Abstract
A method for the preparation of a SiO2–TiO2/Cr2O3(840) porous composite material in a block form with walls made of a silicate matrix and the interconnected channels of the matrix containing TiO2/Cr2O3(840) spherical hollow oxide composites was proposed. The specific surface area (Ssp) of the block composites was 212.2 m2/g, which is 20 times greater than the value of Ssp for spherical composites not fixed in the silicon(IV) oxide matrix. The composition of the TiO2/Cr2O3(840) and SiO2–TiO2/Cr2O3(840) samples was studied by X-ray diffractometry and X-ray microanalysis, which indicated the presence of chromium(III) oxide, titanium(IV) oxide, and an amorphous silicon(IV) oxide phase in the latter. The SiO2–TiO2/Cr2O3(840) block composite material exhibited catalytic activity in the deep oxidation reaction of para-xylene: a 100% conversion of the organic substance was achieved at a temperature of 350°C.
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ACKNOWLEDGMENTS
We are grateful to the scientific group of Prof. V.I. Syryamkin from the National Research Tomsk State University for obtaining the results by 3D microtomography.
Funding
This work was performed within the framework of state contract no. 10.2281.2017/PCh.
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Translated by V. Makhlyarchuk
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Rogacheva, A.O., Buzaev, A.A., Brichkov, A.S. et al. Catalytically Active Composite Material Based on TiO2/Cr2O3 Hollow Spherical Particles. Kinet Catal 60, 484–489 (2019). https://doi.org/10.1134/S002315841904013X
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DOI: https://doi.org/10.1134/S002315841904013X