Ultrasound assisted synthesis of morphology tunable rGO:ZnO hybrid nanostructures and their optical and UV-A light driven photocatalysis
| Autor: | Pandiyarajan Thangaraj, Mangalaraja Ramalinga Viswanathan, Karthikeyan Balasubramanian, David Contreras, Héctor D. Mansilla, Selene Sepulveda-Guzman, Miguel A. Gracia-Pinilla |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Nanostructure Photoluminescence Biophysics Oxide Nanotechnology 02 engineering and technology 010402 general chemistry 01 natural sciences Biochemistry law.invention symbols.namesake chemistry.chemical_compound law Thermal stability Photodegradation Graphene General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics 0104 chemical sciences chemistry symbols Photocatalysis 0210 nano-technology Raman spectroscopy |
| Zdroj: | Journal of Luminescence. 186:53-61 |
| ISSN: | 0022-2313 |
| DOI: | 10.1016/j.jlumin.2017.02.013 |
| Popis: | Controlling size and shape of hybrid nanostructures is technologically important because of the strong effect of nanostructure dimension and morphology on optoelectronic, biosensors and catalytic properties. Here, we have demonstrated a simple strategy for simultaneous control of morphology, defect engineering and photocatalytic activities of reduced graphene oxide:zinc oxide (rGO:ZnO) hybrid nanostructures which were prepared by using low frequency (42 kHz) ultrasound. By varying the solvents, the morphology of ZnO gradually evolved from spherical shape to a star like nature and the ZnO nanoparticles decorated on reduced graphene oxide were clearly observed in the TEM analysis. Absorption, photoluminescence, Raman and FTIR spectra clearly indicated the formation of rGO:ZnO hybrid nanostructures. Thermal analysis revealed that the hybrid nanostructures exhibited a good thermal stability. The synergistic integration of the unique morphology and size imparts the rGO:ZnO hybrid nanostructures with remarkably enhanced photocatalytic efficiency when compared with bare ZnO. The enhanced photocatalytic behaviour of the rGO:ZnO composite has been discussed in details herein. Simple and facile synthesis route demonstrated the potential for the utilization of rGO:ZnO hybrid nanostructures with unique properties for environmental engineering applications. |
| Databáze: | OpenAIRE |
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