Abstract
The conditions and the patterns of copper and nickel nanoparticles formation by direct reduction from aqueous solutions of their salts in nitrogen atmosphere were studied, and nanocomposite materials based on magnesium oxide and metal nanoparticles coated with protective oxide shell were obtained. The obtained materials are of interest as sorbents for the purification of aqueous media from toxic impurities, as well as catalysts in organic synthesis, in particular for the production of methanol from carbon dioxide. Phase composition, thermal stability, microstructure of nanocomposites, as well as their sorption properties, were studied. The powders of magnesium oxide and nanocomposites based on it were found to have high sorption capacities with respect to lead and chromium ions – up to 2989.0 and 499.9 mg/g, respectively.
Highlights
The conditions and the patterns of copper and nickel nanoparticles formation by direct reduction from aqueous solutions of their salts in nitrogen atmosphere were studied, and nanocomposite materials based on magnesium oxide and metal nanoparticles coated with protective oxide shell were obtained
Ni supported on CaO-MgO-Al2O3 as a highly selective and stable catalyst for H2 production via the glycerol steam reforming reaction / N
Information about of authorsNikolay P. Krutko – D. Sc. (Chemistry), Head of the Department. Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus (9/1, Surganov Str., 220072, Minsk, Republic of Belarus). E-mail: krutko@ igic.bas-net.by Ludmila V. Ovseenko – Ph. D. (Chemistry), Deputy Director. Institute of General and Inorganic Chemistry, National Academy of Sciences of Belarus (9/1, Surganov Str., 220072, Minsk, Republic of Belarus). E-mail: ovseenko@ igic.bas-net.by
Summary
Найдены условия и изучены закономерности формирования наночастиц меди и никеля методом прямого восстановления из водных растворов в атмосфере азота и получены нанокомпозиционные материалы на основе оксида магния и наночастиц меди, которые покрыты защитной оксидной оболочкой. Полученные материалы представляют интерес как сорбенты для очистки водных сред от токсических примесей, а также как катализаторы в органическом синтезе, в частности, для получения метанола из углекислого газа. Термическая стабильность, микроструктура нанокомпозитов, а также их сорбционные свойства. Установлены высокие значения сорбционной емкости порошков оксида магния и нанокомпозитов на его основе по отношению к ионам свинца и хрома ‒ до 2989,0 и 499,9 мг/г соответственно. Ключевые слова: наночастицы металлов, оксид магния, композиты, микроструктура, адсорбционные свойства, сорбционная емкость. Для цитирования: Нанокомпозиционные материалы на основе оксида магния и металлических наночастиц / И.
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