Photocatalytic recovery of noble metals from waste solutions using a polyoxometallate (POM)-based hybrid photocatalyst

Tetsuya Kida, Hiromasa Matsufuji, Masayoshi Yuasa, Kengo Shimanoe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We attempted the photo-chemical recovery of noble metals from solutions using inorganic-organic hybrid photocatalysts based on polyoxometallates (POMs) such as PMo12O403-, SiW12O404-, and γ-SiW10O368- coupled with a cationic surfactant, dimethyldioctadecylammonium (DODA). We also used γ-SiW10O36-O(SiC18H37)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-SiW10O36/DODA photocatalyst exhibited the best activity and was able to recover gold from solution. It was suggested that one-electron reduced γ-SiW10O369-, 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.

Original languageEnglish
Title of host publicationMulti-Functional Materials and Structures IV
Pages518-521
Number of pages4
DOIs
Publication statusPublished - 2013
Event4th International Conference on Multi-Functional Materials and Structures, MFMS 2013 - Sathorn-Taksin, Bangkok, Thailand
Duration: Jul 14 2013Jul 17 2013

Publication series

NameAdvanced Materials Research
Volume747
ISSN (Print)1022-6680

Other

Other4th International Conference on Multi-Functional Materials and Structures, MFMS 2013
CountryThailand
CitySathorn-Taksin, Bangkok
Period7/14/137/17/13

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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