Applied Surface Science, Vol.487, 272-277, 2019
Facile fabrication of WO3/MWCNT hybrid materials for gas sensing application
Hybrid materials of tungsten oxide (WO3) and multi-walled carbon nanotubes (MWCNTs) were fabricated by a facile method using acid precipitation route. Ammonium tungstate para-pentahydrate was supplied to a designated amount of MWCNTs to prepare a precipitate of tungsten compound hybridizing with MWCNT surface in prior to calcination with air in a temperature range of 300-600 degrees C. Morphology, crystalline, functional groups on surface, porosity and thermal stability of synthesized hybrid material were characterized by SEM, XRD, Fourier transform Raman spectroscopy, TGA and BET analyses. It could be confirmed that the prepared WO3/MWCNT hybrid materials possessed very high BET surface area and mesoporous characteristics with good thermal stability which would be beneficial to their application as thick-film sensors.