Nanometer CeO 2 doped high silica ZSM-5 heterogeneous catalytic ozonation of sulfamethoxazole in water

A novel CeO doped high silica ZSM-5(CeO @HSZSM-5) composite was originally fabricated via ammonia precipitation for the catalytic ozonation of sulfamethoxazole (SMX). Physicochemical properties have been investigated through electron microscope, Raman spectroscopy, X-ray photoelectron spectroscopy,...

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Bibliographic Details
Published in:Journal of hazardous materials 2021-06, Vol.411, p.125072
Main Authors: Zuo, Xingtao, Ma, Senlin, Wu, Qiyuan, Xiong, Juan, He, Jiajie, Ma, Cong, Chen, Zhongbing
Format: Article
Language:English
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Summary:A novel CeO doped high silica ZSM-5(CeO @HSZSM-5) composite was originally fabricated via ammonia precipitation for the catalytic ozonation of sulfamethoxazole (SMX). Physicochemical properties have been investigated through electron microscope, Raman spectroscopy, X-ray photoelectron spectroscopy, etc. The prepared nanometer CeO @HSZSM-5 had a much higher specific surface (348-395 m /g), a finer crystallite size (8.2-33.5 nm) and superior stability. Temperature-programmed desorption and reduction analysis revealed that the formed CeO nanoparticles on the surface of CeO @HSZSM-5 could improve the reducibility of surface-capping oxygen, induce more oxygen vacancies and promote oxygen migration. CeO @HSZSM-5 exhibited excellent catalytic performance for SMX mineralization in the pH range of environmental waters. The great enhancement of CeO @HSZSM-5 catalytic activity was ascribed to the conversion of O into active oxygen involved in SMX mineralization, including OH, O and O . This work provides a reference for the removal of pollutants by zeolite supported Ce catalytic ozonation process in water.
ISSN:1873-3336