Journal
CHEMSUSCHEM
Volume 14, Issue 18, Pages 3850-3857Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.202101308
Keywords
band gap; covalent triazine-based frameworks; hydrogen evolution; iron doping; visible-light photocatalysis
Funding
- National Natural Science Foundation of China [51672047]
- Youth Talent Support Program of Fujian Province [00387077]
- Natural Science Foundation of Fujian Province [2019J01648]
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A trivalent iron-doped covalent triazine-based framework was designed to enhance photocatalytic activity for hydrogen production, achieving a significant improvement in efficiency.
Photocatalytic hydrogen energy production through water splitting paves a promising pathway for alleviating the increasingly severe energy crisis. Seeking affordable, highly active, and stable photocatalysts is crucial to access the technology in a sustainable manner. Herein, a trivalent iron-doped covalent triazine-based framework (CTF-1) was elaborately designed in this study to finely tune the band structure and photocatalytic activity of CTF-1 for H-2 production. With optimal doping amount, Fe-10/CTF-1 exhibited a satisfying H-2 production activity of 1460 mu mol h(-1) g(-1), corresponding to 28-fold enhancement compared with pure CTF-1. The Fe3+ doping is responsible for a remarkedly broadened visible-light adsorption range, improved reduction ability and inhibited electron-hole recombination of CTF-1. Specifically, the doped Fe3+ could serve as photocatalytically active center and electron relay to accelerate charge separation and transformation. This study offers a feasible strategy to validly design and synthesize CTF-based photocatalytic materials to efficiently utilize solar energy.
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