In:
Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 747 ( 2013-8), p. 518-521
Abstract:
We attempted the photo-chemical recovery of noble metals from solutions using inorganic-organic hybrid photocatalysts based on polyoxometallates (POMs) such as PMo 12 O 40 3- , SiW 12 O 40 4- , and γ-SiW 10 O 36 8- coupled with a cationic surfactant, dimethyldioctadecylammonium (DODA). We also used γ-SiW 10 O 36 -O(SiC 18 H 37 ) 2 as a photocatalyst. The four different photocatalysts dissolved in chloroform successfully photoreduced gold ions dissolved in water in a two-phase (chloroform/water) system under UV irradiation (λ 〈 475 nm). The γ-SiW 10 O 36 /DODA photocatalyst exhibited the best activity and was able to recover gold from solution. It was suggested that one-electron reduced γ-SiW 10 O 36 9- , which was formed by UV irradiation, reduced gold ions to produce large two-dimensional particles. The formation of sheet-like particles indicates that the reduction of gold ions occurred at the interface between chloroform and water.
Type of Medium:
Online Resource
ISSN:
1662-8985
DOI:
10.4028/www.scientific.net/AMR.747
DOI:
10.4028/www.scientific.net/AMR.747.518
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2013
detail.hit.zdb_id:
2265002-7
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