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Article Abstract
The Fe(III)/Fe(II) redox cycle is the main factor limiting the effectiveness of Fe-mediated advanced oxidation processes (AOPs) for the degradation of organic pollutants. In this study, the promoting effects of thin-layer AlO (t-AlO) between the frequently used FeCu components and the mesoporous silica support were studied to reduce Fe(III) to promote the activity of the Fenton-like catalyst. After modification by t-AlO, the mesoporous silicon-loaded FeCu catalyst removed 97% of Rhodamine B at pH 7, which was superior to the unmodified sample with a removal rate of 62.4% under the same conditions. Morphological characterization and X-ray diffraction patterns indicated that the Fe-Cu/t-AlO active components were highly dispersed. Pyridine infrared spectra suggested that all of the acid sites were Lewis acids, and the t-AlO-loaded samples provided moderate/strong Lewis acids. The loading of t-AlO between the FeCu complex and mesoporous silica support facilitated electron transfer during the Fe(III)/Fe(II) redox cycle by enhancing the dispersion of Fe-Cu/t-AlO and the Lewis acidity. The results of this study provide insight into how t-AlO promoted the interactions between the active components and silica support and how it can be used to aid in the selection of suitable wastewater treatment technologies.
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| http://dx.doi.org/10.1016/j.scitotenv.2022.153151 | DOI Listing |
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