Synthesis of Eco-Friendly Silver Nanoparticles from Securidaca Longepedunculata and Artocarpus Heterophyllus Powders and Evaluation of their Antibacterial Properties

Aqueous extracts of Securidacalongepedunculata and Artocarpusheterophyllus were screened for photochemicals and both were found to contain saponins, tannins, flavonoid, cardiac glycosides, anthraquinones and alkaloids. Biosynthesis of silver nanoparticles was carried out from these extracts. The formation and stability of the reduced nanoparticles in the colloidal solutions were monitored using UV-visible spectroscopy. The Fourier transform infra-red spectroscopy (FTIR), indicated the presence of bio-molecules responsible for reduction and stabilization of the nanoparticles. The morphology of the nanoparticles formed from Securidacalongepedunculata was flake like and that from Artocarpusheterophyllus was plate-like as shown by scanning electron microscopy (SEM). The nanoparticles from both plants showed potent anti-bacterial activities towards Staphylococcus aureus, a gram positive bacterium.

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Green synthesis of silk sericin-embedded silver nanoparticles and their antibacterial application against multidrug-resistant pathogens

Journal of Genetic Engineering and Biotechnology ◽

10.1186/s43141-021-00176-5 ◽

2021 ◽

Vol 19 (1) ◽

Author(s):

Md. Abdullah Al Masud ◽

Hamid Shaikh ◽

Md. Shamsul Alam ◽

M. Minnatul Karim ◽

M. Abdul Momin ◽

...

Keyword(s):

Silver Nanoparticles ◽

Green Synthesis ◽

Bombyx Mori ◽

Multidrug Resistant ◽

Visible Spectroscopy ◽

Silk Sericin ◽

X Ray ◽

Synthesis Strategy ◽

Uv Visible ◽

Multidrug Resistant Pathogens

Abstract Background The green synthesis strategy of metallic nanoparticles (NPs) has become popular due to being environmentally friendly. Stable silver nanoparticles (AgNPs) have been synthesized by natural products such as starch, soy protein, various extract of leaves, barks, and roots functioning both as reducing and stabilizing agents. Likewise, silk sericin (SS) is a globular protein discarded in the silk factory might be used for NP synthesis. In this research, we focus on the green synthesis and stabilization of AgNPs by SS as well as assessment of their antibacterial activities against some drug-resistant pathogen. Results SS was extracted from Bombyx mori silkworm cocoons in an aqueous medium. 17 w/w% of dry sericin powder with respect to the cocoon’s weight was obtained by freeze-drying. Furthermore, AgNPs conjugated to sericin, i.e., SS-capped silver nanoparticles (SS-AgNPs) were synthesized by easy, cost-effective, and environment-friendly methods. The synthesized SS-AgNPs were characterized by UV-visible spectroscopy, Fourier-transform infrared-attenuated total reflection (FTIR-ATR) spectroscopy, transmission electron microscopy (TEM), and X-ray diffraction measurement. It has been found from the absorbance of UV-visible spectroscopy that a higher percent of SS-AgNPs was obtained at a higher concentration of silver nitrate solution. FTIR-ATR spectra showed that the carboxylate groups obtained from silk sericin act as a reducing agent for the synthesis of silver nanoparticles, while NH2+ and COO− act as a stabilizer of AgNPs. The X-ray diffractogram of SS-AgNPs was quite different from AgNO3 and sericin due to a change in the crystal structure. The diameter of AgNPs was around 20–70 nm observed using TEM. The synthesized SS-AgNPs exhibited strong antibacterial activity against multidrug-resistant pathogens, Escherichia coli and Pseudomonas aeruginosa. Minimal inhibitory/bactericidal concentrations against E. coli and P. aeruginosa were 20μg/mL. Conclusions This study encourages the use of Bombyx mori for the ecofriendly synthesis of SS-AgNPs to control multidrug-resistant microorganisms.

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Optical and Photoacoustic Properties of Laser-Ablated Silver Nanoparticles in a Carbon Dots Solution

Molecules ◽

10.3390/molecules25245798 ◽

2020 ◽

Vol 25 (24) ◽

pp. 5798

Author(s):

Amir Reza Sadrolhosseini ◽

Ganesan Krishnan ◽

Suhaidi Shafie ◽

Suraya Abdul Rashid ◽

Sulaiman Wadi Harun

Keyword(s):

Silver Nanoparticles ◽

Carbon Dots ◽

Thermal Effusivity ◽

Nonlinear Susceptibility ◽

Time Range ◽

Raman Signal ◽

Optical Parameters ◽

Visible Spectroscopy ◽

Transmission Electron ◽

Uv Visible

This study used the carbon dots solution for the laser ablation technique to fabricate silver nanoparticles. The ablation time range was from 5 min to 20 min. Analytical methods, including Fourier transform infrared spectroscopy (FTIR), UV-visible spectroscopy, transmission electron microscopy, and Raman spectroscopy were used to categorize the prepared samples. The UV-visible and z-scan techniques provided optical parameters such as linear and nonlinear refractive indices in the range of 1.56759 to 1.81288 and 7.3769 × 10−10 cm2 W−1 to 9.5269 × 10−10 cm2 W−1 and the nonlinear susceptibility was measured in the range of 5.46 × 10−8 to 6.97 × 10−8 esu. The thermal effusivity of prepared samples, which were measured using the photoacoustic technique, were in the range of 0.0941 W s1/2 cm−2 K−1 to 0.8491 W s1/2 cm−2 K−1. The interaction of the prepared sample with fluoride was investigated using a Raman spectrometer. Consequently, the intensity of the Raman signal decreased with the increasing concentration of fluoride, and the detection limit is about 0.1 ppm.

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Synthesis of Azo Polyurethane-Urea and Investigation of its Thermo-Optic Properties

Zeitschrift für Physikalische Chemie ◽

10.1515/zpch-2015-0581 ◽

2016 ◽

Vol 230 (2) ◽

Cited By ~ 2

Author(s):

Caihong Chen ◽

Zhening Yang ◽

Fengxian Qiu ◽

Tianlin Cao ◽

Guorong Cao ◽

...

Keyword(s):

Coupling Reaction ◽

Physical And Mechanical Properties ◽

Isophorone Diisocyanate ◽

Visible Spectroscopy ◽

Diazo Coupling ◽

Uv Visible ◽

Diazo Coupling Reaction ◽

The Fourier Transform ◽

Azo Chromophore ◽

Azo Polyurethane

AbstractAn azo chromophore molecular S(-)-1,2-bis(4-azophenyl-4-nitro)-ethylenediamine (OABANEDA) was synthesized with 4-nitroaniline and S(-)-1,2-diphenyl ethylenediamine by diazo-coupling reaction. The azo polyurethane-urea (OAAPUU) was obtained from OABANEDA, polyether diol (NJ-210) and isophorone diisocyanate (IPDI). The structure of OAAPUU was characterized by the Fourier transform infrared and UV-visible spectroscopy. The physical and mechanical properties of OAAPUU were investigated. The refractive index (

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Bio Synthesis and Characterization of Silver Nanoparticles Using Lagenaria siceraria Leaf Extract and their Antibacterial Activity

International Letters of Chemistry Physics and Astronomy ◽

10.18052/www.scipress.com/ilcpa.38.35 ◽

2014 ◽

Vol 38 ◽

pp. 35-45 ◽

Cited By ~ 2

Author(s):

B. Anandh ◽

A. Muthuvel ◽

M. Emayavaramban

Keyword(s):

Silver Nanoparticles ◽

Leaf Extract ◽

Face Centered Cubic ◽

Lagenaria Siceraria ◽

Human Pathogens ◽

X Ray Diffraction ◽

Visible Spectroscopy ◽

X Ray ◽

Ft Ir ◽

Uv Visible

The present investigation demonstrates the formation of silver nanoparticles by the reduction of the aqueous silver metal ions during exposure to the Lagenaria siceraria leaf extract. The synthesized AgNPs have characterized by UV-visible spectroscopy, X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) techniques. AgNPs formation has screened by UV-visible spectroscopy through colour conversion due to surface plasma resonance band at 427 nm. X-ray diffraction (XRD) confirmed that the resulting AgNPs are highly crystalline and the structure is face centered cubic (fcc). FT-IR spectrum indicates the presence of different functional groups present in the biomolecules capping the nanoparticles. Further, inhibitory activity of AgNPs and leaf extract were tested against human pathogens like gram-pastive (Staphylococcus aureus, Bacillus subtilis), gram-negative (Escherichia coli and Pseudomonas aeruginosa). The results indicated that the AgNPs showed moderate inhibitory actions against human pathogens than Lagenaria siceraria leaf extract, demonstrating its antimicrobial value against pathogenic diseases

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Mythology Merges with Technology for Majestic Production of Silver Nanoparticles: Rudraksha Enabled

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.585.144 ◽

2012 ◽

Vol 585 ◽

pp. 144-148

Author(s):

Poushpi Dwivedi ◽

S.S. Narvi ◽

R.P. Tewari

Keyword(s):

Silver Nanoparticles ◽

Vital Role ◽

Environmentally Benign ◽

Size Analysis ◽

Visible Spectroscopy ◽

Efficient Manner ◽

X Ray ◽

Transmission Electron ◽

Uv Visible ◽

Cost Efficient

In this nanoregime attempts to bring forth nanoparticles and nanomaterials are myriads, with there interesting and demanding applications in almost every field. Today the field of nanoscience has bloomed with the confluence of nanotechnology with material science, biology, biotechnology and medicine and the need for nanotechnology will only increase as miniaturization becomes extremely important in various arrays of life. Since time immemorial silver nanoparticles have been extensively used for hygienic and healing purposes, and even until most recently, it has indispensible vital role especially in the biomedical arena. Thus in an attempt to generate silver nanoparticles employing green, environmentally benign route, we have designed to converge mythology with technology, with the mystical production of silver nanoparticles, enabled by the blueberry beads of the plant Elaeocarpus granitrus Roxb., the Rudraksha. This non-degradable bead does not disintegrate, but retains the potentiality, even after unlimited production of silver nanoparticles, assisting infinite times. The extremely cost-efficient nanoparticles thus developed in a superiorly efficient manner were characterized through different techniques; like UV/visible spectroscopy, PL spectroscopy, transmission electron microscopy, energy dispersive X-ray analysis and nanoparticle size analysis.

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Biosynthesis of silver nanoparticles using lavender leaf and their applications for catalytic, sensing, and antioxidant activities

Nanotechnology Reviews ◽

10.1515/ntrev-2016-0041 ◽

2016 ◽

Vol 5 (6) ◽

Cited By ~ 11

Author(s):

Brajesh Kumar ◽

Kumari Smita ◽

Luis Cumbal

Keyword(s):

Silver Nanoparticles ◽

Leaf Extract ◽

Antioxidant Activities ◽

Present Report ◽

X Ray Diffraction ◽

Visible Spectroscopy ◽

X Ray ◽

Transmission Electron ◽

Red Color ◽

Uv Visible

AbstractThe present report summarizes an eco-friendly approach for the biosynthesis of silver nanoparticles (AgNPs) using the leaf extract of lavender. Initially, the synthesis of AgNPs was visually observed by the appearance of a wine red color. The optical property, morphology, and structure of as-synthesized AgNPs were characterized by UV-visible spectroscopy, dynamic light scattering, transmission electron microscopy, and X-ray diffraction analyses. All characterization data revealed the formation of crystalline and spherical AgNPs (Ag/Ag

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A Facile Method for the Synthesis of Silver Nanoparticles in the Presence of Sodium Phosphate

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.109.174 ◽

2011 ◽

Vol 109 ◽

pp. 174-177 ◽

Cited By ~ 2

Author(s):

Yu Li Shi ◽

Qi Zhou ◽

Li Yun Lv ◽

Wang Hong

Keyword(s):

Electron Microscopy ◽

Silver Nanoparticles ◽

Sodium Phosphate ◽

X Ray Diffraction ◽

Visible Spectroscopy ◽

X Ray ◽

Stabilizing Agents ◽

Transmission Electron ◽

Silver Nps ◽

Uv Visible

A facile method for the synthesis of silver nanoparticles (NPs) has been developed by using sodium phosphate (Na3PO4) as stabilizing agents and glucose the reducing agent, respectively. The obtained silver NPs have been characterized by X-ray diffraction (XRD), UV-visible spectroscopy (UV-vis) and transmission electron microscopy (TEM). It was found that in the presence of sodium phosphate, silver NPs with different morphologies and sizes were obtained. The formation mechanism of diverse silver NPs was studied preliminarily.

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Biosynthesis and Characterisation of Silver Nanoparticles using Leaf Extract of Achras sapota l. for its Antimicrobial Activity

International Journal of Scientific Research in Science and Technology ◽

10.32628/ijsrst207548 ◽

2020 ◽

pp. 246-256

Author(s):

Maphibanri Maring ◽

Akila Elias ◽

V. B. Narayanaswamy

Keyword(s):

Antimicrobial Activity ◽

Silver Nanoparticles ◽

Leaf Extract ◽

Colour Change ◽

Visible Spectroscopy ◽

Sem And Tem ◽

Achras Sapota ◽

Uv Visible ◽

Biosynthesized Agnps ◽

Ethanolic Leaf Extract

Nanotechnology is a field that is rapidly growing, making an impact in all spheres of human life. In the current study, silver nanoparticles were synthesized using the ethanolic leaf extract of Achras sapota. Characterization was carried out using UV-Visible spectroscopy, FTIR, XRD, SEM and TEM. The formation of AgNPs was confirmed through UV-Visible spectroscopy by the colour change. Based on the XRD pattern, the crystalline property of the AgNPs was established. The functional group present in the ethanolic leaf extract of Achras sapota is responsible for the reduction of the Ag+ ion which was studied through FTIR. From the SEM and TEM analysis, it was found that the formed nanoparticles are spherical in shape and nano in size. The biosynthesized AgNPs was evaluated for its antimicrobial activity against gram positive bacteria (S. aureus and L. bacillus) and gram negative bacteria (E. coli and P. aeruginosa) using disc diffusion for preliminary screening of antimicrobial activity and dilution method for evaluation of antibacterial effectiveness and effect of silver nanoparticles on bacterial growth and it was found to exhibit potential antimicrobial activity. The biosynthesized AgNPs was found to be efficient in terms of reaction time as well as stability, eco-friendly and cost effective.

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Phyto-Extract-Mediated Synthesis of Silver Nanoparticles Using Aqueous Extract of Sanvitalia procumbens, and Characterization, Optimization and Photocatalytic Degradation of Azo Dyes Orange G and Direct Blue-15

Molecules ◽

10.3390/molecules26206144 ◽

2021 ◽

Vol 26 (20) ◽

pp. 6144

Author(s):

Madeeha Aslam ◽

Fozia Fozia ◽

Anadil Gul ◽

Ijaz Ahmad ◽

Riaz Ullah ◽

...

Keyword(s):

Silver Nanoparticles ◽

Carboxylic Acid ◽

Plant Extract ◽

Visible Spectroscopy ◽

X Ray ◽

Direct Blue ◽

Orange G ◽

Ft Ir ◽

Uv Visible ◽

Direct Blue 15

Green synthesis of silver nanoparticles (AgNPs) employing an aqueous plant extract has emerged as a viable eco-friendly method. The aim of the study was to synthesize AgNPs by using plant extract of Sanvitalia procumbens (creeping zinnia) in which the phytochemicals present in plant extract act as a stabilizing and reducing agent. For the stability of the synthesized AgNPs, different parameters like AgNO3 concentration, volume ratios of AgNO3, temperature, pH, and contact time were studied. Further, AgNPs were characterized by UV–visible spectroscopy, FT-IR (Fourier Transform Infrared Spectroscopy), XRD (X-ray Diffraction), SEM (Scanning Electron Microscopy), and EDX (Energy Dispersive X-ray Spectrometer) analysis. FT-IR analysis showed that the plant extract contained essential functional groups like O–H stretching of carboxylic acid, N–H stretching of secondary amides, and C–N stretching of aromatic amines, and C–O indicates the vibration of alcohol, ester, and carboxylic acid that facilitated in the green synthesis of AgNPs. The crystalline nature of synthesized AgNPs was confirmed by XRD, while the elemental composition of AgNPs was detected by energy dispersive X-ray analysis (EDX). SEM studies showed the mean particle diameter of silver nanoparticles. The synthesized AgNPs were used for photocatalytic degradation of Orange G and Direct blue-15 (OG and DB-15), which were analyzed by UV-visible spectroscopy. Maximum degradation percentage of OG and DB-15 azo dyes was observed, without any significant silver leaching, thereby signifying notable photocatalytic properties of AgNPs.

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Green Synthesis of Silver Nanoparticles using Polyalthia longifolia Stem Bark Extract and its Catalytic Reduction of 4-Nitrophenol

Asian Journal of Chemistry ◽

10.14233/ajchem.2019.22071 ◽

2019 ◽

Vol 31 (11) ◽

pp. 2439-2442

Author(s):

Karuppiah Muthu ◽

B. Akilandaeaswari ◽

S. Mangala Nagasundari

Keyword(s):

Silver Nanoparticles ◽

Green Synthesis ◽

Catalytic Reduction ◽

Stem Bark ◽

Bark Extract ◽

Visible Spectroscopy ◽

Transmission Electron ◽

Stem Bark Extract ◽

Uv Visible ◽

Polyalthia Longifolia

In this present study, green synthesis of silver nanoparticles (AgNPs) was synthesized from silver nitrate using the reducing agents of Polyalthia longifolia bark extract and applied the catalyst in the reduction/degradation of environmental polluted organic compound in the presence of NaBH4. Initially, the colourless reaction mixture was slowly changed to yellowish brown, UV-visible spectroscopy of surface plasmon resonance centre at 447 nm confirmed the formation of AgNPs. High resolution transmission electron microscopy (HRTEM) clearly identified the spherical shapes nanoparticles with diameters sizes 5-25 nm. This AgNPs has excellent catalyst in the catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) as compared to the reducing agent of NaBH4 (chemical) and plant extract (natural).

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