Synthesis and gas sensing properties of hierarchical meso-macroporous SnO2 for detection of indoor air pollutants

被引：60
作者：
Li, Huihua [1 ,2 ]
Meng, Fanli [1 ]
Liu, Jinyun [1 ]
Sun, Yufeng [1 ,3 ]
Jin, Zhen [1 ]
Kong, Lingtao [1 ]
Hu, Yanjiao [4 ]
Liu, Jinhuai [1 ]
机构：
[1] Chinese Acad Sci, Inst Intelligent Machines, Res Ctr Biomimet Funct Mat & Sensing Devices, Hefei 230031, Peoples R China
[2] Univ Sci & Technol China, Dept Chem, Hefei 230026, Peoples R China
[3] Anhui Polytech Univ, Dept Mech & Automot Engn, Wuhu 241000, Peoples R China
[4] Qingdao Univ Med Coll, Affiliated Hosp, Dept Pathol, Qingdao 266000, Peoples R China
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2012年 / 166卷
基金：
中国国家自然科学基金;
关键词：
Meso-macroporous; Hierarchical structure; SnO2; Carbonaceous sphere; Indoor air pollutant; MESOPOROUS SNO2; CARBON NANOTUBES; HOLLOW SPHERES; FAST-RESPONSE; SENSOR; SENSITIVITY; PERFORMANCE; NANOWIRES; HYDROGEN;
D O I：
10.1016/j.snb.2012.02.098
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Hierarchical meso-macroporous SnO2 was synthesized by a sol-gel process using carbonaceous spheres as sacrificial templates. The morphology of meso-macroporous structures can be controlled by adjusting the sintering temperature. Compared with the traditional SnO2, the hierarchical meso-macroporous SnO2 exhibited higher gas response and shorter response and recovery times in detecting indoor air pollutants including ethanol, benzene and toluene. With regard to the gas sensing property, mesopores provide plenty of active sites for surface chemical reactions, on the one hand. On the other hand, the gas diffusion in the sensing film can be improved by macropores greatly. The morphology and structures were characterized by field emission scanning electron microscopy (SEM), transmission electron microscopy (TEM). X-ray diffraction (XRD), thermogravimetric analysis (TGA) and Brunauer-Emmett-Teller (BET) respectively. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：519 / 525
页数：7
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