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A Plasmonic Colloidal Photocatalyst Composed of a Metal–Organic Framework Core and a Gold/Anatase Shell for Visible‐Light‐Driven Wastewater Purification from Antibiotics and Hydrogen Evolution
Author(s) -
Tilgner Dominic,
Kempe Rhett
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201605473
Subject(s) - photocatalysis , anatase , materials science , chemical engineering , visible spectrum , metal organic framework , nanotechnology , catalysis , chemistry , adsorption , organic chemistry , optoelectronics , engineering
Porous coordination polymers (PCP) or metal– organic frameworks (MOF) are promising materials for the generation of photocatalytically active composite materials. Here, a novel synthesis concept is reported, which permits the formation of PCP/MOF‐core–Au/anatase‐shell materials. These materials are photocatalysts for wastewater purification and hydrogen generation from water under visible‐light illumination. MIL‐101 (Cr) is utilized as the core material, which directs the size of the core–shell compound and ensures the overall stability. In addition, its excellent reversible large molecule sorption behavior allows the materials synthesis. The crystalline anatase shell is generated stepwise under mild conditions using titanium(IV) isopropoxide as a precursor. The high degree of control of the vapor phase deposition process permits the precise anatase shell formation. The generation of plasmonic active gold particles on the TiO 2 shell leads to an efficient material for visible‐light‐driven photocatalysis with a higher activity than gold‐decorated P25 (Degussa).