Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9675683 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2005 | 9 Pages |
Abstract
ZnAl-layer double hydroxides (ZnAl-LDHs) with various Zn/Al ratios from 1:1 to 4:1 were prepared by the sol-gel method. The amount of ZnO in the layer double hydroxide was increased by the addition of more Zn hydroxide sol and Zn-oxide-hydroxide/2:1 ZnAl-LDH composites were prepared by heterocoagulation. The samples were calcinated at different temperatures (80-700 °C) and it was shown by XRD and TG measurements that the crystallinity of the samples improves as temperature is increased. The photocatalytic properties of the heat-treated samples were studied in a batch reactor with aqueous phenol solution as substrate. The samples prepared from ZnAl-LDH were shown to have higher photocatalytic efficiencies at 3:1 and 4:1 Zn/Al ratios in the case of mixed phase double hydroxide and ZnO crystals.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Colloid and Surface Chemistry
Authors
Ágnes Patzkó, Robert Kun, Viktória Hornok, Imre Dékány, Thomas Engelhardt, Norbert Schall,