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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F14%3A00209051" target="_blank" >RIV/68407700:21340/14:00209051 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S0025540813008349" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0025540813008349</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.materresbull.2013.10.005" target="_blank" >10.1016/j.materresbull.2013.10.005</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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-i

Název v anglickém jazyce

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

Popis výsledku anglicky

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-i

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CH - Jaderná a kvantová chemie, fotochemie

OECD FORD obor

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Projekt

<a href="/cs/project/VG20132015132" target="_blank" >VG20132015132: Využití nanotechnologií pro minimalizaci radionuklidové kontaminace životního prostředí</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Materials Research Bulletin

ISSN

0025-5408

e-ISSN

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Svazek periodika

49

Číslo periodika v rámci svazku

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Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

633-639

Kód UT WoS článku

000330081400098

EID výsledku v databázi Scopus

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