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https://hdl.handle.net/2440/75357
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dc.contributor.author | Chun, B. | - |
dc.contributor.author | Pendleton, P. | - |
dc.contributor.author | Badalyan, A. | - |
dc.contributor.author | Park, S. | - |
dc.date.issued | 2010 | - |
dc.identifier.citation | Korean Journal of Chemical Engineering, 2010; 27(3):983-990 | - |
dc.identifier.issn | 0256-1115 | - |
dc.identifier.issn | 1975-7220 | - |
dc.identifier.uri | http://hdl.handle.net/2440/75357 | - |
dc.description.abstract | Mesoporous silicas were synthesized from sodium silicate (Na₂Si₃O₇) and tetraethylorthosilicate (TEOS) with Pluronic F127 (polyethylene oxide-polypropylene oxide-polyethylene oxide, EO₁₀₆PO₇₀EO₁₀₆) triblock copolymer using sub- and supercritical carbon dioxide (SubCO₂ and SCO₂) respectively, as solvents. Templates were removed using liquid carbon dioxide (LCO₂) and SCO₂. The most efficient template removal was achieved by LCO₂ − 92.7% (w/w), followed by LCO₂ with ethanol entrainer − 85.6% (w/w), and by methanol − 78.8% (w/w). The best efficiency of template removal by SCO₂ was 50.7%. Values of specific surface areas, ABET, were increased by 10% with the increase of an ageing time from 6 to 24 hours for Na₂Si₃O₇-based silicas at aqueous synthesis conditions, whereas the use of SCO₂ reduced this value by 19.4%. For TEOS-based silicas synthesized using SCO₂, A BET values increased by 3.8 times. Application of SCO₂ for synthesis of TEOS-based silicas resulted in higher mesopore volumes of 0.719 and 1.241 mL/g with an average mesopore width varying from 3.4 to 3.9 nm. Although Na₂Si₃O₇-based silicas have almost similar mesopore width range, their mesopore volumes were 7 times less than those for TEOS-based silicas. Formation of mesopores in Na₂Si₃O₇- and TEOS-based silicas was at the expense of micropores when synthesized in SCO₂. | - |
dc.description.statementofresponsibility | Byung-Soo Chun, Phillip Pendleton, Alexander Badalyan, and Sun-Young Park | - |
dc.language.iso | en | - |
dc.publisher | Korean Inst Chem Engineers | - |
dc.rights | Copyright staus unknown | - |
dc.source.uri | http://dx.doi.org/10.1007/s11814-010-0130-x | - |
dc.subject | Mesoporous Silica Synthesis | - |
dc.subject | Mesopore Development | - |
dc.subject | Pluronic F127 Triblock Copolymer | - |
dc.subject | Liquid Carbon Dioxide Solvent | - |
dc.subject | Supercritical Carbon Dioxide Solvent | - |
dc.title | Mesoporous silica synthesis in sub- and supercritical carbon dioxide | - |
dc.type | Journal article | - |
dc.contributor.organisation | Institute for Mineral and Energy Resources | - |
dc.identifier.doi | 10.1007/s11814-010-0130-x | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Pendleton, P. [0000-0003-1031-8170] | - |
dc.identifier.orcid | Badalyan, A. [0000-0003-1130-6083] | - |
Appears in Collections: | Aurora harvest 4 Institute for Mineral and Energy Resources publications |
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