Photocatalytic Recovery of Noble Metals from Waste Solutions Using a Polyoxometallate (POM)-Based Hybrid Photocatalyst

Tetsuya Kida; Hiromasa Matsufuji; Masayoshi Yuasa; Kengo Shimanoe

doi:10.4028/www.scientific.net/AMR.747.518

Paper Titles

Anti-Bacterial Efficacies and Discolorations of Polypropylene Doped with HPQM Based Water Solution and Neusilin
p.501

Synthesis and Characterization of Supramolecular Elastomers from Polyacids Composed of Vegetable Oils
p.505

Functional Modification of Bamboo Rayon (Cellulose) Fabric to Render it Antibacterial and UV Protective
p.509

Synthesis of High Quality Graphene Films by Atmospheric Pressure CVD and their Application in Laser Q-Switching
p.514

Photocatalytic Recovery of Noble Metals from Waste Solutions Using a Polyoxometallate (POM)-Based Hybrid Photocatalyst
p.518

Silica-Reinforced Natural Rubber with Epoxidized Low Molecular Weight Rubber as a Compatibilizer
p.522

Investigation of ZnO Buffer for the Optical and Electrical Characteristics of Polymer/Carbon Nanotube Composite Sol Deposited on Flexible Substrates
p.526

Comparison of Coupling Effectiveness among Amino-, Chloro-, and Mercapto Silanes in Chloroprene Rubber
p.530

Intermetallic Electrode Structure Produced by Thermal Spraying of Water-Atomized Cu-Sn Powders
p.534

HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 747Photocatalytic Recovery of Noble Metals from Waste...

Photocatalytic Recovery of Noble Metals from Waste Solutions Using a Polyoxometallate (POM)-Based Hybrid Photocatalyst

Abstract:

We attempted the photo-chemical recovery of noble metals from solutions using inorganic-organic hybrid photocatalysts based on polyoxometallates (POMs) such as PMo₁₂O₄₀^3-, SiW₁₂O₄₀^4-, and γ-SiW₁₀O₃₆^8- coupled with a cationic surfactant, dimethyldioctadecylammonium (DODA). We also used γ-SiW₁₀O₃₆-O(SiC₁₈H₃₇)₂as 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-SiW₁₀O₃₆^9-, 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.