<p>In this paper, the influence of the nature of zirconium dioxide (ZrO<sub>2</sub>) precursors and some additional physical factors, such as ultrasound and hydrothermal aging, on the formation of ZrO<sub>2</sub> with high proportions of high-temperature, high specific surface area, and high porosity, crucial for gas adsorption and catalytic applications, is studied. The methods of producing ZrO<sub>2</sub>, which use alkoxides and oxysalts of Zr as precursors, and involve sintering of ZrO<sub>2</sub> either with or without a structure-forming agent, such as cetyltrimethylammonium bromide (CTAB), are considered. A comparative investigation of the textural and structural properties of ZrO<sub>2</sub> samples prepared by different methods is performed using techniques such as thermal analysis, X-ray diffraction, low-temperature nitrogen adsorption, infrared spectroscopy, and scanning electron microscopy. The obtained results suggest that the methods of producing ZrO<sub>2</sub>, including ultrasonic treatment of pre-precipitated zirconium hydroxide suspensions followed by hydrothermal aging and template hydrothermal synthesis with CTAB and zirconium alkoxides, are promising. The samples used for the study had a crystallite size ranging from 5 to 13 nm, a specific surface area between 50 and 150 m²/g, a pore volume between 0.16 and 0.25 cm<sup>3</sup>/g, and a narrow pore size distribution.</p> Graphical Abstract <p></p>

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Textural and structural properties of zirconium dioxide depending on synthesis methods and precursor type

  • M. A. Savastyanova,
  • N. B. Kondrashova,
  • K. O. Ukhin,
  • V. A. Valtsifer,
  • V. N. Strelnikov

摘要

In this paper, the influence of the nature of zirconium dioxide (ZrO2) precursors and some additional physical factors, such as ultrasound and hydrothermal aging, on the formation of ZrO2 with high proportions of high-temperature, high specific surface area, and high porosity, crucial for gas adsorption and catalytic applications, is studied. The methods of producing ZrO2, which use alkoxides and oxysalts of Zr as precursors, and involve sintering of ZrO2 either with or without a structure-forming agent, such as cetyltrimethylammonium bromide (CTAB), are considered. A comparative investigation of the textural and structural properties of ZrO2 samples prepared by different methods is performed using techniques such as thermal analysis, X-ray diffraction, low-temperature nitrogen adsorption, infrared spectroscopy, and scanning electron microscopy. The obtained results suggest that the methods of producing ZrO2, including ultrasonic treatment of pre-precipitated zirconium hydroxide suspensions followed by hydrothermal aging and template hydrothermal synthesis with CTAB and zirconium alkoxides, are promising. The samples used for the study had a crystallite size ranging from 5 to 13 nm, a specific surface area between 50 and 150 m²/g, a pore volume between 0.16 and 0.25 cm3/g, and a narrow pore size distribution.

Graphical Abstract