Synthesis and characterization of a narrow size distribution of zinc oxide nanoparticles (original) (raw)
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Fabrication of Zinc Oxide Nanoparticles by Chemical and Biological Methods
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In the current study, nanoparticles (NPs) of zinc oxide (ZnO) were prepared followed by determination of their characters among chemical and biological tools. In aqueous media from zinc acetate dihydrate and sodium hydroxide ZnONPs were fabricated by a precipitation method. To characterize the physicochemical properties of ZnO NPs transmission electron microscopy (TEM) and X-ray diffraction (XRD) were applied. The chemically fabricated ZnONPs (cZnO NPs) characterized with by crystalline structure with hexagonal structure of the wurtzite. The morphology of cZnO NPs was spherical with a primary size of 5-30 nm. Aqueous leaves extract of Ocimum sanctum was used for biological preparation, which may be more ecofriendly and economical compared to other commonly used methods. Results of XRD patterns confirmed the crystalline nature of biologically fabricated ZnONPs (bZnO NPs). Electron micrographs revealed that the resultant bZnO NPs characterized by a spherical shape and a particle size ...
Polymer precursor method for the synthesis of zinc oxide nanoparticles: A Novel Approach
Zinc oxide (ZnO) is a very important compound used in different industries. Several methods are currently used to synthesize ZnO. In this study, we discuss a novel chemical route used to synthesize and purify ZnO in the nanometer scale, with full control on the particle size. Zinc oxide nanoparticles have been synthesized using a simple chemical method using polymer precursors. The synthesized nanoparticles were characterized by X-ray Diffraction (XRD), Scanning electron microscope (SEM), Transmission electron microscope (SEM) and Fourier Transform Infrared spectroscopy (FTIR). The average crystallite size as measured from XRD and TEM image confirmed the particle size in the range of 30-50 nm. The SEM image was used to confirm the uniform spherical particles of zinc oxide nanoparticles.
SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF ZnO NANOPARTICLES
Herald of Khmelnytskyi National University. Technical sciences
In the present work, zinc oxide (ZnO) nanoparticles were synthesized by direct precipitation method in aqueous solution using zinc acetate dihydrate and sodium hydroxide as precursors. The molar ratio of Zn2+ to OH– was 1:2. The obtained precipitated compound was treated at different temperatures. The crystal phase and structural parameters of each prepared ZnO samples such as interplanar spacing, crystallite size, dislocation density, micro strain were determined by X-ray diffraction (XRD) analysis for different crystallographic planes. Other crystallite parameters such as lattice constants, unit cell volume, Zn–O bond length, crystallinity of synthesized ZnO samples also were calculated from the XRD data. The XRD patterns show the successfully synthetized ZnO phase with wurtzite hexagonal structure and average crystallite sizes of 24.6 nm, 25.6 nm and 28.1 nm for the samples that dried at room temperature without heat treatment (S1), dried at 60°C without calcination (S2), dried a...
Organic sol-gel method in the synthesis and characterization of zinc oxide nanoparticles
Nanosized Zinc Oxide (ZnO) was synthesized using sol-gel method. The nanomaterials with structure were annealed at different temperatures ranging from 500 to 700°C which were chosen based on the Thermogravimetric (TGA) Analysis. The structure and morphology were characterized by Powder X-Ray Diffraction (PXRD) and Transmission Electron Microscope (TEM), respectively. The PXRD shows the increasing tendency in crystallite size when the annealing temperature increases and the hexagonal structure of ZnO. TEM further revealed the same tendency which the Zn NPs size increased with the annealing temperature.
SYNTHESIS OF ZINC OXIDE NANOPARTICLES BY PRECIPITATION METHOD AND SIMPLE HEATING METHOD
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In this work, zinc oxide nanoparticles were readily synthesized through sol-gel method using zinc acetate as a precursor. The crystalline structure, morphology of synthesized ZnO nanoparticles were observed using powder X-ray diffraction (XRD), FTIR analysis, scanning electron microscopy (SEM) and their optical properties characterized using UV-visible spectroscopy.XRD results revealed that the prepared ZnO sample is highly crystalline, having wurtzite crystalstructure. FT-IR spectra peak at 417.52 cm-1 indicated characteristic absorption bands OF ZnO nanoparticles. UV-Vis absorption spectrum showed a typical spectrum for ZnO nanoparticles. The SEM image shows that ZnO nanoparticles prepared in this study are spherical in shape with smooth surface.
In this study, an industrial method will be provided for the synthesis of zinc oxide (ZnO) nanoparticles. In addition, the properties of synthesized nanoparticles will be described and appropriate applications for these nanoparticles will be proposed. ZnO nanoparticles were synthesized continuously via Spray Pyrolysis method. Scanning electron microscopy (SEM) images demonstrated that ZnO nanoparticles have a size of about 70 nanometers. Moreover, dynamic light scattering (DLS) analysis indicated uniform distribution of particles sizes. The presence of ZnO functional groups were confirmed by FTIR analysis. The effect of nanoparticles on performance of polymeric materials was evaluated. Overally, this research proposes that the application of nanoparticles can develop and enhance the usability of polymeric materials especially nanocomposite membranes.
Synthesis of zinc oxide nanoparticles
3RD INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC-2019)
Herein, Zinc oxide (ZnO) nanoparticles have been synthesized by precipitation method using Zinc nitrate hexahydrate precursor. To study its properties like shape and size, the synthesised nanopowder was examined via X-ray diffraction (XRD) and scanning electron microscopy (SEM). The average crystallite size calculated from the XRD data was found to be 18 nm. SEM image shows agglomerated nanoparticles which may be formed during the precipitation.
Zinc Oxide Nanoparticles Synthesis Methods and its Effect on Morphology: A Review
Biointerface Research in Applied Chemistry, 2021
Zinc oxide is an important material with numerous applications due to its unique properties. Due to their thermal and chemical stability are used in wide applications such as LEDs, sensors, catalysts, and photodetectors. Different chemical, physical, and biological methods have been adopted to achieve the intended result, as enumerated in many pieces of literature. Therefore, selecting an efficient synthesis process is essential, which is a key factor that significantly influences the efficacy of the synthesized nanocrystalline materials. The chemical synthesis of nanoparticles (NPs) via hydrothermal, solvothermal, and sol-gel routes is considered effective as high-quality crystalline structures are produced. Control of parameters of processes yields excellent morphological features of the synthesized samples. This review explored the different parameters of processes and their effect on the morphology of ZnO nanostructures via hydrothermal, solvothermal, and sol-gel techniques. Fin...
Synthesis of Zinc Oxide Nanoparticle by Sol-Gel Method and Study its Characterization
International Journal for Research in Applied Science and Engineering Technology, 2020
Now a day the more interesting and attracting point in research area is synthesis of nanoparticles with specific properties. Due to unique properties of oxide of nanoparticles achieve great attention in research areas. It is widely used as solar energy conversion, catalysis, varistors, gas sensors, non linear optics etc. ZnO nanostructures obtained a great attention in the research area because ZnO has large band gap. There are many different methods for synthesis of ZnO nanoparticles such as sol-gel method, chemical vapor decomposition, thermal decomposition, hydrothermal method etc. Among this method sol-gel method is the best for the preparation of ZnO nanoparticle. Fabrication of nanomaterial by sol gel method is simple and also its have advantage to control the size of material and morphology study of the material. The main objective of this paper is synthesis of ZnO nanoparticle by sol-gel method and studies its characterization. In this zinc acetate used as precursor, methanol as solvent, NaOH used as medium. The obtained ZnO nanoparticles are homogeneous and consistent in size corresponds to the XRD result that exhibit good crystallinity .ZnO nanoparticles are successfully synthesized by sol gel method. The obtained ZnO nanoparticles are characterized by XRD, SEM, and UV-visible