Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 352, Issue 2, Pages 244-251Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2010.09.016
Keywords
ZnS nanoparticles; Montmorillonite; Photoluminescence; Photocatalysis; Carbon dioxide
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Funding
- Ministry of Education Youth and Sport of the Czech Republic [MSM 6198910016, MSM 6198910019]
- Regional Materials Science and Technology Centre in Ostrava [CZ 1 05/2 1 00/01 0040]
- Academy of Sciences of the Czech Republic [AV0Z40320502]
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ZnS nanoparticles were prepared and deposited on montmorillonite (MMT) in the presence of cetyltri-methylammonium (CTA) UV spectrometry and transmission electron microscopy (TEM) proved the formation of nanoparticles with diameters ranging from 3 nm to 5 nm Selected area electron diffraction (SAED) patterns revealed the presence of romboedric ZnS The band gap energy of nanosize ZnS was estimated at 3 89 +/- 0 03 eV Photoluminescence spectra exhibited a strong emission band between 300 nm and 600 nm explained by the vacant ZnS nanostructure The prepared ZnS-montmorillonite nanocomposite (ZnS-MMT) was used for the photocatalytic reduction of CO(2) providing a considerably high efficiency that exceeded 5-6 fold the results of commercial TiO(2) Degussa P25 The main reaction products were hydrogen and methane Methanol and carbon oxide were also observed in about 7 fold lower amounts The stability of ZnS against oxidation was confirmed by the determination of sulphate using capillary isotachophoresis (C) 2010 Elsevier Inc All rights reserved
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