The Influence of Annealing Temperature on Structural Properties of Zinc Oxide Nanoparticles Synthesized by Precipitation Method

2017 ◽  
Vol 728 ◽  
pp. 215-220 ◽  
Author(s):  
Natpasit Chaithanatkun ◽  
Korakot Onlaor ◽  
Benchapol Tunhoo
Keyword(s):  
Zinc Oxide ◽  
Crystallite Size ◽  
Zinc Oxide Nanoparticles ◽  
Annealing Temperature ◽  
Average Crystallite Size ◽  
Zinc Nitrate ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction ◽  
Hexagonal Wurtzite Crystal Structure

In the present work, the precipitation method was applied to prepare zinc oxide nanoparticles in the presence of zinc nitrate and potassium hydroxide as precursor solutions. The influence of annealing temperature on the properties such as structural and morphological of zinc oxide nanoparticles were performed by X-ray diffraction technique, field-emission scanning electron microscopy, Fourier-transform infrared spectroscopy, and Raman spectroscopy. The effects of annealing temperature on the crystallite size of zinc oxide nanoparticles have investigated. The XRD results represented that the zinc oxide nanoparticles exhibits high crystallinity of hexagonal wurtzite crystal structure. The average crystallite size of nanoparticles increased from 18 to 31 nm when the annealing temperature had increased. The morphology images show that the nanoparticles in this work were spherical in shape. Raman and FT-IR spectra confirm that the quality of Zn-O vibrational mode is stronger at higher annealing temperature.

Synthesis, characterization, and pharmacological evaluation of zinc oxide nanoparticles formulation

2018 ◽  
Vol 34 (11) ◽  
pp. 753-763 ◽  
Author(s):  
Zulfia Hussain ◽  
Junaid Ali Khan ◽  
Hafeez Anwar ◽  
Naila Andleeb ◽  
Sehrish Murtaza ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Antimicrobial Properties ◽  
Average Crystallite Size ◽  
Precipitation Method ◽  
Control Group ◽  
Oxide Nanoparticles ◽  
In Vivo Evaluation ◽  
Pharmaceutical Industries

Zinc oxide nanoparticles (ZnONPs) are being used extensively in manufacturing skin lotions and food products and in various biological and pharmaceutical industries because of their immunomodulatory and antimicrobial properties. In this study, ZnONPs were synthesized by a precipitation method and characterized by X-ray diffraction (XRD) techniques, scanning electron microscopy (SEM), and ultraviolet–visible spectroscopy to investigate their structural, morphological, and optical properties. For in vivo evaluation, 40 healthy albino mice were randomly allocated to four equal groups among which the first one was the control group, while the second, third, and fourth were treated with carbon tetrachloride (CCl4), a blend of CCl4 and ZnONPs, and ZnONPs alone, respectively, for 21 days. The XRD analysis confirmed hexagonal wurtzite type structures having an average crystallite size of 41.54 nm. The morphology of ZnONPs analyzed through SEM showed uniform distribution of the grains and shape of the synthesized oxide. The energy band gap of the ZnONPs was found to be 3.498 eV. Hepatic and renal damage following CCl4 administration was apparent after 14 days and was increased at the 21st day, showing nodular fibrotic masses in the liver and bumpy surfaces in the kidney as observed by gross and histological examination. Coadministration of ZnONPs (15 mg/kg b.w. intragastrically 5 days a week) significantly prevented the CCl4-dependent increases in alanine transaminase, aspartate transaminase, creatinine, and urea levels, suggesting a protective potential of ZnONPs.

Thermodynamic and anticancer properties of inorganic zinc oxide nanoparticles synthesized through co-precipitation method

2021 ◽  
Vol 330 ◽  
pp. 115602
Author(s):  
Seyyed Vahid Mousazad Goorabjavari ◽  
Fateme Golmohamadi ◽  
Saba Haririmonfared ◽  
Hosein Ahmadi ◽  
Soheil Golisani ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
Anticancer Properties ◽  
Co Precipitation

New Epoxy Poly(dimethyl acrylamide) Polymer for the Dispersion of ZnO Nanoparticles

2020 ◽  
Vol 12 (10) ◽  
pp. 1231-1235
Author(s):  
V. Sorna Gowri ◽  
Raj Kumar Sen ◽  
Sunil Kumar Sanghi ◽  
Avanish Kumar Srivastava
Keyword(s):  
Zinc Oxide ◽  
Polymer Matrix ◽  
Zinc Oxide Nanoparticles ◽  
Thermo Gravimetric Analysis ◽  
Oxide Particle ◽  
Zinc Nitrate ◽  
Oxide Nanoparticles ◽  
Gravimetric Analysis ◽  
Good Thermal Stability ◽  
Copolymer Composites

A series of novel Zinc Oxide (ZnO) copolymer composites films with different Zinc Oxide concentration were prepared through incorporation of pre-made Zinc Oxide particle in to copolymer epoxy poly(dimethyl acrylamide). The copolymer epoxy poly(dimethyl acrylamide) was synthesized by free radical polymerization to disperse the Zinc Oxide nanoparticles. The Zinc Oxide nanoparticles with the diameter of 19 nm–35 nm were synthesized from zinc nitrate via a wet chemical method. The aim of the work is to develop a new method/process/material for the dispersion of Zinc Oxide nanoparticles and testing the performance of these composites films. Thermo gravimetric analysis show that Zinc Oxide nanoparticles were successfully incorporated into the polymer matrix and the Zinc Oxide copolymer composites have a good thermal stability. The micro structural analysis also show newly synthesized polymer disperse the nanoparticles well as evidenced by Scanning Electron Microscopy (SEM) analysis. The uniformly dispersed Zinc Oxide nanoparticle in the polymer matrix and the particles almost remained in their original shape and size even after incorporation in the polymer matrix. Fourier transform infrared spectroscopy (FT-IR) shift of the copolymer adsorbed Zinc Oxide nanoparticles confirmed that polymer molecules chain was anchored on the surface of the nanoparticles.

Preparation and Antibacterial Performances of Electrocatalytic Zinc Oxide Nanoparticles with Diverse Morphologies

2021 ◽  
Vol 17 (9) ◽  
pp. 1824-1829
Author(s):  
Junlin Li ◽  
Xiangfei Li ◽  
Dong Liang ◽  
Xiaojuan Zhang ◽  
Qing Lin ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Surface Area ◽  
Zinc Oxide Nanoparticles ◽  
Average Particle Size ◽  
Three Dimensional ◽  
Diffusion Method ◽  
Oxide Nanoparticles ◽  
Average Particle ◽  
X Ray Diffraction ◽  
Zno Nps

This study exploits the potential of zinc oxide nanoparticles (ZnO-NPs) with diverse morphologies as catalysts and antibacterial agent. Spherical ZnO-NPs, rod-shaped ZnO-NPs and flower-shaped ZnO-NPs were prepared by microemulsion method, solvent heat method and hydrothermal method, respectively. The structural characterizations of samples were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. XRD results revealed the formation of spherical ZnO-NPs, rod-shaped ZnO-NPs and flower-shaped ZnO-NPs were all wurtzite crystal structure. SEM results showed that spherical ZnO-NPs had an average particle size of 30–40 nm, rod-shaped ZnO-NPs were about 500 nm long and 100 nm wide with obvious hexagonal crystals. Flower-shaped ZnO-NPs had a three-dimensional appearance with obvious petals. Results of electrochemical HER (Hydrogen evolution reaction) experiments revealed that spherical ZnO-NPs exhibited the highest electrocatalytic activity at the lowest potential voltage due to their largest specific surface area. The antibacterial property of ZnO-NPs samples were studied by the optical density method and disc diffusion method. All samples had antibacterial effects against E. coli. and flower-shaped ZnO-NPs showed the best antibacterial activity due to the largest surface area in comparison with spherical ZnO-NPs and rod-shaped ZnO-NPs, which promised the maximum Zn2+ release as bactericide mechanism that registered in the case of different ZnO-NPs morphologies.

scholarly journals Bioactivities of Geranium wallichianum Leaf Extracts Conjugated with Zinc Oxide Nanoparticles

Biomolecules ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 38 ◽  
Author(s):  
Banzeer Ahsan Abbasi ◽  
Javed Iqbal ◽  
Riaz Ahmad ◽  
Layiq Zia ◽  
Sobia Kanwal ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Energy Dispersive ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction ◽  
Leaf Extracts ◽  
Tem Analysis ◽  
X Ray ◽  
Transmission Electron

This study attempts to obtain and test the bioactivities of leaf extracts from a medicinal plant, Geranium wallichianum (GW), when conjugated with zinc oxide nanoparticles (ZnONPs). The integrity of leaf extract-conjugated ZnONPs (GW-ZnONPs) was confirmed using various techniques, including Ultraviolet–visible spectroscopy, X-Ray Diffraction, Fourier Transform Infrared Spectroscopy, energy-dispersive spectra (EDS), scanning electron microscopy, transmission electron microscopy, and Raman spectroscopy. The size of ZnONPs was approximately 18 nm, which was determined by TEM analysis. Additionally, the energy-dispersive spectra (EDS) revealed that NPs have zinc in its pure form. Bioactivities of GW-ZnONPs including antimicrobial potentials, cytotoxicity, antioxidative capacities, inhibition potentials against α-amylase, and protein kinases, as well as biocompatibility were intensively tested and confirmed. Altogether, the results revealed that GW-ZnONPs are non-toxic, biocompatible, and have considerable potential in biological applications.

Biosynthesis of Zinc Oxide Nanoparticles Using Pongamia pinnata Plant Leaves Extract

2019 ◽  
pp. 43-46
Author(s):  
Sneha Sawade ◽  
Pramod Kulkarni
Keyword(s):  
Zinc Oxide ◽  
Aqueous Extract ◽  
Zinc Oxide Nanoparticles ◽  
Pongamia Pinnata ◽  
Oxide Nanoparticles ◽  
Capping Agent ◽  
Plant Leaves ◽  
X Ray Diffraction ◽  
X Ray ◽  
Average Size

We reported a simple, green and eco-friendly approach for the synthesis of zinc oxide nanoparticles using aqueous extract of Pongamia pinnata plant leaves acts as reducing agent as well as capping agent. Biosynthesized zinc oxide nanoparticles were characterized by FTIR, X-ray diffraction and field emission scanning electron microscopy. The results suggested that the zinc oxide nanoparticles synthesized by aqueous extract of Pongamia pinnata plant leaves with high purity, mostly spherical in shape with an average size of 23.5 nm.

LASER-INDUCED PHOTOLUMINESCENT STUDIES OF Al-DOPED ZINC OXIDE NANOPARTICLES

2010 ◽  
Vol 09 (05) ◽  
pp. 439-445
Author(s):  
DHIRAJ KUMAR ◽  
SUNIL KUMAR ◽  
H. S. BHATTI
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Nitrogen Laser ◽  
X Ray Diffraction ◽  
Electron Microscopic ◽  
Time Resolved ◽  
X Ray ◽  
Aluminum Ions ◽  
Transmission Electron

In this paper, addition of aluminum in zinc oxide is incorporated using low-temperature chemical synthesis route. Aluminum ions help in crystallization of zinc oxide nanoparticles. Characterization of the synthesized nanoparticles of zinc oxide has been done using Transmission electron microscope (TEM), and X-ray diffraction (XRD) analysis, Energy-resolved photoluminescence (PL) spectra and Time-resolved laser-induced photoluminescence (TRPL) at room temperature. Transmission electron microscopic observations and X-Ray diffraction studies indicate highly crystalline nature and particle size of the order of 20 nm in ZnO:Al . Time-resolved laser-induced photoluminescence measurements have been done using pulsed nitrogen laser as an excitation source, operated at wavelength 337.1 nm and having high peak output power of 1 MW. The results show that at higher concentrations of Al doping in host ZnO phosphor, emission intensity is more by several orders of magnitude and lifetime shortening indicates that these nanoparticles are more efficient as compared with lower concentrations of dopant.

Sign in / Sign up

Export Citation Format

Share Document