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
AUTHORS (7)
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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