Tethering metal ions to photocatalyst particulate surfaces by bifunctional molecular linkers for efficient hydrogen evolution
Isimjan, Tayirjan T.
Del Gobbo, Silvano
Anjum, Dalaver Hussain
Garcia Esparza, Angel T.
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
KAUST Solar Center (KSC)
KAUST Catalysis Center (KCC)
Chemical Science Program
Advanced Nanofabrication, Imaging and Characterization Core Lab
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AbstractA simple and versatile method for the preparation of photocatalyst particulates modified with effective cocatalysts is presented; the method involves the sequential soaking of photocatalyst particulates in solutions containing bifunctional organic linkers and metal ions. The modification of the particulate surfaces is a universal and reproducible method because the molecular linkers utilize strong covalent bonds, which in turn result in modified monolayer with a small but controlled quantity of metals. The photocatalysis results indicated that the CdS with likely photochemically reduced Pd and Ni, which were initially immobilized via ethanedithiol (EDT) as a linker, were highly efficient for photocatalytic hydrogen evolution from Na2S-Na2SO3-containing aqueous solutions. The method developed in this study opens a new synthesis route for the preparation of effective photocatalysts with various combinations of bifunctional linkers, metals, and photocatalyst particulate materials. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
SponsorsFunding for this work was partially provided by Saudi Aramco under contract 6600024505/01. Research reported in this publication was also supported by the King Abdullah University of Science and Technology (KAUST).
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