Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 529, Issue -, Pages 396-403Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.06.040
Keywords
Carbon quantum dots; Photoelectrochemistry; Upconversion; Synergistic effect; Hydrogen evolution
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Funding
- National Natural Science Foundation of China [51772049]
- National Postdoctoral Program for Innovative Talents [BX201600007]
- China Postdoctoral Science Foundation [2016M600894]
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Carbon quantum dots (CQDs) were synthesized by a facile and green pyrolysis method. The as-prepared CQDs show wide light absorption, tunable downconversion photoluminescence (PL) properties and excellent upconversion luminescence properties. CQDs were used to design the TiO2/CdS/C photoelectrodes for photoelectrochemical hydrogen evolution. The role of the CQDs was investigated based on the TiO2/CdS/C photoelectrodes. The results reveal that CQDs can enhance light-harvesting efficiency and improve their charge separation and transfer properties when coupled with conventional QD-sensitized photoelectrodes. Nevertheless, the contribution of upconversion luminescence of CQDs to the enhanced photoelectrochemical performance is negligible. (C) 2018 Elsevier Inc. All rights reserved.
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