研究目的
Investigating the structural, optical, and photocatalytic properties of zinc oxide nanoparticles obtained by simple plant extract mediated synthesis for potential application in waste water treatment.
研究成果
The study successfully demonstrates the green synthesis of ZnO nanoparticles with varying sizes and shapes using different plant extracts, which significantly influence their photocatalytic activity. The ZnO nanoparticles show superior photocatalytic efficiency in degrading methylene blue dye, suggesting their potential application in textile waste water treatment.
研究不足
The study is limited to the use of two specific plant extracts for the synthesis of ZnO nanoparticles and their photocatalytic activity against methylene blue dye. The scalability and practical application in industrial waste water treatment require further investigation.
1：Experimental Design and Method Selection
The study employs a green synthesis method using Achyranthes aspera and Couroupita guianensis leaf extracts as reducing agents and zinc nitrate as a precursor to prepare ZnO nanoparticles. The method is chosen for its economic, facile, and non-toxic byproduct advantages.
2：Sample Selection and Data Sources
Fresh leaves of Achyranthes aspera and Couroupita guianensis were collected from Tiruchengode region, Tamil Nadu, India. Zinc nitrate was procured from Merck, India, and used as the precursor material.
3：List of Experimental Equipment and Materials
PANanalytical X’Pert PRO powder X-ray diffractometer for XRD analysis,Bruker Tensor 27 Fourier transform infrared (FTIR) spectrometer for FTIR analysis,JSM JEOL-2100 transmission electron microscope (TEM) for morphological analysis,Varian Cary 5000 UV-Vis-NIR spectrophotometer for optical absorption spectrum,Shimadzu UV 1800 spectrophotometer for photocatalytic activity study
4：Experimental Procedures and Operational Workflow
The synthesis involves dissolving zinc nitrate in leaf extract, aging, centrifuging, drying, and calcining to obtain ZnO nanoparticles. Characterization includes XRD, FTIR, TEM, and UV-Vis analysis. Photocatalytic activity is assessed by degrading methylene blue dye under UV irradiation.
5：Data Analysis Methods
XRD data analyzed using Debye–Scherrer approximation for crystallite size. Optical absorption data used to calculate band gap. Photocatalytic efficiency calculated based on dye degradation.
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