Morphological behavior of spherically granulated hydrated zirconium dioxide during its chemical and hydrothermal treatments

作者：Chepurna Iryna^*; Kanibolotsky Valentyn; Strelko Volodymyr

来源：Journal of Sol-Gel Science and Technology, 2013, 68(3): 500-508.

DOI：10.1007/s10971-013-3119-1

• Spherically granulated zirconia
• Sol-gel synthesis
• Mesoporosity
• Fractal dimension
• Nitrogen adsorption

Hydrated zirconium dioxide samples were synthesized via original sol-gel route by two-step neutralization of zirconium oxychloride. Spherical granules of zirconia materials were prepared using a well-known "oil-drop" method. By the use of low temperature nitrogen adsorption, it is shown that surface fractal dimension of synthesized xerogels strongly depends on synthesis conditions, chemical and hydrothermal treatments. It is established that the change of synthesis conditions allows to obtain zirconium containing materials with developed porous structure: BET surface area-250-450 m(2)/g, pore diameter-2.0-4.2 nm, surface fractal dimension-2.28-2.63. It is shown that surface fractal dimension is an important parameter allowing to control the final properties of synthesized material and to determine the reasons of non-reproducibility of adsorptive, catalytic and other physical and chemical properties of zirconium containing oxides from synthesis to synthesis.

• 出版日期2013-12