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, 2017

中文翻译：

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类Fenton降解高耐用性Cu嵌入氧化铝上的若丹明B的动力学和机理

通过溶胶-凝胶法制得的Fenton状催化剂即Cu包埋的介孔氧化铝，具有优异的活性和耐久性，可用于降解食堂化合物。使用多种技术彻底研究了产生羟基自由基（•OH）的活性位点的来源。铜是唯一的活性元素，可以渗透到大部分氧化铝中，并且一些铜原子嵌入了骨架中。表面铜的动态结构（Cu ⁺ / Cu ²⁺的种类还确定了反应期间的比例。此外，通过优化制备条件和反应条件，证明了催化剂的结构可塑性。按照伪一级反应速率表达，在30分钟内记录到98.53％的RhB降解。电子自旋共振谱和•OH清除实验已证实•OH是消除RhB的主要活性氧化剂。通过表面增强拉曼光谱和气相色谱-质谱仪的结果，阐明了RhB降解的可能途径。©2017美国化学工程师学会AIChE J，2017