Yolk-shell structured Fe@void@mesoporous silica with high magnetization for activating peroxymonosulfate |
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| Institution: | 1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China;2. Indian Institute of Technology Guwahati, Guwahati 781039, India;1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Institute of Functional Materials, Donghua University, Shanghai 201620, China;2. State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;3. College of Life and Environmental Sciences, Shanghai Normal University, Shanghai 200234, China;4. University of Chinese Academy of Sciences, Beijing 100049, China;1. Laboratory of Advanced Materials, Department of Chemistry, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, iChEM and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China;2. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Institute of Functional Materials, Donghua University, Shanghai 201620, China;3. Department of Stomatology, Zhongshan Hospital, Fudan University, Shanghai 200032, China |
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| Abstract: | Sulfate radical anion (SO4⿿) based Fenton-like reaction have recently received a large quantity of attention owing to their strong oxidative capacity and high selectivity toward organic pollutants. However, the development of a high-efficient catalyst for activation of peroxymonosulfate (PMS) with a fast separation is still challengeable. Herein, magnetic mesoporous silica composites with a yolk-shell structure (Fe@void@mSiO2) have been prepared via a successive coating strategy, followed by a high-temperature in-situ treatment and demonstrated as a high-efficient and fast magnetic separable catalyst for the activation of PMS. The resultant material possesses a well-defined yolk⿿shell structure with high specific surface area (⿼495.0⿿m2/g), uniform pore size (⿼6.9⿿nm) and super large magnetic susceptibility (⿼105⿿emu/g). Owing to the unique properties, the material possesses an excellent degradation activity for tetracyclines (TC), which is much higher than the commercialized Zero Valent Iron (ZVI) nanoparticles. Additionally, the catalyst is able to work over a broad pH range and be quickly recycled by using an external magnetic field. This research provides a promising strategy for the synthesis and design of multifunctional catalyst for the Fenton-like process. |
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| Keywords: | Yolk-shell Magnetic mesoporous silica Fenton-like process PMS activation Tetracyclines |
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