This paper reviews the recent development of surface-reaction-limited pulsed chemical vapor deposition (SPCVD) technique for the growth of TiO2 one-dimensional nanostructures. SPCVD uses separated TiCl4 and H2O precursor pulses, and the anisotropic growth of TiO2 crystals is attributed to the combined effects of surface recombination and HCl restructuring at high temperature during elongated pu...

Electrical and optical properties of low-temperature, plasma enhanced chemical vapour deposited films of TiO2 have been studied; the source gases were TiCl4 and O2. The amorphous, as-deposited films had a dielectric constant ∼33 consistent with their measured density of 3.2 ± 0.2 g cm−3. Films deposited using a −41 V substrate bias contained the anatase phase and some rutile as evidenced from i...

Oxygen fugacity has been calculated for rutile–ilmenite assemblages from the reaction 2Fe2O3 (in ilmenite) C 4TiO2 (rutile) D 4FeTiO3 (in ilmenite) C O2. The equation log f O2 D 22:59 25925=T 3:09 log T C 0:0016535P C 48:836P=T 4 log a FeTiO3 C 2 log a Fe2O3 C 4 log a TiO2 , where T is in kelvin and P is in kbar, was derived from available thermodynamic data. The hypothetical end-member rutile–...

Poly(vinylidene fluoride) (PVDF) with commercial rutile-TiO2, SiO2, α-Al2O3, and Fe3O4 nanoparticles were prepared via extrusion using different contents, from 0.1 to 10 wt.%. The effect of the in matrix on several material characteristics, such as thermal mechanical properties, crystallinity degree, permeability CO2, examined. X-ray diffraction infrared analyses revealed that successful incorp...

We present an ab initio calculation of the electron energy loss spectrum of rutile TiO2 in the energy range of 0 to 60 eV, focusing our interest on the excitation from the titanium 3p semicore levels. The results are compared to our measurements. Local field effects turn out to be crucial at those energies, and their inclusion in the calculation yields excellent agreement between theory and exp...

The kinetic energy of keV electrons backscattered from a rutile (TiO2) surface depends measurably on the mass of the scattering atom. This makes it possible to determine separately the angular distribution of electrons backscattered elastically from either Ti or O. Diffraction effects of these backscattered electrons inside the rutile crystal lead to the formation of Kikuchi patterns. The eleme...

tio2 nanorods can be used as dye-sensitized solar cells and as various sensors and photocatalysts. these nanorods are synthesized by a using thermal corrosion process in a naoh solution at 200 oc with tio2 powder as a source material. in the present work, the synthesis of tio2 nanorods in anatase, rutile and ti8o15 phases and the synthesis of tio2 nanorods by using the sol-gel method and alkali...

This paper describes high porosity titanium dioxide (TiO2) films deposited via atmospheric pressure chemical vapour deposition (APCVD) using tetraisopropyl titanate at deposition temperatures (Tdep) of 250C and 450C in excess water vapour. Films deposited at low Tdep exhibit a very low refractive index (nfilm) and high porosity (), up to 87% of the bulk rutile phase. High-temperature sinteri...

Practical photocatalysis for degradation of organic pollutants must take into account the influence of other chemicals. Significant Al deposition on titania can occur at naturally occurring concentrations of dissolved Al. This paper reviews the author’s work on the influence of deliberately deposited hydrous oxides of aluminium on the behavior of a ~130 m g rutile TiO2, and then compares the be...