NDLI: Synthesis and photocatalytic properties of dense and porous TiO2-anatase thin films prepared by sol-gel

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Synthesis and photocatalytic properties of dense and porous TiO2-anatase thin films prepared by sol-gel

Content Provider	Semantic Scholar
Author	Arconada, Noemí Durán, Alicia Suarez, Silvia Portela, Raquel Coronado, Juan M. Sánchez, Benigno Castro, Yolanda
Copyright Year	2009
Abstract	Abstract Porous TiO 2 -anatase films were prepared by sol–gel route showing higher photocatalytic activity in degradation of trichloroethylene (TCE) in air compared to dense titania films. Titania sols were synthesized with and without a pore generating agent, polyethylene glycol (PEG), to evaluate the effect of porosity in the photocatalytic activity of the coatings. The films were deposited by dipping and sintered at different temperature and time. The characterisation was performed by profilometry, Fourier transform infrared spectroscopy (FTIR), grazing X-ray diffraction (GXRD) and field emision scan electron microscopy (FE-SEM), observing that anatase phase is obtained at temperatures as low as 350 °C. The maximum specific surface area ( S s = 43 m 2 /g) was obtained for coatings prepared from TiO 2 sol with PEG and sintered at 400 °C. Porous TiO 2 -anatase films present TCE conversion around 20% higher than that of dense films. Porous volume, surface area and thickness of the coating play a key role in the photocatalytic activity. On the other side, variation in particle size seems not to be a critical parameter in the studied range.
Starting Page	1
Ending Page	7
Page Count	7
File Format	PDF HTM / HTML
DOI	10.1016/j.apcatb.2008.07.021
Volume Number	86
Alternate Webpage(s)	http://digital.csic.es/bitstream/10261/23638/3/ArconadaAppCatB-postprint_2009.pdf
Alternate Webpage(s)	https://doi.org/10.1016/j.apcatb.2008.07.021
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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