Rational design of a MOF@Au@COF catalyst with electron synergy for the reduction of 4-nitrophenol. (11th April 2023)

• Record Type: Journal Article
• Authors: Liu, Shangjin; Mao, Chunfeng; Yang, Chenghan; Hong, Pengda; Zhu, Min; Zhou, Yuming; Zhang, Yiwei
• Is Part Of: New journal of chemistry. Volume 47:Number 17(2023)
• Page Start: 8161
• Page End: 8169
• Publication Date: 2023-04-11
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj06160k
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : 4-Nitrophenol (4-NP) usually exists in soil and groundwater, which causes great harm to the environment and human health. Abstract : 4-Nitrophenol (4-NP) usually exists in soil and groundwater, which causes great harm to the environment and human health. Removal of 4-nitrophenol has become the focus of research. Herein, a smart synthetic strategy of NH2-MIL-88B(Fe)@Au@Covalent Organic Frameworks (COFs) is proposed for the first time. NH2 -MIL-88B(Fe)@Au@COFs are composed of NH2 -MIL-88B(Fe) as the core and COFs as the shell with Au nanoparticles. Au nanoparticles in NH2 -MIL-88B(Fe)@Au@COFs exhibit good dispersion and thermal stability due to amino group immobilization on NH2 -MIL-88B(Fe). The core–shell structure, high thermal stability and highly dispersed active sites of NH2 -MIL-88B(Fe)@Au@COFs were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), thermal gravimetric analysis (TGA), and so on. To the best of our knowledge, 4-nitrophenol was reduced to 4-aminophenol using NH2 -MIL-88B(Fe)@Au@COFs as the catalyst, NaBH4 as the reductant and 4-nitrophenol as the raw material at room temperature. The catalyst has high catalytic activity and can be used repeatedly for the reduction of 4-nitrophenol under the cooperation of Fe and Au electrons. In addition, the kinetics and mechanism of catalytic reduction were discussed in detail. Multi-functional materials constructed using metal organic frameworks (MOFs) and COFs provide a basis for the application and expansion of new porous materials.