Core-Shell-Like Structured Co3O4@SiO2 Catalyst for Highly Efficient Catalytic Elimination of Ozone

Jingya Ding; Feng Cheng; Zhen Meng; Yan Cao; Fennv Han; Dongbin Chen; Mingxiang Cao; Guolin Zhang; Jiahao Kang; Shuxiang Xu; Qi Xu

doi:10.3389/fchem.2021.803464

Core-Shell-Like Structured Co₃O₄@SiO₂ Catalyst for Highly Efficient Catalytic Elimination of Ozone

Front Chem. 2021 Dec 9:9:803464. doi: 10.3389/fchem.2021.803464. eCollection 2021.

Authors

Jingya Ding¹, Feng Cheng², Zhen Meng¹, Yan Cao¹, Fennv Han¹, Dongbin Chen¹, Mingxiang Cao¹, Guolin Zhang³, Jiahao Kang¹, Shuxiang Xu¹, Qi Xu¹

Affiliations

¹ School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, China.
² Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng, China.
³ School of Mechanical Engineering, Yancheng Institute of Technology, Yancheng, China.

Abstract

Co₃O₄ is an environmental catalyst that can effectively decompose ozone, but is strongly affected by water vapor. In this study, Co₃O₄@SiO₂ catalysts with a core-shell-like structure were synthesized following the hydrothermal method. At 60% relative humidity and a space velocity of 720,000 h^-1, the prepared Co₃O₄@SiO₂ obtained 95% ozone decomposition for 40 ppm ozone after 6 h, which far outperformed that of the 25wt% Co₃O₄/SiO₂ catalysts. The superiority of Co₃O₄@SiO₂ is ascribed to its core@shell structure, in which Co₃O₄ is wrapped inside the SiO₂ shell structure to avoid air exposure. This research provides important guidance for the high humidity resistance of catalysts for ozone decomposition.

Keywords: Co3O4; Core@Shell constructure; SiO2; ozone decomposition; relative humidity 1. introduction.