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Photoactivity of brookite-rutile TiO(2) nanocrystalline mixtures obtained by heat treatment of hydrothermally prepared brookite
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SYSNO ASEP 0372195 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Photoactivity of brookite-rutile TiO(2) nanocrystalline mixtures obtained by heat treatment of hydrothermally prepared brookite Tvůrce(i) Štengl, Václav (UACH-T) RID, ORCID, SAI
Králová, Daniela (UMCH-V)Zdroj.dok. Materials Chemistry and Physics. - : Elsevier - ISSN 0254-0584
Roč. 129, č. 3 (2011), s. 794-801Poč.str. 7 s. Jazyk dok. eng - angličtina Země vyd. CN - Čína Klíč. slova oxides ; heat treatment ; titania ; photocatalysis Vědní obor RIV CA - Anorganická chemie CEP GA203/08/0334 GA ČR - Grantová agentura ČR CEZ AV0Z40320502 - UACH-T (2005-2011) AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000294092500022 DOI 10.1016/j.matchemphys.2011.05.006 Anotace Pure brookite phase was prepared by hydrothermal synthesis of titanium peroxo-complex in the presence of glycolic acid at 220 degrees C. The structure of prepared brookite samples was determined by X-ray powder diffraction (XRD) and selected area electron diffraction (SAED). The prepared brookite was studied by in situ high temperature XRD in air. The morphology and microstructure characteristics were also obtained by transmission electron microscopy (TEM). The nitrogen adsorption-desorption was used for determination of surface area (BET) and porosity. The method of UV-vis diffuse reflectance spectroscopy was employed to estimate band-gap energies of prepared brookite. The photocatalytic activity of the prepared titania samples were assessed by photocatalytic decomposition of Orange II dye in an aqueous slurry under UV irradiation at 365 nm wavelength. The photocatalytic activity of the prepared sample brookite heated to 800 degrees C in air was higher than nanocrystalline unheated brookite powder. Pracoviště Ústav anorganické chemie Kontakt Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Rok sběru 2012
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