Characterization Of ZnO Nanoparticles Research Articles

Synthesis and Characterization of ZnO Nanoparticles by Pulsed Laser Ablation in Liquid Using Different Wavelengths for Antibacterial Application

In this paper, the synthesis of colloidal solution of ZnO nanoparticles by PLAL using an Nd: YAG laser with 1064 nm and 532 nm wavelengths is described. The optical, morphological, structural, wettability and antibacterial activities were studied. The XRD analysis showed the hexagonal wurtzite structure while the UV-vis indicated the blue shift of the absorption peak due to the surface plasmon of the nanoparticle, which showed significant changes in color behavior. The FE-SEM revealed a uniformed spherical shape with a partial size range of 20.50–21.48 nm for ZnO at 1064 and 57.08–59.87 nm for ZnO at 532nm. Also, the concentration measurement indicated that the concentration of ZnO prepared at 1064 nm is 26.7 μg ml-1 and 63 μg ml-1 at 532 nm due to the relevance of high energy to the Zn plate and little distortion in the water and high absorption of short wavelength. Finally, the optical density of the antibacterial activity has been investigated, and both concentrations have good antibacterial activity at 12 h. The ZnO prepared at 532 nm has higher antibacterial activity because it has a high concentration of nanoparticles for both S. aureus and E. coli. Finally, the cell viability for ZnO synthesis with both 1064 nm and 532 nm indicates that this material has high biocompatibility and could be used for medical applications.

Synthesis and Characterization of ZnO Nanoparticles and Their Application on Cotton Fabrics to Obtain Superhydrophobic Surfaces

حضرت جسيمات أوكسيد الزنك النانوية ZnO (NPs) بطريقة كيميائية رطبة عند درجتي حرارة مختلفتين (30-90) ̊C باستخدام كلوريد الزنك كبادئ في وسط مائي. تم توصيف جسيمات أوكسيد الزنك النانوي المحضر باستخدام المجهر الإلكتروني الماسح (SEM) ,حيود الأشعة السينية (XRD) ، وطيف الأشعة تحت الحمراء (FTIR) ، أشارت أنماط الأشعة السينية الى بنية سداسية (wurtizte) بمتوسط حجم بلوري (19.5-23nm) لجسيمات أوكسيد الزنك المحضرة عند درجتي الحرارة (30-90 ̊C)على التوالي. أظهرت صور المجهر الالكتروني الماسح أنه مع زيادة درجة الحرارة ، تغير شكل جسيمات أوكسيد الزنك النانوي من الأسلاك النانوية إلى االشكل الكروي . لتصنيع قماش قطني فائق المقاومة للماء. تم غمر القماش في محلول غروواني لأوكسيد الزنك بتركيز (1٪) ,ثم تعديله لاحقًا بحمض الشمع . تم توصيف القماش القطني المعالج باستخدام المجهر الإلكتروني الماسح (SEM) واختبار زاوية التماس (CA) .أظهرت نتائج المجهر الالكتروني الماسح أن جسيمات أوكسيد الزنك النانوي المحضر عند(90 ̊C) خلق خشونة على سطح القطن أفضل من جسيمات أكسيد الزنك النانوي المحضرعند (30 ̊C). أظهرت نتائج اختبار زاوية التماس CA خصائص فائقة الكره للماء لعينات أوكسيد الزنك النانوي المحضر عند(90 ̊C) ، بينما أظهرت عينات أوكسيد الزنك النانوي المحضر عند(30 ̊C) خصائص كارهة للماء فقط بعد التعديل بحمض الشمع. تم استخدام تراكيز مختلفة من حمض الشمع لجعل سطح أوكسيد الزنك كارهاً للماء. أظهرت نتائج زاوية التماس (CA) أن القماش القطني المعالج بأوكسيد الزنك النانوي المحضر عند الدرجة (90 ̊C) المعدل ب 1٪ وزناً من حمض الشمع أظهر سطحاً فائق الكره للماء بزاوية تماس (CA=154̊ ).

Green synthesis and characterization of ZnO nanoparticles using seaweed extract of Halimeda opuntia and their application in seed germination of maize

Green synthesis and characterization of ZnO nanoparticles using seaweed extract of Halimeda opuntia and their application in seed germination of maize

Synthesis, Characterization of ZnO-based Nanocomposites and its Effect on the Viscosity of Gasoline Engine Lubricating Oil

This study represents the synthesis, characterization of ZnO nanoparticles and encapsulated composites with MWCNT, sodium dodecyl sulfate (SDS) and cetyltrimethylammonium bromide (CTAB) for the lubricating performance in petrol engine oil. The facile sol-gel process was used to synthesize ZnO and ZnO-based nanocomposites followed by annealing at 500 ºC. ZnO-based nanocomposite samples were prepared by adding different secondary encapsulating agents such as MWCNT (with different wt.% of 1, 2 and 3), SDS and CTAB. The as-synthesized ZnO and ZnO-based nanocomposite samples were further dispersed in 20W40 grade engine oil separately by taking 50 mL volume of oil. Different amounts of the synthesized samples of 50 mg, 100 mg and 150 mg were blended with the lubricant accordingly by the sonication process. After that the viscosity performances were carried out for all the prepared samples. The dynamic and kinematic viscosity were measured using a redwood viscometer and the temperature varied throughout the analysis at 34, 44 and 55 ºC to observe the optimum temperature effect on viscosity performance. The objective of this work is to determine the temperature effects on the viscosity of commercial lubricant 20W40 grade by blending with different suspended novel nanomaterials.

Enhanced dye-sensitized solar cell performance and electrochemical capacitive behavior of bi-functional ZnO/NiO/Co3O4 ternary nanocomposite prepared by chemical co-precipitation method

Increasing prerequisites for sustainable energy storage and conversion technologies have necessitated the exploration of advanced materials with improved properties. Here, we present the synthesis and characterization of ZnO nanoparticles (NPs), ZnO/NiO, ZnO/Co3O4 and ZnO/NiO/Co3O4 NCs as promising bi-functional materials for dye-sensitized solar cell (DSSC) and electrochemical energy storage applications. A facile chemical co-precipitation approach was followed to synthesize pure ZnO NPs, ZnO/NiO, ZnO/Co3O4 and ZnO/NiO/Co3O4 NCs. The structural and morphological analyses revealed the successful integration of ZnO, NiO, and Co3O4 NPs and also the formation of well-defined core-shell and homogenous nanocomposite structures. The XRD and HRTEM analyses confirmed the crystalline nature and nanoscale morphology of synthesized materials, respectively. The photovoltaic performance of DSSC fabricated using ternary ZnO/NiO/Co3O4 NC photoanode showed optimum dye-loading and best solar to electrical energy conversion efficiency with Jsc of 11.29 mA cm−2 and ƞ of 4.66%, which was considerably higher than the DSSC fabricated using pure ZnO NPs photoanode (ƞ = 2.01%). The increment in photocurrent density (Jsc) could be ascribed to the perfect band alignment of NiO and Co3O4 NPs in the ternary NC. Further, the ZnO/NiO/Co3O4 NC photoanode integrated DSSC disclosed 97% retainment in energy conversion efficiency even after 10 days of operation. The electrochemical performance of supercapacitor fabricated using ternary ZnO/NiO/Co3O4 NC showed high specific capacitance of 534.7 Fg−1 at 1 Ag−1 with favourable rate ability (∼52% at 16 Ag−1), good cyclic stability (91.07%) and low internal resistance. Moreover, the ZnO/NiO/Co3O4 NC at a current density of 2 Ag−1 exhibited a significantly high capacitance value of 463.1 Fg−1, which was 1.93, 1.58 and 1.22 times greater than ZnO NPs, ZnO/Co3O4 NC and ZnO/NiO NC, respectively.

Phytofabrication and characterization of ZnO nanoparticles with Anagallis arvensis as promising eco-friendly insecticide against Tribolium castaneum Herbst

Tribolium castaneum Herbst (Coleoptera: Tenebrionidae) is a significant and economically detrimental pest that infests stored grains, particularly wheat, which serves as a staple food for a substantial portion of the Asian population. Environmental and health hazards of available chemical control options coupled with development of resistance against them warrants discovery of more sustainable and environment friendly pest control materials. This study aimed to investigate the physical properties and insecticidal efficacy of zinc oxide nanoparticles (ZnO NPs), fabricated with Anagallis arvensis extracts, against T. castaneum. The synthesized ZnO NPs were characterized using various analytical techniques. The UV–Visible spectrograph exhibited a characteristic peak at 320 nm at room temperature, while Fourier Transform Infrared Spectroscopy (FTIR) was employed to determine the organic constituents in NPs. Following that, the Scanning Electron Microscopy - Energy Dispersive X-ray (SEM-EDX) analyses were conducted to assess the shape, size, and weight of the nanoparticles. Dynamic Light Scattering (DLS) analysis provided information on their surface charge and hydrodynamic diameter. The mortality bioassay demonstrated that ZnO NPs exhibited a significant toxic effect against T. castaneum (p < 0.05), with mortality showing a direct correlation with the concentration and exposure time. The highest dose resulted in a mortality rate of 75 % at the end of the experiment, and the LC50 calculated through Probit-mortality analysis was 105.47 mg/L. Our findings suggest that ZnO NPs loaded with plant extracts hold exciting potential as effective grain protectants.

Green Synthesis and Characterization of ZnO Nanoparticles from the Extract of Tagetes erecta Leaves

Green Synthesis and Characterization of ZnO Nanoparticles from the Extract of Tagetes erecta Leaves

Utilization of Prunus serrulata leaf extract for the synthesis and characterization of ZnO nanoparticles

Using a green route for the synthesis of nanoparticles has become popular in recent years due to its easier, eco-friendly, faster and cheaper nature. This study explores the synthesis of ZnO nanoparticles utilizing, for the first time, Prunus serrulata (Japanese Cherry Blossom) leaf extract as both a reducing and capping agent. The characterization of the nanoparticles was performed by employing several instrumental techniques. The X-Ray Diffraction (XRD) method was utilized to identify the amorphous crystal structure of the ZnO nanoparticles. Scanning Electron Microscopy (SEM) and Scanning Transmission Electron Microscopy (STEM) were used to determine the homogenous and spherical geometry, having a size of 5–10 nm. X-Ray Photoelectron Spectroscopy (XPS) was used to observe the surface of the nanoparticles, which were present in the metal oxide form. Fourier Transform-Infrared spectroscopy (FT-IR) was also utilized to understand which types of organic groups are responsible for the stabilization of the nanoparticles.

Correction to: Synthesis and characterization of ZnO nanoparticles and their application in dye‑sensitized solar cells

Correction to: Synthesis and characterization of ZnO nanoparticles and their application in dye‑sensitized solar cells

Synthesis and characterization of ZnO nanoparticles and their application in dye-sensitized solar cells

Synthesis and characterization of ZnO nanoparticles and their application in dye-sensitized solar cells

Low-frequency ultrasound-assisted biosynthesis and characterization of ZnO nanoparticles using Bacillus thuringiensis against Tribolium castaneum(Coleoptera, Tenebrionidae)

Nanoparticle synthesis could be achieved using microorganisms and ecofriendly reducing and capping agents, which becomes one of more potential areas of research. In this paper, ZnO nanoparticles (ZnO NPs) was synthesized using Bacillus thuringiensis (Bt) assisted with Low-frequency ultrasound, then its physicochemical characteristics and insecticidal properties was investigated. Several factors such as synthesis time, temperature, the pH of reaction system showed significantly influence on Bt-ZnO NPs synthesis. The morphological and structural properties of NPs was analyzed by X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR),Scanning Electron Microscopy (SEM), Transmission Electron Microscope (TEM) and Zeta potential analyses. The physical characterization revealed that nature, negatively charged, and exhibited a hexagonal wurtzite structure with a mean size of about 25.24 nm. Bt-ZnO NPs showed higher insecticidal efficacy against Tribolium castaneum. Thus, this study clearly revealed the benefit of synthetic Bt-ZnO NPs used as bio-insecticide for pest control.

Bio synthesis, Characterization of ZnO Nanoparticles from Scoparia dulcis L. plant extract and its in-vitro Antioxidant, Acetylcholinesterase Activity

The current investigation is focused on the use of green synthesis methods for zinc oxide nanoparticles (ZnO NPs) from Scoparia dulcis L. extract (SDE). SDE-mediated ZnO NPs (SDE-ZnO-NPs) were made using a simple and eco-friendly method that required little reaction time and calcinations temperature. UV-Vis, FTIR, X-ray powder diffraction, SEM, TEM &amp; EDAX were used into characterizes the skeletal and synthetic properties concerning biosynthesized ZnO nonmaterial. The UV–Visible spectroscopy absorption peak for SDE-ZnO-NPs was found to be at 380 nm, confirming the production of ZnO NPs. The FTIR spectrum also revealed bioactive functional groups as well as metal-oxygen groups. Synthesized ZnO NPs had a rod shape in 200 nm, according to TEM examination. The Zn and O in the produced ZnO NPs were approved by the EDAX analysis. The XRD results revealed that it had a crystal structure that was similar to SDE-ZnO-NPs. The dose-related Acetylcholinesterase inhibitory action of SDE-ZnO NPs was determined utilizing the Ellman’s test. AChE activity of the synthesized nanoparticles showed potential inhibitory activity with IC50 values of 75.34 µg/mL. The antioxidant activity was investigated the biosynthesized ZnO-NPs using DPPH, ABTS assay.

Phytochemical Analysis of Wrightia tinctoria Leaves and Synthesis of ZnO Nanoparticles for the Remediation of Water Pollutants

In this work, zinc oxide nanoparticles (ZnO NPs) were fabricated using aqueous extract of Wrightia tinctoria leaves for evaluating its catalytic and antibacterial efficacy against water contaminants. The qualitative phytochemical estimation showed the presence of secondary metabolites alkaloids, tannins, terpenoids, steroids, glycosides, flavonoids and biomolecules carbohydrates and proteins in different solvent extracts. The quantitative estimation for phytochemicals showed total phenols (39.59 mg/g), total flavonoids (44.34 mg/g), total alkaloids (149.56 mg/g) and total tannins (56.47 mg/g). The GC-MS analysis revealed the bioactive compound mome inositol as the major phytochemical present in W. tinctoria leaves. The characterization of ZnO nanoparticles with XRD showed Bragg’s reflections at 2θ angles of 31.76º, 34.47º, 36.23º, 47.48º, 56.59º, 62.99º and 68.00º which confirmed the hexagonal wurtzite structure and size (86 nm) of the nanoparticles. The SEM analysis showed that the morphology of synthesized was spherical structure with uniform distribution. The ZnO nanoparticles effectively inhibited the growth of water contaminating bacterial pathogens viz. Escherichia coli, Staphylococcus aureus, Klebshiella pneumoniae and Streptococcus pneumoniae. The photocatalytic activity of ZnO oxide nanoparticles in degrading textile dyes, methylene blue and methyl orange was found to be effective.

The ZnO Nanoparticles: Synthesis, Characterization and Applications in Forensics

In most fields, including health, imaging, and forensic sciences, nanotechnology is a significant andpotent tool. It is quickly expanding and has potential in a number of areas, including industries,physical science, and medical care. ZnO nanoparticles has potential in advance forensic science andaid in crime detection. Advanced art analytical techniques can be used in characterization of ZnOnanoparticles, such as High-performance liquid chromatography (HPLC), X-ray diffractionspectroscopy, and SEM. Nanotechnology forensic investigations include questioned documents, inestimating the time of death and age of blood. Moreover, nanomaterials can be used for forensicinquiry, such as quantum dots, which can be employed as luminous materials for security features inofficial and private documents. Therefore, the purpose of this study was to introduce and explain theapplication of ZnO in forensic science as well as the equipment needed to conduct nano-analysis.

"Synthesis, Characterization of ZnO Nanoparticles and their Application in Antibacterial Activity "

"Synthesis, Characterization of ZnO Nanoparticles and their Application in Antibacterial Activity "

Influence of TiO2 and ZnO Nanoparticles on α-Synuclein and β-Amyloid Aggregation and Formation of Protein Fibrils

The most common neurological disorders, i.e., Parkinson's disease (PD) and Alzheimer's disease (AD), are characterized by degeneration of cognitive functions due to the loss of neurons in the central nervous system. The aggregation of amyloid proteins is an important pathological feature of neurological disorders.The aggregation process involves a series of complex structural transitions from monomeric to the formation of fibrils. Despite its potential importance in understanding the pathobiology of PD and AD diseases, the details of the aggregation process are still unclear. Nanoparticles (NPs) absorbed by the human circulatory system can interact with amyloid proteins in the human brain and cause PD. In this work, we report the study of the interaction between TiO2 nanoparticles (TiO2-NPs) and ZnO nanoparticles (ZnO-NPs) on the aggregation kinetics of β-amyloid fragment 1-40 (βA) and α-synuclein protein using surface-enhanced Raman spectroscopy (SERS) and tip-enhanced Raman spectroscopy (TERS). The characterizations of ZnO-NPs and TiO2-NPs were evaluated by X-ray diffraction (XRD) spectrum, atomic force microscopy (AFM), and UV-Vis spectroscopy. The interaction of nanoparticles with amyloid proteins was investigated by SERS. Our study showed that exposure of amyloid protein molecules to TiO2-NPs and ZnO-NPs after incubation at 37 °C caused morphological changes and stimulated aggregation and fibrillation. In addition, significant differences in the intensity and location of active Raman frequencies in the amide I domain were found. The principal component analysis (PCA) results show that the effect of NPs after incubation at 4 °C does not cause changes in βA structure.

Solvent Free Synthesis, Characterization and Application of Zinc Oxide Nano Particles in Tracer Diagnostic Techniques

Abstract: In this work, we report the synthesis of ZnO nanoparticles using Moringa Oleifera (Drumstick) leaves as natural precursor via precipitation method. The formation and characterization of ZnO nanoparticles was established by UV-VIS spectroscopy, Fourier transform infrared spectroscopy and Particle Analyzer. The absorbance at 361nm proves the formation of ZnO. The IR spectra results proved the capping and stabilizing agents. The size of the particle was found to be 246.7 nm. Further, the ZnO was used as a nutrient in improvement of plant growth.

Preparation and characterization of ZnO nanoparticles incorporated by mechanical milling into cellulose for electrical insulator applications

In this work, a novel composite material based on ZnO nanoparticles incorporated into cellulose polymers has been designed and prepared. For this purpose, the ex-situ prepared ZnO nanoparticles were dispersed into cellulose using mechanical milling. The effect of the percentage of ZnO nanoparticles doping into the prepared composite was studied. Dielectric properties of composite, as influenced by the compaction density, the level of ZnO nanoparticles doping into cellulose, and the temperature, were characterized using a liquid test fixture, a precision inductance capacitance and resistance meter at a radio frequency ranging from 5 to 30 MHz. It has been shown that ε and ε respectively correspondent to the dielectric constant and the loss factor of composite were affected by level of ZnO nanoparticles, compaction density and temperature of the samples. Both ε and ε increased with increasing the temperature and the level of ZnO nanoparticles, but decreased with increasing the frequency.

Synthesis and Characterization of ZnO Nanoparticles

This study is focused on hydrothermal synthesis method of zinc oxide nanoparticles by usingammonia and zinc chloride. Synthesized nanoparticles have been characterized by using Xray Diffraction, UV-vis and Photon Cross Correlation (PCCS) spectroscopies, TEManalysis. ZnO thin films were prepared by spin coating method from the solution of ZnOnanoparticles. XRD peak corresponds to hexagonal structure with cell parameter a=0.326nm and c=0.522 nm. The grain size of zinc oxide nanoparticles has been determined 43.3nm using the Scherrer formula. As a result of PCCS measurement, synthesized zinc oxidenanoparticles have the mean diameter of ~96 nm of main particles with particle sizedistribution range of from ~90 nm to ~99 nm. As the result of TEM, the respective size ofnanoparticles was around ~96 nm. ZnO nanoparticles were coated on glass and indium-tinoxide (ITO) substrates. The photocatalytic activities were studied ITO substrates with ZnOthin film. ZnO thin films were used as catalyst for reaction Cr(VI) into Cr(III).

The green and chemical synthesis, and characterization of ZnO nanoparticles by aqueous leaf extract of aloe vera

The exact physical and chemical properties of nanoparticles depend on the way in which they are synthesized. The common techniques are hypothermal methods, electrochemical deposition, sol-gel method, chemical vapour deposition, co-precipitation method etc. In the present study, zinc oxide nanoparticles have been synthesized by botanical extract and chemical reducing agents with major objective to compare the nature and average particle size of the nanoparticles synthesized by these two methods. An attempt is also made to understand the influence of molarity on the chemically synthesized NPs by varying the molar concentration of precursor. The structure and morphology of synthesized NPs have been studied using X-ray diffraction (XRD) technique. For chemically synthesized NPs the major peak was observed at 36.147 for both the precursor at 0.2M and 0.3M. The average crystalline size was found to be 13.09 nm and 11.09 nm for precursor at 0.2M and 0.3M respectively. The major peak for green method was observed at 36.147 with an average crystalline size of 9.2 nm. The study clearly indicates that, green method is particularly suitable for the synthesis of smaller sized NPs.In chemical method, the molarity of the precursor influences the particle size, as the molarity decreases particle size also decreases.