Citation: Longxing Hu, Guihua Deng, Wencong Lu, Yongsheng Lu, Yuyao Zhang. Peroxymonosulfate activation by Mn₃O₄/metal-organic framework for degradation of refractory aqueous organic pollutant rhodamine B[J]. Chinese Journal of Catalysis, ;2017, 38(8): 1360-1372. shu

Peroxymonosulfate activation by Mn₃O₄/metal-organic framework for degradation of refractory aqueous organic pollutant rhodamine B

a School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China;
b College of Sciences, Shanghai University, Shanghai 200444, China

Received Date: 26 April 2017
Revised Date: 19 June 2017

Fund Project: This work was supported by the National Key Research and Development Program of China (2016YFB0700504).

An environmentally friendly Mn-oxide-supported metal-organic framework (MOF), Mn₃O₄/ZIF-8, was successfully prepared using a facile solvothermal method, with a formation mechanism proposed. The composite was characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron microscopy, and Fourier-transform infrared spectroscopy. After characterization, the MOF was used to activate peroxymonosulfate (PMS) for degradation of the refractory pollutant rhodamine B (RhB) in water. The composite prepared at a 0.5:1 mass ratio of Mn₃O₄ to ZIF-8 possessed the highest catalytic activity with negligible Mn leaching. The maximum RhB degradation of approximately 98% was achieved at 0.4 g/L 0.5-Mn/ZIF-120, 0.3 g/L PMS, and 10 mg/L initial RhB concentration at a reaction temperature of 23℃. The RhB degradation followed first-order kinetics and was accelerated with increased 0.5-Mn/ZIF-120 and PMS dosages, decreased initial RhB concentration, and increased reaction temperature. Moreover, quenching tests indicated that ·OH was the predominant radical involved in the RhB degradation; the ·OH mainly originated from SO₄^-·and, hence, PMS. Mn₃O₄/ZIF-8 also displayed good reusability for RhB degradation in the presence of PMS over five runs, with a RhB degradation efficiency of more than 96% and Mn leaching of less than 5% for each run. Based on these findings, a RhB degradation mechanism was proposed.
- Peroxymonosulfate activation,
- Refractory organic pollutant,
- Degradation,
- Metal-organic framework,
- Mn₃O₄/ZIF-8
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沈阳化工大学材料科学与工程学院沈阳 110142

Peroxymonosulfate activation by Mn3O4/metal-organic framework for degradation of refractory aqueous organic pollutant rhodamine B

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通讯作者: 陈斌, bchen63@163.com

Peroxymonosulfate activation by Mn₃O₄/metal-organic framework for degradation of refractory aqueous organic pollutant rhodamine B