Abstract
The catalytically important, two-dimensional vanadyl hydrogen phosphate hemihydrate, VOHPO4⊙0.5H2O phase was transformed to the one-dimensional vanadyl hydrogen phosphate tetrahydrate, VOHPO4⊙4H2O for the first time by mild treatment with water vapor. It was also observed that for three samples of VOHPO4⊙0.5H2O prepared under different conditions, the rate of transformation to the tetrahydrate was markedly affected by morphology and crystallinity. The tetrahydrate phase could also be re-transformed to the hemihydrate by applying high vacuum or by heating at 120 °C, but this was accompanied by significant loss in crystallinity.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
A.K. Cheetham, G. Férey, and T. Loiseau: Open-framework inorganic materials. Angew. Chem. Int. Ed. 38, 3268 (1999).
C.N.R. Rao: Novel materials, materials design and synthetic strategies: Recent advances and new directions. J. Mater. Chem. 9, 1 (1999).
G. Cao, H.G. Hong, and T.E. Mallouk: Layered metal phosphates and phosphonates: From crystals to monolayers. Acc. Chem. Res. 25, 420 (1992).
C.N.R. Rao, S. Natarajan, A. Chaudhary, S. Neeraj, and A.A. Ayi: Aufbau principle of complex open-framework structures of metal phosphates with different dimensionalities. Acc. Chem. Res. 34, 80 (2001).
A. Muller, H. Reuter, and S. Dillinger: Supramolecular inorganic chemistry: Small guests in small and large hosts. Angew. Chem. Int. Ed. 34, 2328 (1995).
S. Feng and R. Xu: New materials in hydrothermal synthesis. Acc. Chem. Res. 34, 239 (2001).
T. Shimoda, T. Okuhara, and M. Misono: Preparation of vanadium-phosphorus mixed oxide (P/V=1) catalysts and their application to oxidation of butane to maleic anhydride. Bull. Chem. Soc. Jpn. 58, 2163 (1985).
G. Busca, F. Cavani, G. Centi, and F. Trifiro: Nature and mechanism of formation of vanadyl pyrophosphate: Active phase in n-butane selective oxidation. J. Catal. 99, 400 (1986).
C.J. Kiely, A. Burrows, S. Sajip, G.J. Hutchings, M.T. Sannanes, A. Tuel, and J.C. Volta: Characterization of variations in vanadium phosphate catalyst microstructure with preparation route. J. Catal. 162, 31 (1996).
A. Datta, A.R. Saple, and R.Y. Kelkar: An investigation of the variation of the morphology of the catalyst precursor (VO)2H4P2O9 with the medium of preparation. J. Mater. Sci. Lett. 11, 930 (1992).
V.V. Guliants, J.B. Benziger, S. Sundaresan, I.E. Wachs, J.M. Jehng, and J.E. Roberts: The effect of the phase composition of model VPO catalysts for partial oxidation of n-butane. Catal. Today 28, 275 (1996).
J.W. Johnson, D.C. Johnston, A.J. Jacobson, and J.F. Brody: Preparation and characterization of VO(HPO4)·0.5H2O and its topotactic transformation to (VO)2P2O2. J. Amer. Chem. Soc. 106, 8123 (1984).
M.E. Leonowicz, J.W. Johnson, J.F. Brody, H.F. Shannon, Jr., and J.M. Newsam: Vanadyl hydrogenphosphate hydrate: VO(HPO4)·4H2O and VO(HPO4)·0.5H2O. J. Solid State Chem. 56, 370 (1985).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Dasgupta, S., Agarwal, M. & Datta, A. Water-vapor-induced transformation of two-dimensional vanadyl hydrogen phosphate hemihydrate, VOHPO4⊙ 0.5H2O, to one-dimensional tetrahydrate, VOHPO4⊙ 4H2O. Journal of Materials Research 19, 3131–3134 (2004). https://doi.org/10.1557/JMR.2004.0407
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1557/JMR.2004.0407