scholarly journals Green versus Chemical Precipitation Methods of Preparing Zinc Oxide Nanoparticles and Investigation of Antimicrobial Properties

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Bulcha Bekele ◽  
Anatol Degefa ◽  
Fikadu Tesgera ◽  
Leta Tesfaye Jule ◽  
R. Shanmugam ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Chemical Synthesis ◽  
Zinc Oxide Nanoparticles ◽  
Antimicrobial Properties ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
Synthesis Methods ◽  
Zno Nps ◽  
Precipitation Synthesis

Comparison of green and chemical precipitation method syntheses of zinc oxide nanoparticles (ZnO NPs) was performed, and antimicrobial properties were investigated. Avocado, mango, and papaya fruit extracts were carried out for the green synthesising methods, while the chemical precipitation method was chosen from chemical synthesis methods. Zinc nitrate was used as a salt precursor, whereas leaf extract was served as a reducing agent for green synthesising methods. In addition, sodium hydroxide, polyvinyl alcohol, and potassium hydroxide were used as reducing agents in the case of chemical precipitation synthesis methods. ZnO NPs were characterised by characterizing techniques such as Fourier transform infrared (FT-IR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The antimicrobial activities of prepared nanoparticles were evaluated on Bacillus subtilis (B. subtilis), Staphylococcus aureus (S. aureus), and Salmonella typhimurium (S. typhimurium). The particle sizes of the prepared samples which were evaluated by the Scherrer equation were in the range of 11-21 nm for green synthesis, while 30-40 nm for chemical precipitation synthesis methods. Small agglomerations were observed from SEM results of prepared ZnO NPs from both methods. Prepared ZnO NPs were showed strong antimicrobial properties. From the result, the inhibition zone was in the range of 15-24 mm for the green route and 7–15 mm for chemical precipitation methods, where the standard drugs have 25 mm of the zone of inhibition. A green synthesised method of preparing ZnO NPs gives promising antimicrobial properties compared to chemical synthesis and is also eco-friendly and safe compared to the chemical synthesis.

scholarly journals Zinc Oxide Nanoparticles for Revolutionizing Agriculture: Synthesis and Applications

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Sidra Sabir ◽  
Muhammad Arshad ◽  
Sunbal Khalil Chaudhari
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Hydrothermal Process ◽  
Antimicrobial Properties ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
Zno Nps ◽  
Biogenic Synthesis ◽  
Synthesis Properties ◽  
Transport Method

Nanotechnology is the most innovative field of 21st century. Extensive research is going on for commercializing nanoproducts throughout the world. Due to their unique properties, nanoparticles have gained considerable importance compared to bulk counterparts. Among other metal nanoparticles, zinc oxide nanoparticles are very much important due to their utilization in gas sensors, biosensors, cosmetics, drug-delivery systems, and so forth. Zinc oxide nanoparticles (ZnO NPs) also have remarkable optical, physical, and antimicrobial properties and therefore have great potential to enhance agriculture. As far as method of formation is concerned, ZnO NPs can be synthesized by several chemical methods such as precipitation method, vapor transport method, and hydrothermal process. The biogenic synthesis of ZnO NPs by using different plant extracts is also common nowadays. This green synthesis is quite safe and ecofriendly compared to chemical synthesis. This paper elaborates the synthesis, properties, and applications of zinc oxide nanoparticles.

scholarly journals Photocatalytic activity of biogenic zinc oxide nanoparticles: In vitro antimicrobial, biocompatibility, and molecular docking studies

2021 ◽  
Vol 10 (1) ◽  
pp. 1079-1091
Author(s):  
Mahboob Alam
Keyword(s):  
Zinc Oxide ◽  
Molecular Docking ◽  
Zinc Oxide Nanoparticles ◽  
Dye Degradation ◽  
Antimicrobial Properties ◽  
Morphological Properties ◽  
Diffusion Method ◽  
Oxide Nanoparticles ◽  
Zno Nps ◽  
Receptor Binding Site

Abstract The biogenic synthesis of zinc oxide nanoparticles (ZnO NPs) with pinecone extract (PCE) as a reducing agent and antibacterial agent was explored. The current study aims to investigate the biosynthesis of ZnO NPs and their effect on photocatalytic dye degradation and antimicrobial properties. The physical, chemical, and morphological properties of biogenic ZnO NPs synthesized using PCE were investigated using advanced spectroscopy techniques such as Fourier transform infrared spectroscopy (FTIR), UV-visible spectroscopy, transmission electron microscopy (TEM) analysis, selected area electron diffraction (SAED), and X-ray diffraction (XRD) techniques. The photocatalytic degradation of methylene blue was measured spectrophotometrically using biogenic ZnO NPs as nanocatalysts, and decolonization of solution indicates dye degradation gradually as exposure duration increases. The antimicrobial properties of ZnONPs against the tested pathogenic strains were demonstrated using the disc diffusion method. The antimicrobial efficacy of ZnONPs was further explained using molecular docking analysis. Confirmation of the lowest binding energy was used to predict receptor binding site with NPs in order to understand the mechanistic approach. ZnONPs are likely to interact with pathogens via mechanical enfolding, which could be one of the major toxicity actions of ZnONPs against strains. Furthermore, the nontoxicity and biocompatibility of ZnO NPs were studied, revealing impressive hemocompatibility with red blood cells (RBCs) and no significant toxicity to Brine shrimps at lower ZnONP concentrations.

Synthesis and Antimicrobial Properties of Zinc Oxide Nanoparticles

2020 ◽  
Vol 20 (10) ◽  
pp. 5977-5996 ◽  
Author(s):  
Saee Gharpure ◽  
Balaprasad Ankamwar
Keyword(s):  
Zinc Oxide ◽  
Zno Nanoparticles ◽  
Zinc Oxide Nanoparticles ◽  
Metal Oxide Nanoparticles ◽  
Antibacterial Properties ◽  
Antimicrobial Properties ◽  
Physical Contact ◽  
Oxide Nanoparticles ◽  
Synthesis Methods ◽  
Promising Alternative

With increase in incidence of multidrug resistant pathogens, there is a demand to adapt newer approaches in order to combat these diseases as traditional therapy is insufficient for their treatment. Use of nanotechnology provides a promising alternative as antimicrobial agents as against traditional antibiotics. Metal oxides have been exploited for a long times for their antimicrobial properties. Zinc oxide nanoparticles (ZnO NPs) are preferred over other metal oxide nanoparticles because of their bio-compatible nature and excellent antibacterial potentials. The basic mechanism of bactericidal nature of ZnO nanoparticles includes physical contact between ZnO nanoparticles and the bacterial cell wall, generation of reactive oxygen species (ROS) as well as free radicals and release of Zn2+ ions. This review focuses on different synthesis methods of ZnO nanoparticles, various analytical techniques frequently used for testing antibacterial properties, mechanism explaining antibacterial nature of ZnO nanoparticles as well as different factors affecting the antibacterial properties.

scholarly journals Insecticidal effects of zinc oxide nanoparticles and Beauveria bassiana TS11 on Trialeurodes vaporariorum (Westwood, 1856) (Hemiptera: Aleyrodidae)

2016 ◽  
Vol 107 (2) ◽  
pp. 299 ◽  
Author(s):  
Zahra KHOOSHE-BAST ◽  
Najmeh Sahebzadeh ◽  
Mansour GHAFFARI-MOGHADDAM ◽  
Ali MIRSHEKAR
Keyword(s):  
Zinc Oxide ◽  
Beauveria Bassiana ◽  
Zinc Oxide Nanoparticles ◽  
Hexagonal Wurtzite Structure ◽  
Trialeurodes Vaporariorum ◽  
Precipitation Method ◽  
Infrared Analysis ◽  
Oxide Nanoparticles ◽  
Zno Nps ◽  
Greenhouse Whitefly

<p><em></em>Greenhouse whitefly,<em> Trialeurodes vaporariorum</em> is a major pest of horticultural and ornamental plants and is usually controlled with insecticides or biological control agents. In the current study, we examined the effects of synthesized zinc oxide nanoparticles (ZnO NPs) and <em>Beauveria bassiana</em> TS11 on <em>T. vaporariorum</em> adults. ZnO NPs were synthesized by precipitation method. Field emission scanning electron microscope images indicated that ZnO NPs were non-compacted uniformly. X-ray diffraction results confirmed the hexagonal wurtzite structure of ZnO NPs. Fourier transform infrared analysis showed an intense absorption peak at a range of 434-555 cm<sup>-1</sup> related to Zn-O bond. In bioassays, adults were exposed to different concentrations of ZnO NPs (3, 5, 10, 15, 20 mg l<sup>-1</sup>) and fungi (10<sup>4</sup>, 10<sup>5</sup>, 10<sup>6</sup>, 10<sup>7</sup>, 10<sup>8</sup> spores ml<sup>-1</sup>). LC<sub>50</sub> values for ZnO NPs and fungi were 7.35 mg l<sup>-1</sup>and 3.28×10<sup>5</sup> spores ml<sup>-1</sup>, respectively. Mortality rates obtained with ZnO NPs and fungi at the highest concentration were 91.6 % and 88.8 %, respectively. The results indicate a positive effect of ZnO NPs and <em>B. bassiana </em>TS11on adults. The current study was conducted under laboratory conditions, therefore, more studies are needed in field.</p>

scholarly journals Antibacterial Action and Target Mechanisms of Zinc Oxide Nanoparticles Against Bacterial Pathogens

2021 ◽  
Author(s):  
Carolina Rosai Mendes ◽  
Guilherme Dilarri ◽  
Carolina Froes Forsan ◽  
Vinícius de Moraes Ruy Sapata ◽  
Paulo Renato Matos Lopes ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Bacterial Resistance ◽  
Membrane Integrity ◽  
Antimicrobial Properties ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction ◽  
Zno Nps ◽  
Z Ring ◽  
Ft Ir

Abstract Zinc oxide nanoparticles (ZnO NPs) are one of the most widely used nanoparticulate materials due to their antimicrobial properties, but their main mechanism of action (MOA) has not been fully elucidated. The study characterized ZnO NPs using X-ray diffraction, FT-IR spectroscopy and scanning electron microscopy. Antimicrobial activity of clinically bacteria Escherichia coli, Staphylococcus aureus, Bacillus subtilis and Pseudomonas aeruginosa was evaluated by REMA after exposure to the ZnO NP at concentrations from 0.2 to 1.4 mM. Sensitivity was achieved at 0.6 mM for the Gram-negatives and 1.0 mM for Gram-positives cells. The effect of ZnO NPs on the membrane integrity and in the interference of cell division was investigated by its effect on the divisional ring, through fluorescence microscopy assays using B. subtilis (amy::pspac-ftsZ-gfpmut1) expressing FtsZ-GFP. Results showed that ZnO NPs did not interfere with the assembly of the divisional Z-ring. However, 70% of the cells showed damage in the cytoplasmic membrane after 15 min of exposure to the ZnO NPs. Electrostatic forces, production of Zn2+ ions, generation of reactive oxygen species were described as pathways of bactericidal action by ZnO. Thus, understanding bactericidal MOA can produce predictive models to prevent bacterial resistance and lead to further research.

scholarly journals Influence of Zinc Oxide Nanoparticles and Char Forming Agent Polymer on Flame Retardancy of Intumescent Flame Retardant Coatings

Nanomaterials ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 42
Author(s):  
Tentu Nageswara Rao ◽  
T. Manohra Naidu ◽  
Min Soo Kim ◽  
Botsa Parvatamma ◽  
Y. Prashanthi ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Heat Release ◽  
Flame Retardant ◽  
Cone Calorimeter ◽  
Zinc Oxide Nanoparticles ◽  
Intumescent Flame Retardant ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
Zno Nps ◽  
Ul 94

Zinc oxide nanoparticles (ZnO NPs) were synthesized by a precipitation method, and a new charring–foaming agent (CFA) N-ethanolamine triazine-piperazine, melamine polymer (ETPMP) was synthesized via nucleophilic substitution reaction by using cyanuric chloride, ethanolamine, piperazine, and melamine as precursor molecules. FTIR and energy-dispersive X-ray spectroscopy (EDS) studies were employed to characterize and confirm the synthesized ETPMP structure. New intumescent flame retardant epoxy coating compositions were prepared by adding ammonium polyphosphate (APP), ETPMP, and ZnO NPs into an epoxy resin. APP and ETPMP were fixed in a 2:1 w/w ratio and used as an intumescent flame-retardant (IFR) system. ZnO NPs were loaded as a synergistic agent in different amounts into the IFR coating system. The synergistic effects of ZnO NPs on IFR coatings were systematically evaluated by limited oxygen index (LOI) tests, vertical burning tests (UL-94 V), TGA, cone calorimeter tests, and SEM. The obtained results revealed that a small amount of ZnO NPs significantly increased the LOI values of the IFR coating and these coatings had a V-0 ratings in UL-94 V tests. From the TGA data, it is clear that the addition of ZnO NPs could change the thermal degradation behaviors of coatings with increasing char residue percentage at high temperatures. Cone calorimeter data reported that ZnO NPs could decrease the combustion parameters including peak heat release rates (PHRRs), and total heat release (THR) rates. The SEM results showed that ZnO NPs could enhance the strength and the compactness of the intumescent char, which restricted the flow of heat and oxygen.

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.

scholarly journals Zinc Oxide Nanoparticles: chemical, physical and Biosynthesis Synthesis and its some Applications

2017 ◽  
Vol 1 (3) ◽  
Author(s):  
Rahma Algarni, Salwa Almalwi
Keyword(s):  
Zinc Oxide ◽  
Chemical Synthesis ◽  
Zinc Oxide Nanoparticles ◽  
Physical Vapor Deposition ◽  
Sol Gel ◽  
High Energy ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
Laser Ablation Method ◽  
Physical Synthesis

This review article described the major synthesis of Zinc oxide nanoparticles with various ways, such as physical synthesis, chemical synthesis and Biosynthesis. Chemical synthesis as Hydrothermal Technique, Vapor Transport, Precipitation Method, Self-Combustion technique, Sol-gel method and microemulsion method.  Physical synthesis as high-energy ball milling method, laser ablation method and Physical vapor deposition method. Biosynthesis Includes synthesis through fungi, plants, bacteria Some applications of zinc oxide nanoparticles have been listed.

Effect of Hydroxyl Concentration on the Structural and Optical Properties of Zinc Oxide Nanoparticles

2016 ◽  
Vol 866 ◽  
pp. 161-165
Author(s):  
Christian Mark Pelicano ◽  
Francis M. Mulimbayan
Keyword(s):  
Zinc Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
Oxide Nanoparticles ◽  
Energy Band Gap ◽  
Structural And Optical Properties ◽  
Excitonic Absorption ◽  
Peak Intensity ◽  
Transmission Electron

Zinc oxide (ZnO) nanoparticleswere successfully synthesized by chemical precipitation method at different hydroxyl concentrations. The resulting nanoparticles are characterized by transmission electron microscopy (TEM), ultraviolet-visible (UV-VIS) and photoluminescence (PL) spectroscopy. From TEM images, the measured average sizes of the nanoparticles were 4.45 nm to 5.26 nm. Selected area diffraction(SAED) patternsconfirmed that the nanoparticles were of highly crystalline ZnO having wurtzitephase structure.The energy band gap values red-shifted from 3.79 to 3.64 eV based from excitonic absorption peaks. All the samples exhibited a strong visible emission and decreasing peak intensity in increasing OH- concentration.

scholarly journals Plant-Mediated Biosynthesis and Photocatalysis Activities of Zinc Oxide Nanoparticles: A Prospect towards Dyes Mineralization

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Mohamed Awad Fagier
Keyword(s):  
Zinc Oxide ◽  
Green Synthesis ◽  
Zinc Oxide Nanoparticles ◽  
Vital Role ◽  
Oxide Nanoparticles ◽  
Synthesis Methods ◽  
High Electron ◽  
Zno Nps ◽  
Factors Affecting ◽  
Photodegradation Efficiency

In recent years, nanoparticles synthesis by green synthesis has gained extensive attention as a facile, inexpensive, and environmentally friendly method compared with chemical and physical synthesis methods. This review covered the biosynthesis of zinc oxide nanoparticles (ZnO NPs), including the procedure and mechanism. Factors affecting the formation of ZnO NPs are discussed. The presence of active bioorganic molecules in plant extract played a vital role in the formation of ZnO NPs as a natural green medium in the metallic ion reduction processes. ZnO NPs exhibit attractive photocatalysis properties due to electrochemical stability, high electron mobility, and large surface area. In this review, the procedure and mechanism of the ZnO photocatalysis process are studied. The effects of dyes amount, catalysts, and light on photodegradation efficiency are also considered. This review provides useful information for researchers who are dealing with green synthesis of ZnO NPs. Moreover, it can provide investigators with different perceptions towards the efficiency of biosynthesized ZnO NPs on dyes degradation and its restrictions.

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