Facile Synthesis Route of Au-Ag Nanostructures Soaked in PEG

Fodjo, Essy Kouadio; Canlier, Ali; Kong, Cong; Yurtsever, Ayhan; Guillaume, Pohan Lemeyonouin Aliou; Patrice, Fato Tano; Abe, Masayuki; Tohei, Tetsuya; Sakai, Akira

doi:10.4236/anp.2018.72004

Cited by 4 publications

(3 citation statements)

References 26 publications

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“…The graph of resonance absorption Au@Ag NPs has two-stage in the first two peaks Ag and Au core after with an increase in the amount of AgNO 3 , the specific peak of Au@Ag NPs was established and continued (Zhong et al, 2019). The observed crystalline nature of the Au@Ag NPs was further confirmed by the TEM image (Fodjo et al, 2018;Zhong et al, 2019). XRD patterns of Au@Ag NPs have constant and alike lattice constants and no other impurity metals (no peaks).…”

Section: Discussionmentioning

confidence: 78%

Production of biodiesel from oleaginous fungal lipid using highly catalytic bimetallic gold‐silver core‐shell nanoparticle

Al-Zaban

Alharbi

Mahmoud

et al. 2021

J of Applied Microbiology

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Aims: This study aims to synthesize, characterize and apply gold-silver core-shell nanoparticles (Au@Ag NPs), a nanocatalyst, to maximize biodiesel production from fungal isolate Fusarium solani (FS12) via a transesterification one-step reaction. Methods and Results:The Au@Ag NPs structure was examined by UV-vis spectrophotometer, transmission electron microscopy, X-ray diffraction and Fourier transform infrared (FTIR). All devices were used to characterize Au@Ag NPs and confirmed successful synthesis of nanoparticles. Fungal lipid was quantitatively determined by sulfo-phosphovanillin colorimetric method. Among 15 F. solani isolates obtained from rhizospheric soils of the date palm, F. solani (AF12) was chosen as the highly significant producer that accumulates above 20% lipid. The maximum biodiesel yield was 91.28 ± 0.19%, obtained under the optimum reaction conditions of 3% Au@Ag NPs as nanocatalyst concentration, and 1:20 oil to methanol molar ratio at 70℃ for 30 min. HPLC method was applied for monitoring in situ transesterification reaction. FTIR spectroscopy was used in qualitative analysis of biodiesel by verifying the presence of unique characteristic peaks of diagnostic significance. The quality of the biodiesel produced was confirmed by the high purity of fatty acid methyl esters analysis content up to >99%. Conclusions: These findings propose the applicability of F. solani (FS12) as a promising isolate to accumulate lipids and biodiesel production as a feedstock. Significance and Impact of the Study: The link between nanotechnology and fungi.Au@Ag NPs were synthesized at room temperature, which displayed high catalytic activity for in situ transesterification reaction. Catalytic activity appeared at low temperature, mole ratio and short reaction time. Oleaginous fungi are described as easily grown, have short life cycle, are cost-effective, and they utilized various sources of carbon up to waste and a simplified process to develop scale-up production as well, economic value, opposite the usage of vegetable oils which need for large agricultural areas.

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Section: Discussionmentioning

confidence: 78%

Production of biodiesel from oleaginous fungal lipid using highly catalytic bimetallic gold‐silver core‐shell nanoparticle

Al-Zaban

Alharbi

Mahmoud

et al. 2021

J of Applied Microbiology

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“…The bright rings and spots corresponding to the diffraction planes (111), ( 200) and (311) of the AgÀ Au crystal, indicating that the as-synthesized NPs had high crystallization. [35] XRD, EDX, and TGA measurements were made to acquire a deeper understanding of the crystal structure and elemental composition of the as-synthesized alloy NPs (Figure 4). As shown in the X-ray diffraction pattern, the fabricated sample exhibited distinct and strong peaks demonstrating the formation of NPs.…”

Section: Resultsmentioning

confidence: 99%

“…Selected area electron diffraction measurement showed that the Ag−Au alloy NPs were spherical. The bright rings and spots corresponding to the diffraction planes (111), (200) and (311) of the Ag−Au crystal, indicating that the as‐synthesized NPs had high crystallization [35] …”

Section: Resultsmentioning

confidence: 99%

Synthesis and Properties of Ag‐Au Alloy Nanoparticles with Controlled Composition for Computed Tomography Imaging Applications

Linh,

Tam,

et al. 2024

ChemNanoMat

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Numerous non‐invasive assays have been developed to support CT imaging, consequently increasing the precision of diagnosis. Although these efforts made a significant contribution to clinical research, there is still more to be done. The goal is to replace conventional contrast agents with more potent ones. In this study, Ag‐Au alloy nanoparticles were fabricated by substitution method between the precursor Au3+ and the previously prepared Ag nanoparticles. Effects of Au3+ quantity on the formation and characteristics of Ag‐Au alloy nanoparticles were investigated. It showed that Ag‐Au nanoalloy with a size of 14.2 ± 1.0 nm, SPR absorption peak at 520 nm, and Ag: Au atomic ratio of approximately 3:1 were appropriate for biomedical applications. After phase transfer using poly (maleic anhydride‐alt‐1‐octadecene) (PMAO), the nano Ag‐Au solution owned remarkable durability, stability and non‐toxicity Vero healthy cell line at high test concentration. In‐vitro CT imaging demonstrated a good X‐ray adsorption coefficient, and the hounsfield units (HU) was noticeably increased. As a promising CT contrast agent, the X‐ray attenuation of nano Ag‐Au solutions correlated linearly with concentrations. These findings led to a potential application in the biomedical field, particularly in computed tomography (CT) imaging diagnosis.

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Size-controlled synthesis of gold nanoparticles and related molecular imaging contrast for computed tomography

Nguyen,

Van Vu,

2024

J Nanopart Res

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Facile Synthesis Route of Au-Ag Nanostructures Soaked in PEG

Cited by 4 publications

References 26 publications

Production of biodiesel from oleaginous fungal lipid using highly catalytic bimetallic gold‐silver core‐shell nanoparticle

Production of biodiesel from oleaginous fungal lipid using highly catalytic bimetallic gold‐silver core‐shell nanoparticle

Synthesis and Properties of Ag‐Au Alloy Nanoparticles with Controlled Composition for Computed Tomography Imaging Applications

Size-controlled synthesis of gold nanoparticles and related molecular imaging contrast for computed tomography

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