Titanium phosphates

Titanium Phosphates. Titanium(III) phosphate [24704-65-2] (titanous phosphate) is a purple soHd, soluble ia dilute acid, giving relatively stable solutions. It can be prepared by adding a soluble phosphate to titanous chloride or sulfate solution and raising the pH until precipitation occurs. 

Ooi, K., Miyai, Y., Makita, Y, and Kanoh, H., Fractionation of lithium isotopes in ion exchange chromatography with titanium phosphate exchanger, Separation Sci. Technol., 34, 1133, 1999. 

Pt deposited on WS2-Ti02 mesoporous composites was used for visible-light production of H2 in the presence of Na2S as radical scavenger [188]. Pt-loaded mesoporous zirconium-titanium phosphates also displayed good photoactivity in hydrogen production from carbonate solution [189]. 

Kapoor, M.P., Inagaki, S.,and Yoshida, H. (2005) Novel zirconium-titanium phosphates mesoporous materials for hydrogen production by photoinduced water splitting. Journal of Physical Chemistry B, 109 (19), 9231-9238. 

Daugherty, P.S. and Morse, D.E. (2005) Enzymatic synthesis of layered titanium phosphates at low temperature and neutral pH by cell-surface display of silicatein a. Journal of the American Chemical Society, 127, 15749-15755. 

Wang, Q. Zhong, L. Sun, J. Shen, J. 2005. A facile layer-by-layer adsorption and reaction method to the preparation of titanium phosphate. Chem. Mater. 17 3563-3569. 

Titanium phosphates, 25 57 Titanium phosphide(s), 19 58, 25 56-57 Titanium phosphorus-containing chelates, 25 91-92... 

Most previous adsorption studies employing calorimetry have investigated cation exchange phenomena on zirconium phosphates (17-21), titanium phosphate (22) and clay minerals (23,24). 

Bhaumik, A., Inagaki, S. 2001. Mesoporous titanium phosphate molecular sieves with ion-exehange capacity J Am Chem Soe 123 691-696. 

Heteropolyacids are frequently used to modify proton-conducting composites,or they are just dispersed in inert matrixes.However, because the proton conduction mechanism of such hydrated salts is similar to those of hydrated polymeric sys-tems, these composites show qualitatively similar transport properties. The same is true for organically modified inorganic layered compounds such as titanium phosphate sulfophenylenphosphonate, the conductivity of which is dependent on the RH value, in a manner similar to that observed with Nafion. ... 

Sodium phosphate solution white precipitate of titanium phosphate, Ti(HP04)2, in dilute sulphuric acid solution. 

If both Tiand Zr are present, the precipitate of zirconium phosphate may be filtered off (best in the presence of a little macerated filter paper, or a Whatman filtration accelerator), and the filtrate treated with Na2S03 or with Na2S203 solution and warmed. The peroxotitanic acid is reduced and titanium phosphate precipitates. It may be necessary to reduce the acidity of the solution somewhat to precipitate the titanium completely. Zr may also be identified by the alizarin-S reaction. 

Appreciable ionic conductivity is found in open framework or layered materials containing mobile cations (see Ionic Conductors). Several phosphates have been found to be good ionic conductors and are described above NASICON (Section 5.2.1), a-zirconium phosphates (Section 5.3.1), HUP (Section 5.3.3), and phosphate glasses (Section 5.4). Current interest in lithium ion-conducting electrolytes for battery apphcations has led to many lithium-containing phosphate glasses and crystalline solids such as NASICON type titanium phosphate being studied. ... 

Hasebe et al. [140] prepared an antitracking and weather resistant EPR by mixing into its matrix carbon and titanium phosphate. The metal salt gets ionized and then decomposes the hydroperoxide and peroxy radicals ... 

Recently, renewed attention has been given to so-called soft chemistry methods of synthesis of new metastable materials [9]. The synthesis of new microporous materials containing transition metals in the framework is of growing interest due to the expected catalytic redox properties [10]. The microporous titanium(IV) silicates [11] discovered have already proven the concept by showing very good catalytic activities and are widely used nowadays [12]. Similarly, hydrothermally synthesized titanium phosphates with open-finmework or layered structures are attracting attention as potential materials with similar properties [13]. 

A high affinity of polyvalent metal phosphates for divalent cations is not an unusual fact [1]. There are dozens of known exchangers with much higher capacities than that found for the 1. Nevertheless, this layered compound is an extremely interesting ion-exchanger. He shows a uniquely high affinity for the mercury(II) ion, while all other known titanium phosphate or titanium arsenate sorbents do not exhibit any preference for the Hg cation. 

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