Synthesis and Characterization of Silver Nanoparticles from Fuzarium Oxysporum and Investigation of Their Antibacterial Activity

Ukkund, Shareefraza J.; Ashraf, Momin; Udupa, Apoorva B.; Gangadharan, Mayur; Pattiyeri, Aswanth; Yashawantha, Kyathanahalli Marigowda; Patil, Ravika; Puthiyllam, Prasad

doi:10.1016/j.matpr.2018.10.369

Cited by 12 publications

(5 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The average crystalline size of the AgNP on the hybrid was calculated from the Debye–Scherrer equation, expressed as 34 : where D represents the average crystalline size of AgNP; λ is the wavelength of X-ray used; k is the geometric factor equivalent to 0.9; while β represents the full width of the half-maximum diffraction peak (FWHM). The value of D was calculated as 21.94 nm, which indicated smaller crystalline size AgNP nanoparticles on the hybrid, when compared to the size of 25 nm reported by Dawodu et al 34 , but quite larger than the sizes of 15.77, 16.98 and 19.94 nm reported in another study by Ukkund et al 67 . These small crystalline particles could probably be attributed to efficient stabilization of the AgNPs by the biogenic components of the biomass STpe, preventing aggregation of the nanoparticles.…”

Section: Resultsmentioning

confidence: 54%

Biogenic and chemically synthesized Solanum tuberosum peel–silver nanoparticle hybrid for the ultrasonic aided adsorption of bromophenol blue dye

Akpomie

Conradie

2020

Sci Rep

View full text Add to dashboard Cite

This work was aimed at the synthesis of a hybrid (STpe-AgNP), obtained by impregnation of silver nanoparticles (AgNP) onto Solanum tuberosum peel (STpe), for the ultrasonic assisted adsorption of bromophenol blue (BB) dye. SEM, FTIR, XRD, EDX, TGA and BET techniques were used to characterize the adsorbents. The XRD, SEM and EDX confirmed successful impregnation of AgNPs onto STpe to form the hybrid. The AgNPs impregnated onto the hybrid were found to be water stable at various pH values of 2.0–9.0. Chi-square (χ2 < 0.024) and linear regression (R2 > 0.996) showed that the Freundlich model was best fitted among the isotherm models, corroborated by the oriented site model. Kinetic analysis conformed to the intraparticle diffusion and pseudo-first-order rate equations, while thermodynamics displayed a physical, spontaneous and endothermic adsorption process. The presence of competing Pb(II), Ni(II), Cd(II) and Zn(II) metal ions in solution interfered with the adsorption of BB onto the biosorbents. In terms of reusability, STpe and STpe-AgNP showed BB desorption of 91.3% and 88.5% respectively, using NaOH as eluent. Ultra-sonication significantly enhanced the adsorption of BB by both adsorbents, but the impregnation of AgNPs only slightly improved adsorption of the dye from the simulated wastewater. This study also illustrated that pristine STpe biomass waste is a cheap viable option for the decontamination of BB from water.

show abstract

Section: Resultsmentioning

confidence: 54%

Biogenic and chemically synthesized Solanum tuberosum peel–silver nanoparticle hybrid for the ultrasonic aided adsorption of bromophenol blue dye

Akpomie

Conradie

2020

Sci Rep

View full text Add to dashboard Cite

show abstract

“…From the literature data, we found that the precipitation of silver ions with a formation of AgOH starts at a pH between 7 and 8 and stops at a pH around 13, while any further pH increase leads to precipitate dissolution [ 45 ]. At pH values greater than 10, the peaks from the UV-VIS spectra become much taller and sharper, which can be associated with a uniform distribution and higher concentration of Ag-NPs [ 12 , 44 , 46 ]. This observation is aligned with the data observed from SEM images.…”

Section: Resultsmentioning

confidence: 99%

A Green, Simple and Facile Way to Synthesize Silver Nanoparticles Using Soluble Starch. pH Studies and Antimicrobial Applications

et al. 2021

View full text Add to dashboard Cite

Along with the progress of nanoscience and nanotechnology came the means to synthesize nanometric scale materials. While changing their physical and chemical properties, they implicitly changed their application area. The aim of this paper was the synthesis of colloidal silver nanoparticles (Ag-NPs by ultrasonic disruption), using soluble starch as a reducing agent and further as a stabilizing agent for produced Ag-NPs. In this context, an important parameter for Ag-NPs preparation is the pH, which can determine the particle size and stability. The physical-chemical behavior of the synthesized Ag-NPs (shape, size, dispersion, electric charge) is strongly influenced by the pH value (experiment being conducted for pH values in the range between 8 and 13). The presence of a peak located at 412 nm into the UV-VIS spectra demonstrates the presence of silver nano-spheres into the produced material. In UV/VIS spectra, we observed a specific peak for yellow silver nano-spheres located at 412 nm. Samples characterization was performed by scanning electron microscopy, SEM, energy-dispersive X-ray spectroscopy, EDX, Fourier-transform infrared spectroscopy, and FT-IR. For all Ag-NP samples, we determined the zeta and observed that the Ag-NP particles obtained at higher pH and have better stability. Due to the intrinsic therapeutic properties and broad antimicrobial spectrum, silver nanoparticles have opened new horizons and new approaches for the control of different types of infections and wound healing abilities. In this context, the present study also aims to confirm the antimicrobial effect of prepared Ag-NPs against several bacterial strains (indicator and clinically isolated strains). In this way, it was confirmed that the antimicrobial activity of synthesized Ag-NPs was good against Staphylococcus aureus (ATCC 25923 and S. aureus MSSA) and Escherichia coli (ATTC 25922 and clinically isolated strain). Based on this observation, we conclude that the prepared Ag-NPs can represent an alternative or auxiliary material used for controlling important nosocomial pathogens. The fungal reference strain Candida albicans was more sensitive at Ag-NPs actions (zone of inhibition = 20 mm) compared with the clinically isolated strain (zone of inhibition = 10 mm), which emphasizes the greater resistance of fungal strains at antimicrobial agent’s action.

show abstract

“…In T -S method, particles are produced in the dry form initially, then nanofluid dispersions are formed using stirring and ultrasonication. Nanoparticles of different sizes have been produced using several methods [37,38]. However, T -S method was widely adopted by the researchers in the preparation of many types of nanofluids [20,35,[39][40][41] due to ease in preparation of predetermined concentration.…”

Section: Nanofluid Preparationmentioning

confidence: 99%

Experimental investigation on thermal conductivity and stability of water-graphite nanofluid

Yashawantha

Vinod

2021

Journal of Thermal Engineering

View full text Add to dashboard Cite

Enhanced thermal conductivity of nanofluids has proven importance in enhancing heat transfer for many application. In this study, thermal conductivity of graphite nanopowder dispersed in water at different temperatures was studied experimentally. Stable nanofluids of different concentrations (0.2 vol%, 0.5 vol%, 0.8 vol%, 1 vol% and 1.5 vol%) are prepared using ultrasonic cleaner by sonicating for 3 hour. Thermal conductivity was measured from temperature 25 to 55 ºC with an interval of 5 ºC using KD2 Pro thermal properties analyser. Experimental results showed that thermal conductivity increases with increase in temperature and volume concentration. Thermal conductivity of Water – Graphite nanofluid showed enhancement of 5.6% to 20.42% for 0.2 vol% to 1.5 vol% of concentration at 25 ºC respectively. However, the maximum improvement of 39.72% was found at 1.5% of concentration at 55 ºC compared to water. A correlation was developed considering the effect of temperature and concentration using the regression method. The proposed correlation effectively predicts the thermal conductivity of Water – Graphite nanofluids with an accuracy of ±2.8%.

show abstract

Synthesis and Characterization of Silver Nanoparticles from Fuzarium Oxysporum and Investigation of Their Antibacterial Activity

Cited by 12 publications

References 14 publications

Biogenic and chemically synthesized Solanum tuberosum peel–silver nanoparticle hybrid for the ultrasonic aided adsorption of bromophenol blue dye

Biogenic and chemically synthesized Solanum tuberosum peel–silver nanoparticle hybrid for the ultrasonic aided adsorption of bromophenol blue dye

A Green, Simple and Facile Way to Synthesize Silver Nanoparticles Using Soluble Starch. pH Studies and Antimicrobial Applications

Experimental investigation on thermal conductivity and stability of water-graphite nanofluid

Contact Info

Product

Resources

About