催化作用
X射线光电子能谱
化学
拉曼光谱
化学工程
选择性催化还原
比表面积
矿化(土壤科学)
氧气
吸附
解吸
微晶
无机化学
核化学
有机化学
氮气
结晶学
工程类
物理
光学
作者
Xingtao Zuo,Senlin Ma,Qiyuan Wu,Juan Xiong,Jiajie He,Cong Ma,Zhongbing Chen
标识
DOI:10.1016/j.jhazmat.2021.125072
摘要
A novel CeO2 doped high silica ZSM-5(CeO2@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 CeO2@HSZSM-5 had a much higher specific surface (348–395 m2/g), a finer crystallite size (8.2–33.5 nm) and superior stability. Temperature-programmed desorption and reduction analysis revealed that the formed CeO2 nanoparticles on the surface of CeO2@HSZSM-5 could improve the reducibility of surface-capping oxygen, induce more oxygen vacancies and promote oxygen migration. CeO2@HSZSM-5 exhibited excellent catalytic performance for SMX mineralization in the pH range of environmental waters. The great enhancement of CeO2@HSZSM-5 catalytic activity was ascribed to the conversion of O3 into active oxygen involved in SMX mineralization, including .OH, O2.– and 1O2. This work provides a reference for the removal of pollutants by zeolite supported Ce catalytic ozonation process in water.
科研通智能强力驱动
Strongly Powered by AbleSci AI