Indian Journal of Engineering & Materials Sciences

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Experimental Study of the Photocatalytic Behaviour of Zinc Oxide Nanostructure for Cationic Dye (Malachite Green)


Affiliations
1 Research Lab for Energy Systems, Department of Physics, Netaji Subhas University of Technology, New Delhi 110 078, India
 

In the present study, ZnO nanostructures formed by co-precipitation have been investigated for their photocatalytic behaviour against the cationic dye (Malachite Green). X-ray diffraction (XRD) technique has been used to identify the structure, crystallite size, and phase of the as-synthesized material. Surface morphology and elemental compositional analysis of the ZnO have been carried out using a scanning electron microscope (SEM) attached with an energy-dispersive spectrometer (EDS). The SEM study has revealed the formation of round-shaped pebble-like particles having sizes between 50 to 150 nm and found to be uniformly distributed. XRD analysis has shown well-resolved peaks of ZnO, indicating a polycrystalline nature with a hexagonal structure. The crystallite size has been calculated and found to be about 18 nm. Absorbance spectra have been recorded using a UV-Vis spectrometer and the optical band gap energy has been found to be 3.29 eV. Band-gap excitonic emission displays emission peaks in the photoluminescence spectrum at 390 nm. The results have shown the degradation of Malachite Green dye using ZnO nanoparticles in 3 hours, with 95% efficiency. The decomposition of the dye with ZnO nanoparticles can be utilized in industrial wastewater treatment for the benefit of mankind and the aquatic ecosystem, including their habitats.

Keywords

ZnO, Cationic dye, Degradation, Nanoparticles.
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  • Experimental Study of the Photocatalytic Behaviour of Zinc Oxide Nanostructure for Cationic Dye (Malachite Green)

Abstract Views: 46  |  PDF Views: 32

Authors

Anju
Research Lab for Energy Systems, Department of Physics, Netaji Subhas University of Technology, New Delhi 110 078, India
Ranjana Jha
Research Lab for Energy Systems, Department of Physics, Netaji Subhas University of Technology, New Delhi 110 078, India
Sukhvir Singh
Research Lab for Energy Systems, Department of Physics, Netaji Subhas University of Technology, New Delhi 110 078, India

Abstract


In the present study, ZnO nanostructures formed by co-precipitation have been investigated for their photocatalytic behaviour against the cationic dye (Malachite Green). X-ray diffraction (XRD) technique has been used to identify the structure, crystallite size, and phase of the as-synthesized material. Surface morphology and elemental compositional analysis of the ZnO have been carried out using a scanning electron microscope (SEM) attached with an energy-dispersive spectrometer (EDS). The SEM study has revealed the formation of round-shaped pebble-like particles having sizes between 50 to 150 nm and found to be uniformly distributed. XRD analysis has shown well-resolved peaks of ZnO, indicating a polycrystalline nature with a hexagonal structure. The crystallite size has been calculated and found to be about 18 nm. Absorbance spectra have been recorded using a UV-Vis spectrometer and the optical band gap energy has been found to be 3.29 eV. Band-gap excitonic emission displays emission peaks in the photoluminescence spectrum at 390 nm. The results have shown the degradation of Malachite Green dye using ZnO nanoparticles in 3 hours, with 95% efficiency. The decomposition of the dye with ZnO nanoparticles can be utilized in industrial wastewater treatment for the benefit of mankind and the aquatic ecosystem, including their habitats.

Keywords


ZnO, Cationic dye, Degradation, Nanoparticles.

References