One-step synthesis and gas sensing properties of hierarchical Cd-doped SnO2 nanostructures

被引:122
作者
Sun, Peng [1 ]
Zhou, Xin [1 ]
Wang, Chen [1 ]
Wang, Biao [2 ]
Xu, Xiumei [1 ]
Lu, Geyu [1 ]
机构
[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China
[2] Chinese Acad Sci, State Key Lab Luminescence & Applicat, Changchun Inst Opt Fine Mech & Phys, Changchun 130033, Peoples R China
来源
SENSORS AND ACTUATORS B-CHEMICAL | 2014年 / 190卷
关键词
Cd-doped SnO2; Hydrothermal method; Nanorod; Gas sensor; ROOM-TEMPERATURE; SELECTIVE DETECTION; NANOWIRES; NANOBELTS; NANORODS; SENSOR; NANOSENSORS; MECHANISM; FILMS; NO2;
D O I
10.1016/j.snb.2013.08.045
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The hierarchical undoped and Cd-doped SnO2 nanostructures had been synthesized via a low-cost and environmentally friendly hydrothermal route. The morphology and structure of the as-prepared product were characterized by X-ray diffraction (XRD), field-emission electron microscopy (FESEM), and transmission electron microscopy (TEM). The images of field-emission electron microscopy and transmission electron microscopy showed that pure and Cd-doped SnO2 hierarchical architectures were built from one-dimensional nanorods. X-ray diffraction (XRD) of the doped samples revealed that Cd incorporation led to lattice deformation without destroying the original crystal structure. Gas sensors based on undoped and Cd-doped SnO2 nanorods were fabricated, and their gas sensing properties were tested for various gases. The 3.0 wt% Cd-doped SnO2 based sensor showed excellent selectivity toward H2S at the operating temperature 275 degrees C, giving a response of about 31-10 ppm, which was about 22 times higher than that of sensor based on pure SnO2. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:32 / 39
页数:8
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