Encapsulating Pt Nanoparticles through Transforming Fe3O4 into MIL-100(Fe) for Well-Defined Fe3O4@Pt@MIL-100(Fe) Core-Shell Heterostructures with Promoting Catalytic Activity

Xi Chen; Yanshuang Zhang; Yihu Zhao; Shan Wang; Lingzhi Liu; Wenyuan Xu; Zanru Guo; Shaohui Wang; Yongxin Liu; Jiali Zhang

doi:10.1021/acs.inorgchem.9b02114

Encapsulating Pt Nanoparticles through Transforming Fe₃O₄ into MIL-100(Fe) for Well-Defined Fe₃O₄@Pt@MIL-100(Fe) Core-Shell Heterostructures with Promoting Catalytic Activity

Inorg Chem. 2019 Sep 16;58(18):12433-12440. doi: 10.1021/acs.inorgchem.9b02114. Epub 2019 Sep 6.

Authors

Affiliations

¹ School of Material Science and Engineering , East China Jiaotong University , Shuanggang Road 808 , Nanchang , 330013 , People's Republic of China.
² State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry , Chinese Academy of Sciences , Renmin Street 5625 , Changchun 130022 , People's Republic of China.

PMID: 31522504
DOI: 10.1021/acs.inorgchem.9b02114

Abstract

Metal-organic framework (MOF)-based magnetic Pt catalyst Fe₃O₄@Pt@MIL-100(Fe) core-shell heterostructures were prepared through transforming Fe₃O₄ into MIL-100(Fe) in benzene-1,3,5-tricarboxylic acid solution along with encapsulating the Pt nanoparticles successively adsorbed onto the surface of the Fe₃O₄ nanosphere and the continuously forming surfaces of the growing MIL-100(Fe) crystals. This method circumvented the obstacles, controlling the formation of metal nanoparticles (MNPs) inside MOFs or regulating growth of MOFs around the MNPs, for preparing an MNP-MOF composite catalyst. The obtained well-defined Fe₃O₄@Pt@MIL-100(Fe) core-shell heterostructure was shown promoting catalytic activity on the reduction of 4-nitrophenol due to the synergistic effect between the Pt nanoparticles and the MIL-100(Fe) shell and recycling convenience due to the rapid separation of the Fe₃O₄ core under an external magnetic field.