Immobilizing CdS quantum dots and dendritic Pt nanocrystals on thiolated graphene nanosheets toward highly efficient photocatalytic H2 evolution

Light 02 engineering and technology Sulfides Catalysis Nanostructures Quantum Dots Cadmium Compounds Nanoparticles Graphite Sulfhydryl Compounds 0210 nano-technology Hydrogen Platinum
DOI: 10.1039/c3nr03043a Publication Date: 2013-08-01T14:06:18Z
ABSTRACT
We report the development of a highly efficient photocatalytic system by immobilizing high-quality CdS quantum dots and dendritic Pt nanocrystals on thiol-functionalized graphene substrates. have demonstrated that use QDs with compact sizes leads to dramatically enhanced performance in comparison their bulk counterparts. Our design allows for systematic examination impact QD loading, morphology, surface coating nanocrystal cocatalyst H2 evolution activity. It was found CdS–Pt binary has high efficiency 1.37 mmol h−1 visible light driven evolution, there 30% improvement introducing thiolated reduced oxide form three-component CdS–Pt–Gcys nanocomposites. The highest rate 2.15 (λ ≥ 420 nm) QE 50.7% achieved further photo-annealing nanocomposites prior reaction.
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