Superhydrophobic acid-resistant fluorinated Zif-8 prepared at normal temperature and pressure

被引:0
|
作者
Xia, Xinzhao [1 ]
Liu, Jiale [2 ]
Xiao, Yixian [2 ]
Yu, Yinuo [2 ]
Ren, Yunxiao [2 ]
Chen, Jiajun [3 ]
Xie, Wenting [2 ]
Yang, Bo [2 ]
Zhang, Jianying [3 ]
Yang, Zhou [1 ]
Hu, Wei [2 ]
Yang, Huai [3 ]
机构
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing Adv Innovat Ctr Mat Genome Engn, Beijing 100083, Peoples R China
[3] Peking Univ, Sch Mat Sci & Engn, Beijing 100871, Peoples R China
基金
中国国家自然科学基金;
关键词
ZIF-8; Fluorinated; Superhydrophobic; Acid resistance; Oil-water separation; STABILITY; MEMBRANE; SIZE;
D O I
10.1016/j.cej.2025.159223
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
ZIF-8 has a wide range of potential applications, including gas adsorption and storage, molecular separation, chemical sensing, catalysis, and water purification, however, its low stability in acidic environments limits its practical application. Here, a fluorinated ZIF-8 at normal temperature and pressure was synthesized by using hybrid organic ligands, the obtained fluorinated ZIF-8 has high superhydrophobic and acid-resistant properties. A well-designed fluorinated ligand (FL) has trifluoromethyl, triazol and phenolic hydroxyl groups in the molecular structure, which are responsible for hydrophobic character, coordination site and further modifiable site, respectively. With increasing the hybrid ratio of FL, the water contact angle (WCA) of fluorinated ZIF-8 significantly increases. After further post-synthetic functionalization with heptafluorobutyric anhydride, the 20 mol% FL hybrid ZIF-8 (ZIF-8-20 %FL-7F) maintained its inherent high porosity and adsorption capacity, while exhibiting superhydrophobicity and acid resistance. It was loaded on a PP membrane to prepare a ZIF-8-20 %FL7F@PP composite membrane, which can steadily achieve high-efficiency oil-water separation under acidic conditions with pH 2. This work demonstrates a universal and promising strategy to enhance the availability of the framework material in extreme environments.
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页数:10
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