期刊
CATALYSIS LETTERS
卷 150, 期 7, 页码 2021-2026出版社
SPRINGER
DOI: 10.1007/s10562-020-03123-0
关键词
OMS-2; Catalytic degradation; Metal ions; Heterogeneous
资金
- National Natural Science Foundation of China [21805166]
- 111 Project of Hubei Province [2018-19-1]
- Youth Innovation Promotion Association CAS [2018456]
- Research Fund for Excellent Dissertation of China Three Gorges University
Here we first designed, synthesized and compared Ni, Ag and Ce doped manganese oxide octahedral molecular sieves, (Ni-OMS-2, Ag-OMS-2 and Ce-OMS-2) for the catalytic degradation of organic dyes, such as reactive red 2, acid orange 7, methylene blue, and rhodamine B, in the presence of potassium peroxymonosulfate in aqueous solutions. These results show that the catalytic efficiency increases in the order of Ce-OMS-2 < OMS-2 < Ag-OMS-2 < Ni-OMS-2 for organic dyes degradation, which is in accordance with the concentration of oxygen vacancy defects on the surface of materials. Then pH condition and various amounts of Ni-OMS-2, organic dye and potassium peroxymonosulfate concentration have also been investigated for the reactive red 2 degradation. In addition, TEM and XRD have confirmed the heterogeneous catalyst Ni-OMS-2 has been successfully recycled at least 5 times with a very slight reduction efficiency by the simple filtration. Graphic Abstract We have designed, synthesized and compared Ni, Ag and Ce doped OMS-2, (Ni-OMS-2, Ag-OMS-2 and Ce-OMS-2) for the degradation of organic dyes. And they show the catalytic efficiency increases in the order of Ce-OMS-2 < OMS-2 < Ag-OMS-2 < Ni-OMS-2 for the degradation. [GRAPHICS] .
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