Green synthesis of hexagonal-shaped zinc oxide nanosheets using mucilage from flaxseed for removal of methylene blue from aqueous solution
| Autor: | Behrouz Elahi, Majid Darroudi, Vahid Javanbakht, Seyyed Mohammad Tabrizi Hafez Moghaddas |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Thermogravimetric analysis
Materials science Aqueous solution Absorption spectroscopy Infrared spectroscopy chemistry.chemical_element 02 engineering and technology Zinc 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.chemical_compound Ultraviolet visible spectroscopy chemistry Materials Chemistry Photocatalysis Physical and Theoretical Chemistry 0210 nano-technology Spectroscopy Methylene blue Nuclear chemistry |
| Zdroj: | Journal of Molecular Liquids. 296:111834 |
| ISSN: | 0167-7322 |
| DOI: | 10.1016/j.molliq.2019.111834 |
| Popis: | The main objective of this paper is the preparation of zinc oxide nanosheets using green synthesis method by flaxseed (Linnum usitatissimum) Mucilage. Synthesized nanosheets were characterized using Field Emission Scanning Electron Microscope, X-ray diffraction, Energy Dispersive X-ray Analysis, Fourier-transform infrared spectroscopy, Thermogravimetric Analysis, and UV–Visible methods and used in photocatalytic degradation of methylene blue in aqueous solution. The effect of photocatalyst used, process time and kinetic investigation, and photocatalyst regeneration was evaluated. The characterization results showed the presence of pure Zinc oxide nanosheets with uniform crystals and an average thickness of about 75 nm. UV spectroscopy study indicated that the photocatalytic absorption spectrum has extended to all ultraviolet and visible regions with good bond energy for dye degradation activity. Kinetic experiments of methylene blue degradation using nanosheets were indicative of a good agreement between Langmuir–Hinshelwood model and it was also seen that the photocatalyst could remove over 80% of methylene blue within 2 h. It was observed that use of flaxseed Mucilage makes a simple, eco-friendly and cost-effective method for the preparation of the zinc oxide nanosheets without using any stabilizer or surfactant agent. |
| Databáze: | OpenAIRE |
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