Efficient solar heterogeneous photocatalytic degradation of metronidazole using heterojunction semiconductors hybrid nanocomposite, layered double hydroxides
| Autor: | Farid Aoudjit, Lamine Aoudjit, Fouzia Touahra, Djamilla Halliche, O. Cherifi |
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| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
Materials science Oxide 02 engineering and technology 010501 environmental sciences engineering.material 01 natural sciences Catalysis Nanocomposites law.invention chemistry.chemical_compound law Metronidazole Hydroxides Calcination Fourier transform infrared spectroscopy 0105 earth and related environmental sciences Water Science and Technology Nanocomposite Layered double hydroxides Heterojunction 021001 nanoscience & nanotechnology Semiconductors chemistry Chemical engineering Microscopy Electron Scanning engineering Photocatalysis 0210 nano-technology |
| Zdroj: | Water Science and Technology. 82:2837-2846 |
| ISSN: | 1996-9732 0273-1223 |
| DOI: | 10.2166/wst.2020.519 |
| Popis: | This study focuses on the synthesis of various nanocomposites with heterojunction structures, MgAl-LDH (LDH = layered double hydroxides) hybrid with semiconductor such as MoO3 and CuO. These solids were synthesized by co-precipitation method at constant pH and have been characterized extensively using atomic absorption spectroscopy (AAS), X-ray diffraction (XRD), Fourier transform infrared (FTIR) and transmission electron microscopy-energy dispersive X-ray (TEM-EDX) methods. The catalytic activity of nanocomposites was tested in the photocatalytic degradation under solar irradiation of emerging pollutants as the pharmaceutical metronidazole (MNZ). The experimental parameters, including initial MNZ concentration, the nature of oxide incorporate in the photocatalyst, catalyst loading were explored. All the synthesized samples showed high photocatalytic performances; the highest photocatalysis efficiency was achieved with the photocatalyst dose 1.5 g/L and initial MNZ concentration of 10 mg/L at neutral pH. The photocatalytic experimental results were fitted very well to the Langmuir-Hinshelwood model. From the obtained results the calcined LDH/semiconductors could be efficient for the photocatalytic process under solar irradiation of pharmaceuticals and may contribute in environmental remediation. |
| Databáze: | OpenAIRE |
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