期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 22, 页码 14118-14124出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b02961
关键词
photocatalysis; carbon quantum dots; hydrothermal method; hydrogen evolution; photoelectron kinetics
资金
- National 973 project from National Basic Research Program of China [2014CB931702]
- National Natural Science Foundation of China [61222403, 11574263]
- Open Research Fund of State Key Laboratory of Bioelectronics of Southeast University [I2015005]
- Personnel Training Plan of Yangzhou University
Well-steered transport of photogenerated carriers in optoelectronic systems underlies many emerging solar conversion technologies, yet assessing the charge transition route in nanomaterials remains a challenge. Herein, we combine the photoinduced absorption, emission, and excitation properties in high luminescent carbon quantum dots (CQDs) with an amino modified surface to identify the existence of three photoelectron transition channels, that is, near-band-edge transition, multiphoton active transition in CQDs, and transfer from amino groups to CQDs, and together they contribute to strong blue photoluminescence (PL) independent of the excitation wavelength. Moreover, the enriching electron reservoir via these three channels was demonstrated in a holes cleaning environment to efficiently trigger water splitting into hydrogen with excellent stability and recyclability.
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