Ferric Oxide Nanoparticle-functionalized Tungsten Oxide Nanoneedles and their Gas Sensing Properties. (2015)

• Record Type: Journal Article
• Authors: Vallejos, S.; Gràcia, I.; Figueras, E.; Prášek, J.; Sedláček, J.; Pytlíček, Z.; Cané, C.
• Is Part Of: Procedia engineering. Volume 120(2015)
• Page Start: 443
• Page End: 446
• Publication Date: 2015
• Subjects: Tungsten oxide -- functionalization -- ferric oxide -- platinum -- AACVD -- gas sensor; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2015.08.664
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: The aerosol assisted chemical vapor deposition of Fe2 O3 nanoparticle-functionalized tungsten oxide nanoneedles and their gas sensing properties are presented here. Material analysis demonstrates the incorporation of 4 to 15 nm Fe2 O3 nanoparticles at the surface of the tungsten oxide nanoneedles. Gas sensing tests show improved tungsten oxide sensitivity, to toluene, ethanol and hydrogen, with the highest sensitivity (six-fold) to toluene, due to its functionalization with Fe2 O3 . This enhancement is nearly similar to the enhancement obtained when functionalizing tungsten oxide with platinum, suggesting that the sensing performance of tungsten oxide could be improved to a same extent using second-phase nanoparticles of metal oxides, which are less expensive and more abundant than precious metals such as Pt.