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个人信息Personal Information
教授
博士生导师
硕士生导师
性别：女
毕业院校：大连理工大学
学位：博士
所在单位：化工学院
学科：化学工艺. 能源化工. 工业催化
办公地点：大连市凌工路2号大连理工大学西部校区化工实验楼C331室
联系方式：0411-84986355
电子邮箱：wencuili@dlut.edu.cn
Switchable Transport Strategy to Deposit Active Fe/Fe3C Cores into Hollow Microporous Carbons for Efficient Chromium Removal
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论文类型：期刊论文
发表时间：2013-11-25
发表刊物：SMALL
收录刊物：SCIE、EI、PubMed、Scopus
卷号：9
期号：22
页面范围：3852-3857
ISSN号：1613-6810
关键字：carbon,chromium,core/shell materials,magnetic materials,microporous carbon,microporous materials
摘要：Magnetic hollow structures with microporous shell and highly dispersed active cores (Fe/Fe3C nanoparticles) are rationally designed and fabricated by solution-phase switchable transport of active iron species combined with a solid-state thermolysis technique, thus allowing selective encapsulation of functional Fe/Fe3C nanoparticles in the interior cavity. These engineered functional materials show high loading (approximate to 54 wt%) of Fe, excellent chromium removal capability (100 mg g(-1)), fast adsorption rate (8766 mL mg(-1) h(-1)), and easy magnetic separation property (63.25 emu g(-1)). During the adsorption process, the internal highly dispersed Fe/Fe3C nanoparticles supply a driving force for facilitating Cr-VI diffusion inward, thus improving the adsorption rate and the adsorption capacity. At the same time, the external microporous carbon shell can also efficiently trap guest Cr-VI ions and protect Fe/Fe3C nanoparticles from corrosion and subsequent leaching problems.