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Research Article
C Sridevi
Sri Sarada College for Women
Corresponding Author
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This work is licensed under a CC BY 4.0 License. Read Full License
Hexagonal phase zinc oxide nanostructures were synthesized via hydrothermal method and annealed at different temperatures viz., 200, 400, 600, 800 and 1000°C. The prepared nanostructures were characterized by XRD, FTIR, FESEM, HR-TEM and UV-DRS techniques. The annealing seems to have a profound effect on the crystallinity, morphology and properties of nanostructures. The lattice strain (ε) is calculated from Williamson-Hall (W-H) plot; for nanostructure with small crystallite size the strain is caused by compressive force (intercept is negative) whereas for the large crystallite size tensile force (intercept is positive) determines the lattice strain. The photocatalytic performances were studied by analyzing the degradation of methylene blue (MB) in an aqueous solution. ZnO annealed at 1000°C exhibited better photocatalytic activity due to enhanced crystallinity, comparatively lower bandgap and high oxygen vacancy. Thus, ZnO nanostructures prepared here provide a potential solution to general wastewater treatment and drinking water purification.
Keywords
Quasi sphere-like ZnO, Annealing temperature, Methylene blue dye, Hydrothermal method, Photocatalysts
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This is a preprint. It has not completed peer review.
Research Article
C Sridevi
Sri Sarada College for Women
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 17 Mar, 2021
No community comments so far
Subject Areas
Polymer Science
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Hexagonal phase zinc oxide nanostructures were synthesized via hydrothermal method and annealed at different temperatures viz., 200, 400, 600, 800 and 1000°C. The prepared nanostructures were characterized by XRD, FTIR, FESEM, HR-TEM and UV-DRS techniques. The annealing seems to have a profound effect on the crystallinity, morphology and properties of nanostructures. The lattice strain (ε) is calculated from Williamson-Hall (W-H) plot; for nanostructure with small crystallite size the strain is caused by compressive force (intercept is negative) whereas for the large crystallite size tensile force (intercept is positive) determines the lattice strain. The photocatalytic performances were studied by analyzing the degradation of methylene blue (MB) in an aqueous solution. ZnO annealed at 1000°C exhibited better photocatalytic activity due to enhanced crystallinity, comparatively lower bandgap and high oxygen vacancy. Thus, ZnO nanostructures prepared here provide a potential solution to general wastewater treatment and drinking water purification.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
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