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    Wyświetlanie 1-3 z 3
    Tytuł:
    Annealing effect on nickel oxide nanoparticles synthesized by sol-gel method
    Autorzy:
    Kavitha, B.
    Nirmala, M.
    Pavithra, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1189956.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Nickel Oxide nanoparticles
    XRD
    SEM
    TGA-DTA
    Opis:
    NiO nanoparticles were synthesized by Sol-Gel method and the synthesized nanoparticles were annealed at different temperatures. The powders were investigated with x-ray diffraction, scanning electron microscopy and TGA. The structural characterization was carried out by x-ray diffraction which confirms the polycrystalline nature of the films with a cubic structure. SEM analysis of the films enabled the conclusion that the prepared films are uniform, rough, large crystals and agglomeration of particles were observed. The thermal stability of the sample was examined by TGA analysis which showed NiO nanoparticles formed between 130-720 C.
    Źródło:
    World Scientific News; 2016, 52; 118-129
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Green Synthesis of Copper Nanoparticles Using Ocimum sanctum L. (Tulsi) and Piper nigrum L. (Pepper Seed) for Pollution Free Environment
    Autorzy:
    Nirmala, M.
    Kavitha, B.
    Nasreen, S.
    Kiruthika, S.
    Divya, B.
    Manochitra, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031782.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Copper
    Copper nano particles
    Cu
    Diffraction
    Green synthesis
    Ocimum sanctum
    Pepper
    Piper nigrum
    Tulsi
    Opis:
    Synthesis of nanoparticles using plant leaf extract is an eco-friendly, non-toxic and cost efficient approach in the field of nanotechnology. In this study, biosynthesis of stable copper nanoparticles were prepared by using Ocimum sanctum and Piper nigrum extract. These biosynthesized Cu nanoparticles were characterized with the help of X-Ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Fourier transforms infrared spectroscopy (FTIR). The crystalline size of the Copper Nanoparticles prepared from Tulsi extract is little smaller than Copper nanoparticles prepared from Pepper extract. SEM images of Copper nanoparticles showed that the cluster formation, presence of smaller and larger grains. FTIR analysis revealed that the functional groups present in the Copper nanoparticles prepared from both Tulsi and Pepper extracts. Thus, this method can be used for rapid and ecofriendly biosynthesis of stable copper nanoparticles and can be used for catalytic agent, anti-microbial, anti-fungal, anti-biotic, nanosensor, super conducting material, solar cell applications.
    Źródło:
    World Scientific News; 2020, 150; 105-117
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabrication of Dye Sensitized Solar Cell Based on Natural Photosensitizers
    Autorzy:
    Nirmala, M.
    Sahana, S.
    Iswarya, B.
    Maruvarasi, K.
    Jenita, A. Adline
    Kavitha, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031877.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Efficiency
    FTIR spectroscopy
    Functional
    Natural Dyes
    Solar cell
    nanocrystalline materials
    nanocrytalline titanium dioxide
    Opis:
    Dye Sensitized solar cells were fabricated using with natural extracts and TiO2 is used as a semiconducting layer. The layer of nanocrytalline titanium dioxide was deposited on conductive side of the transparent Fluorine doped Tin Oxide (FTO) glass plate and the other side of the plate is coated with graphite. Voltage and Current values are measured for natural dyes coated FTO plate and I-V characteristic curves of all fabricated cells were drawn and analyzed. The highest power conversion efficiencies of Blueberry (0.79872%) and Beetroot (0.745813 %.) dyes were achieved among 10 dyes. The functional groups of Beetroot and Turmeric natural dyes were confirmed under FTIR spectroscopy. The ease and cost efficiency of the overall fabrication process, extensive availability of these fruits/juices render them novel and low-cost candidates for Solar cell applications.
    Źródło:
    World Scientific News; 2020, 149; 128-139
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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