Shell Thickness Engineering Significantly Boosts the Photocatalytic H2 Evolution Efficiency of CdS/CdSe Core/Shell Quantum Dots

• DOI: 10.1021/acsami.7b07211
• Publication Date: 2017-09-27T10:12:50Z
• Authors: Ping Wang; Minmin Wang; Jie Zhang; Chuanping Li; Xiaolong Xu; Yongdong Jin
• Keywords: Quantum yield

Colloidal semiconductor quantum dots (QDs) have recently emerged as a good candidate for photocatalytic hydrogen (H2) evolution in water. A further understanding of the factors that can affect and boost catalytic activity QD-based H2-generating system is great importance future design such systems practical use. Here, we report on fine shell thickness engineering colloidal CdS/CdSe core/shell QDs its effect H2 production Our results show that, with proper thickness, photogeneration yield (ΦH2) could reach 30.9% under illumination 420 nm light, which 49% larger than CdS core. Furthermore, underlying mechanism has also been tentatively proposed discussed.