Ostroushko Alexander, Russkikh Olga, Zhulanova Tatiyana, Permyakova Anastasia, Filonova Elena
Institute of Natural Sciences and Mathematics, Ural Federal University, 620002 Yekaterinburg, Russia.
Institute of High Temperature Electrochemistry of the Ural Branch of the Russian Academy of Sciences, 620137 Yekaterinburg, Russia.
Materials (Basel). 2024 Dec 12;17(24):6066. doi: 10.3390/ma17246066.
The development and characterization of synthesis techniques for oxide materials based on ceria is a subject of extensive study with the objective of their wide-ranging applications in pursuit of sustainable development. The present study demonstrates the feasibility of controlled synthesis of CeMO (M = Fe, Ni, Co, Mn, Cu, Ag, Sm, Cs, x = 0.0-0.3) in combustion reactions from precursors comprising glycine, polyvinyl alcohol, polyvinylpyrrolidone, polyethylene glycol, and cellulose as organic components. Controlled synthesis is achieved by varying the composition of the precursor, the type of organic component, and the amount of organic component, which allows for the influence of the generation of high-density electrical charges and outgassing during synthesis. The intensity of charge generation is quantified by measuring the value of the precursor-ground potential difference. It has been demonstrated that an increase in the intensity of charge generation results in a more developed morphology, which is essential for the practical implementation of ceria as a catalyst to enhance contact with gases and solid particles. The maximum value of the potential difference, equal to 68 V, is obtained during the synthesis of CeNiO with polyvinyl alcohol in stoichiometric relations, which corresponds to a specific surface area of 21.7 m g. A correlation is established between the intensity of gas release for systems with different organic components, the intensity of charge generation, morphology, and the value of the specific surface area of the samples.
基于二氧化铈的氧化物材料合成技术的发展与特性研究是一个广泛的研究课题，其目标是在追求可持续发展的过程中实现其广泛应用。本研究证明了在燃烧反应中，以甘氨酸、聚乙烯醇、聚乙烯吡咯烷酮、聚乙二醇和纤维素作为有机成分的前驱体可控合成CeMO（M = Fe、Ni、Co、Mn、Cu、Ag、Sm、Cs，x = 0.0 - 0.3）的可行性。通过改变前驱体的组成、有机成分的类型和有机成分的量来实现可控合成，这使得在合成过程中能够影响高密度电荷的产生和除气。通过测量前驱体与地面的电位差值来量化电荷产生的强度。已经证明，电荷产生强度的增加会导致更发达的形态，这对于将二氧化铈实际用作催化剂以增强与气体和固体颗粒的接触至关重要。在以化学计量关系用聚乙烯醇合成CeNiO的过程中，获得了等于68 V的最大电位差值，这对应于21.7 m²/g的比表面积。建立了具有不同有机成分的体系的气体释放强度、电荷产生强度、形态与样品比表面积值之间的相关性。
