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In Situ Grown Single‐Atom Cobalt on Polymeric Carbon Nitride with Bidentate Ligand for Efficient Photocatalytic Degradation of Refractory Antibiotics
Author(s) -
Yang Yang,
Zeng Guangming,
Huang Danlian,
Zhang Chen,
He Donghui,
Zhou Chengyun,
Wang Wenjun,
Xiong Weiping,
Song Biao,
Yi Huan,
Ye Shujing,
Ren Xiaoya
Publication year - 2020
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.202001634
Subject(s) - cobalt , covalent bond , carbon nitride , materials science , photocatalysis , ligand (biochemistry) , denticity , photochemistry , degradation (telecommunications) , atom (system on chip) , chemistry , metal , organic chemistry , catalysis , metallurgy , biochemistry , receptor , computer science , embedded system , telecommunications
Semiconductor photocatalysis is a promising technology to tackle refractory antibiotics contamination in water. Herein, a facile in situ growth strategy is developed to implant single‐atom cobalt in polymeric carbon nitride (pCN) via the bidentate ligand for efficient photocatalytic degradation of oxytetracycline (OTC). The atomic characterizations indicate that single‐atom cobalt is successfully anchored on pCN by covalently forming the CoO bond and CoN bond, which will strengthen the interaction between single‐atom cobalt and pCN. This single‐atom cobalt can efficiently expand optical absorption, increase electron density, facilitate charge separation and transfer, and promote OTC degradation. As the optimal sample, Co(1.28%)pCN presents an outstanding apparent rate constant for OTC degradation (0.038 min −1 ) under visible light irradiation, which is about 3.7 times than that of the pristine pCN. The electron spin resonance (ESR) tests and reactive species trapping experiments demonstrate that the 1 O 2 , h + , •O 2 − , and •OH are responsible for OTC degradation. This work develops a new way to construct single‐atom‐modified pCN and provides a green and highly efficient strategy for refractory antibiotics removal.