectroscopy results confirmed the existence of Ce3+ and the increased amount of both chemisorbed oxygen and oxygen vacancy after the CeO2 decorated. Compared with pure SnO2 hollow spheres, such, composites revealed excellent enhanced sensing properties to ethanol. When the ethanol concentration was 100 ppm, the sensitivity of the CeO2/SnO2 composites was 37, which was 2.65-times higher than that of the primary SnO2 hollow spheres. The sensing mechanism of the enhanced gas sensing properties Was also discussed.
引用
收藏
页码：6669 / 6677
页数：9
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