Journal
APPLIED SURFACE SCIENCE
Volume 351, Issue -, Pages 1146-1154Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.06.119
Keywords
Photocatalytic; Exposed facets; Cu-2 O@g-C-3 N-4; Hydrogen production
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Funding
- National Natural Science Foundation of China [51202056, 51372068]
- Hebei Natural Science Funds for Distinguished Young Scholar [B2014209304]
- Hebei Natural Science Funds for the Joint Research of Iron and Steel [B2014209314]
- Hebei Provincial Foundation for International Cooperation [15391403D]
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The creation of photocatalysts with controlled facets has become an important approach to enhance their activity. Cu2O octahedra formed entirely with {1 1 1} surfaces are more efficient for photocatalysis reactions than nanosphere. Core@shell structured Cu2O@g-C3N4 octahedra photocatalyst was prepared by a combined solvothermal and chemisorption method. Moreover, the Cu2O@g-C3N4 composites exhibit superior activity for H-2 production to pure Cu2O crystals and g-C3N4 nanosheets. The enhanced photocatalytic activity can be mainly attributed to a synergistic effect at the interface of the Cu2O octahedra and g-C3N4 including large contact area, energy band structure and enhanced charge separation properties. Interestingly, the hybrid core@shell octahedra possess high photostability. Our results provide a new approach for the rational design and development of graphitic carbon nitride composites and open the way to a range of important applications of crystal-facet-dependent materials. (C) 2015 Elsevier B.V. All rights reserved.
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