Crosslinked chitosan embedded TiO2 NPs and carbon dots-based nanocomposite: An excellent photocatalyst under sunlight irradiation
| Autor: | Raghunath Das, Sagar Pal, Arjun Maity, Abanindra Nath Sarkar, Lipi Midya |
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| Rok vydání: | 2020 |
| Předmět: |
0303 health sciences
Nanocomposite Materials science chemistry.chemical_element 02 engineering and technology General Medicine Carbon-13 NMR 021001 nanoscience & nanotechnology Biochemistry Chitosan 03 medical and health sciences chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Chemical engineering Structural Biology Photocatalysis Copolymer Degradation (geology) 0210 nano-technology Molecular Biology Carbon 030304 developmental biology |
| Zdroj: | International Journal of Biological Macromolecules. 164:3676-3686 |
| ISSN: | 0141-8130 |
| Popis: | Herein, a new hybrid nanocomposite, comprising of titania nanoparticles (TiO2 NPs) and carbon dots (CDs) deposited polyvinyl imidazole crosslinked chitosan [cl-Ch-p(VI)/TiO2NPs-CDs] has been developed. The nanocomposite has been synthesised by in-situ deposition of TiO2 NPs and CDs onto the surface of the copolymer under microwave irradiation. To the best of our knowledge, this in-situ approach has effectively been applied for the first time to fabricate green fluorescent CDs from sugar cane juice at moderate temperature (75 °C) under microwave irradiation. The developed nanocomposite has been characterized using UV–Vis spectroscopy, 13C NMR, XRD, HR-TEM, STEM and XPS analyses. The results suggest that the successful deposition of TiO2 NPs and CDs onto the surface of crosslinked chitosan is achieved. The experimental studies indicate that the NPs/CDs-impregnated nanocomposite allows efficient photocatalytic degradation of toxic organic compounds (~98.6% degradation of 2,4-dicholorophenol, ~95.8% degradation of Reactive Blue 4, ~98.2% degradation of Reactive Red 15) in the presence of sunlight. Finally, LC-MS analysis of the resultant degraded materials reveals the formation of organic molecules with lower molecular mass. |
| Databáze: | OpenAIRE |
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