Solar light induced rhodamine B degradation assisted by TiO2–Zn–Al LDH based photocatalysts
| Autor: | R. Marinkovic-Neducin, Tatjana Vulic, Milica Hadnadjev-Kostic |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Nanocomposite General Chemical Engineering Kinetics Layered double hydroxides Nanotechnology engineering.material Homogeneous distribution chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials Photocatalysis Rhodamine B engineering Fourier transform infrared spectroscopy Photodegradation |
| Zdroj: | Advanced Powder Technology. 25:1624-1633 |
| ISSN: | 0921-8831 |
| DOI: | 10.1016/j.apt.2014.05.015 |
| Popis: | A series of TiO 2 /Zn–Al layered double hydroxides (LDHs) based composites were synthesized and their photocatalytic efficiency in rhodamine B photodegradation reaction under solar light irradiation was tested. The aim of this study was to develop photocatalysts based on TiO 2 /Zn–Al layered double hydroxides that can be activated by solar light irradiation. The influence of TiO 2 doping (1, 2 and 3 mass%) on the photocatalytic properties of developed TiO 2 /Zn–Al LDHs nanocomposites was studied. Different photocatalytic behaviour of composites was interpreted in correlation to their structural, textural, morphological properties and kinetic parameters. All nanocomposites were active in the selected reaction. It was observed that the presence of Zn 2 TiO 4 coupled with the ZnO phase contributes to the activity provoked by solar light irradiation. The photodegradation follows the pseudo first-order kinetics in accordance with the Langmuir–Hinshelwood model. The kinetic study suggested that the applied synthesis methodology resulted in homogeneous distribution of TiO 2 and other active components on the photocatalyst surface leading to better accessibility of active sites. The developed synthesis method enables favourable interactions among active phases. Novel TiO 2 /LDH based photocatalysts are advantageous considering the low-cost and simple preparation, ensuring high photodegradation efficiency, making them appealing for the application in the field of water treatment. |
| Databáze: | OpenAIRE |
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