Тип публикации: статья из журнала
Год издания: 2024
Идентификатор DOI: 10.1134/s0036023623603057
Аннотация: Copper(II) oxide nanoparticles are promising materials for use in catalysis, biomedicine, and photovoltaics. They can also be used to prepare nanocomposites and hybrid nanoparticles. This paper presents a new one-pot method for preparing CuO nanoparticles without long-term washing and heat treatment. The proposed anion-exchange precipitation is a facile and fast process, and is easily reproducible under standard laboratory conditions. Anion-exchange precipitation of copper from copper chloride or copper sulfate solutions in the presence of the polysaccharide dextran-40 produces well-crystallized hydroxychloride Cu2Cl(OH)3 and hydroxysulfate Cu4(SO4)(OH)6, respectively; from copper nitrate solutions, a poorly crystallized Cu(OH)2 phase is formed. In the absence of polysaccharides, the product is copper oxide nanoparticles regardless of the anion in the precursor salt. The thus-prepared materials were used to prepare hydrosols. The hydrosols had high aggregation and sedimentation stability over a wide pH range (from 5 to 11) as shown by dynamic and electrophoretic light scattering. They were stable for more than three months at a concentration of 2 g/L (the average hydrodynamic diameter of the particles was 245 nm; the average ζ-potential was –31.1 mV). The optical and electronic properties of the prepared hydrosols imply that they could be of interest for use in photocatalysis and in optoelectronic devices.
Журнал: Russian Journal of Inorganic Chemistry
Выпуск журнала: Т. 69, № 2
Номера страниц: 265-276
ISSN журнала: 00360236
Место издания: Moscow
Издатель: Pleiades Publishing, Ltd.