Synthesis of Framework Complex Zirconium Phosphates via Mechanochemical Activation of Mixed Solid Salts
VLADISLAV A. SADYKOV1,3, SVETLANA N. PAVLOVA1, MARINA V. CHAIKINA2, GALINA V. ZABOLOTNAYA1, RAISA I. MAXIMOVSKAYA1, SERGEY V. TSYBULYA1, ELENA B. BURGINA1, VLADIMIR I. ZA
1G. K. Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences,
Pr. Lavrentyeva 5, Novosibirsk 630090 (Russia),
E-mail : sadykov@catalysis.nsk.su
2Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch
of the Russian Academy of Sciences, Ul. Kutateladze 18, Novosibirsk 630128 (Russia)
3Novosibirsk State University,Ul. Pirogova 1, Novosibirsk 630090 (Russia)
4M. V. Lomonosov Moscow State University,Vorobyovy gory, Moscow (Russia)
5102 Materials Research Lab., Penn State University,
University Park 16802-4801, PA (USA)
Pages: 179-186
Abstract
Results of systematic studies of framework zirconium phosphates synthesis via mechanical activation (MA) of the mixture of solid salts followed by the hydrothermal treatment (HTT) in the presence of surfactants, drying and calcination in air are considered. Application of modern physical methods sensitive to the state of bulk and surface of nano-systems (XPD, SAXS, TEM, EXAFS, FTIRS, SIMS, UV-vis) allowed to elucidate genesis of those complex systems containing different stabilizing/modifying cations and anions. The local structure of zirconium phosphate nuclei formed in the course of MA and spatial distribution of guest cations within those nanoparticles strongly depend on the composition of starting solid reagents, which determines a mode of the acid-base interaction in the activated mixture. These properties determine in turn realization of different mechanisms of complex framework phosphates crystallization under HTT - either via oriented stacking of primary particles (occurs even in neutral or alkaline solutions) or by dissolution-precipitation route in acid solutions. Factors determining the structural type, thermal stability, surface composition and solubility of crystalline complex zirconium phosphates prepared via MA route were elucidated and analyzed as dependent upon the composition and genesis of those systems.
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