A High-Efficiency CuO/CeO(2) Catalyst for Diclofenac Degradation in Fenton-Like System

An efficient Fenton-like catalyst CuO/CeO(2) was synthesized using ultrasonic impregnation and used to remove diclofenac from water. The catalyst was characterized by N(2) adsorption-desorption, SEM-EDS, XRD, HRTEM, Raman, and XPS analyses. Results showed that CuO/CeO(2) possessed large surface area...

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Detalles Bibliográficos
Autores principales: Zhu, Jia, Zhang, Guangming, Xian, Guang, Zhang, Nan, Li, Jinwei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2019
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6877685/
https://www.ncbi.nlm.nih.gov/pubmed/31803724
http://dx.doi.org/10.3389/fchem.2019.00796
Descripción
Sumario:An efficient Fenton-like catalyst CuO/CeO(2) was synthesized using ultrasonic impregnation and used to remove diclofenac from water. The catalyst was characterized by N(2) adsorption-desorption, SEM-EDS, XRD, HRTEM, Raman, and XPS analyses. Results showed that CuO/CeO(2) possessed large surface area, high porosity, and fine elements dispersion. Cu was loaded in CeO(2), which increased the oxygen vacancies. The exposed crystal face of CeO(2) (200) was beneficial to the catalytic activity. The diclofenac removal experiment showed that there was a synergistic effect between CuO and CeO(2), which might be caused by more oxygen vacancies generation and electronic interactions between Cu and Ce species. The experimental conditions were optimized, including pH, catalyst and H(2)O(2) dosages, and 86.62% diclofenac removal was achieved. Diclofenac oxidation by ·OH and adsorbed oxygen species was the main mechanism for its removal in this Fenton-like system.

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