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	Development of a sensitive gas sensor by trapping the analytes on nanomaterials and in situ cataluminescence detection
	Wen, Fang ; Zhang, Sichun ; Na, Na ; Wu, Yayan ; Zhang, Xinrong
	2010-10-12 ; 2010-10-12
关键词	Cataluminescence ZrO2 nanoparticles Ethanol Sensor Enrichment SOLID-PHASE EXTRACTION VOLATILE ORGANIC-COMPOUNDS TITANIUM-DIOXIDE ETHANOL CHEMILUMINESCENCE PRECONCENTRATION AIR OXIDATION SURFACE OXIDES Chemistry, Analytical Electrochemistry Instruments & Instrumentation
中文摘要	An optical sensor for ethanol has been proposed by trapping the analytes on sensing nanomaterials at room temperature and detecting them in situ by recording the cataluminescence (CTL) signals with fast elevated temperature. Sensing nanomaterials of ZrO2 were directly deposited on heating filament which enables the temperature programming for trapping and detecting the interested analytes. The miniaturized sensing unit has low incandescent radiation so as to provide the high signal-to-noise ratio. Under the optimized conditions, the linear range for the determination of ethanol vapor is 1.0 X 10(-3) to 1.0 mg L-1. A detection limit (S/N=3) is 2.0 x 10(-4) mg L-1 (0.1 ppm), which is improved about 3000-fold for ethanol compared with previous CTL sensors. The relative standard deviation (RSD) is 1.2% (n = 7) for ethanol samples at a concentration of 0.08 mg L-1. The stability was demonstrated by continuous reaction with ethanol for 120 h. This sensor has been applied to monitor the ethanol concentration in human expired gas after drinking, and the results agreed well with the reference values. This miniature ethanol sensor offers higher sensitivity, faster response and lower power consumption, which make it very promising in developing hand-hold sensing device for field detection. (C) 2009 Elsevier B.V. All rights reserved.
语种	英语 ; 英语
出版者	ELSEVIER SCIENCE SA ; LAUSANNE ; PO BOX 564, 1001 LAUSANNE, SWITZERLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/80805]
专题	清华大学
推荐引用方式 GB/T 7714	Wen, Fang,Zhang, Sichun,Na, Na,et al. Development of a sensitive gas sensor by trapping the analytes on nanomaterials and in situ cataluminescence detection[J],2010, 2010.
APA	Wen, Fang,Zhang, Sichun,Na, Na,Wu, Yayan,&Zhang, Xinrong.(2010).Development of a sensitive gas sensor by trapping the analytes on nanomaterials and in situ cataluminescence detection..
MLA	Wen, Fang,et al."Development of a sensitive gas sensor by trapping the analytes on nanomaterials and in situ cataluminescence detection".(2010).

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