Free-standing hierarchical α-MnO2 @CuO membrane for catalytic filtration degradation of organic pollutants

Chemosphere
Xinsheng LuoGuibai Li

Abstract

Catalytic membrane, due to its compact reactor assembling, high catalytic performance as well as low energy consumption, has proved to be more attractive for wastewater treatment. In this work, a free-standing α-MnO2@CuO membrane with hierarchical nanostructures was prepared and evaluated as the catalytic membrane to generate radicals from peroxymonosulfate (PMS) for the oxidative degradation of organic dyes in aqueous solution. Benefiting from the high mass transport efficiency and the hierarchical nanostructures, a superior catalytic activity of the membrane was observed for organic dyes degradation. As a typical organic dye, more than 99% of methylene blue (MB) was degraded within 0.23 s using dead-end filtration cell. The effects of flow rate, PMS concentration and buffer solution on MB degradation were further investigated. Besides MB, the catalytic membrane also showed excellent performance for the removal of other dyes, such as congo red, methyl orange, rhodamine B, acid chrome blue K and malachite green. Moreover, the mechanism study indicated that OH and SO4- generated from the interaction between PMS and Mn/Cu species with different oxidation states mainly accounted for the dyes degradation. The catalytic filtration p...Continue Reading

References

Jul 21, 2006·The Journal of Physical Chemistry. B·Gang ChangKazuyuki Hirao
May 25, 2010·Chemosphere·Anu Matilainen, Mika Sillanpää
May 24, 2013·Physical Chemistry Chemical Physics : PCCP·Shaodong SunZhimao Yang
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Sep 3, 2016·Environmental Science & Technology·Hongshin LeeJae-Hong Kim

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Citations

Feb 26, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Simeone ChianeseStefano Salvestrini
Jan 16, 2021·Advanced Materials·Ruijie YangZhiyuan Zeng
Jan 19, 2021·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Siru ZhouHongwei Zhang
Sep 15, 2019·Environment International·Jianzhi Huang, Huichun Zhang
Dec 8, 2020·Environmental Pollution·Jagannathan MohanrajRajendran Saravanan

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