Journal
RSC ADVANCES
Volume 5, Issue 61, Pages 49287-49294Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra07421e
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Funding
- National Science Foundation (NSF) Single Investigator Award [DMR-1409105]
- Singapore Energy Innovation Programme Office for a National Research Foundation
- Swiss National Science Foundation
- NSF Materials Research Science and Engineering Centers (MRSEC) [DMR-1120296]
- National Institutes of Health/National Institute of General Medical Sciences under NSF [DMR-1332208]
- Center for Energy and Sustainability at Cornell University
- DOE [DE-FG02-11ER16210]
- NSF
- Cornell High Energy Synchrotron Source (CHESS)
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A one-pot synthesis approach is described to generate ordered mesoporous crystalline gamma-alumina-carbon composites and ordered mesoporous crystalline gamma-alumina materials via the combination of soft and hard-templating chemistries using block copolymers as soft structure-directing agents. Periodically ordered alumina hybrid mesostructures were generated by self-assembly of a poly(isoprene)-block-poly(styrene)-block-poly(ethylene oxide) terpolymer, n-butanol and aluminum tri-sec-butoxide derived sols in organic solvents. The triblock terpolymer was converted into a rigid carbon framework during thermal annealing under nitrogen to support and preserve the ordered mesoporous crystalline gamma-alumina-carbon composite structures up to 1200 degrees C. The carbon matrix was subsequently removed in a second heat treatment in air to obtain ordered mesoporous crystalline gamma-alumina structures. Such thermally stable, highly crystalline, and periodically ordered mesoporous ceramic and ceramic-carbon composite materials may be promising candidates for various high temperature catalysis, separation, and energy-related applications.
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