Synergistic Effects of Carbon Dots and Palladium Nanoparticles Enhance the Sonocatalytic Performance for Rhodamine B Degradation in the Absence of Light
| Autor: | Arif Hassan Dar, Abdul Selim, Govindasamy Jayamurugan, Shaifali Sartaliya, Sharanjeet Kaur |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Band gap General Chemical Engineering chemistry.chemical_element Nanoparticle Heterogeneous catalysis Photochemistry Article Catalysis chemistry.chemical_compound Reaction rate constant Rhodamine B Benzene QD1-999 chemistry.chemical_classification Palladium nanoparticles General Chemistry Polymer Chemistry Chemical engineering chemistry Polyamide Degradation (geology) Carbon Palladium Visible spectrum |
| Zdroj: | ACS Omega, Vol 5, Iss 35, Pp 22603-22613 (2020) ACS Omega |
| ISSN: | 2470-1343 |
| Popis: | Carbon dot (CD) and palladium nanoparticles (Pd NPs) composites are semiconducting materials having tremendous applications in catalysis with suitable bandgap. However, their combination with suitable polymer matrix in sono-photo-catalysis has not been explored. Herein, we have synthesized and characterized a new nano-hybrid catalyst from polyamide cross-linked CD-polymer and subsequent deposition of Pd NPs. Sonocatalytic activity of 99% rhodamine B dye-degradation was achieved in mere 5 minutes (min) under dark. Model catalyst replacing CD with benzene and other control studies revealed that synergistic effects of CD and Pd NPs enhances the sonocatalytic activity of nano-hybrid catalyst. Interestingly, visible light did not influence the activity significantly. While mechanistic investigations suggest that generation of reactive oxygen species on the surface of CD-polymer initiated by ultrasound which further facilitated by Pd NPs is the key for remarkable catalytic activity (rate constant 0.99 min-1). Recyclable heterogeneous catalyst under ambient conditions are promising for the utility of exploring sono-assisted dark-catalysis for several avenues. |
| Databáze: | OpenAIRE |
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