Počet záznamů: 1
Mineralogy of halloysites and their interaction with porphyrine
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SYSNO ASEP 0421827 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Mineralogy of halloysites and their interaction with porphyrine Tvůrce(i) Vašutová, V. (CZ)
Bezdička, Petr (UACH-T) SAI, RID, ORCID
Lang, Kamil (UACH-T) SAI, RID, ORCID
Hradil, David (UACH-T) RID, SAIZdroj.dok. Ceramics - Silikáty. - : University of Chemistry and Technology Prague - ISSN 0862-5468
Roč. 57, č. 3 (2013), s. 243-250Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova organoclays ; mineralogy ; porphyrine ; CEC Vědní obor RIV CA - Anorganická chemie Institucionální podpora UACH-T - RVO:61388980 UT WOS 000329004800011 EID SCOPUS 84892410569 Anotace Samples representing two modifications of halloysites, dehydrated (7 angstrom) and hydrated (10 angstrom) forms, respectively, were examined with the aim to select suitable candidates for to be used as carriers of porphyrine photoactive molecules. The samples were analysed by powder X-ray diffraction (pXRD), infrared spectroscopy (FT-IR), and high resolution transmission electron microscopy (HRTEM). Chemical composition was also determined. For the determination of cationic exchange capacity (CEC) the silver thiourea method (AgTU) was used. Silver cations concentrations in the solution before and after the interaction were determined by atomic absorption spectrometry (AAS). By the interaction of two pure hydrated halloysites with porphyrine it was found that porphyrine does not intercalate the interlayer space, but it is adsorbed on the outer surface of halloysite. This interaction changed the colour of clay sample from white to green. The changes were also clearly visible on diffuse reflectance spectra (DRS). Pracoviště Ústav anorganické chemie Kontakt Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Rok sběru 2014
Počet záznamů: 1