Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 43, Pages 50988-50995Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c15076
Keywords
two-dimensional materials; black phosphorus; carbon nitride; photocatalysis; heterostructure
Funding
- National Natural Science Foundation of China [51702352, 21975280, 21972006, 51802339]
- Youth Innovation Promotion Association Chinese Academy of Sciences [2020354]
- Guangdong Special Support Program [2017TX04C096]
- Key Research Program of Frontier Sciences, CAS [QYZDB-SSW-SLH034]
- Shenzhen Peacock Plan [KQTD2016053015544057]
- Guangdong Science and Technology Program [2017B030314002]
- City University of Hong Kong Strategic Research Grant (SRG) [7005105]
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In this study, a 2D heterostructure composed of nickel nanoparticle-decorated black phosphorus nanosheets and graphitic carbon nitride nanosheets was synthesized, demonstrating efficient charge separation and a high visible-light-driven H-2 evolution rate. Selective production of benzaldehyde was achieved by applying benzyl alcohol as a sacrificial agent.
Two-dimensional (2D) semiconductors are promising photocatalysts; in order to overcome the relatively low efficiency of single-component 2D photocatalysts, heterostructures are fabricated for effective charge separation. Herein, a 2D heterostructure is synthesized by anchoring nickel nanoparticle-decorated black phosphorus (BP) nanosheets to graphitic carbon nitride (CN) nanosheets (CN/BP@Ni). The CN/BP@Ni heterostructure exhibits an enhanced charge separation due to the tight interfacial interaction and the cascaded electron-transfer channel from CN to BP and then to Ni nanoparticles. Possessing abundant active sites of Ni and P-N coordinate bonds, CN/BP@Ni shows a high visible-light-driven H-2 evolution rate of 8.59 mmol.h(-1).g(-1) with the sacrificial agent EtOH, about 10-fold to that of CN/BP. When applying benzyl alcohol to consume photogenerated holes, CN/BP@Ni enables the selective production of benzaldehyde; therefore, two value-added products are obtained in a single closed redox cycle. This work provides new insights into the development of photocatalysts without non-noble metals.
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