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Statements

Subject Item
n2:RIV%2F61989100%3A27730%2F13%3A86088404%21RIV14-GA0-27730___
rdf:type
skos:Concept n16:Vysledek
dcterms:description
ZnS nanoparticles stabilized by cetyltrimethylammonium bromide (CTAB) were deposited on montmorillonite (MMT) forming a ZnS–CTA–MMT nanocomposite. The nanocomposite was characterized by scanning electron microscopy (SEM), Fourier transformed infrared (FTIR) and UV diffuse reflectance spectra (DRS) spectrometry, X-ray powder diffraction (XRD) and specific surface area measurements. Thereafter, it was used for photocatalytic reactions under UV irradiation (Hg lamp) in three different reaction media with different pH: NaOH solution, HCl solution and water. Prior to the photocatalytic reactions the dispersions were saturated by carbon dioxide to buffer the systems. The main reaction products in gas phase determined by gas chromatography were hydrogen and methane. The reactions were monitored by measuring oxidation–reduction potentials. The highest yields of hydrogen were obtained in the dispersion acidified by HCl but the concentrations of methane were similar in all tested media. Hydrogen was supposed to be formed by the reaction of two hydrogen radicals. Methane was formed by the reduction of carbon dioxide and by the partial decomposition of CTAB. ZnS nanoparticles stabilized by cetyltrimethylammonium bromide (CTAB) were deposited on montmorillonite (MMT) forming a ZnS–CTA–MMT nanocomposite. The nanocomposite was characterized by scanning electron microscopy (SEM), Fourier transformed infrared (FTIR) and UV diffuse reflectance spectra (DRS) spectrometry, X-ray powder diffraction (XRD) and specific surface area measurements. Thereafter, it was used for photocatalytic reactions under UV irradiation (Hg lamp) in three different reaction media with different pH: NaOH solution, HCl solution and water. Prior to the photocatalytic reactions the dispersions were saturated by carbon dioxide to buffer the systems. The main reaction products in gas phase determined by gas chromatography were hydrogen and methane. The reactions were monitored by measuring oxidation–reduction potentials. The highest yields of hydrogen were obtained in the dispersion acidified by HCl but the concentrations of methane were similar in all tested media. Hydrogen was supposed to be formed by the reaction of two hydrogen radicals. Methane was formed by the reduction of carbon dioxide and by the partial decomposition of CTAB.
dcterms:title
Photocatalytic reactions of nanocomposite of ZnS nanoparticles and montmorillonite Photocatalytic reactions of nanocomposite of ZnS nanoparticles and montmorillonite
skos:prefLabel
Photocatalytic reactions of nanocomposite of ZnS nanoparticles and montmorillonite Photocatalytic reactions of nanocomposite of ZnS nanoparticles and montmorillonite
skos:notation
RIV/61989100:27730/13:86088404!RIV14-GA0-27730___
n16:predkladatel
n17:orjk%3A27730
n3:aktivita
n15:P
n3:aktivity
P(ED0040/01/01), P(ED2.1.00/03.0069), P(GAP107/11/1918)
n3:cisloPeriodika
15 June
n3:dodaniDat
n13:2014
n3:domaciTvurceVysledku
n9:5169348 n9:3453928
n3:druhVysledku
n12:J
n3:duvernostUdaju
n11:S
n3:entitaPredkladatele
n18:predkladatel
n3:idSjednocenehoVysledku
96081
n3:idVysledku
RIV/61989100:27730/13:86088404
n3:jazykVysledku
n20:eng
n3:klicovaSlova
ZnS nanoparticles, Nanocomposite, Montmorillonite, Photocatalysis
n3:klicoveSlovo
n6:ZnS%20nanoparticles n6:Montmorillonite n6:Nanocomposite n6:Photocatalysis
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[6769389A0AE8]
n3:nazevZdroje
Applied Surface Science
n3:obor
n7:JI
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
4
n3:projekt
n4:ED2.1.00%2F03.0069 n4:ED0040%2F01%2F01 n4:GAP107%2F11%2F1918
n3:rokUplatneniVysledku
n13:2013
n3:svazekPeriodika
275
n3:tvurceVysledku
Reli, Martin Praus, Petr Obalová, Lucie Kočí, Kamila
n3:wos
000318977300057
s:issn
0169-4332
s:numberOfPages
5
n19:doi
10.1016/j.apsusc.2012.11.155
n14:organizacniJednotka
27730