Comparative study of Co and Ni substituted ZnO nanoparticles: synthesis, structural, optical and photocatalytic activity
| Autor: | K. Vallalperuman, V. Thangaraj, P. SivaKarthik, S. Kumaresan |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Photoluminescence
Materials science Dopant Doping Mineralogy Nanoparticle chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry Photocatalysis Electrical and Electronic Engineering Fourier transform infrared spectroscopy 0210 nano-technology Cobalt Nuclear chemistry Wurtzite crystal structure |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 28:10582-10588 |
| ISSN: | 1573-482X 0957-4522 |
| Popis: | Herein we report, cobalt (Co) and nickel (Ni) doped zinc oxide (ZnO) nanoparticles by a novel microwave irradiation method for the first time. The role of dopants on modification of structural, morphological, optical and photocatalytic properties of ZnO nanoparticles has been investigated. Powder X-ray diffraction (XRD) results suggest that, both pure and doped ZnO samples showed hexagonal wurtzite type structure and average crystalline size was found to be 38, 31 and 22 nm for pure and Co, Ni doped ZnO respectively, this value in good agreement with the particle size calculated by TEM micrographs. UV–Vis transmission spectra indicate that decrease in the optical band gap (Eg) with doping of metal ions into the ZnO host lattice and increase the surface recombination rate. The photo catalytic activity of the nanoparticles studied in the degradation reaction of Crystal Violet (CV) and Methylene blue (MB) under UV light irradiation. Co–ZnO possesses excellent photocatalytic activity for the degradation of MB when compared to that of Ni–ZnO and ZnO. The possible photocatalytic mechanism was also discussed in detail. The samples were further characterized by photoluminescence spectra and Fourier Transform Infrared Spectra (FTIR) analysis. |
| Databáze: | OpenAIRE |
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