About: Indirect synthesis of Al2O3 via radiation- or photochemical formation of its hydrated precursors

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About: Indirect synthesis of Al2O3 via radiation- or photochemical formation of its hydrated precursors Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://www.sciencedirect.com/science/article/pii/S0025540813008349
Description	Gama-, theta- and alfa-modifications of aluminium oxide (alumina) were successfully prepared by calcination of precursor solid phase obtained by irradiation of clear aqueous solutions by UV light or electron beam. For the precipitate to form, formate anion must be present in the solution in sufficient concentration. According to X-ray diffraction, the precipitate was found to consist of either AlOOH or Al(OH)3, depending on the solution composition. The addition of hydrogen peroxide as a OH radical source and sensitizer markedly improved the efficiency of the preparation. Calcination of the dried precipitate at 500–800 °C produced highly porous gama-alumina with high specific surface area (ca. 150 m2/g). Samples were further investigated by means of scanning electron microscopy and specific surface area or porosity measurement. Possible applications of the material as sorbent or catalyst as well as a pure matrix for thermoluminescence dosimetry were briefly contemplated. Strong light-induced thermoluminescence was also observed in both gama- and alfa-Al2O3 samples at 300–400 °C. Gama-, theta- and alfa-modifications of aluminium oxide (alumina) were successfully prepared by calcination of precursor solid phase obtained by irradiation of clear aqueous solutions by UV light or electron beam. For the precipitate to form, formate anion must be present in the solution in sufficient concentration. According to X-ray diffraction, the precipitate was found to consist of either AlOOH or Al(OH)3, depending on the solution composition. The addition of hydrogen peroxide as a OH radical source and sensitizer markedly improved the efficiency of the preparation. Calcination of the dried precipitate at 500–800 °C produced highly porous gama-alumina with high specific surface area (ca. 150 m2/g). Samples were further investigated by means of scanning electron microscopy and specific surface area or porosity measurement. Possible applications of the material as sorbent or catalyst as well as a pure matrix for thermoluminescence dosimetry were briefly contemplated. Strong light-induced thermoluminescence was also observed in both gama- and alfa-Al2O3 samples at 300–400 °C. (en)
Title	Indirect synthesis of Al2O3 via radiation- or photochemical formation of its hydrated precursors Indirect synthesis of Al2O3 via radiation- or photochemical formation of its hydrated precursors (en)
skos:prefLabel	Indirect synthesis of Al2O3 via radiation- or photochemical formation of its hydrated precursors Indirect synthesis of Al2O3 via radiation- or photochemical formation of its hydrated precursors (en)
skos:notation	RIV/68407700:21340/14:00209051!RIV15-MV0-21340___
http://linked.open...avai/riv/aktivita	P S
http://linked.open...avai/riv/aktivity	P(VG20132015132), S
http://linked.open...iv/cisloPeriodika	0
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Čuba, Václav Pospíšil, Milan Bárta, Jan
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	České vysoké učení technické v Praze / Fakulta jaderná a fyzikálně inženýrská
http://linked.open...dnocenehoVysledku	21199
http://linked.open...ai/riv/idVysledku	RIV/68407700:21340/14:00209051
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	radiation; preparation; aluminium oxide; calcination; X-ray diffraction (en)
http://linked.open.../riv/klicoveSlovo	calcination aluminium oxide X-ray diffraction radiation preparation
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[56C3EC9E98E1]
http://linked.open...i/riv/nazevZdroje	Materials Research Bulletin
http://linked.open...in/vavai/riv/obor	CH
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Use of nanotechnology for minimization of radionuclide contamination of environment
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	49
http://linked.open...iv/tvurceVysledku	Bárta, Jan Pospíšil, Milan Čuba, Václav
http://linked.open...ain/vavai/riv/wos	000330081400098
issn	0025-5408
number of pages	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.materresbull.2013.10.005
http://localhost/t...ganizacniJednotka	21340

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