Тип публикации: статья из журнала
Год издания: 2021
Идентификатор DOI: 10.1134/S003602362110003X
Ключевые слова: nanopowders, nickel, electron microscopy, hydrothermal synthesis
Аннотация: The reduction of divalent nickel with hydrazine hydrate from alkaline ammonia solutions at elevated temperatures was studied. A procedure to synthesize finely divided nickel powders was proposed. The morphology of the objects obtained under various synthesis conditions was investigated by scanning electron microscopy; it was shown Показать полностьюthat both needle-like and spherical particles can form. The specific surface area of the synthesized metallic nickel powders was determined by low-temperature nitrogen adsorption to be within the range 5-20 m(2)/g, depending on the synthesis conditions (the concentration of the initial salt in the solution, the pH, and the temperature). X-ray powder diffraction analysis showed that all the powders are mixtures of two phases: nickel (to 99%) and nickel hydroxide. X-ray photoelectron spectroscopy demonstrated that a particle of the powders consists of a nickel(0) core coated with several atomic layers of nickel hydroxide.
Журнал: RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
Выпуск журнала: Vol. 66, Is. 10
Номера страниц: 1463-1468
ISSN журнала: 00360236
Место издания: NEW YORK
Издатель: MAIK NAUKA/INTERPERIODICA/SPRINGER