State of phosphorus in sorbents based on titanium and zirconium phosphates from 31P NMR spectroscopy data
- 48 Downloads
A 31P NMR method has been used to study sorbents based on titanium and zirconium phosphates synthesized by bulk mixing the reagents and treatment of x-ray amorphous TiO2, rutile and ZrO2 by phosphoric acid. In the bulk titanium and zirconium phosphates the phosphorus occurs in four different states, phosphate groups bonded through cross-linking oxygen atoms with one, two, and three atoms of the metal and molecules of phosphoric acid trapped in the matrix of the sorbent in the synthesis process. It is established that the method of grafting the phosphate groups to the surfaces of the hydrated TiO2 and ZrO2 is determined by the crystalline and chemical properties of the surfaces.
KeywordsTiO2 Titanium Phosphorus Oxygen Atom Rutile
Unable to display preview. Download preview PDF.
- 1.Ch. Amflett, Inorganic Ion Exchangers [Russian translation], Mir, Moscow (1966).Google Scholar
- 2.V. Vesely and V. Pekarek, “Synthetic inorganic ion exchangers. 1. Hydrous oxides and acidic salts of multivalent metals,” Talanta, 19, No. 3, 219–262 (1972).Google Scholar
- 3.V. D. Komarov and V. F. Tikavyi, “Physicochemical properties of zirconium phosphates,” Izv. Vuzov. Khim. Khim. Tekhnol., 14, No. 5, 651–655 (1971).Google Scholar
- 4.E. S. Materova and P. A. Skabichevskii, “Ion exchange properties of zirconyl phosphates,” 1. Investigation of ion exchange properties of zirconyl phosphate as function of production conditions,” Vestn. Leningr. un-ta, No. 10, 65–73 (1964).Google Scholar
- 5.V. Vesely and V. Pekarek, A study of sorption on zirconyl phosphate and changes of its properties at higher temperatures,” J. Inorg. Nucl. Chem., 25, No. 6, 697–709 (1963).Google Scholar
- 6.T. A. Karaseva, V. V. Strelko, and V. N. Belyakov, “Specific forming of sorbents of the zirconium phosphate type by ions of alkaline metals,” Teor. Éksp. Khim., 14, No. 1, 132–135 (1978).Google Scholar
- 7.V. V. Strelko and T. A. Karaseva, “The causes of specific sorption of ions on inorganic ion exchangers of the zirconium phosphate type,” Adsorbts. Adsorb., No. 5, 71–77 (1977).Google Scholar
- 8.R. Caletka and M. Tympl, “Uptake of inorganic acid on hydrogens of tetravalent hydroxides and its application for the preparation of some inorganic sorbents,” J. Radioanal. Chem., 30, No. 1, 155–172 (1976).Google Scholar
- 9.V. V. Strelko, S. A. Khainakov, and V. N. Belyakov, “The mechanism of sorption of ions of the d-metals on hydrated titanium dioxide,” Ukr. Khim. Zh., 51, No. 6, 595–599 (1985).Google Scholar
- 10.I. L. Mudrakovskii, V. P. Shmachkova, N. S. Kotsarenko, and V. M. Mastikhin,” 31P NMR study of I–IV group polycrystalline phosphates,” J. Phys. Chem. Solids, 47, No. 4, 335–339 (1986).Google Scholar
- 11.J. Emsley, J. Feeney, and L. H. Sutcliffe, High Resolution Nuclear Magnetic Resonance Spectroscopy [Russian translation], Vol. 2, Mir, Moscow (1968).Google Scholar