Formation of Silver Nanoparticles via Aspilia pluriseta Extracts Their Antimicrobial and Catalytic Activity

Nyabola, Augustine Otieno; Kareru, Patrick; Madivoli, Edwin Shigwenya; Wanakai, Sammy Indire; Maina, Ernest Gachui

doi:10.1007/s10904-020-01497-7

Cited by 23 publications

(10 citation statements)

References 49 publications

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“…e UV-Vis spectra revealed the presence of the SPR band of the Au NPs at approximately 540 nm. is is in agreement with previous research [36,37]. e presence of the SPR band was as a result of collective oscillations of the free electrons caused by an interacting electromagnetic field in metallic NPs [38].…”

Section: Au Nanoparticle Characterizationsupporting

confidence: 93%

Biogenic Synthesis of Gold Nanoparticles from Physalis peruviana and Application in Wound Healing

Odongo

Okumu

Lugasi

et al. 2022

Journal of Chemistry

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Wound management is key to healing. Poorly managed wounds lead to abnormal biological reactions and complications. Microorganisms, bacteria or fungi, infect such wounds leading to their chronic nature. Gold nanoparticles (Au NPs) show wound healing properties. In addition, ethnobotanical information from Siaya County in Kenya shows the leaves of Physalis peruviana L. to be effective in wound management. A combination of Au NPs and leave extracts of Physalis peruviana L. through a one pot biogenic synthesis leads to a new effective wound management substance. The synthesis was done at room temperature 25°C and at 85°C. The UV-visible spectroscopy results show efficient sharper plasmon bands with a blue shift indicating a decrease in λ max compared to red shift which show an increase in λ max. The surface plasmon resonance is a sharper at wavelength of about 540 nm. Dynamic light scattering and zeta potential analysis show that the polydispersity index is high and this is attributed to heterogeneity of chemical components of the plants. Transmission electron microscopy results for Au NPs show similarity in their shapes and sizes with grain size boundaries of between 1 nm and 100 nm. The particles are spherically shaped and crystalline with small lattice due to the small grains. The gold nanoparticles synthesized from Physalis peruviana show antimicrobial activities against gram-positive bacteria and, gram-negative bacteria as well as gram-positive fungus. The inhibition zones for Au NPs of different concentrations vary significantly between concentrations (one-way ANOVA at P < 0.05 ). The highest antibacterial activity is at 100 mM of Au NPs against Escherichia coli, Bacillus subtilis, and Staphylococcus aureus. The inhibition zones for Au NPs at concentration of 100 mM and Physalis peruviana extract vary significantly in all the microbial cells, except for Pseudomonas aeruginosa (one-way ANOVA, F(3,11) = 2.67, P = 0.1189 ). Application of the Au NPs in wound healing is faster than controls. The Au NPs also have good biocompatibility as signs of infection were not present.

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Section: Au Nanoparticle Characterizationsupporting

confidence: 93%

Biogenic Synthesis of Gold Nanoparticles from Physalis peruviana and Application in Wound Healing

Odongo

Okumu

Lugasi

et al. 2022

Journal of Chemistry

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“…Although literature revealed that bacterial cell are generally more sensitive to AgNPs, biogenic AgNPs derived from Murraya koenigii leaf extract interestingly shown highly equal activity against Gram-negative bacteria P. aeruginosa (ZOI of 18 mm) and a fungus C. albicans (18 mm ZOI). 131 In 2020, several leaf extracts of plant such as Clerodendrum inerme , 132 Aspilia pluriseta , 133 Melia azedarach , 134 Scoparia dulcis , 135 and Lantana trifolia . 136 All these AgNPs are shown to exhibit an excellent antimicrobial activity against numerous common pathogenic microbes.…”

Section: Plant-mediated Biogenic Synthesis Of Agnps and Their Antimic...mentioning

confidence: 99%

Green synthesis of silver nanoparticles using plant extracts and their antimicrobial activities: a review of recent literature

et al. 2021

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“…Silver nanoparticles used in this study were synthesized using lignin following a previously reported protocol [ 26 , 27 ]. In brief, 3 mL of AgNO 3 (0.01 M) solution was mixed with 3 mL lignin (10% m / v ) in a round bottom flask which was then placed in the dark for 2 h to allow the bioreduction of Ag + to AgNPs to occur.…”

Section: Methodsmentioning

confidence: 99%

“…In this regard, green synthesized metallic nanoparticles such as AgNPs offer great potential, especially if they have been synthesized in an environmental benign way. Due to their anti-inflammatory, antifungal, and antiplatelet activities, silver nanoparticles are well suited for incorporating into composite materials as they display a broad spectrum of antimicrobial activity [ 24 , 25 , 26 ]. Therefore, the effect of incorporating lignin and AgNPs on the morphology, thermal, mechanical, and antimicrobial properties of AgNPs–Lg–TDI composite films were investigated.…”

Section: Introductionmentioning

confidence: 99%

Encapsulation of AgNPs in a Lignin Isocyanate Film: Characterization and Antimicrobial Properties

et al. 2023

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Lignin isolated from agricultural residues is a promising alternative for petroleum-based polymers as feedstocks in development of antimicrobial materials. A polymer blend based on silver nanoparticles and lignin–toluene diisocyanate film (AgNPs–Lg–TDIs) was generated from organosolv lignin and silver nanoparticles (AgNPs). Lignin was isolated from Parthenium hysterophorus using acidified methanol and used to synthesize lignin capped silver nanoparticles. Lignin–toluene diisocyanate film (Lg–TDI) was prepared by treating lignin (Lg) with toluene diisocyanate (TDI) followed by solvent casting to form films. Functional groups present and thermal properties of the films were evaluated using Fourier-transform infrared spectrophotometry (FT–IR), thermal gravimetry (TGA), and differential scanning calorimetry (DSC). Scanning electron microscopy (SEM), UV–visible spectrophotometry (UV–Vis), and Powder X-ray diffractometry (XRD) were used to assess the morphology, optical properties, and crystallinity of the films. Embedding AgNPs in the Lg–TDI films increased the thermal stability and the residual ash during thermal analysis, and the presence of powder diffraction peaks at 2θ = 20, 38, 44, 55, and 58⁰ in the films correspond to lignin and silver crystal planes (111). SEM micrographs of the films revealed the presence of AgNPs in the TDI matrix with variable sizes of between 50 to 250 nm. The doped films had a UV radiation cut-off at 400 nm as compared to that of undoped films, but they did not exhibit significant antimicrobial activity against selected microorganisms.

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Formation of Silver Nanoparticles via Aspilia pluriseta Extracts Their Antimicrobial and Catalytic Activity

Cited by 23 publications

References 49 publications

Biogenic Synthesis of Gold Nanoparticles from Physalis peruviana and Application in Wound Healing

Biogenic Synthesis of Gold Nanoparticles from Physalis peruviana and Application in Wound Healing

Green synthesis of silver nanoparticles using plant extracts and their antimicrobial activities: a review of recent literature

Encapsulation of AgNPs in a Lignin Isocyanate Film: Characterization and Antimicrobial Properties

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