Effect of the surface charge on the complexing and catalytic properties of Cu2+-containing composite materials based on zirconia and powdered cellulose

• Published in: Russian journal of physical chemistry. B Vol. 8; no. 3; pp. 317 - 325
• Main Authors: Kovaleva, E. G., Molochnikov, L. S., Parshina, E. V., Shishmakov, A. B., Mikushina, Yu. V., Kirilyuk, I. A., Grigor’ev, I. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.05.2014
• Subjects: Chemistry; Chemistry and Materials Science; Kinetics and Mechanism of Chemical Reactions. Catalysis; Physical Chemistry; zirconia; trimethylhydroquinone; pH-sensitive nitroxide radicals; EPR spectroscopy; composite materials; powdered cellulose
• ISSN: 1990-7931; 1990-7923
• DOI: 10.1134/S199079311403021X

Composite materials (CMs) based on zirconia xerogels and powdered cellulose (PC) were synthesized. The effect of the CM surface charge on their complexing properties with respect to Cu 2+ ions and on the catalytic activity of the samples in model reactions of the decomposition of H 2 O 2 and the oxidative dehydrogenation of trimethylhydroquinone with atmospheric oxygen was analyzed. It was experimentally proved that the use of PC for the synthesis of ZrO 2 -based CMs, as in the case of previously studied CMs based on SiO 2 and TiO 2 , leads to an increase in the specific surface area S sp and a decrease in the negative electric potential of their surface. The surface charge, sorption method, and the composition of the buffer solution used for sorption have a significant effect on the copper(II) content in the CM phase, the distribution pattern, and the composition of the sorbed copper(II) compounds and on the catalytic activity of the synthesized Cu 2+ -containing CMs.