Synthesis and Characterization of Two Novel Fibrous Titanium Phosphates Ti2O(PO4)2·2H2O
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- 作者：Anatoly I. Bortun ; Sergei A. Khainakov ; Lyudmila N. Bortun ; Damodara M. Poojary ; Julio Rodriguez ; Jose R. Garcia ; and Abraham Clearfield
- 刊名：Chemistry of Materials
- 出版年：1997
- 出版时间：August 1997
- 年：1997
- 卷：9
- 期：8
- 页码：1805 - 1811
- 全文大小：333K
- 年卷期：v.9,no.8(August 1997)
- ISSN：1520-5002
文摘
New crystalline phases of fibrous titanium(IV) oxophosphateswere prepared hydrothermally from titanium(IV) chloride in phosphoric acid solutions.The influence of several factors(concentration of reagents, molar ratio P:Ti in the reaction mixture,and reaction times)was studied. A phase diagram of the system is given. On thebasis of elemental and thermalanalysis, X-ray powder diffraction, 31P MAS NMR, and IRspectroscopy, the formula Ti2O(PO4)2·2H2O was assigned tothe novel compounds. The new phases (
-TiP and 
-TiP)havedifferent structures. The crystal structure of -TiP was solvedfrom X-ray powder data andwas shown to be of the framework type with tunnels parallel to thec-axis direction. Theabsence of n-alkylamine intercalation processes for bothcompounds and other physical andbehavioral similarities suggests a framework type structure for -TiPalso. The ion-exchangebehavior toward alkali and alkaline earth ions wasstudied.
-TiP and -TiP)havedifferent structures. The crystal structure of -TiP was solvedfrom X-ray powder data andwas shown to be of the framework type with tunnels parallel to thec-axis direction. Theabsence of n-alkylamine intercalation processes for bothcompounds and other physical andbehavioral similarities suggests a framework type structure for -TiPalso. The ion-exchangebehavior toward alkali and alkaline earth ions wasstudied.