期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 5, 期 18, 页码 8680-8689出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta00855d
关键词
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资金
- Program for Professor of Special Appointment in Shanghai (Eastern Scholar)
- National Natural Science Foundation of China [11472164, 51271105]
- Shanghai Science & Technology Committee [15520720600]
- Innovative Research Team [IRT13078]
Yolk-shell structures with a unique three-dimensional (3D) open architecture offer great advantages for constructing advanced photocatalysts. However, metal sulfides with yolk-shell nanostructures were rarely reported. In this work, unique yolk-shell CdS microcubes are synthesized from Cd-Fe Prussian blue analogues (Cd-Fe-PBA) through a facile microwave-assisted hydrothermal process. Their formation mechanism is also proposed based on the anion exchange and Kirkendall effect process. Benefitting from structural merits, including a 3D open structure, small size of primary nanoparticles, high specific surface area, and good structural robustness, the obtained yolk-shell CdS microcubes manifest excellent performances for photocatalytic hydrogen evolution from H2O under visible-light irradiation. The photocatalytic H-2 evolution rate is 3051.4 mmol h(-1) g(-1) (with an apparent quantum efficiency of 4.9% at 420 nm), which is similar to 2.43 times higher than that of conventional CdS nanoparticles. Furthermore, the yolk-shell CdS microcubes exhibit remarkable photocatalytic stability. This work demonstrates that MOF-derived yolk-shell structured materials hold great promise for application in the field of energy conversion.
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