Titanium dioxide single crystals

Titanium Dioxide Single-Crystal and Powder Surfaces in the Presence and Absence of Platinum... 

Decomposition of Higher Alcohols on Titanium Dioxide Single Crystal Surfaces... 

Decomposition of higher alcohols on titanium dioxide single crystal 432... 

Neirinckx, R., Adams, F., Hoste, J. Determination of impurities in titanium and titanium dioxide by neutron activation analysis. Part IV Determination of trace impurities in titanium dioxide single crystals. Anal. C3iim. Acta 48, 1 (1969)... 

Results with oxides tested are compatible with results of Liao et al. for titanium dioxide single crystals (16). It is postulated that the enhancement depertds on the physical form of the oxide type of polymorph present bulk. 

Anatase and mtile are produced commercially, whereas brookite has been produced by heating amorphous titanium dioxide, which is prepared from an alkyl titanate or sodium titanate [12034-34-3] with sodium or potassium hydroxide in. an autoclave at 200—600°C for several days. Only mtile has been synthesized from melts in the form of large single crystals. More recentiy (57), a new polymorph of titanium dioxide, Ti02(B), has been demonstrated, which is formed by hydrolysis of K Ti O to form 20, followed by subsequent calcination/dehydration at 500°C. The relatively open stmcture... 

Semiconductor Electrodes 1. The Chemical Vapor Deposition and Application of Polycrystalline n-Type Titanium Dioxide Electrodes to the Photosensitized Electrolysis of Water Comparison of the behavior of CVD and single crystal n-TiCte presented. 229... 

The titanium dioxide flakes produced by these methods are not single crystal but quite porous and, lacking the mechanical support of a substrate, hence brittle. Therefore, they are not yet used in technical applications in which mechanical stress is exerted. 

The reactions of small organic molecules on titanium dioxide surfaces provide the central focus of these examples. Comparisons with reactions on single crystal surfaces of other oxides illustrate some of the key structural and electronic issues in oxide surface reactivity and the importance of local interactions between surface sites and adsorbed molecules. 

Alcohol decomposition does provide additional insight into the interaction of adsorbates with metal oxide surfaces. The reactions of alkoxides on titanium dioxide have been used to probe thermal and photo-reactivity of powder and single crystal samples. 

Methanol decomposes on titanium dioxide surfaces by mechanisms that are similar to those by which formic acid decomposes. Methanol can reversibly adsorb on single crystal surfaces of titania (reaction 16) in a molecular state, or it may dissociatively adsorb by interaction with surface lattice oxygen anions, forming a surface methoxide (reaction 17). Reaction (18) represents the disproportionation reaction of hydroxyl groups on the surface of the metal oxide. 

Photo-oxidative self-cleaning and antifogging effects of transparent titanium dioxide films has attracted considerable attention for the past decade [334, 335]. In order to understand the photo-induced hydrophilic conversion on titanium dioxide coatings in details, it is inevitably necessary to understand the relationship between the photo reaction and the surface crystal structure this can be done, for example, by an evaluation of the photo-induced hydrophilic conversion on the different crystal faces of rutile single crystals and also... 

In situ electron microscopy studies were performed with overlapping thin films of nickel and titanium dioxide. A nickel film approximately 30 nm thick was prepared by vacuum deposition of the metal onto a single crystal of sodium chloride. The salt was dissolved in distilled water, and the residual metal film was... 

Catalytic reactions on a metal oxide single crystal switchover of the reaction paths in formic acid decomposition on titanium dioxide TiO2(110). J. Am. Chem. Soc., 115, 10460-10461. 

In spite of the fact that it is unsuitable for efficient photoelectrolysis, titanium dioxide continues to attract considerable attention as a model oxide system. Attempts to dope the oxide with transition metals have met with little success, and it is clear that care must be taken to distinguish between the introduction of localized and delocalized states (see references 99 and 100). The electrochemical properties of single-crystal rutile are still being characterized in... 

Two recent variations of this methodology are the synthesis of single crystals of mesoporous niobium and tantalum oxides and the rapid preparation of titanium dioxide solids using sonochemistry. ... 

Titanium dioxide occurs in nature in three crystalline forms, rutile, anatase, and brookite. The crystal structures are shown in Fig. 1 [24]. Some of the physical properties are given in Table 1. Much of the fundamental work on Ti02 has been carried out with rutile single crystals because these are relatively straightforward to produce. Anatase single crystals are more difficult to produce, and some work has been carried out with natural crystals but it is possible to grow such crystals with the use of the vapor-phase transport method [25]. Photocatalytic reactions... 

INTRODUCTION This data sheet contains information for single crystal stoichiometric titanium dioxide. 

Titanium Dioxide (Rutile, Single Crystal), 2.441x10 n =5.913+ 0.803x10 ... 

---