Issue 14, 1993

Effect of calcination on titanium phosphate produced by H3PO4 treatment of anatase

Abstract

The effect of calcination at different temperatures on anatase treated with H3PO4 has been studied by several techniques, in order to understand the mechanism of the formation of stable titanium phosphates. Calcination at 573 K of the hydrated phosphate, α-Ti(HPO4)2·H2O, obtained by reaction of anatase with H3PO4, leads to the formation of TiP2O7, although its crystallinity is perturbed by the presence of an excess of phosphoric acid in the starting material. Calcination at 873 K eliminates the excess of H3PO4, probably by formation of volatile P2O5, and a better crystallized TiP2O7 is obtained. A 31P magic-angle spinning nuclear magnetic resonance study of the pyrophosphate indicates that the nine lines observed in the spectrum are due to the presence of a 3 × 3 × 3 cubic superlattice.

Article information

Article type
Paper

J. Chem. Soc., Faraday Trans., 1993,89, 2515-2518

Effect of calcination on titanium phosphate produced by H3PO4 treatment of anatase

J. Soria, J. E. Iglesias and J. Sanz, J. Chem. Soc., Faraday Trans., 1993, 89, 2515 DOI: 10.1039/FT9938902515

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements