A review of the green synthesis of ZnO nanoparticles using plant extracts and their prospects for application in antibacterial textiles

In an era of environmentally friendly development, methods of the green synthesis of zinc oxide nanoparticles (ZnO NPs) from plant extracts have become a focus of research attention because of the benefits of environmental sustainability, simplicity, and low price. The present review introduces a green mechanism for the synthesis of ZnO NPs using the extracts of plants, exploring factors that influence the morphology of ZnO NPs and their antibacterial properties, and the mechanisms of antibacterial action. The results indicate that the factors that influence morphology include the intrinsic crystallographic morphological properties and conditions of the preparation of ZnO NPs. In terms of preparation conditions, the influence of plant extract concentration, precursor concentration, reaction time, and calcination temperature on NP morphology is related to the species of plants used, with precursor concentration the most significant factor affecting the morphology of ZnO NPs. A pH of 12 appears be the most appropriate alkalinity for the synthesis of ZnO NPs from plant extracts. In addition, the synthesized ZnO NPs display excellent antibacterial properties, the mechanism of which involves photocatalysis, reactive oxygen species, and interactions between ZnO NPs and bacterial surfaces. Factors influencing the antibacterial properties are the type of bacteria and the concentration and morphology of ZnO NPs. Finally, the methods of preparation of antibacterial textiles using synthetic ZnO NPs are discussed in relation to the preparation of antibacterial fibers, fabric, and composite textiles. Here, the future trend of such antibacterial textiles is considered, providing the direction for further research of antibacterial textiles.

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Antibacterial properties of Ag and Ag/AgCl nanoparticles from radish and tea extracts for water treatment applications

Water Science & Technology Water Supply ◽

10.2166/ws.2015.124 ◽

2015 ◽

Vol 16 (1) ◽

pp. 171-179

Author(s):

Yuphada Boonto ◽

Jirapat Ananpattarachai ◽

Puangrat Kajitvichyanukul

Keyword(s):

Antibacterial Activity ◽

Water Treatment ◽

Microwave Irradiation ◽

Green Synthesis ◽

Plant Extracts ◽

Antibacterial Properties ◽

Water Disinfection ◽

E Coli ◽

High Antibacterial Activity ◽

Complete Inactivation

Silver nanoparticles (AgNPs) have antibacterial properties and are widely used for water disinfection. This technology is commercially applied in point-of-use water treatment as a post-treatment for filtrate water. However, the current process of synthesizing AgNPs has several disadvantages including the use of hazardous chemicals, consumption of a large amount of energy and the formation of hazardous byproducts. Here, we report an alternative and green synthesis using plant extracts. In this work, the plant extracts came from radish (R) and tea (T), and the AgNPs were derived from a microwave irradiation method. The AgNPs synthesized by chemical-based microwave irradiation (Ag-C) were also used as a control material. The novel method produced a smaller size of nanostructures with good dispersion ability and less agglomeration than those from chemical synthesis. The antibacterial properties of AgNPs on Gram-negative bacteria Escherichia coli (E. coli) and Gram-positive bacteria Staphylococcus aureus (S. aureus) were investigated. The results revealed that AgNPs from both green synthesis and chemical-based methods inactivated both types of bacteria. The green-synthesized AgNPs from radish juice provided a higher percentage of inhibition of E. coli than that of S. aureus. The inactivation rates of the AgNPs increased with increasing concentration of AgNPs. As the concentration of the Ag/AgCl-R and Ag-R increased from 150 μg/mL to 300 μg/mL, complete inactivation required a reduced time for the reaction from 300 minutes to only 30 minutes. Finally, the Ag/AgCl-R and Ag-R offered high antibacterial activity while the Ag-T provided the lowest antibacterial activity. This work provides an alternative method for the eco-synthesis of antibacterial nanomaterials for water treatment.

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Facile Green Synthesis of LaCe Co-Doped ZnO Nanoparticles and Their Structural, Optical and Antibacterial Properties

Journal of Nanoscience and Technology ◽

10.30799/jnst.184.18040524 ◽

2018 ◽

Vol 4 (5) ◽

pp. 552-554

Author(s):

M. Karthikeyan ◽

A. Jafar Ahamed ◽

P. Vijaya Kumar

Keyword(s):

Green Synthesis ◽

Zno Nanoparticles ◽

Synthesis Method ◽

Antibacterial Properties ◽

Inert Gases ◽

Diffusion Method ◽

Zno Nps ◽

Vis Spectroscopy ◽

Doped Zno ◽

Co Doped

This present work describes the synthesis of LaCe co-doped zinc oxide (ZnO) nanoparticles (NPs) prepared by green method using Gymnema sylvestre (G. sylvestre) leaves as reducing as well as capping agent. Green synthesis method avoids inert gases, high pressure, laser radiation, high temperature, toxic chemicals etc. as compared to conventional method like sol-gel technique method, laser ablation method, solvothermal method, inert gas condensation method and chemical reduction method. The synthesized LaCe co-doped ZnO NPs was characterized by X-Ray diffraction (XRD), field emission scanning electron microscopy (FESEM), elemental analysis (EADX), Fourier transform infrared spectroscopy (FTIR), UV-vis spectroscopy and photoluminescence (PL). The LaCe co-doped ZnO NPs was tested against clinical pathogens such as gram positive G+ (Staphylococcus aureus and Streptococcus pneumoniae) and gram negative G- (Klebsiella pneumoniae, Shigella sydenteriae, Escherichia coli, Pseudomonas aeruginosa and Protus vulgaris) bacterial strains using agar well diffusion method.

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Green Synthesis and Applications of Nanomaterials

Current Pharmaceutical Biotechnology ◽

10.2174/1389201022666210412142734 ◽

2021 ◽

Vol 22 ◽

Author(s):

N.B. Singh ◽

Preeti Jain ◽

Anindita De ◽

Richa Tomar

Keyword(s):

Green Synthesis ◽

Plant Extracts ◽

Environmental Sustainability ◽

Lower Cost ◽

Scale Up ◽

Chemical Methods ◽

Scientific World ◽

Advance Method ◽

Physical And Chemical ◽

Synthesis Of Nanomaterials

: It is an age of nanomaterials. Nanotechnology has revolutionized the scientific world. Every sphere of technology has benefited a lot by using nanomaterials. Number of physical and chemical methods is being used for the synthesis of nanomaterials. In recent years much emphasis is given for green synthesis particularly by using plant extracts or microorganism. This is useful for promoting environmental sustainability. Microwave heating and ultrasound techniques are also being used for the synthesis of different type of nanomaterials. Green synthesis is an advance method of synthesizing nanomaterials over other methods because of simplicity, lower cost and relatively reproducible. Plants produce more stable nanoparticles compared to other means and it is very straightforward to scale up. The risk of contamination is also lower. In this article different method of green synthesis of nanomaterials, and applications have been reviewed and discussed.

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Review on Methodologies Used in the Synthesis of Metal Nanoparticles: Significance of Phytosynthesis Using Plant Extract as an Emerging Tool

Current Pharmaceutical Design ◽

10.2174/1381612826666200531150218 ◽

2020 ◽

Vol 26 (40) ◽

pp. 5188-5204

Author(s):

Uzair Nagra ◽

Maryam Shabbir ◽

Muhammad Zaman ◽

Asif Mahmood ◽

Kashif Barkat

Keyword(s):

Green Synthesis ◽

Metal Nanoparticles ◽

Plant Extracts ◽

Biomedical Applications ◽

Noble Metals ◽

Cost Effective ◽

Green Technology ◽

Critical Parameters ◽

Nanosized Particles ◽

Preparation Methods

Nanosized particles, with a size of less than 100 nm, have a wide variety of applications in various fields of nanotechnology and biotechnology, especially in the pharmaceutical industry. Metal nanoparticles [MNPs] have been synthesized by different chemical and physical procedures. Still, the biological approach or green synthesis [phytosynthesis] is considered as a preferred method due to eco-friendliness, nontoxicity, and cost-effective production. Various plants and plant extracts have been used for the green synthesis of MNPs, including biofabrication of noble metals, metal oxides, and bimetallic combinations. Biomolecules and metabolites present in plant extracts cause the reduction of metal ions into nanosized particles by one-step preparation methods. MNPs have remarkable attractiveness in biomedical applications for their use as potential antioxidant, anticancer and antibacterial agents. The present review offers a comprehensive aspect of MNPs production via top-to-bottom and bottom-to-top approach with considerable emphasis on green technology and their possible biomedical applications. The critical parameters governing the MNPs formation by plant-based synthesis are also highlighted in this review.

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Green synthesised silver nanoparticles incorporated electrospun poly(methyl methacrylate) nanofibers with different architectures for ophthalmologic alternatives

Journal of Bioactive and Compatible Polymers ◽

10.1177/0883911521997856 ◽

2021 ◽

Vol 36 (2) ◽

pp. 93-110

Author(s):

Princy Philip ◽

Tomlal Jose ◽

Sarath KS ◽

Sunny Kuriakose

Keyword(s):

Silver Nanoparticles ◽

Methyl Methacrylate ◽

Antibacterial Properties ◽

Analytical Techniques ◽

Morphological Properties ◽

Gram Positive ◽

Gram Negative ◽

Poly Methyl Methacrylate ◽

Antimicrobial Studies ◽

Eye Problems

Silver nanoparticles with 5–10 nm diameters are synthesised using Couroupita guianensis flower extract. The synthesised silver nanoparticles found to show good antimicrobial activity against gram negative and gram positive bacteria. Poly(methyl methacrylate) nanofibers with pristine, surface roughened and coaxial hollow forms are prepared by electrospinning. The structural and morphological properties of these pure and structurally modified poly(methyl methacrylate) nanofibers are evidenced by various analytical techniques. The antimicrobial studies of poly(methyl methacrylate) nanofibers having different architectures incorporated with silver nanoparticles are carried out. It is found that, all the three forms of poly(methyl methacrylate) nanofibers incorporated with silver nanoparticles show antibacterial properties against both gram positive and gram negative bacteria. Among these, surface roughened poly(methyl methacrylate) nanofibers incorporated with silver nanoparticles show highest antibacterial activity than the other two structural forms. The present study offers an alternative to the existing optical lenses. People especially those who suffer from eye problems can protect their eyes in a better way from infectious agents by wearing optical lens made from C. guianensis stabilised silver nanoparticles incorporated poly(methyl methacrylate) nanofibers than that made from pure poly(methyl methacrylate) nanofibers or films.

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A critical analysis of environmental sustainability metrics applied to green synthesis of nanomaterials and the assessment of environmental risks associated with the nanotechnology

The Science of The Total Environment ◽

10.1016/j.scitotenv.2021.148524 ◽

2021 ◽

pp. 148524

Author(s):

Angélica García-Quintero ◽

Manuel Palencia

Keyword(s):

Green Synthesis ◽

Environmental Sustainability ◽

Critical Analysis ◽

Environmental Risks ◽

Sustainability Metrics ◽

Synthesis Of Nanomaterials

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Green Synthesis and Incorporation of Sericin Silver Nanoclusters into Electrospun Ultrafine Cellulose Acetate Fibers for Anti-Bacterial Applications

Polymers ◽

10.3390/polym13091411 ◽

2021 ◽

Vol 13 (9) ◽

pp. 1411

Author(s):

Mujahid Mehdi ◽

Huihui Qiu ◽

Bing Dai ◽

Raja Fahad Qureshi ◽

Sadam Hussain ◽

...

Keyword(s):

Electron Microscopy ◽

Green Synthesis ◽

Cellulose Acetate ◽

Antibacterial Properties ◽

Vital Role ◽

Silver Nanoclusters ◽

Composite Fibers ◽

E Coli ◽

Antibacterial Performance ◽

Field Emission Electron Microscopy

Fiber based antibacterial materials have gained an enormous attraction for the researchers in these days. In this study, a novel Sericin Encapsulated Silver Nanoclusters (sericin-AgNCs) were synthesized through single pot and green synthesis route. Subsequently these sericin-AgNCs were incorporated into ultrafine electrospun cellulose acetate (CA) fibers for assessing the antibacterial performance. The physicochemical properties of sericin-AgNCs/CA composite fibers were investigated by transmission electron microscopy (TEM), field emission electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FTIR) and wide X-ray diffraction (XRD). The antibacterial properties of sericin-AgNCs/CA composite fibers against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) were systematically evaluated. The results showed that sericin-AgNCs incorporated in ultrafine CA fibers have played a vital role for antibacterial activity. An amount of 0.17 mg/mL sericin-AgNCs to CA fibers showed more than 90% results and elevated upto >99.9% with 1.7 mg/mL of sericin-AgNCs against E. coli. The study indicated that sericin-AgNCs/CA composite confirms an enhanced antibacterial efficiency, which could be used as a promising antibacterial product.

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