Affiliation:
1. Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Carbon Neutrality Interdisciplinary Science Centre/College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
Abstract
The performance optimization of isolated atomically dispersed metal active sites is critical but challenging. Here, TiO
2
@Fe species-N-C catalysts with Fe atomic clusters (ACs) and satellite Fe-N
4
active sites were fabricated to initiate peroxymonosulfate (PMS) oxidation reaction. The AC-induced charge redistribution of single atoms (SAs) was verified, thus strengthening the interaction between SAs and PMS. In detail, the incorporation of ACs optimized the HSO
5
-
oxidation and SO
5
·−
desorption steps, accelerating the reaction progress. As a result, the Vis/TiFeAS/PMS system rapidly eliminated 90.81% of 45 mg/L tetracycline (TC) in 10 min. The reaction process characterization suggested that PMS as an electron donor would transfer electron to Fe species in TiFeAS, generating
1
O
2
. Subsequently, the h
VB
+
can induce the generation of electron-deficient Fe species, promoting the reaction circulation. This work provides a strategy to construct catalysts with multiple atom assembly–enabled composite active sites for high-efficiency PMS-based advanced oxidation processes (AOPs).
Funder
Tianjin Science and Technology Bureau as a Key Science and Technology Supporting Project
National Natural Science Foundation of China as a Shandong Joint Fund Project
Ministry of Science and Technology of People's Republic of China as a Key Technology Research and Development Program Project
Publisher
Proceedings of the National Academy of Sciences
Cited by
87 articles.
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