Hexagonal WO3 Films with Carbon Nanotubes for Sensing Applications

Csaba Balázsi; Radu Ionescu; Katarína Sedlácková

doi:10.4028/www.scientific.net/MSF.589.67

Paper Titles

Estimation and Consequences of Shrinkage of Steel
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ATIG Welding of Duplex Steel
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The Optimization of Heating the Billets in the Mills
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Biopolymer-Hydroxyapatite Nanocomposite from Eggshell for Prospective Surgical Applications
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Hexagonal WO₃ Films with Carbon Nanotubes for Sensing Applications
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Qualitative and Quantitative Fractographic Analysis of Dynamically Impacted Si₃N₄ Ceramics
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On the Possible Mechanisms of Porosity Formation during Laser Melt Injection (LMI) Technology
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The Effect of Temperature and Composition to the Rheological Properties of Asphalt Pavements
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Bulk Ultrafine-Grained Nickel Consolidated from Nanopowders
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Hexagonal WO₃ Films with Carbon Nanotubes for Sensing Applications

Abstract:

In this work, nanocrystalline hexagonal tungsten oxide was prepared by acidic precipitation from sodium tungstate solution. TEM studies of nanopowders showed that the average size of the hexagonal nanoparticles is 30-50 nm. Novel nanocomposites were prepared by embedding a low amount of gold decorated carbon nanotubes into the hex-WO3 matrix. The addition of MWCNTs lowered the temperature range of sensitivity of hex-WO3 nanocomposites to NO2 hazardous gas. The sensitivity of hex - WO3 with Au-decorated MWCNTs to NO2 is at the temperature range between 25°C and 250°C.