6533b82bfe1ef96bd128d716
RESEARCH PRODUCT
Photocatalytic thin films of TiO2 formed by a sol-gel process using titanium tetraisopropoxide as the precursor
Vittorio LoddoVincenzo AugugliaroGiuseppe MarcìA. Di PaolaM. AddamoElisa I. García-lópezLeonardo Palmisanosubject
AnataseSettore ING-IND/24 - Principi Di Ingegneria ChimicaMaterials sciencebusiness.industryScanning electron microscope2-Propanol photodegradation Dip-coating Structural properties Thin film Titanium dioxideMetals and AlloysSurfaces and InterfacesDip-coatingSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsTitanium oxidechemistry.chemical_compoundOpticsChemical engineeringchemistryTitanium dioxideMaterials ChemistryPhotocatalysisDip-coating Titanium dioxide Thin film 2-propanol Photodegradation Structural propertiesSettore CHIM/07 - Fondamenti Chimici Delle TecnologieThin filmbusinessSol-geldescription
Abstract Thin TiO 2 films were prepared with the dip-coating technique by using sols deriving from titanium tetraisopropoxide. TiO 2 films were formed on glass substrates previously covered by a SiO 2 layer obtained from a tetraethylortosilicate sol. The films, after a thermal treatment at 673 K, mainly consisted of TiO 2 anatase. The samples were characterised by X-ray diffraction, UV–Vis spectroscopy, scanning electron microscopy and atomic force microscopy. The photoactivity of the various films was tested by using as probe reaction the photo-oxidation of 2-propanol in gas-solid regime. The photoreactivity results indicated that the TiO 2 films were efficient for degrading 2-propanol under UV illumination, propanone being the only compound detected as intermediate product. Films prepared by using Degussa P25 appeared to be more photoactive, but the coating was easily detached by wiping.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-04-01 |