Ziziphus spina-christi based bio-synthesis of Ag nanoparticles

Zayed, Mervat F.; Eisa, Wael H.; Abdel-Moneam, Yasser K.; El-Kousy, Salah M.; Atia, Asem A.

doi:10.1016/j.jiec.2014.07.041

Cited by 56 publications

(33 citation statements)

References 39 publications

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“…1a shows the UV-visible spectrum of different concentrations of PPG/AgNPs composite prepared using 5 mL natural honey and 1 mM aqueous AgNO 3 at 96 h reaction time. At about 390 nm, absorption peaks typical of that reported in literature [28,30] for silver resonance transition are observed for all the studied composites. However, it is noticed from the figure that the absorbance is concentration dependence and may implies that by increasing the polymer concentration, the composite grows bigger.…”

Section: Uv-vis Studysupporting

confidence: 77%

In-situ preparation, characterization and anticorrosion property of polypropylene glycol/silver nanoparticles composite for mild steel corrosion in acid solution

Solomon

Umoren

2016

Journal of Colloid and Interface Science

150

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Section: Uv-vis Studysupporting

confidence: 77%

In-situ preparation, characterization and anticorrosion property of polypropylene glycol/silver nanoparticles composite for mild steel corrosion in acid solution

Solomon

Umoren

2016

Journal of Colloid and Interface Science

150

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“…Furthermore, the catalytic potential of biofabricated NPs was evaluated for the reduction of anthropogenic pollutant o -nitroaniline ( o -NA). The use of biofabricated NPs in this direction could be seen as a prominent alternative for traditionally synthesized polymer supported nanocatalyst (Zayed and Eisa 2014 ; Zayed et al 2015 ), where the structure and functional group of polymer support influences the catalytic behavior of NPs (Liu et al 2007 ). However, in the case of biofabricated NPs, surface biomolecules (functional groups) can act as a polymer support, and influence of external polymer support on catalytic activity of NPs can be minimized (Sharma et al 2007 ; Gangula et al 2011 ; Dauthal and Mukhopadhyay 2012 , 2013b , 2015a , b ).…”

Section: Introductionmentioning

confidence: 99%

Phyto-synthesis and structural characterization of catalytically active gold nanoparticles biosynthesized using Delonix regia leaf extract

Dauthal

Mukhopadhyay

2016

3 Biotech

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Biological methods of nanoparticles synthesis are ecologically sound and sustainable alternative to the conventional methods. On the basis of aforesaid premise, the present study deals with the optimization and fabrication of gold nanoparticles (Au-NPs) using easily available bio-resource, Delonix regia leaf extract. The use of practically nontoxic natural extracts and water allows the synthesis pathways presented to be considered as ‘‘green’’ and so permitting the synthesized Au-NPs to be used in sensitive areas, such as bioremediation. Various characterization techniques are adopted for the evaluation of size, stability, morphology, crystal nature, and purity of nanoparticles. Ultraviolet–visible spectroscopy analysis showed a surface Plasmon resonance peak for prepared Au-NPs at 542 nm, and its absorbance increased with increasing the interaction time. Transmission electron microscopy analysis showed that the particles were spherical and 4–24 nm in size. Energy dispersive X-ray spectroscopy analysis displayed a 2.2 keV peak corresponding to the pure phase gold nanocrystal. X-ray diffraction analysis proved the fabrication of crystalline Au-NPs with face-centered cubic geometry within 10 min. Furthermore, ζ potential (−15 mV) and Fourier transform infrared data suggested the role of polar polyphenolic compounds of leaf extract in fabrication and stabilization process. Biofabricated nanoparticles are demonstrated to have catalytic activity for the reduction of toxic nitro-organic pollutant o-nitroaniline. Therefore, the present study offers a straightforward, cost-efficient, eco-friendly, and sustainable alternative for the fabrication of catalytically active Au-NPs.

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“…After addition of NaBH 4 to the aqueous solution of 4‐NP, the UV‐vis spectrum showed a distinct absorption maximum at 400 nm due to the formation of 4‐nitrophenolate ions . The dipping of the 100 mg Cs/Au nanocomposite film within the above mixture resulted in a gradual decrease of the absorption peak at 400 nm (Figure a).…”

Section: Resultsmentioning

confidence: 99%

“…[44] The dipping of the 100 mg Cs/Au nanocomposite film within the above mixture resulted in a gradual decrease of the absorption peak at 400 nm (Figure 7a). [44] The dipping of the 100 mg Cs/Au nanocomposite film within the above mixture resulted in a gradual decrease of the absorption peak at 400 nm (Figure 7a).…”

Section: -Npmentioning

confidence: 99%

In situ preparation of chitosan/gold nanocomposite: Structural and catalytic properties

et al. 2017

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Chitosan-stabilized gold nanoparticles (Cs/Au) film was prepared by casting strategy without a need for reducing and/or stabilizing agents. The shape, size, and crystalline phase were studied using UV-visible (UV-vis) spectroscopy, transmission electron microscopy (TEM), and X-ray diffraction (XRD). The nature of the interaction between the Cs and Au nanoparticles was studied using the Fourier transformer infrared (FTIR) spectroscopy. The as-prepared Cs/Au nanocomposite film showed high activity in the catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP)in the presence of an excess amount of NaBH 4 . Furthermore, the Cs/Au film is easily separable, as well as remains active after reused for 3 times. The Cs/Au nanocomposite film could be a promising candidate for various catalytic reactions. K E Y W O R D S4-Nitrophenol, catalytic reduction, chitosan, gold, nanocomposite

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Ziziphus spina-christi based bio-synthesis of Ag nanoparticles

Cited by 56 publications

References 39 publications

In-situ preparation, characterization and anticorrosion property of polypropylene glycol/silver nanoparticles composite for mild steel corrosion in acid solution

In-situ preparation, characterization and anticorrosion property of polypropylene glycol/silver nanoparticles composite for mild steel corrosion in acid solution

Phyto-synthesis and structural characterization of catalytically active gold nanoparticles biosynthesized using Delonix regia leaf extract

In situ preparation of chitosan/gold nanocomposite: Structural and catalytic properties

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