Synthesis and characterization of micrometer-sized silica aerogel nanoporous beads

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dc.contributor.author Sarawade, Pradip B.
dc.contributor.author Quang, Dang Viet
dc.contributor.author Hilonga, Askwar
dc.contributor.author Jeon, Sun Jeong
dc.contributor.author Kim, Hee Taik
dc.date.accessioned 2019-11-08T07:26:59Z
dc.date.available 2019-11-08T07:26:59Z
dc.date.issued 2012-08-15
dc.identifier.uri https://doi.org/10.1016/j.matlet.2012.04.110
dc.identifier.uri http://dspace.nm-aist.ac.tz/handle/123456789/515
dc.description Research Article published by Elsevier Volume 81, 15 August 2012 en_US
dc.description.abstract Here we report the preparation of micrometer-sized highly nanoporous, relatively trasperant silica aerogel beads with high surface area as well as large pore volume with sizes ranging from 165 to 395 μm. The wet micrometer-sized silica hydrogel beads were prepared through hydrolysis and polycondensation of sodium silicate as a silica precursor. A hydrophobic micro-silica aerogel nanoporous bead was synthesized by simultaneous solvent exchange surface modification process of as synthesized micron sized silica hydrogel bead at an ambient pressure. Hydrophilic micron-sized silica aerogel beads with relatively more textural properties (surface area, pore volume and pore size) with its counterpart were obtained by heating the synthesized hydrophobic micro-silica aerogel beads at 395 °C for an hour. This study demonstrates a robust approach to high porous hydrophobic and hydrophilic micro-silica aerogel beads with a myriad of potential applications in various fileds such as catalysis, biomolecule immobilization, chromatographic separation, and CO2 absorption. This proposed synthesis, which exploits a low-cost silica source (water-glass), is suitable for large-scale industrial production of highly porous hydrophobic and hydrophilic micro-silica aerogel beads at an ambient pressure. en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.subject Micro-silica aerogel bead en_US
dc.subject Ambient pressure drying en_US
dc.title Synthesis and characterization of micrometer-sized silica aerogel nanoporous beads en_US
dc.type Article en_US

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