Novel magnetic MnO2/MnFe2O4 nanocomposite as a heterogeneous catalyst for activation of peroxymonosulfate (PMS) toward oxidation of organic pollutants

By Gong Chen, Xinyi Zhang, Yingjie Gao, Guixian Zhu, Qingfeng Cheng, Xiuwen Cheng. Separation and Purification Technology, 2019

201 citations recorded by the source corpus.

Abstract Novel magnetic MnO2/MnFe2O4 nanocomposite was successfully fabricated by hydrothermal method. Subsequently, this nanocomposite was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microcopy (TEM), X-ray photoelectron spectra (XPS), vibrating sample magnetometer (VSM) and Brunauer-Emmett-Teller (BET) measurements. Then the material was applied to activate PMS for Rhodamine B (Rh B) degradation. The results displayed that the decomposition efficiency of the MnO2/MnFe2O4 nanocomposite with a mole ratio of 7:1 was 90% for Rh B within 5 min in the presence of PMS, higher than other MnO2/MnFe2O4 ratio, homogeneous catalysts (Fe3+ and Mn2+), pure MnO2 and pure MnFe2O4. In addition, influences of pivotal factors (PMS concentration, catalyst dosage and initial pH value), performance of different processes and reusability of MnO2/MnFe2O4 nanocomposite were also evaluated. Radical scavenging experiments were conducted and SO4 − was indicated as the primary radical. What’s more, the MnO2/MnFe2O4 nanocomposite could be convenient to recycle in practical application benefited from its magnetism. Finally, according to the results and previous studies, the believable mechanism of activating PMS by MnO2/MnFe2O4 nanocomposite was put forward, which could occupy an important position as a fast treatment option in sewage disposal.

Subfields: Industrial and Manufacturing Engineering, Renewable Energy, Sustainability and the Environment, Water Science and Technology

View Paper: https://www.semanticscholar.org/paper/fcca9241ed2485bb82ab9e3691e28ef2a3157e53

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

1. Y. Mu
2. Chun Huang
3. Yulang Wang
4. M. Gong
5. Wei Wang
6. Zhen-hu Hu

Citations in the corpus

• α-MnO2/Palygorskite composite as an effective catalyst for heterogeneous activation of peroxymonosulfate (PMS) for the degradation of Rhodamine B (2020, methodology): “These results might be because more active sites were provided with increasing catalyst concentration [1,23].”