Electrical and humidity sensing properties of Chromium(III) oxide–tungsten(VI) oxide composites

Pokhrel, Suman; Nagaraja, K.S.

doi:10.1016/s0925-4005(03)00251-x

Cited by 73 publications

(34 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The corresponding gas sensing mechanisms are now well established. By contrast, Cr 2 O 3 gas sensors with p-type semiconducting behaviour have scarcely been investigated, although a few studies have reported gas sensing characteristics of Cr 2 O 3 (Miremadi et al 1994;Dawson et al 1995;Jayaraman et al 1999;Chabanis et al 2001;Pokhrel and Nagaraja 2003;Naisbitt et al 2006;Pokhrel et al 2007;Suryawanshi et al 2008). In the present investigation, the surface of Cr 2 O 3 sensor has been activated by SnO 2 and its effect on sensor response to ethanol vapours and liquefied petroleum gas (LPG) has been studied.…”

Section: Introductionmentioning

confidence: 85%

Ethanol and LPG sensing characteristics of SnO2 activated Cr2O3 thick film sensor

et al. 2010

View full text Add to dashboard Cite

The sensing response of pure and SnO 2 activated Cr 2 O 3 to ethanol vapours and liquefied petroleum gas (LPG) has been investigated. Fine particles of commercial chromium oxide powder were selected and deposited as thick film to act as a gas sensor. The sensor surface has been activated by tin dioxide, on surface oxidation of tin chloride. The concentration of tin chloride solution, used as activator, was varied from 0 to 5% and its effect on gas response, selectivity and operating temperature has been studied. It was found that response to ethanol vapours significantly improved, whereas response to LPG remained unaffected. Moreover, operating temperature remains unchanged both for LPG and ethanol vapours.

show abstract

Section: Introductionmentioning

confidence: 85%

Ethanol and LPG sensing characteristics of SnO2 activated Cr2O3 thick film sensor

et al. 2010

View full text Add to dashboard Cite

show abstract

“…This is the basis of the gas sensors for flammable gases. [38] Analogous treatments to those outlined above can be presented for n-type semiconducting oxides in which the compensating defects are interstitial cations (e.g. ZnO) and for p-type semiconductors.…”

Section: In This Case [V Omentioning

confidence: 99%

“…[225] As a result, metal oxides have been widely investigated as possible sensing materials for a wide range of gases [226,227] exploiting the inherent properties of these materials such as semiconductivity. A wide range of different metal oxides [223,[228][229][230][231][232][233] and mixed oxides [38,228,229,232,234,235] have been investigated; however, tin oxide is probably the most common system due to the numerous gases it shows a response to. For example, tin oxide has been shown to respond to a wide range of flammable gases, including carbon monoxide, [236][237][238] hydrocarbons, [238][239][240] hydrogen [241,242] and other pollutant gases such as hydrogen sulfide [239,243] and nitrous oxides.…”

Section: Gas Sensorsmentioning

confidence: 99%

Metal Oxide Nanoparticles

Chadwick

Savin

2010

Low‐Dimensional Solids

View full text Add to dashboard Cite

“…Since that time, many commercial devices exploiting this phenomenon have been developed [49], and whilst several different oxides [47,[50][51][52][53][54][55][56][57][58] have been investigated in the role, tin oxide has been the most widely used.…”

Section: Nanoionic Materials As Gas Sensorsmentioning

confidence: 99%

Ion‐Conducting Nanocrystals: Theory, Methods, and Applications

Chadwick

Savin

2009

Solid State Electrochemistry I

View full text Add to dashboard Cite

The aim of this chapter is to review the current state of knowledge in ionic materials with crystallite dimensions less than 100 nm, systems which sometimes are referred to as nanoionics. The chapter will detail the preparation, characterization and the important applications of these materials, especially in sensors, solid-state batteries, and fuel cells. Particular focus will be placed on ionic transport in these materials, as this is a topic of considerable contemporary interest, and where conflicting reports exist of enhanced diffusion in nanocrystals. IntroductionNanomaterials are systems that contain particles with one dimension in the nanometer regime. The past decade has witnessed a growing intense interest from biologists, chemists, physicists, and engineers in the application of these materialsthe so-called nanotechnology, which is sometimes referred to as the next industrial revolution [1]. The reasons for such interest are the unusual properties and potential technological applications that are exhibited by these materials when compared to their bulk counterparts [2][3][4][5][6][7][8][9][10]. In this chapter, attention will be focused on rather simple ionic solids, where the interatomic attractions are predominantly coulombic forces, and the dimensions are predominantly <100 nm. Such systems have been termed nanoionics [11,12].There are three dominant reasons for the study of these particular systems:. The simplicity of the interatomic forces means that some of the generic features and problems of nanomaterials should be tractable to theoretical and/or computer modeling approaches for these particular systems. . Many relatively simple ionic compounds, such as binary halides and oxides, in their bulk form have important technological applications as electrolytes, catalysts, Solid State Electrochemistry I: Fundamentals, Materials and their Applications. Edited by Vladislav V. Kharton

show abstract

Electrical and humidity sensing properties of Chromium(III) oxide–tungsten(VI) oxide composites

Cited by 73 publications

References 23 publications

Ethanol and LPG sensing characteristics of SnO2 activated Cr2O3 thick film sensor

Ethanol and LPG sensing characteristics of SnO2 activated Cr2O3 thick film sensor

Metal Oxide Nanoparticles

Ion‐Conducting Nanocrystals: Theory, Methods, and Applications

Contact Info

Product

Resources

About