Core-Shell-Like Structured Co 3 O 4 @SiO 2 Catalyst for Highly Efficient Catalytic Elimination of Ozone

• Published in: Frontiers in chemistry Vol. 9; p. 803464
• Main Authors: Ding, Jingya, Cheng, Feng, Meng, Zhen, Cao, Yan, Han, Fennv, Chen, Dongbin, Cao, Mingxiang, Zhang, Guolin, Kang, Jiahao, Xu, Shuxiang, Xu, Qi
• Format: Journal Article
• Language: English
• Published: Switzerland 2021
• Subjects: relative humidity 1. introduction; ozone decomposition; Core@Shell constructure; SiO2; Co3O4
• ISSN: 2296-2646; 2296-2646

Co O is an environmental catalyst that can effectively decompose ozone, but is strongly affected by water vapor. In this study, Co O @SiO 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 , the prepared Co O @SiO obtained 95% ozone decomposition for 40 ppm ozone after 6 h, which far outperformed that of the 25wt% Co O /SiO catalysts. The superiority of Co O @SiO is ascribed to its core@shell structure, in which Co O is wrapped inside the SiO shell structure to avoid air exposure. This research provides important guidance for the high humidity resistance of catalysts for ozone decomposition.