首页|Enhanced visible-light harvesting of triazine-based covalent organic frameworks by incorporating Fe~(III)-tannic acid complexes for high-efficiency photocatalysis
Enhanced visible-light harvesting of triazine-based covalent organic frameworks by incorporating Fe~(III)-tannic acid complexes for high-efficiency photocatalysis
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NSTL
Triazine-based covalent organic frameworks(COFs)have recently emerged as a new class of photocatalysts for visible-light-driven photocatalytic reactions.However,the optical absorption edge of triazine-based COFs is usually below 550 nm,resulting in inefficient photocatalytic performance.Herein,a novel Fe~(III)-tannic acid(Fe~(III)-TA)complexes evenly coating a triazine-based COF(Fe~(III)-TA@TTB-TTA)was prepared using a simple self-assembly process.The Fe~(III)-TA significantly enhanced the optical absorption of TTB-TTA,especially in the X>600 nm region.Consequently,the composite photocatalyst exhibited a higher photodegradation rate of methyl orange(MO),corresponding to a 14-fold enhancement,compared with the bare TTB-TTA.Moreover,the degradation rate was 372 times higher under>600 nm light illumination,indicating that the photocatalytic enhancement mechanism primarily came from the enhanced visible-light harvesting capacity of Fe~(III)-TA.This work offers a promising avenue for enhancing the visible-light absorption of triazine-based COFs and providing insights into the research of high-performance photocatalysts.
NSTL
