The Preparation of Organo Colloidal Precious Metal Particles

Autor:	Kenjiro Meguro, Kunio Esumi, Makoto Torizuka
Rok vydání:	1988
Předmět:	chemistry.chemical_classification Chloroform Aqueous solution Base (chemistry) Inorganic chemistry chemistry.chemical_element General Chemistry chemistry.chemical_compound chemistry Sodium hydroxide Hexachloroplatinate Platinum Trioctylphosphine oxide Triethylamine
Zdroj:	Bulletin of the Chemical Society of Japan. 61:341-345
ISSN:	1348-0634 0009-2673
DOI:	10.1246/bcsj.61.341
Popis:	Platinum particles were prepared by reducing the hydrogen hexachloroplatinate extracted in organic solvents from an aqueous solution by these extractants:dioctadecyldimethylammonium chloride(DDAC), trioctylmethylammonium chloride(TMAC), and trioctylphosphine oxide(TOPO). The extraction ratio of platinum(IV) increased in chloroform, isobutyl methyl ketone, and cyclohexane with an increase in the concentrations of the extractants, and then approached a constant state. The extracts were reduced by formaldehyde or benzaldehyde in the presence of water and a base (sodium hydroxide or triethylamine) for several hours at 65 °C. The platinum particles obtained in chloroform and isobutyl methyl ketone were very stable; their diameters were 15–25 A.
Databáze:	OpenAIRE
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