TiO2 anatase

Busch, K.W. et al.. Residual changes in the surface charge of TiO2 (anatase) suspensions as a result of exposure to a 44 MHz radiofrequency electric field. Colloid Polym. Sci., 273, 1186. 1995. 

Schindler, P.W. and Gamsjager, H., Acid-base reactions of the TiO2 (anatase)-water interface and the point of zero charge of TiO2 suspensions, KolloidZ. Z. Polym., 250, 759, 1972. 

The commercial catalysts are constituted by anatase TiO2 with V2O5 and WO3 (or... 

Gratzel et al. demonstrated a wide variety of organophosphorus pesticides, including paraoxon, parathion, and malathion, which possess aromatic side chains and/or sulfur atoms can be totally decomposed into carbon dioxide and the corresponding mineral acids by irradiation in a solar simulator in the presence of anatase TiO2 suspensions [41]. The balanced equation based on carbon dioxide evolution for the mineralization of parathion is represented by Eq. (6) ... 

According to this rule, rutile and, at high pressures, the modification with the cz-PbO2 structure are the most stable forms of TiO2. Numerous compounds crystallize in the rutile type and some in the a-PbO2 type, whereas scarcely any examples are known for the brookite and the anatase structures. 

Carefully prepared Au catalysts have a relatively narrow particle size distribution, giving mean diameters in the range 2-10 nm with a standard deviation of about 30%. A major reason why Au particles remain as NPs even after calcination 573 K is the epitaxial contact of Au NPs with the metal oxide supports. Gold particles always expose its most densely packed plane, the (111) plane, in contact with a-Fe2O3(110), Co304(lll), anatase Ti02(112), and rutile TiO2(110). 

It is comforting that the elemental rules for predicting surface terminations outlined in section 3.1.1. work so well for predicting the structure of the (1x1) terraces and the step edges of all the orientations of both rutile and anatase. The extensive theoretical work has helped to refine the understanding of surface relaxations, and the level of detail on the atomic geometry of the TiO2(110) surface is certainly comparable to that of certain elemental semiconductors or metals. 

The optical properties of rutile and anatase TIO2 are different in that anatase is more reflective than rutile at 380 nm and rutile Is very strongly UV-absorb-ent at 380 nm tFigure 2). (JL) The optical properties of the various pigments strongly effect photosensitizer absorption and photochemical activity. 

Wang C.-Y., Groenzin H. and Schultz M. J. (2003), Molecular Species on Nanoparticulate Anatase TIO2 Film Detected by Sum Frequency Generation Trace Hydrocarbons and Hydroxyl Groups , Lan mM/r 19, 7330-7334. 

A plethora of synthetic routes, however, is currently being developed. These include Ostwald ripening to build hollow anatase spheres and Au-TiO2 nanocomposites (Li and Zeng, 2006), laser ablation (Tsuji et al., 2007), spray pyrolysis (Taniguchi and Bakenov, 2005), among others. 

The inherent stability of minerals in soils is a function of both equilibrium solubility and kinetic factors. Some minerals, such as anatase (TiO2), have very low equilibrium solubilities and their stability is very high even in well-drained soils under high rainfall. For many minerals, however. 

The kinetics of proton adsorption/desorption on anatase was studied using a pressure jump technique in [179], and rate constants were calculated. Reference [161] presents the kinetics of proton adsorption for TiO2... 

Properties Solid solution rather than mixed phase at >40% RuOj, TiO2 was in rutile form anatase was present at lower RUO2 concentrations for BET specific surface area, see Table 3.1458 [1750]. 

Properties 17-29% TiO2 l y mass, anatase or amorphous, BET specific surface area 16-54 m7g (calcined), 42-92 rn /g (before calcination), XRD patterns and TEM images available [1902],... 

McNamee, C.E., Tsujii, Y, and Matsumoto, M., Physicochemical characterization of an anatase TiO2 surface and the adsoiption of a nonionic surfactant An atomic force microscopy sliidy, Langmuir, 21. 11283, 2005. 

Appearance of crystalline TiOa phase was observed only when Ti02 content reaches 50 mol %. Diffraction pattern of this sample exhibits broad maxima indicating the presence of minor amount anatase phase. The crystallite size of titania in the 50%TiO2-Al2O3 sample estimated from the Scherrer equation shows values around lOOA. No rutile phase was detected in the sample. This picture is essentially different from the pattern yielded by an equimolar mixture of TiOa-AbOs prepared by mechanically mixing parent titania and alumina. 

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