Magnetic ordered mesoporous Fe3O4/CeO2 composites with synergy of adsorption and Fenton catalysis
发表时间：2019-03-11
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- 论文类型：
- 期刊论文
- 第一作者：
- Li, Keyan
- 通讯作者：
- Guo, XW (reprint author), Dalian Univ Technol, Sch Chem Engn, PSU DUT Joint Ctr Energy Res, State Key Lab Fine Chem, Dalian 116024, Peoples R China.
- 合写作者：
- Zhao, Yongqin,Song, Chunshan,Guo, Xinwen
- 发表时间：
- 2017-12-15
- 发表刊物：
- APPLIED SURFACE SCIENCE
- 收录刊物：
- Scopus、SCIE、EI
- 文献类型：
- J
- 卷号：
- 425
- 页面范围：
- 526-534
- ISSN号：
- 0169-4332
- 关键字：
- Fe3O4/CeO2; Mesoporous; Oxygen vacancy; Fenton-like; Synergistic effect
- 摘要：
- Magnetic Fe3O4/CeO2 composites with highly ordered mesoporous structure and large surface area were synthesized by impregnation-calcination method, and the mesoporous CeO2 as support was synthesized via the hard template approach. The composition, morphology and physicochemical properties of the materials were characterized by XRD, SEM, TEM, XPS, Raman spectra and N-2 adsorption/desorption analysis. The mesoporous Fe3O4/CeO2 composite played a dual-function role as both adsorbent and Fenton-like catalyst for removal of organic dye. The methylene blue ( MB) removal efficiency of mesoporous Fe3O4/CeO2 was much higher than that of irregular porous Fe3O4/CeO2. The superior adsorption ability of mesoporous materials was attributed to the abundant oxygen vacancies on the surface of CeO2, high surface area and ordered mesoporous channels. The good oxidative degradation resulted from high Ce3+ content and the synergistic effect between Fe and Ce. The mesoporous Fe3O4/CeO2 composite presented low metal leaching ( iron 0.22 mg L-1 and cerium 0.63 mg L-1), which could be ascribed to the strong metal-support interactions for dispersion and stabilization of Fe species. In addition, the composite can be easily separated from reaction solution with an external magnetic field due to its magnetic property, which is important to its practical applications. (C) 2017 Elsevier B.V. All rights reserved.
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- 否
