PREPARATION OF TEMPO-CELLULOSE NANOFIBER/ZINC OXIDE AS ANTIMICROBIAL AND METHYLENE BLUE PHOTO-DEGRADING NANOCOMPOSITE
| Autor: | Hazem Hassan, Ahmed K. El-Ziaty, Mohamed El-Sakhawy, Ahmed Salama |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Nanocomposite
Organic Chemistry chemistry.chemical_element 02 engineering and technology Zinc 010402 general chemistry 021001 nanoscience & nanotechnology Antimicrobial behavioral disciplines and activities 01 natural sciences humanities 0104 chemical sciences chemistry.chemical_compound chemistry Nanofiber Materials Chemistry Cellulose 0210 nano-technology Methylene blue Nuclear chemistry |
| Zdroj: | Cellulose Chemistry and Technology. 55:365-373 |
| ISSN: | 2457-9459 0576-9787 |
| Popis: | "Photo-catalytic degradation of organic dyes in aquatic environments under visible light irradiation affords an efficient and economic technique for environmental remediation. TEMPO-oxidized cellulose nanofibers/zinc oxide nanocomposite (TEMPO-CNF/ZnO) was prepared through oxidation of cellulose pulp, followed by zinc oxide precipitation in the presence of oxidized fibers. TEMPO-CNF/ZnO was characterized by different techniques. The degradation rate of methylene blue (MB) by TEMPO-CNF/ZnO was gradually increased with increasing pH and the degradation reached 86% within 340 minutes at pH 7. The kinetic study showed that the pseudo-first-order kinetic best fitted the photo-catalytic process. A mechanism was proposed for the degradation of MB using TEMPO-CNF/ZnO under visible light irradiation. TEMPO-CNF/ZnO showed high antibacterial activity against S. aureus and E. coli. Thus, the TEMPO-CNF/ZnO nanocomposite has been demonstrated to be an effective photo-catalytic material for degrading MB under visible light irradiation." |
| Databáze: | OpenAIRE |
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