微型多孔材料
材料科学
化学工程
吸附
多孔性
静电纺丝
碳化硅
聚合物
催化作用
纳米纤维
复合材料
有机化学
化学
工程类
作者
Bing Wang,Yingde Wang,Yongpeng Lei,Nan Wu,Yanzi Gou,Cheng Han,Dong Fang
出处
期刊:Journal of materials chemistry. A, Materials for energy and sustainability
[The Royal Society of Chemistry]
日期:2014-10-23
卷期号:2 (48): 20873-20881
被引量:95
摘要
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 °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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