Morphology-activity correlation of electrospun CeO2 for toluene catalytic combustion

Dengfeng Yan; Shengpeng Mo; Yuhai Sun; Quanming Ren; Zhentao Feng; Peirong Chen; Junliang Wu; Mingli Fu; Daiqi Ye

doi:10.1016/j.chemosphere.2020.125860

Morphology-activity correlation of electrospun CeO₂ for toluene catalytic combustion

Chemosphere. 2020 May:247:125860. doi: 10.1016/j.chemosphere.2020.125860. Epub 2020 Jan 8.

Authors

Dengfeng Yan¹, Shengpeng Mo¹, Yuhai Sun¹, Quanming Ren¹, Zhentao Feng¹, Peirong Chen², Junliang Wu², Mingli Fu², Daiqi Ye³

Affiliations

¹ School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
² School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou, 510006, China.
³ School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, Guangzhou, 510006, China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control (SCUT), Guangzhou, 510006, China. Electronic address: cedqye@scut.edu.cn.

PMID: 32069710
DOI: 10.1016/j.chemosphere.2020.125860

Abstract

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 °C) at WHSV = 60,000 mL g^-1 h^-1, also exhibited the lowest activation energy (E_a = 80.2 kJ/mol). Based on the characterization by TEM, XRD, BET, SEM, XPS, Raman spectroscopy, H₂-TPR, and O₂-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.

Keywords: CeO(2) nanobelts; Electrospinning; Porous structure; Toluene catalytic combustion; VOCs abatement.

MeSH terms

Air Pollution / prevention & control
Catalysis
Cerium / chemistry*
Nanostructures / chemistry*
Nanotubes / chemistry
Oxygen / chemistry
Porosity
Toluene / chemistry*
Volatile Organic Compounds

Substances

Volatile Organic Compounds
Cerium
Toluene
ceric oxide
Oxygen