Fenton‐like degradation of rhodamine B over highly durable Cu‐embedded alumina: Kinetics and mechanism |
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| Authors: | Yiyi Sheng Yang Sun Jing Xu Jie Zhang Yi‐Fan Han |
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| Affiliation: | 1. State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;2. Research Center of Heterogeneous Catalysis and Engineering Sciences, School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China |
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| Abstract: | ![]()
Cu‐embedded mesoporous alumina, as a Fenton‐like catalyst prepared via a sol‐gel method, showed excellent activity and durability for the degradation of refectory compounds. The origin of active sites for the generation of hydroxyl radicals (?OH) were thoroughly studied using multitechniques. Cu, as the only active element, could be penetrated into the bulk of alumina and some Cu atoms were embedded into the framework. The dynamic structure of surface Cu species (the variety of Cu+/Cu2+ ratio) during the reaction were determined as well. Furthermore, the structure plasticity of catalyst has proved by optimizing preparation and reaction conditions. A 98.53% degradation of RhB was recorded within 30 min, following a pseudo‐first‐order reaction rate expression. Electron spin resonance spectra and ?OH scavenging experiments have confirmed that ?OH is the main reactive oxidant for the elimination of RhB. By the surface‐enhanced Raman spectroscopy and gas chromatography‐mass spectrometer results, plausible pathways of RhB degradation were elaborated. © 2017 American Institute of Chemical Engineers AIChE J, 64: 538–549, 2018 |
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| Keywords: | Fenton‐like catalyst Cu‐embedded alumina dynamic structure RhB degradation hydroxyl radicals kinetics |
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