Preparation, structure and photocatalytic activity of nanocomposites based on cerium oxide

Q4 Chemistry
I. Matsukevich, E. D. Yundel, N. Kulinich, Y. Yahorava, L. Kulbitskaya, T. F. Kuznetsova
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引用次数: 0

Abstract

Mesoporous CeO2 and MgO powders and nanocomposites based on them were synthesized by the method of self-propagating high-temperature synthesis, and the mutual influence of magnesium oxide and cerium oxide on the crystal structure, microstructure, and morphology of the obtained materials was studied. It has been established that CeO2 is formed on the surface of magnesium oxide, while the developed surface of the material is preserved. It has been established, that the sizes of CeO2 crystallites in the composition of nanocomposites change insignificantly and range from 6.5 to 7.4 nm, while the values of the specific surface area and average pore diameter of the studied samples depend on the composition and vary in the ranges of 19–41 m2/g and 11.9‒19 nm, respectively. The highest efficiency of photodegradation of dyes of acid telon blue and direct bright blue is observed for samples of MgO–CeO2 (30 mol.%) and MgO–CeO2 (50 mol.%) ‒ 98.5 and 92.5 %, respectively, taking into account the effect of direct photolytic decomposition under the influence of ultraviolet radiation.
氧化铈纳米复合材料的制备、结构及光催化性能
采用自蔓延高温合成的方法合成了介孔CeO2和MgO粉末及其纳米复合材料,并研究了氧化镁和氧化铈对材料晶体结构、微观结构和形貌的相互影响。结果表明,CeO2在氧化镁表面形成,而材料的显影表面被保留。结果表明,纳米复合材料中CeO2晶体的尺寸变化不大,范围在6.5 ~ 7.4 nm之间,而样品的比表面积和平均孔径随复合材料的组成而变化,分别在19 ~ 41 m2/g和11.9 ~ 19 nm之间。考虑到在紫外辐射作用下的直接光解作用,MgO-CeO2 (30 mol.%)和MgO-CeO2 (50 mol.%)样品对酸性塔隆蓝和直接亮蓝染料的光降解效率最高,分别为98.5%和92.5%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
0.30
自引率
0.00%
发文量
38
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