Journal
CHINESE CHEMICAL LETTERS
Volume 30, Issue 2, Pages 324-330Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2018.06.026
Keywords
Fenton-like reaction; Zeolite; Fe2O3 nanoparticles; Highly-dispersed; Phenol degradation
Categories
Funding
- Shanghai Pujiang Program, China [16PJ1401100]
- Shanghai Committee of Science and Technology, China [15ZR1402000]
- Key Basic Research Program of Science and Technology Commission of Shanghai Municipality [17JC1400100]
- NSF of China [21673048]
- National Youth Top Talent Support Program of National High-Level Personnel of Special Support Program (Youth Top-notch Talent Support Program)
- State Key Laboratory of Transducer Technology of China [SKT1503]
- International Scientific Partnership Program ISPP at King Saud University [0094]
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A versatile wet impregnation method was employed to conveniently and controllably deposit Fe2O3 nanoparticles on zeolites including commercial Y, mordenite and ZSM-5 with the similar framework Si/AI ratios and crystal sizes, respectively. The ultrafine Fe2O3 nanoparticles in size of 5 nm can be highly dispersed on zeolite Y matrix due to its much better wettability than ZSM-5 and mordenite. By using the obtained Fe2O3/zeolite composite as the heterogeneous Fenton-like catalysts, the degradation of phenol as a model reaction was systematically investigated, including the zeolite supports, particle size and dispersion of Fe2O3, and reaction conditions of H2O2 concentration, temperature, and pH value. The catalyst based on zeolite Y with Fe loading of 9% exhibited the best phenol degradation efficiency (> 90%) in neutral pH within 2 h. Its high catalytic activity in Fenton reaction can be attributed to the bifunctional properties of strong surface Bronsted acidity and high reactivity of octahedral Fe3+ in the highly-dispersed ultrafine Fe2O3 nanoparticles in size of 5 nm, which were the primary active centers to quickly decompose H2O2 into hydroxyl radicals. Since phenol degradation can be performed under mild conditions of ambient temperature (283-323 K) and a wide pH range (4.0-7.0), the catalysts can be easily recovered for recyclable use with stable degradation activity, which own the immense potential in deep treatment of organic pollutants in industrial wastewater. (C) 2018 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
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