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Rose cyanidin 3,5-di-O-glucoside-assisted gold nanoparticles, their antiradical and photocatalytic activities

Aazam, Elham Shafik ; Zaheer, Zoya

Journal of materials science. Materials in electronics, 2020-06, Vol.31 (11), p.8780-8795 [Periódico revisado por pares]

New York: Springer US

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  • Título:
    Rose cyanidin 3,5-di-O-glucoside-assisted gold nanoparticles, their antiradical and photocatalytic activities
  • Autor: Aazam, Elham Shafik ; Zaheer, Zoya
  • Assuntos: Anthocyanins ; Antiinfectives and antibacterials ; Antioxidants ; Capping ; Characterization and Evaluation of Materials ; Chemistry and Materials Science ; Coliforms ; E coli ; Glucosides ; Gold ; Image transmission ; Materials Science ; Nanoparticles ; Optical and Electronic Materials ; Photocatalysis ; Photodegradation ; Reaction kinetics ; Room temperature ; Size distribution
  • É parte de: Journal of materials science. Materials in electronics, 2020-06, Vol.31 (11), p.8780-8795
  • Descrição: Cyanidin 3,5-di -O -glucoside anthocyanin was extracted from red rose flower petals and used as reducing and capping agent for the green synthesis of anisotropic gold nanoparticles (Au NPs). Transmission electron microscope (TEM) images indicated that the Au NPs have large number of small spheres of gold. Surface plasmon resonance band position strongly depended on the [HAuCl 4 ] and [anthocyanin]. Cationic surfactant distinctly changed the shape, size, number of NPs, and size distribution of Au nanodisks at room temperature. Conventional techniques were used to the estimate the antiradical and antimicrobial activities of the cyanidin 3,5-di -O -glucoside anthocyanin and gold NPs. The 2,2-diphenyl- l -picrylhydrazyl nitrogen radical (DPPH · ), two bacteria strains (Staphylococcus aureus and Escherichia coli), and two yeast strains (Candida albicans ATCC 10231 and Candida parapsilosis ATCC 22019) were used to determine the antioxidant and antimicrobial properties of CTAB-capped gold NPs. Eosin yellow photocatalytic degradation followed apparent first-order kinetics with activation energies of 54.4 kJ/mol and 39.5 kJ/mol, respectively, for oxidative and sunlight catalyzed paths. The photocatalytic rates drastically inhibited with scavengers, demonstrating that the reactive radical oxygen species (HO · and O 2 − ·) , holes (h + ) and electrons (e − ) played major role in the degradation.
  • Editor: New York: Springer US
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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