Тип публикации: статья из журнала
Год издания: 2020
Идентификатор DOI: 10.1016/j.matchemphys.2020.123600
Ключевые слова: copper sulfide nanoparticles, polysulfide, x-ray photoelectron spectroscopy, x-ray absorption spectroscopy, dft plus u
Аннотация: Colloidal copper sulfides produced in reactions of aqueous copper and sulfide ions are important for many materials applications, environment and mineral processing. Here, CuxS nanoparticles formed and aged at varying copper sulfate to sodium sulfide ratios were studied using in situ UV-vis-NIR spectroscopy, dynamic light scatterinПоказать полностьюg, X-ray absorption spectroscopy, ex situ TEM, X-ray photoelectron spectroscopy and Raman scattering, and DFT + U calculations. It was established that the ratio of aqueous Cu2+ to S2- ions of 1:2 is critical for the reaction, which yields disordered covellite-like 4-6 nm Cu0.7S nanoparticles comprised polysulfide species at this and higher sulfide concentrations; upon aging, the particles release sulfur and transform to chalcocite-like structure (Cu2-xS, x
Журнал: MATERIALS CHEMISTRY AND PHYSICS
Выпуск журнала: Vol. 255
Номера страниц: 123600
ISSN журнала: 02540584
Место издания: LAUSANNE
Издатель: ELSEVIER SCIENCE SA