作者：Qing Sun; Jiale Yu; Jingfeng Zhao; Jian Zhang; Jiawei Sheng
作者單位：College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, China;College of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou,Zhejiang,310014,China;College of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou,Zhejiang,310014,China
刊名：Ceramics International
ISSN：0272-8842
出版年：2024-10-10
卷：50
期：21
起頁：42798-42808
止頁：
分類號：
語種：英文
關鍵詞：MOF-Driven hybrid catalyst;Structure evolution;Peroxymonosulfate activation;Mechanisms exploration
內容簡介The spinel-type cobalt oxide decorated halloysite nanotubes (HNTs), Co3O4/HNTs and Co1-xAlx(CoxAl2-x)O4/HNTs hybrid catalysts were fabricated via a facile two-step process: synthesis of Co-MOF/HNTs composites, followed by annealing treatment at 300–900 °C for 2 h. The novel catalysts can be used to efficiently activate peroxymonosulfate (PMS) degrade of the refractory pollutant norfloxacin (NOR) in aqueous solution. Additionally, the adsorption process of the HNTs enhanced the elimination performance of NOR by the catalysts. We investigated how annealing temperature affected the crystalline structure and cation distributions of Co2+ and Al3+ occupying tetrahedral and octahedral interstices of the oxygen sub-lattice. The results exhibited that two types of spinel reconstructions, namely Co3O4 and CoAl2O4, fixed on HNTs existed in temperature ranging of 300–600 °C and above 900 °C, respectively. However is the presence of composite spinel Co1-xAlx(CoxAl2-x)O4 was present at 700–800 °C. The study also revealed that precursor thermal behavior significantly influenced the activity, ion leaching, metal coordination structures, and oxygen coordination structures of the catalysts. The simultaneous generation of oxygen vacancies during the doping of Al changes the inherent electronic structure of the oxide, resulting in a lower coordination number of Co and the presence of more dangling bonds on the surface, and the Co2+ near the oxygen vacancies will preferentially adsorb the active oxide, promoting the transfer of electrons on the catalyst surface. The present study provides insights into constructing modified mineral material catalysts with enhanced catalysis and adsorption capabilities as promising solutions for peroxymonosulfate purification applications targeting multi-antibiotic contaminants.
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