Morphology-activity correlation of electrospun CeO2 for toluene catalytic combustion

作者：Yan, Dengfeng; Mo, Shengpeng; Sun, Yuhai; Ren, Quanming; Feng, Zhentao; Chen, Peirong; Wu, Junliang; Fu, Mingli; Ye, Daiqi^*

来源：Chemosphere, 2020, 247: 125860.

DOI：10.1016/j.chemosphere.2020.125860

• VOCs abatement
• Electrospinning
• CeO2 nanobelts
• Porous structure
• Toluene catalytic combustion

Herein, CeO2 catalysts with nanotube, nanobelt, and wire-in-nanotube morphologies were successfully fabricated by a facile single spinneret electrospinning technique. And catalytic activity of these electrospun CeO2 nanomaterials were evaluated by toluene catalytic combustion reaction. Among the three morphologies of CeO2 catalysts, CeO2 nanobelt (CeO2-NB) presented the best toluene catalytic combustion performance (T-90% = 230 degrees C) at WHSV = 60,000 mL g(-1) h(-1), also exhibited the lowest activation energy (Ea = 80.2 kJ/mol). Based on the characterization by TEM, XRD, BET, SEM, XPS, Raman spectroscopy, H-2-TPR, and O-2-TPD results, the high catalytic activity of CeO2-NB catalyst was attributed to its porous nanobelt morphology with larger specific surface area and the abundance of surface oxygen vacancies. Furthermore, the CeO2-NB catalysts presented an excellent durability by longtime on-stream test (as well as presence of 5% vol. water vapor), suggesting its great potential for practical air pollution control application.