gas sensing properties of nanocrystalline tungsten oxide synthesized by acid

... 800◦C)response for to 4000 ppm NH3 gas. Please cite this article in press as: T.D. Senguttuvan, et al., Gas sensing properties of nanocrystalline tungsten oxide synthesized by acid precipi-tation method, ... ammonia gas sensing prop-erties of nanocrystalline tungsten oxide with and withoutplatinumdoping under different processing conditions.2. Experimental Tungsten trioxide powder was prepared by acidic ... reserved.doi:10.1016/j.snb.2010.06.053Please cite this article in press as: T.D. Senguttuvan, et al., Gas sensing properties of nanocrystalline tungsten oxide synthesized by acid precipi-tation method, Sens. Actuators B: Chem. (2010),...

gas - sensing properties of tin oxide doped with metal oxides and carbon

... image of an MWCNTs-doped SnO2sol (c); FE-SEM image of an MWCNTs-doped SnO2(d).Please cite this article in press as: N. Van Hieu, et al., Gas- sensing properties of tin oxide doped with metal oxides ... press as: N. Van Hieu, et al., Gas- sensing properties of tin oxide doped with metal oxides and carbon nanotubes:A competitive sensor for ethanol and liquid petroleum gas, Sens. Actuators B: Chem. ... press as: N. Van Hieu, et al., Gas- sensing properties of tin oxide doped with metal oxides and carbon nanotubes:A competitive sensor for ethanol and liquid petroleum gas, Sens. Actuators B: Chem....

electrical and gas - sensing properties of wo3 semiconductor material

... concentration of NOx gas [6]. However,most reports focused on the NOx gas sensors, and thestudy of sensing to other gases was rare. In this paper,we have investigated the electrical and gas- sensing characteristics ... stability is of signi®cance to apply the sensors to certain control andmonitoring.3.3. Gas- sensing properties In this study, we ®rst examined the eect of calciningtemperature on gas- sensing properties ... (350±800°C) for 1 h in air. Thickness of the sen-sitive bodies after sintering was approximately 0.6±0.8mm.2.4. Measurement of sensing properties The gas- sensing properties were examined in achamber...

gas sensing properties of metal - organics derived pt dispersed - tio2 thin film fired in nh3

... Actuators B 67 2000 270–274 271Fig. 1. Change of gas sensitivity with firing temperature.This paper described the effect of NH on gas sensing 3 properties of Pt dispersed-TiO derived from precursor.22. ... isexplained by the effect of encapsulation or decoration of the metal by the reduced support or electronic interaction of the reduced support with the metal. SMSI decreases theadsorption of H or ... in a sample gas using thewxsame equation as described by Egashira et al. 13 .Crystalline phases in thin films were analyzed by meansŽ. of XRD X-ray Diffraction . Microstructures of some thinŽfilms...

gas sensing properties of nanoparticle indium - doped wo3 thick films

... size of active layers is one of the key factors toenhance the gas sensing properties of semiconductor metal oxide sensors [7,8]. Additionally, the inclusion of differ-ent doping metals in the sensing ... gap of the In-loaded WO3. These energetic levels are the source of addedsupport of charge that changes the sensing properties of theWO3-based sensors.4. ConclusionsThe gas sensing properties ... response of these sensors to nitrogen dioxide haddeﬁnite features. Fig. 1 shows the inﬂuence of the presence of glass frit on the response of un-doped tungsten oxide sen-sors to nitrogen dioxide....

gas sensing properties of wo3 doped rutile tio2 thick film at high operating temperature

... discussionFig. 1 shows SEM images of the sensing films deposited by screen printing. The sensing film exhibited the typical microstruc-ture of screen printed sensing films. A porous sensing film surfacewas ... evident, the innermorphological properties of the sensing film were affected by theWO3doping. Fig. 3 revealed that the sensing films consisted of al-most a single phase of rutile TiO2, while Fig. ... et al., Gas sensing properties of WO3doped rutile TiO2thick film at high operating temperature, Curr. Appl. Phys.(2009), doi:10.1016/j.cap.2009.0 6.053Fig. 1. SEM images of the sensing films.Fig....

research on gas - sensing properties of lead sulfide-based sensor for detection

... 2009Available online xxxKeywords:Nitrogen dioxideAmmonia Gas- sensing properties PbSSensorabstractIn the present paper, the gas- sensing characteristics of novel gas sensors based on PbS were investigated.The ... harmful gases. Nitrogen dioxide is created by the high temper-ature combustion of coal, chemical production, natural gas or oilin power plants and also by the combustion of gasoline in inter-nal ... NH3 -sensing properties of PbS till date.In present paper, the gas- sensing characteristics of PbS wereinvestigated for the nee d to develop sensitive, reliable and low costsensors for toxic gases....

synthesis and optical properties of colloidal tungsten oxide nanorods

... preparation of soluble and highly crystalline tungsten oxide nanorods of varying sizes by a mild, solution-based colloidalapproach.A stirred slurry of 0.70 g of W(CO)6(Strem, 99%), 1.33 g of Me3NO‚2H2O ... beenaccomplished by heating a tungsten foil, covered by SiO2plate, inan argon atmosphere at 1600 °C17or recently by electrochemicallyetching a tungsten tip, followed by heating at 700 ... contamination by platelets, anduncontrolled size hamper systematic investigations on size-depend-ent properties of the oxide nanorod itself as well as of inorganicderivatives prepared from the oxide. ...

thermal treatment effects on the material and gas-sensing properties of room-temperaturetungstenoxidenanorodsensors

... semiconductor gas sensor based onnonstoichiometric tungsten oxide nanorod film, Appl. Phys. Lett. 86 (2005)213105.[12] Y. S. Kim, K. Lee, Material and gas- sensing properties of tungsten oxide nanorodthin-films, ... material and gas- sensing properties of room-temperature tungsten oxide nanorod sensorsYong Shin Kim∗Department of Applied Chemistry, Hanyang University, Ansan 426-791, Republic of Koreaarticle ... purpose of this study is to find thermal treatment con-ditions that can optimize gas- sensing performance in a tungsten oxide nanorod system. In addition, thermal treatment-dependent gas- sensing...

controlled synthesis and gas sensing properties of hollow sea urchin like

... hydrothermal system. To thebest of our knowledge, this is the ﬁrst report of the selectivesynthesis of ␣-Fe2O3superstructures and nanocubes. The gas- sensing properties of the ␣-Fe2O3superstructures, ... reducing gas to the n-typesemiconductors [35]. So, logarithm of the response should be lin-ear with logarithm of gas concentration. Fig. 7b–f displays chart of the logarithm of response of the ... metal oxide- based sensors thechange in resistance is mainly caused by the adsorption and des-orption of gas molecules on the surface of the sensing structure.To understand the origin of the...

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