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Many recent advances in creating heterostructures based on 2D materials have opened new possibilities in catalysis. This study prepared a new 2D hybrid photocatalyst (CBN-x) consisting of CN and h-BN using low-cost precursors (urea and boric acid). The effects of CN loading on the structure, surface chemistry and photocatalytic activities were systematically investigated. The photocatalytic activities of CBN-x samples were tested for the production of H-2 and H2O2, which demonstrated markedly enhanced activities without the need of noble metal co-catalysts. However, CBN-x activities for the photocatalytic oxidation of organic compound were not better than that of h-BN. Loading CN on h-BN sheets, C 2p and N 2p orbitals from CN introduce new valence and conduction band edges, which gradually narrowed the bandgap and enhanced light absorption efficiency of the hybrid photocatalysts. In such metal-free systems, electrons generated in CN transfer to h-BN, while photo-generated holes on h-BN transfer to CN, which enhances the charge separation through the heterojunction interface (CN/BN). Therefore, increasing the CN loading enhances the overall efficiency of photocatalysis until excessive loading of CN covers the active sites on h-BN.
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NANO ENERGY
ISSN: 2211-2855
Year: 2017
Volume: 42
Page: 58-68
1 3 . 1 2
JCR@2017
1 6 . 8 0 0
JCR@2023
ESI Discipline: MATERIALS SCIENCE;
ESI HC Threshold:306
JCR Journal Grade:1
CAS Journal Grade:1
Cited Count:
WoS CC Cited Count: 159
SCOPUS Cited Count: 170
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1
Affiliated Colleges: