The Experts below are selected from a list of 1605 Experts worldwide ranked by ideXlab platform

M J De Galindez - One of the best experts on this subject based on the ideXlab platform.

Joshi P.a. - One of the best experts on this subject based on the ideXlab platform.

P.a. Joshi - One of the best experts on this subject based on the ideXlab platform.

Masoud Salavatiniasari - One of the best experts on this subject based on the ideXlab platform.

  • biosynthesis and characterization of silver nanoparticles prepared from two novel natural precursors by facile thermal decomposition methods
    Scientific Reports, 2016
    Co-Authors: Mojgan Goudarzi, Mehdi Mousavikamazani, Samira Bagheri, Noshin Mir, Masoud Salavatiniasari
    Abstract:

    In this work, two natural sources, including pomegranate peel extract and Cochineal dye were employed for the synthesis of silver nanoparticles. The natural silver complex from pomegranate peel extract resulted in nano-sized structures through solution-phase method, but this method was not efficient for Cochineal dye-silver precursor and the as-formed products were highly agglomerated. Therefore, an alternative facile solid-state approach was investigated as for both natural precursors and the results showed successful production of well-dispersed nanoparticles with narrow size distribution for Cochineal dye-silver precursor. The products were characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Energy dispersive X-ray microanalysis (EDX), and Transmission Electron Microscopy (TEM).

  • biosynthesis and characterization of silver nanoparticles prepared from two novel natural precursors by facile thermal decomposition methods
    Scientific Reports, 2016
    Co-Authors: Mojgan Goudarzi, Mehdi Mousavikamazani, Samira Bagheri, Masoud Salavatiniasari
    Abstract:

    In this work, two natural sources, including pomegranate peel extract and Cochineal dye were employed for the synthesis of silver nanoparticles. The natural silver complex from pomegranate peel extract resulted in nano-sized structures through solution-phase method, but this method was not efficient for Cochineal dye-silver precursor and the as-formed products were highly agglomerated. Therefore, an alternative facile solid-state approach was investigated as for both natural precursors and the results showed successful production of well-dispersed nanoparticles with narrow size distribution for Cochineal dye-silver precursor. The products were characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Energy dispersive X-ray microanalysis (EDX), and Transmission Electron Microscopy (TEM).

  • novel and solvent free Cochineal assisted synthesis of ag al2o3 nanocomposites via solid state thermal decomposition route characterization and photocatalytic activity assessment
    Journal of Materials Science: Materials in Electronics, 2016
    Co-Authors: Mojgan Goudarzi, Zabihullah Zarghami, Masoud Salavatiniasari
    Abstract:

    Herein, silver–alumina nanocomposites have been synthesized via simple, novel, solvent-free and template-less solid-state thermal decomposition using Cochineal powder as novel starting reagent for the first time. AgNO3 and Al(OH)3 were utilized as silver and aluminum source, respectively. The prepared Ag–Al2O3 nanostructures were characterized extensively by means of X-ray diffraction, energy-dispersive X-ray analysis, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy and UV–Vis spectroscopy. Effect of reaction time, temperature and Cochineal powder on morphology and particle size of prepared products was investigated. The results exhibited that in presence of Cochineal powder, as-prepared nanostructures show very high degree of purity and uniformity. In other words, because of remarkable antioxidant properties of Cochineal, it prevents silver nanoparticles from sintering and oxidizing. The silver–alumina nanocomposite were evaluated as photocatalyst for the Rhodamine B degradation using visible light irradiation and showed significant photocatalytic efficiency.

Elena Ibáñez - One of the best experts on this subject based on the ideXlab platform.

  • Natural dyes extraction from Cochineal (Dactylopius coccus). New extraction methods
    Food Chemistry, 2012
    Co-Authors: M.e. Borges, R.l. Tejera, L. Díaz, P. Esparza, Elena Ibáñez
    Abstract:

    Abstract Carminic acid is a natural colourant that can be obtained from the dried bodies of females of the Dactylopius coccus Costa insect species (Cochineal). Carminic acid is the main pigment that can be extracted from the Cochineal insect. Its main use is with cosmetics, foods and pharmaceutical applications and it can also have textile and plastic applications. The traditional extraction methods employed to obtain this dye involve several drawbacks, e.g. high extraction time, low selectivity and low extraction efficiency. Moreover, these conventional techniques need toxic solvents. In this work, new extraction methods have been studied in order to avoid the disadvantages mentioned above. Pressurised liquid extraction (PLE) and supercritical fluid extraction (SFE) techniques provide high selectivity and short extraction times.