Room-temperature hydrogen sensing properties of SnO(2) -coated multi-walled carbon nanotubes

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	Room-temperature hydrogen sensing properties of SnO(2) -coated multi-walled carbon nanotubes
	X. Sun; H. T. Fang; H. L. Yu; Y. Chu; B. Y. Zhang; J. H. Du; D. W. Wang; F. Li; F. P. Wang
	2010
发表期刊	New Carbon Materials
ISSN	1007-8827
卷号	25 期号:3 页码:218-224
摘要	A SnCl(2) solution was used to prepare SnO(2)-coated multi-walled carbon nanotubes (SnO(2)/MWCNTs), and their hydrogen sensing properties at room temperature was studied. SEM and TEM observations indicate that SnO(2) nanoparticles with a size of 5 nm are uniformly coated on the MWCNTs, forming a continuous SnO(2) coating. The SnO(2)/MWCNTs are sensitive to 10(-4) hydrogen at room temperature. During the sensing measurement at room temperature for 10(-3) hydrogen mixed with argon gas, the current change with gas concentration is reversed after the mixed gas is switched to air. This can be ascribed to the reaction between O(2) in air and residual H(2) around the SnO(2)/MWCNTs to form adsorbed H(2)O and the subsequent desorption of H(2)O by substitution adsorption of O(2) in air. The H(2)O adsorption may lead to a decrease of the electric resistance of SnO(2)/MWCNTs and thus an increase of current measured. The reversal of current implies that the SnO(2)/MWCNTs may possess a good sensitivity to humidity at room temperature.
部门归属	[fang hai-tao; yu hui-long; chu yi; zhang bao-you] harbin inst technol, sch mat sci & engn, harbin 150001, peoples r china. [sun xue; wang fu-ping] harbin inst technol, sch sci, harbin 150001, peoples r china. [du jin-hong; wang da-wei; li feng] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;fang, ht (reprint author), harbin inst technol, sch mat sci & engn, harbin 150001, peoples r china;htfang@hit.edu.cn
关键词	Sno(2) Coat Multi-wall Carbon Nanotubes Hydrogen Sensing Properties Tin Oxide Photocatalytic Activity Polyol Process Gas Sensor Composite Nanocomposites Fabrication Performance Electrodes Reduction
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/31460
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. Sun,H. T. Fang,H. L. Yu,et al. Room-temperature hydrogen sensing properties of SnO(2) -coated multi-walled carbon nanotubes[J]. New Carbon Materials,2010,25(3):218-224.
APA	X. Sun.,H. T. Fang.,H. L. Yu.,Y. Chu.,B. Y. Zhang.,...&F. P. Wang.(2010).Room-temperature hydrogen sensing properties of SnO(2) -coated multi-walled carbon nanotubes.New Carbon Materials,25(3),218-224.
MLA	X. Sun,et al."Room-temperature hydrogen sensing properties of SnO(2) -coated multi-walled carbon nanotubes".New Carbon Materials 25.3(2010):218-224.