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

• DOI: 10.1039/c3nr03043a
• Publication Date: 2013-08-01T14:06:18Z
• Authors: Zheng Fang; Yabo Wang; Jibin Song; Yimin Sun; Jiajing Zhou; Rong Xu; Hongwei Duan
• Keywords: Light; 02 engineering and technology; Sulfides; Catalysis; Nanostructures; Quantum Dots; Cadmium Compounds; Nanoparticles; Graphite; Sulfhydryl Compounds; 0210 nano-technology; Hydrogen; Platinum

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.