Photocatalytic degradation effect of malachite green and catalytic hydrogenation by UV–illuminated CeO 2 /CdO multilayered nanoplatelet arrays: Investigation of antifungal and antimicrobial activities
| Autor: | Malik Maaza, J. Judith Vijaya, C. Maria Magdalane, B. Jeyaraj, K. Kaviyarasu, C. Jayakumar |
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| Rok vydání: | 2017 |
| Předmět: |
Radiation
Materials science Nanocomposite Radiological and Ultrasound Technology Biophysics Oxide chemistry.chemical_element Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Nanomaterials chemistry.chemical_compound Cerium chemistry Chemical engineering Photocatalysis Radiology Nuclear Medicine and imaging Particle size Fourier transform infrared spectroscopy 0210 nano-technology Photodegradation |
| Zdroj: | Journal of Photochemistry and Photobiology B: Biology. 169:110-123 |
| ISSN: | 1011-1344 |
| DOI: | 10.1016/j.jphotobiol.2017.03.008 |
| Popis: | CeO2/CdO multi-layered nanoplatelet arrays have been synthesized by sol-gel method at two different temperatures using Citrus limonum fruit extract and the effect of particle size on the photocatalytic performance is studied. The particle size and phases was analysed by X-ray diffraction pattern (XRD) which brought out the formation of cubic phase in the synthesized samples. Field Emission Scanning electron microscopy (FESEM) revealed the surface morphology and made up of cumulative form of platelet shaped arrays with an average size of 10nm. The elemental composition and the purity of the nanomaterials were confirmed by Energy Dispersive X-ray spectroscopy (EDX). CeO2/CdO multilayered binary metal oxide nanoplatelet arrays were formed which was further explored with Fourier transform infrared spectroscopy (FTIR), it reveals that the nanocomposites contain CeO and CdO bonds. Determination of the direct and indirect bandgap energy of the nanoplatelet arrays was carried out by UV-Vis-DRS studies. In MG degradation, both the hole (h+) and hydroxyl radical (OH) played a major role than the superoxide radical (O2-). Possible photo degradation mechanisms are proposed and discussed in this article. CeO2/CdO multi-layered nanoplatelet arrays showed antibacterial activity and among the tested ones, it showed better growth inhibition towards P. aeruginosa MTCC73. Thus, this greener synthetic procedure was a highly effective method due to low-cost, highly effective UV light responsive material for environmental safety. |
| Databáze: | OpenAIRE |
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