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Formaldehyde controlling the synthesis of multishelled SiO2/Fe xO y hollow porous spheres
journal contribution
posted on 2018-07-17, 00:00 authored by Yunfei Chang, Yuze Li, Jingchuan Song, Miao Zhao, Jing Guo, Qingda An, Yumei Gong, Qipeng GuoA concise and facile sol-gel method to prepare multiple magnetic SiO2/Fe xO y hollow porous spheres was developed. A series of SiO2/Fe xO y hollow porous spheres consisting of single shell, yolk-shell, double shells, and triple shells could be obtained by simply adjusting the formaldehyde amount, as Fe(acac)3 was used as the shell-forming promoter. As the formaldehyde amount increases, the morphology of the as-prepared hollow spheres changed from single-shelled, yolk-shelled, double-shelled, to triple-shelled and then turned back. The spheres possess a large specific surface area (∼966 m2/g), uniform mesopores (∼4.5 nm), and large pore volume (1.37 cm3/g). Moreover, the yolk-shelled spheres have been successfully used in in situ adsorbing and reducing heavy metal ions in aqueous solution; the results suggested that it was an efficient adsorbent and convenient to concentrate from water.
History
Journal
LangmuirVolume
34Issue
28Pagination
8223 - 8229Publisher
ACS PublicationsLocation
Washington, D.C.Publisher DOI
eISSN
1520-5827Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2018, American Chemical SocietyUsage metrics
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