Mutual separation of platinum group metals via seed-mediated growth on a polymer with metal-coordination unit

Autor:	Yui Nonaka, Rina Takahashi, Takumi Akiyama, Takeshi Yamanobe, Daisuke Nagai
Rok vydání:	2021
Předmět:	chemistry.chemical_classification Inorganic chemistry Nucleation Filtration and Separation Polymer Platinum group Analytical Chemistry Ion Metal Sodium borohydride chemistry.chemical_compound Adsorption chemistry visual_art visual_art.visual_art_medium Seed mediated
Zdroj:	Separation and Purification Technology. 276:119265
ISSN:	1383-5866
Popis:	Platinum group metals (PGMs) are extremely difficult to separate from each other because of the similarity in their chemical and physical properties. We report here the effective mutual separation of PGMs utilizing a seed-mediated growth approach on a polymer with a metal-coordination unit (PMCU). Nucleation of Pt4+ ions by sodium borohydride produced Pt0 seeds on the metal-coordination unit (thiocarbonyl group) of PMCU. The Pt seeds-attached polymer was added into a solution containing Pt4+ and other PGM ions, and reduction with L-ascorbic acid selectively assembled Pt atoms around the Pt seeds. The resulting polymer was removed from the mixture and washed to remove Pt and other PGMs that were only physically adsorbed, achieving selective separation of Pt. By changing the nucleation site from Pt to Pd, the immersion of Pd seeds-attached polymer in the mixed solution containing Pd2+ and other PGM ions and reduction with L-ascorbic acid selectively separated Pd. Therefore, this approach is applicable to selective separation of various target PGMs by the selection of nucleation sites on PMCU.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b16aefd37e5beab460a9365fa4c708a9 https://doi.org/10.1016/j.seppur.2021.119265 Zobrazit plný text záznamu Full Text from ScienceDirect