期刊
ADVANCED ENERGY AND SUSTAINABILITY RESEARCH
卷 2, 期 8, 页码 -出版社
WILEY
DOI: 10.1002/aesr.202100038
关键词
advanced oxidation processes; AgFeO2; CaCO3; Density functional theory calculations; peroxymonosulfate
资金
- National Natural Science Foundation [51604194]
- Science and Technology Project of Henan Province [32340099]
- Graduate Innovative Fund of Wuhan Institute of Technology
- Nanyang Environment and Water Research Institute (Core Fund), Nanyang Technological University, Singapore
This study presents a self-assembly strategy to stabilize AgFeO2 on the surface of CaCO3 (AgFeO2@CaCO3), demonstrating excellent catalytic performance, stability, and degradation efficiency towards various organic pollutants.
The development of green and sustainable technologies for wastewater treatment is highly desirable but remains challenging. Herein, a self-assembly strategy to stabilize AgFeO2 on the surface of CaCO3 (AgFeO2@CaCO3) is demonstrated. This structure is discovered to significantly prohibit the agglomeration of AgFeO2 nanoparticles and strengthen the interaction between AgFeO2 and CaCO3. When utilized in advanced oxidation processes (AOPs), AgFeO2@CaCO3 exhibits excellent catalytic performance in activating peroxymonosulfate (PMS) to degrade multiple organic pollutants. For example, complete Rhodamine B (RhB) decomposition can be achieved by AgFeO2@CaCO3 in the presence of PMS at a degradation rate of 0.312min(-1), which is 44.6 times that of bare AgFeO2. In addition, AgFeO2@CaCO3 demonstrates excellent stability, recyclability, general applicability, and strong resistance to the solution pH. O-1(2) and O-2(-) are the predominant reactive oxygen species in RhB degradation. The rapid RhB degradation can be attributed to the mesoporous structure and high specific surface area of AgFeO2@CaCO3, the cycling of Fe(III)/Fe(II) and Ag(I)/Ag(0), and the presence of hydroxyl groups that facilities PMS activation, which is validated by density functional theory calculations. This study provides a feasible and scalable strategy to synthesize green and recyclable heterogeneous catalysts for wastewater remediation via PMS-based AOPs.
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