Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 6, Issue 11, Pages 14332-14339Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b03006
Keywords
Carbon nitride quantum dots; SnNb2O6 nanosheets; H-2 production; Up-conversion property
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Funding
- National Natural Science Foundation of China [21477050, 21522603]
- Excellent Youth Foundation of Jiangsu Scientific Committee [BK20140011]
- Program for New Century Excellent Talents in University [NCET-13-0835]
- Henry Fok Education Foundation [141068]
- Innovation/Entrepreneurship Program of Jiangsu Province [[2016] 32]
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Two-dimensional (2D) nanosheet photocatalysts with appropriate band structure have aroused a great deal of research interest owing to their unique structural and electronic properties. In this work, carbon nitride quantum dots (CNQDs) with up-conversion property were constructed on SnNb2O6 ultrathin nanosheets by a facial hydrothermal process. The as-prepared CNQDs/SnNb2O6 OD/2D nanocomposites exhibited an enhanced photocatalytic performance of H-2 production under visible light irradiation (lambda > 420 nm). The up-conversion behavior of CNQDs endow the CNQDs/SnNb2O6 nanocomposites with the ability of photocatalytic H-2 production at wavelengths greater than 600 rim. Moreover, the introduced CNQDs could serve as effective electron collectors and promote the transfer of photogenerated charge carriers, which is elucidated by the transient photocurrent response and electrochemical impendence spectra. Finally, a plausible photocatalytic mechanism was proposed for CNQDs/SnNb2O6 nanocomposite toward the H-2 production from water splitting.
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