Abstract
Powders and films of (NH4)2 – x H x V12 – y Mo y O31 ± δ· nH2O (0 ≤ x≤ 2, 0 ≤ y≤ 3) xerogels with a layered structure were prepared for the first time. According to IR spectroscopy data, the V–O–Mo layers in the xerogels are similar to those in the delta vanadium bronze (NH4)0.5V2O5 . X-ray photoelectron spectroscopy shows that the vanadium and molybdenum in the xerogels are mainly in the oxidation states 5+ and 6+, respectively. The materials also contain small amounts of V4+and OH–. The thermal stability of the materials increases with Mo content. The electrical conductivity of the films depends on air humidity and reaches a maximum at the composition (NH4)1.5H0.5V9Mo3O31 + δ· nH2O. At temperatures in the range 20–70°C and air humidity between 12 and 59%, the activation energy of conduction is very low.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
REFERENCES
Volkov, V.L., Fazy vnedreniya na osnove oksidov vanadiya (Intercalation Phases Based on Vanadium Oxides), Sverdlovsk: Ural. Nauchnyi Tsentr Akad. Nauk SSSR, 1987, pp. 132–154.
Livage, J., Vanadium Pentoxide Gels, Chem. Mater., 1991, vol. 3, no. 4, pp. 578–593.
Aldebert, P., Haesslin, H.W., Baffier, N., and Livage, J., Vanadium Pentoxide Gels: III. X-ray and Neutron Diffraction Study of Highly Concentrated Systems; One-Dimensional Swelling, J. Colloid. Interface Sci., 1984, vol. 98, no. 2, pp. 478–483.
Aldebert, P., Baffier, N., Legendre, J.-J., and Livage, J., V2O5 Gels: A Versatile Host Structure for Intercalation, Rev. Chim. Miner., 1982, vol. 19, no. 4/5, pp. 485–495.
Bondarenko, V., Volkov, V., and Pleshanovis, A., Hydrated Vanadium Compounds, Fiz. Tverd. Tela (S.-Peterburg), 1993, vol. 35, no. 12, pp. 3189–3197.
Bondarenka, V., Grebinskij, S., Mickevicius, S., et al., Physical Properties of the Poly-Vanadium-Molybdenum Acid Xerogels, J. Non-Cryst. Solids, 1998, vol. 226, no. 1, pp. 1–10.
Guseinov, R.M. and Prisyazhnyi, V.D., Protonic Solid Electrolytes, Ukr. Khim. Zh. (Russ. Ed.), 1992, vol. 58, no. 10, pp. 823–833.
Yaroslavtsev, A.B., Protonic Conduction in Inorganic Hydrates, Usp. Khim., 1994, vol. 63, no. 5, pp. 449–455.
Denisova, T.A., Zakharova, G.S., Volkov, V.L., and Pletnev, R.N., State of Water and Structure of Polyvanadomolybdic Acid, Koord. Khim., 1989, vol. 15, no. 2, pp. 221–224.
Palanisamy, T., Gopalakrishnan, J., and Sastri, M.V.C., Preparation and Studies of a New Ammonium Vanadium Bronze, (NH4)xV2O5, J. Solid State Chem., 1974, vol. 9, no. 3, pp. 273–278.
Theobald, F. and Vidonne, A., Essai sur la structure de NH4V4O10, Bull. Soc. Chim. Fr., 1974, vol. 18, no. 11, pp. 2431–2433.
Kanke, Y., Kato, K., Takayama-Muromachi, E., et al., Structure of K0.5V2O5, Acta Crystallogr., Sect C: Cryst. Struct. Commun., 1990, vol. 46, no. 9, pp. 1590–1592.
Kuznetsov, M.V., Volkov, V.L., Zhakharova, G.S., and Gubanov, V.A., XPS Study of Catalytic Compounds H2V12-x MexO31 + δ nH2O (Me: Mo, Cr), J. Electron. Spectrosc. Relat. Phenom., 1994, vol. 68, pp. 579–588.
Volkov, V.L., Tynkacheva, T.Sh., Fotiev, A.A., and Tkachenko, E.V., System V2O5-MoO3, Zh. Neorg. Khim., 1972, vol. 17, no. 10, pp. 2803–2805.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Volkov, V.L., Zakharova, G.S., Kristallov, L.V. et al. Synthesis, Structure, and Properties of Ammonium Polyvanadomolybdate Xerogels. Inorganic Materials 37, 408–412 (2001). https://doi.org/10.1023/A:1017544231359
Issue Date:
DOI: https://doi.org/10.1023/A:1017544231359