Journal
JOURNAL OF MATERIALS SCIENCE
Volume 52, Issue 19, Pages 11124-11134Publisher
SPRINGER
DOI: 10.1007/s10853-017-1130-6
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Funding
- China Scholarship Council (CSC)
- Program for Changjiang Scholars and Innovative Research Team in University [IRT_15R52]
- National Key Research Program of China [2016YFA0202602]
- National Natural Science Foundation of China [51302204]
- International Science AMP
- Technology Cooperation Program of China [2015DFE52870]
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Solar-driven hydrogen (H-2) generation utilizing photocatalysts has received extensive attention because of its potential to mitigate the global energy crisis and environmental problem. The implementation of efficient H-2 production strongly relies on stable, active, and low-cost photocatalysts. In this work, we report the designed synthesis of macroporous ZnO/ZnS/CdS composite spheres as a highly active photocatalyst for H-2 production via solar-driven water splitting. The composite spheres were synthesized by a facile solvothermal reaction paired with controllable ion-exchange processes. The resulting material exhibits superior photocatalytic activity, delivering a high H-2 production rate of similar to 11.37 mmol h(-1) g(-1) under light illumination (250-780 nm, with an ultraviolet light intensity of 34 mW cm(-2) and visible light intensity of 158 mW cm(-2)). Such performance enhancement can be mainly ascribed to the synergic effects of the composite structure: (1) formation of coherent ZnO/CdS and ZnS/CdS heterojunctions at nanoscale, facilitating charge separation of photoinduced electron/hole pairs, (2) highly accessible inner surface of the meso/macroporous ZnO/ZnS/CdS composites for rapid mass transfer of electrolyte, and (3) enhanced visible light scattering capability induced by their large particle size.
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