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Surface modification of MIL-101(Cr) metal-organic framework in tetrahydropyran aqueous solution by radiolytic method

Authors :
YU Ming
LIU Zepeng
LIU Sha
LI Wanxin
WANG Ziqiang
LI Linfan
LI Jingye
Source :
Fushe yanjiu yu fushe gongyi xuebao, Vol 41, Iss 1, Pp 16-23 (2023)
Publication Year :
2023
Publisher :
Science Press, 2023.

Abstract

The specific surface area and surface hydrophilicity of metal-organic frameworks can be tailored by changing their central metal ions and organic ligands. In this study, the surface of the metal-organic framework MIL-101(Cr) was modified in an aqueous solution of tetrahydropyran via the radiolytic method. A large number of hydroxyl groups were introduced to the surface of MIL-101(Cr), thereby effectively improving its surface hydrophilicity and substantially increasing its specific surface area without changing its central metal ion and organic ligand. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy demonstrated that the irradiation products of tetrahydropyran were bound to the surface of MIL-101(Cr) through covalent bonding. X-ray diffractometry demonstrated that the crystal structure of the material was retained after irradiation. The specific surface area of MIL-101(Cr) significantly increased, and water contact angle tests indicated that the surface changed from hydrophobic to hydrophilic after modification. These results show that the irradiation reaction of MIL-101(Cr) with tetrahydropyran significantly improves its specific surface area and hydrophilicity. This study provides guidance on the application of the irradiation method to prepare metal-organic frameworks with various properties by simple and rapid modification.

Details

Language :
Chinese
ISSN :
10003436
Volume :
41
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Fushe yanjiu yu fushe gongyi xuebao
Publication Type :
Academic Journal
Accession number :
edsdoj.5c8bb7ffd46e4ce796dd69f8516ab482
Document Type :
article
Full Text :
https://doi.org/10.11889/j.1000-3436.2022-0098&lang=zh