期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 2, 期 48, 页码 20873-20881出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta04847d
关键词
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资金
- National Natural Science Foundation of China [51173202, 51203182]
- Hunan Provincial National Natural Science Foundation of China [13JJ4009]
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology [KL13-17]
- Key Laboratory of Renewable Energy, Chinese Academy of Sciences [y407k71001]
- Aid program for Science and Technology Innovative Research Team in Higher Educational Institutions of Hunan Province
- Aid Program for Innovative Group of National University of Defense Technology
Porous silicon carbide (SiC) has attracted considerable attention as an alternative catalyst support, particularly in corrosive and high-temperature environment. Herein, we report a facile strategy to controllably fabricate macroporous, meso-microporous and macro-meso-microporous SiC ultrathin fibers (M-SFs, MM-SFs and MMM-SFs, respectively) mats with good flexibility via electrospinning combined with polymer-derived ceramics route. The formation mechanism of different porous structures has been discussed. The MMM-SFs mat is found to exhibit simultaneously hydrophilic and lipophilic behaviors. Compared with M-SFs and MM-SFs, the MMM-SFs showed higher adsorption capacity, excellent adsorption durability and particularly faster adsorption rate (mass transport) in the adsorption experiments using methylene blue dye as a model. After being treated in dilute sulphuric acid for 5 h and subsequently heated at 800 degrees C for 1 h, the MMM-SFs retained their long-fiber shape and intact porous structure. Such a MMM-SFs mat may be of interest in high-temperature catalyst support, biosensor and biomedicine, energy storage, gas separation, particularly in harsh environment.
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