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ZnS/MMT nanocomposites: The effect of ZnS loading in MMT on the photocatalytic reduction of carbon dioxide
Authors: Koci Kamila | Matejova Lenka | Kozak Ondrej | Čapek Libor | Vales Vaclav | Reli Martin | Praus Petr | Safarova Klara | Kotarba Andrzej | Obalova Lucie
Year: 2014
Type of publication: článek v odborném periodiku
Name of source: Applied catalysis B: Enviromental
Publisher name: Elsevier Science BV
Place: Amsterdam
Page from-to: 410-417
Titles:
Language Name Abstract Keywords
cze ZnS/MMT nanokompozity: Efekt ZnS v MMT na fotokatalytickou redukci CO2 Odlišné množství nanočástic ZnS stabilizovaných pomocí CTAB bylo naprášeno na MMT, aby byl získán nanokompozit ZnS/MMT vhodný pro fotokatalytickou redukci CO2. ZnS nanočástice; MMT; nanokompozit; fotokatalýza; redukce CO2
eng ZnS/MMT nanocomposites: The effect of ZnS loading in MMT on the photocatalytic reduction of carbon dioxide Different weight loadings (2-4.2 wt.%) of ZnS nanoparticles stabilized by cetyltrimethylammonium bromide (CTAB) were deposited on montmorillonite (MMT) in order to investigate the performance of ZnS/MMT nanocomposites in the CO2 photocatalytic reduction. Physicochemical properties of prepared nanocomposites were comprehensively characterized by using nitrogen physisorption, XRD, TEM, DR UV-vis spectroscopy and contact potential difference measurements. The main reaction products in a gas phase were hydrogen and methane. According to the blank test the pristine montmorillonite did not possess any photocatalytic performance. The order in photo catalytic performance of individual ZnS/MMT nanocomposites in CO2 reduction depending on the ZnS loading was following: 3.1 wt.% ZnS > 4.2 wt.% ZnS > 2.0 wt.% ZnS. This trend was explained based on UV-vis, TEM and contact potential difference measurements as follows. The increasing loading of ZnS nanoparticles affects the degree of ZnS nanoparticles agglomeration on MMT and this agglomeration finally influences the properties/behavior within electronic structure of ZnS, correlating with the photocatalytic performance of ZnS/MMT nanocomposites in the CO2 reduction. ZnS nanoparticles; Montmorillonite (MMT); Nanocomposite; Photocatalysis; Work function

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