Synergistic Effects of Co3O4-CeO2 Nanoparticles towards Catalytic Oxidation of Aromatic Hydrocarbons: A Study in Association with Carbon Monoxide and Humidity

In this study, a series of Co3O4-CeO2 nanocomposites with various Co3O4 loading were fabricated by the impregnation method using cobalt(II) acetate as the cobalt precursor for the treatment of benzene, toluene, ethylbenzene, and xylene (BTEX). The as-prepared Co3O4-CeO2 nanocomposites were thoroughl...

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Bibliographic Details
Published in:Journal of nanomaterials 2021-05, Vol.2021, p.1-9
Main Authors: Dang-Bao, Trung, Phan, Hong Phuong, Nguyen, Phung Anh, Vo, Pham Phuong Trang, Huynh, Van Tien, Nguyen, Tri
Format: Article
Language:English
Subjects:
Adsorption
Aromatic hydrocarbons
Carbon monoxide
Catalytic activity
Catalytic oxidation
Cerium oxides
Cobalt oxides
Ethylbenzene
Hydrocarbons
Nanocomposites
Nanomaterials
Nanoparticles
Nitrates
Oxidation
Pore size
Porous materials
Reduction
Reproduction (biology)
Synergistic effect
Toluene
Xylene
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Summary:In this study, a series of Co3O4-CeO2 nanocomposites with various Co3O4 loading were fabricated by the impregnation method using cobalt(II) acetate as the cobalt precursor for the treatment of benzene, toluene, ethylbenzene, and xylene (BTEX). The as-prepared Co3O4-CeO2 nanocomposites were thoroughly characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Brumauer-Emmett-Teller (BET), hydrogen temperature-programmed reduction (H2-TPR), and temperature-programmed desorption (O2-TPD). The excellent reproduction of active oxygen species caused by the high dispersion of Co3O4 crystals on the CeO2 supports was established. In addition, the reduction peaks of Co3O4-CeO2 nanocomposites were found at much lower temperatures compared to pure CeO2, considering their unique redox property influencing on the high catalytic activity. Among the characterized materials, the 5.0 wt.% Co3O4 supported on CeO2 (5.0Co–Ce) was the best system for catalytic oxidation of xylene, along with excellent performances in the cases of benzene, ethylbenzene, and toluene. Its catalytic activity increased in the order: benzene
ISSN:1687-4110
1687-4129
DOI:10.1155/2021/5542281