Transition metal doping effect and high catalytic activity of CeO2–TiO2 for chlorinated VOCs degradation
| Autor: | Zhinan Shi, Xiaolin Guo, Yijun Shi, Renxian Zhou |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
Chemistry
Doping Inorganic chemistry 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis Transition metal Characterization methods Geochemistry and Petrology Degradation (geology) Texture (crystalline) 0210 nano-technology |
| Zdroj: | Journal of Rare Earths. 40:745-752 |
| ISSN: | 1002-0721 |
| DOI: | 10.1016/j.jre.2021.02.005 |
| Popis: | A series of transition metals (Fe, Co, Ni, Cu, Cr and Mn)-doped CeO2-TiO2 catalysts were prepared by the sol-gel method and applied for the catalytic removal of 1,2-dichloroethane (DCE) as a model for chlorinated VOCs (CVOCs). The various characterization methods (XRD, N2 adsorption-desorption, UV-Raman, NH3-TPD and H2-TPR) were utilized to investigate the physicochemical properties of the catalysts. The results show that doping Fe, Co, Ni or Mn can obviously promote the activity of CeO2-TiO2 mixed oxides for DCE degradation, which is related to their improved texture properties, acid sites (especially for strong acidity) and low-temperature reducibility. Particularly, CeTi-Fe doped with moderate Fe exhibits excellent activity for DCE degradation, giving a T90% value as low as 250 °C. More importantly, only trace chlorinated byproducts were produced during the low-temperature degradation of various CVOCs (DCM, TCE, CB) over CeTi-Fe1/9 catalyst with high durability. |
| Databáze: | OpenAIRE |
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