|
Title
|
|
|
|
-containing layered double hydroxides as precursors for nano-sized photocatalysts
| |
|
Author
|
|
|
|
| |
|
Abstract
|
|
|
|
| Sn4+-containing LDH was prepared using the co-precipitation method at constant pH, and characterized using X-ray diffraction, UVvis diffuse reflectance spectroscopy and TG/DTG methods. The obtained product was further exposed to different thermal treatments in order to obtain nano-sized coupled ZnO/SnO2 systems with enhanced photocatalytic performances than the ones obtained by mixing the two semiconductor oxides. The formation of a well-defined ZnO/SnO2 system and the crystallite size, fully investigated using XRD, micro-Raman scattering and UVvis DR techniques, were found to be influenced by the nature of the precursors and the calcination temperature. The photocatalytic activity of the ZnO/SnO2 systems, evaluated for the photodegradation of methyl orange (MO) dye, was studied as a function of the initial pH, catalyst loading and the calcination temperature. The metal dispersion supplied by layered structures proved to be an advantage when preparing coupled ZnO/SnO2 systems, the photocatalytic activity being 2.3 times higher comparing with the physical mixtures performances. The maximum photocatalytic activity of the coupled ZnO/SnO2 system having a layered precursor was observed when using neutral pH, at a catalyst loading of 1 g/L calcined at 600 °C for 4 h. |
| |
|
Language
|
|
|
|
English
| |
|
Source (journal)
|
|
|
|
Applied catalysis : B : environmental. - Amsterdam
| |
|
Publication
|
|
|
|
Amsterdam
:
2008
| |
|
ISSN
|
|
|
|
0926-3373
| |
|
DOI
|
|
|
|
10.1016/J.APCATB.2008.06.006
| |
|
Volume/pages
|
|
|
|
84
:3/4
(2008)
, p. 699-705
| |
|
ISI
|
|
|
|
000261123600046
| |
|
Full text (Publisher's DOI)
|
|
|
|
| |
|
Full text (publisher's version - intranet only)
|
|
|
|
| |
|