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- W2023352305 abstract "nSiO 2 @mSiO 2 and its thiol-functionalized counterpart can be conveniently patterned into films acting as filter for water purification; thus, removal of heavy metal ions can be achieved simply through percolation. ► A new method was designed to prepare core–shell structured continuously long mesoporous SiO 2 microfiber. ► Core–shell structured mesoporous SiO 2 fiber acts as adsorbent for removal of heavy metal ions from water, making the recycling process simpler. ► Entangling of long fiber increases the sorption possibility of heavy metal ions. ► Sorption capacity and efficiency of heavy metal ions are greatly enhanced through grafting of thiol groups. ► Film patterned from mesoporous SiO 2 fiber makes water purification much easier. In this paper, we report on a novel design strategy of an efficient sorbent for removal of trace contaminants from water. This kind of sorbent is composed of a nonporous core of SiO 2 nanofiber and a mesoporous shell (denoted as nSiO 2 @mSiO 2 (“n” means “nonporous” and “m” means “mesoporous”)). The nSiO 2 @mSiO 2 fiber possesses a continuously long fibrous shape and mesoporous micromorphology, thus, showing both high sorption capacity and separability. The flexible nonporous SiO 2 nanofiber was prepared with electrospinning first, followed by covering a mesoporous SiO 2 shell based on a modified Stöber method using CTAB (cetyltrimethylammonium bromide) as the directing agent for formation of the mesopores. Also, functional thiol groups were grafted on the nSiO 2 @mSiO 2 to enhance its performance. With a large specific surface area and long fibrous morphology, the nSiO 2 @mSiO 2 fiber and its thiol-functionalized counterpart exhibit impressive performance on removal of Pb 2+ and Cd 2+ from water. Furthermore, the flexible texture and fibrous morphology of the nSiO 2 @mSiO 2 fiber also made the removal of metal ions and the separation process more convenient and efficient, implying that the nSiO 2 @mSiO 2 fiber could have great potential for industrial applications." @default.
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- W2023352305 date "2011-06-01" @default.
- W2023352305 modified "2023-09-30" @default.
- W2023352305 title "Engineering and optimization of nano- and mesoporous silica fibers using sol–gel and electrospinning techniques for sorption of heavy metal ions" @default.
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- W2023352305 doi "https://doi.org/10.1016/j.jcis.2011.02.066" @default.
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