Biosynthesis Microwave-Assisted of Zinc Oxide Nanoparticles with ZiziphusJujuba Leaves Extract: Characterization and Photocatalytic Application

The present work is intended to biosynthesize zinc oxide nanoparticles (ZnO NPs) via facile and modern route using aqueous Ziziphus jujuba leaves extract assisted by microwave and explore their photocatalytic degradation of methyl orange anionic dye and methylene blue cationic dye under solar irradiation. The biosynthesized microwave assisted ZnO NPs were characterized and the results showed that ZnO NPs contain hexagonal wurtzite and characterized with a well-defined spherical-like shape with an outstanding band gap (2.70 eV), average particle size of 25 nm and specific surface area of 11.4 m2/g. The photocatalytic degradation of the MO and MB dyes by biosynthesized ZnO NPs under solar irradiation was studied and the results revealed the selective nature of the ZnO NPs for the adsorption and further photocatalytic degradation of the MO dye compared to the MB dye. In addition, the photocatalytic degradation of MO and MB dyes by the ZnO NPs under solar radiation was fitted by the first-order kinetics. Moreover, the photodegradation mechanism proposed that superoxide ions and hydroxyl radicals are the main reactive species.

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

Journal of Biomedical Nanotechnology ◽

10.1166/jbn.2021.3144 ◽

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.

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Synthesis of Zinc Oxide Nanoparticles Using Rubus fairholmianus Root Extract and Their Activity against Pathogenic Bacteria

Molecules ◽

10.3390/molecules26103029 ◽

2021 ◽

Vol 26 (10) ◽

pp. 3029

Author(s):

Naresh Kumar Rajendran ◽

Blassan P. George ◽

Nicolette N. Houreld ◽

Heidi Abrahamse

Keyword(s):

Zinc Oxide ◽

Antibacterial Activity ◽

Zinc Oxide Nanoparticles ◽

Pathogenic Bacteria ◽

Average Particle Size ◽

Oxide Nanoparticles ◽

Root Extract ◽

Average Particle ◽

Zno Nps ◽

Promising Alternative

Recently, the biosynthesis of zinc oxide nanoparticles (ZnO NPs) from crude extracts and phytochemicals has attracted much attention. Green synthesis of NPs is cost-effective, eco-friendly, and is a promising alternative for chemical synthesis. This study involves ZnO NPs synthesis using Rubus fairholmianus root extract (RE) as an efficient reducing agent. The UV spectrum of RE-ZnO NPs exhibited a peak at 357 nm due to intrinsic bandgap absorption and an XRD pattern that matches the ZnO crystal structure (JCPDS card no: 36-1451). The average particle size calculated from the Debye–Scherrer equation is 11.34 nm. SEM analysis showed that the RE-ZnO NPs spherical in shape with clusters (1–100 nm). The antibacterial activity of the NPs was tested against Staphylococcus aureus using agar well diffusion, minimum inhibitory concentration, and bacterial growth assay. The R. fairholmianus phytochemicals facilitate the synthesis of stable ZnO NPs and showed antibacterial activity.

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Investigation on room temperature photoluminescence of pure and aluminum doped zinc oxide nanoparticles

Materials Science-Poland ◽

10.1515/msp-2015-0021 ◽

2015 ◽

Vol 33 (1) ◽

pp. 205-212 ◽

Cited By ~ 6

Author(s):

N. Srinivasan ◽

J.C. Kannan

Keyword(s):

Zinc Oxide ◽

Zinc Oxide Nanoparticles ◽

Average Particle Size ◽

Hexagonal Wurtzite Structure ◽

Spectral Studies ◽

Oxide Nanoparticles ◽

Average Particle ◽

Ir Studies ◽

Aluminum Doped Zinc Oxide ◽

Ft Ir

AbstractPure and aluminum doped zinc oxide nanoparticles were prepared by soft chemical method. The prepared nanoparticles were characterized by XRD, SEM-EDAX, UV-Vis, PL and FT-IR studies. XRD patterns revealed that the nanoparticles were crystallized in hexagonal wurtzite structure with an average particle size of 19 nm to 26 nm. The surface morphology was explored using SEM micrographs. The incorporation of aluminum was confirmed by EDAX and FT-IR studies. The band gaps of the particles were found from 3.48 eV to 3.53 eV through UV-Vis spectral studies. The defect related mechanism was investigated using PL measurements. The chemical functional groups in FT-IR spectra proved the formation of pure and aluminum doped zinc oxide nanoparticles.

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Functional Properties of Sonochemically Synthesized Zinc Oxide Nanoparticles and Cotton Composites

Nanomaterials ◽

10.3390/nano10091661 ◽

2020 ◽

Vol 10 (9) ◽

pp. 1661 ◽

Cited By ~ 3

Author(s):

Muhammad Tayyab Noman ◽

Michal Petrů

Keyword(s):

Zinc Oxide ◽

Zinc Oxide Nanoparticles ◽

Average Particle Size ◽

Antimicrobial Properties ◽

Acoustic Method ◽

Oxide Nanoparticles ◽

Average Particle ◽

Gram Positive ◽

X Ray ◽

Antimicrobial Performance

In this study, zinc oxide nanoparticles (nZnO) were synthesized, deposited, and successfully used for surface modification of cotton to enhance antimicrobial properties. An in situ ultrasonic acoustic method was applied to anchor nZnO on cotton. The results of scanning electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffraction confirmed the presence of nZnO on cotton. A homogenous distribution of nZnO with an average particle size 27.4 nm was found during the analysis of results. Antimicrobial performance of cotton-nZnO (C-nZnO) composites was evaluated against Gram-negative and Gram-positive microbes. The deposited amount of nZnO on C-nZnO composites was determined by volumetric titration through inductive couple plasma atomic emission spectroscopy. C-nZnO composites showed excellent antimicrobial performance especially against both Staphylococcus aureus (Gram-positive) and Escherichia coli. The durability and stability of C-nZnO composites were tested against leaching and washing. No significant fluctuation was found on deposited amount of nZnO before and after washing test for optimized sample. The results demonstrate that synthesized C-nZnO composite samples can be used as an alternative for antimicrobial bandages.

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Enhanced photocatalytic degradation of water pollutants using bio-green synthesis of zinc oxide nanoparticles (ZnO NPs)

Journal of Environmental Chemical Engineering ◽

10.1016/j.jece.2021.105772 ◽

2021 ◽

pp. 105772

Author(s):

Seerangaraj Vasantharaj ◽

Selvam Sathiyavimal ◽

Palanisamy Senthilkumar ◽

V.N. Kalpana ◽

Govindaraju Rajalakshmi ◽

...

Keyword(s):

Zinc Oxide ◽

Green Synthesis ◽

Photocatalytic Degradation ◽

Zinc Oxide Nanoparticles ◽

Oxide Nanoparticles ◽

Zno Nps ◽

Water Pollutants

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Eco Friendly Zinc Oxide Wurtzite Nanostructures and their Efficacy for Photocatalysis, Photoluminescence and Fluorescence Resonance Energy Transfer

10.21203/rs.3.rs-309748/v1 ◽

2021 ◽

Author(s):

Udari Wijesinghe ◽

Gobika Thiripuranathar ◽

Haroon Iqbal ◽

Farid Menaa ◽

Anam Razaaq

Keyword(s):

Zinc Oxide ◽

Energy Transfer ◽

Fluorescence Resonance Energy Transfer ◽

Average Particle Size ◽

Resonance Energy Transfer ◽

Resonance Energy ◽

Solar Irradiation ◽

Average Particle ◽

Zno Nps ◽

Fluorescence Resonance

Abstract In recent years, biosynthesized zinc oxide nanoparticles (ZnO NPs) are gaining importance due to their unique properties and tremendous applications. This study aimed to fabricate ZnO NPs by using extracts from various parts (i.e. stems, leaves, and inflorescences) of the traditional medicinal plant Heliotropium indicum (H. indicum) and to identify their photocatalysis, photoluminescence, and fluorescence resonance energy transfer (FRET) efficacy. The Ultraviolet-Visible (UV-Vis) spectrum was used to monitor the nanoparticles (NPs) formation, which exhibited a hypsochromic shifted absorption band between 360-370 nm. Fourier transform infrared (FTIR) analysis was carried out for the plant extracts and NPs to identify possible functional groups involved in the capping process. Transmission electron microscopy (TEM) analysis revealed NPs were spherical in shape and X-ray diffraction (XRD) results shown their wurtzite, hexagonal crystalline nature. Further, TEM and XRD consistently determined the average particle size ranging from 19 to 53 nm with more accuracy than scanning electron microscope (SEM). Dynamic light scattering (DLS) showed that the particles were well distributed and monodispersed. The maximum photocatalytic degradation of 95% was evaluated for biogenic ZnO NPs spectrophotometrically by monitoring the degradation of methylene blue (MB) dye (λmax = 662.8 nm) under solar irradiation. Photoluminescence (PL) analysis, revealed differentiated spectra with high-intensity emission peaks for biogenic ZnO NPs compared to chemically synthesized ZnO NPs. Eventually, the highest efficiency of FRET (80%) was found in ZnO NPs synthetized from the leaves. This remains the first attempt to synthesize multifunctional ZnO NPs using H. indicum for potential environmental and biomedical applications.

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Evaluation of the Effect of Nanoparticles Zinc Oxide/Camellia sinensis Complex on the Kidney of Rats Treated with Monosodium Glutamate: Antioxidant and Histological Approaches

Current Pharmaceutical Biotechnology ◽

10.2174/1389201020666190522075928 ◽

2019 ◽

Vol 20 (7) ◽

pp. 542-550 ◽

Cited By ~ 4

Author(s):

Nahla S. El-Shenawy ◽

Reham Z. Hamza ◽

Fawziah A. Al-Salmi ◽

Rasha A. Al-Eisa

Keyword(s):

Zinc Oxide ◽

Camellia Sinensis ◽

Zinc Oxide Nanoparticles ◽

Morphological Changes ◽

Monosodium Glutamate ◽

Oxide Nanoparticles ◽

High Dose ◽

Enzymatic Antioxidants ◽

Zno Nps ◽

Tea Extract

Background: Zinc oxide nanoparticles (ZnO NPs) are robustly used biomedicine. Moreover, no study has been conducted to explore the consequence of green synthesis of ZnO NPs with Camellia sinensis (green tea extract, GTE) on kidneys of rats treated with monosodium glutamate (MSG). Methods: Therefore, the objective of the research was designed to explore the possible defensive effect of GTE/ZnO NPs against MSG-induced renal stress investigated at redox and histopathological points. Results: The levels of urea and creatinine increased as the effect of a high dose of MSG, in addition, the myeloperoxidase and xanthine oxidase activates were elevated significantly with the high dose of MSG. The levels of non-enzymatic antioxidants (uric acid, glutathione, and thiol) were decreased sharply in MSG-treated rats as compared to the normal group. Conclusion: The data displayed that GTE/ZnO NPs reduced the effects of MSG significantly by reduction of the level peroxidation and enhancement intracellular antioxidant. These biochemical findings were supported by histopathology evaluation, which showed minor morphological changes in the kidneys of rats.

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Zinc oxide nanoparticles help to enhance plant growth and alleviate abiotic stress: A review

Current Protein and Peptide Science ◽

10.2174/1389203721666201016144848 ◽

2020 ◽

Vol 21 ◽

Author(s):

Mohammad Faizan ◽

Fangyuan Yu ◽

Chen Chen ◽

Ahmad Faraz ◽

Shamsul Hayat

Keyword(s):

Zinc Oxide ◽

Plant Growth ◽

Abiotic Stresses ◽

Zinc Oxide Nanoparticles ◽

Growth And Yield ◽

Oxide Nanoparticles ◽

Main Concern ◽

Negative Effects ◽

Zno Nps ◽

Agricultural Yield

: Abiotic stresses arising from atmosphere change belie plant growth and yield, leading to food reduction. The cultivation of a large number of crops in the contaminated environment is a main concern of environmentalists in the present time. To get food safety, a highly developed nanotechnology is a useful tool for promoting food production and assuring sustainability. Nanotechnology helps to better production in agriculture by promoting the efficiency of inputs and reducing relevant losses. This review examines the research performed in the past to show how zinc oxide nanoparticles (ZnO-NPs) are influencing the negative effects of abiotic stresses. Application of ZnO-NPs is one of the most effectual options for considerable enhancement of agricultural yield globally under stressful conditions. ZnO-NPs can transform the agricultural and food industry with the help of several innovative tools in reversing oxidative stress symptoms induced by abiotic stresses. In addition, the effect of ZnO-NPs on physiological, biochemical, and antioxidative activities in various plants have also been examined properly. This review summarizes the current understanding and the future possibilities of plant-ZnO-NPs research.

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