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- Title
N, S co-doped carbon quantum dots modified TiO<sub>2</sub> for efficient hole extraction in photoelectrochemical water oxidation.
- Authors
Li, Yueying; Liang, Shiyu; Sun, Huanhuan; Hua, Wei; Wang, Jian-Gan
- Abstract
Severe bulk charge recombination, limited light harvesting ability, and sluggish surface catalytic kinetics are still the technical drawbacks of TiO2 photoanode for photoelectrochemical water splitting. Herein, an easy-handle hydrothermal-immersion method is adopted to prepare the nitrogen and sulfur co-doped CDs (NS-CDs) decorated TiO2 photoanode (NS-CDs/TiO2). With the synergistic effect of the hierarchical structure, the photocurrent of NS-CDs/TiO2 photoanode reaches to 2.1 mA cm-2 at 1.23 VRHE (1.3 times of bare TiO2). The enhancement is mainly ascribed to the drastically increased charge injection efficiency of NS-CDs/TiO2 (95%). Additionally, the introduction of NS-CDs can simultaneously enhance light harvest efficiency to generate more carriers and promote charge transport ability to suppress electron-hole recombination. These demonstrations may supply a simple strategy for designing excellent photocatalysts for solar energy conversion related applications.
- Publication
Journal of Materials Science: Materials in Electronics, 2023, Vol 34, Issue 24, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-023-11108-z