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Engineering and optimization of nano- and mesoporous silica fibers using sol–gel and electrospinning techniques for sorption of heavy metal ions
- Source :
-
Journal of Colloid & Interface Science . Jun2011, Vol. 358 Issue 2, p547-553. 7p. - Publication Year :
- 2011
-
Abstract
- Abstract: 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 SiO2 nanofiber and a mesoporous shell (denoted as nSiO2@mSiO2 (“n” means “nonporous” and “m” means “mesoporous”)). The nSiO2@mSiO2 fiber possesses a continuously long fibrous shape and mesoporous micromorphology, thus, showing both high sorption capacity and separability. The flexible nonporous SiO2 nanofiber was prepared with electrospinning first, followed by covering a mesoporous SiO2 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 nSiO2@mSiO2 to enhance its performance. With a large specific surface area and long fibrous morphology, the nSiO2@mSiO2 fiber and its thiol-functionalized counterpart exhibit impressive performance on removal of Pb2+ and Cd2+ from water. Furthermore, the flexible texture and fibrous morphology of the nSiO2@mSiO2 fiber also made the removal of metal ions and the separation process more convenient and efficient, implying that the nSiO2@mSiO2 fiber could have great potential for industrial applications. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00219797
- Volume :
- 358
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Journal of Colloid & Interface Science
- Publication Type :
- Academic Journal
- Accession number :
- 60155190
- Full Text :
- https://doi.org/10.1016/j.jcis.2011.02.066