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Wyszukujesz frazę "Microwave irradiation" wg kryterium: Wszystkie pola


Wyświetlanie 1-2 z 2
Tytuł:
Microwave Irradiation Effect on Structural, Optical, and Thermal Properties of Cadmium Oxide Nanostructure
Autorzy:
Rajesh, N.
Kannan, J.
Krishnakumar, T.
Neri, G.
Powiązania:
https://bibliotekanauki.pl/articles/1198664.pdf
Data publikacji:
2014-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.07.-b
68.37.Lp
78.67.-n
81.70.Jb
Opis:
Cadmium oxide nanostructures were prepared by microwave assisted wet chemical technique at different time intervals. Results on structural, optical, and thermal properties of the CdO nanostructures as a function of the microwave irradiation were reported. The X-ray diffraction data indicates that the sample showed perfection in the microstructural improvement as a function of microwave irradiation. Surface morphological changes with different time of microwave irradiation were recorded by transmission electron microscope and the particle size were found in the ranges from 5 to 30 nm. Chemical composition and thermal stability of the samples were analyzed by energy dispersive X-ray spectrum and thermogravimetric analysis, respectively. The band gaps were shifted towards the blue region due to the Moss-Burstein effect and it exhibited direct band transitions, which corresponds to optical band gaps of 3.92-4.20 eV and contrast behavior of optical properties of CdO nanostructure in UV and IR regions were registered. Room temperature photoluminescence spectra revealed that the intensity of luminescent emission tends to decrease with the increase in exposure of microwave irradiation.
Źródło:
Acta Physica Polonica A; 2014, 125, 5; 1229-1235
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microwave Assisted Fast Synthesis of CuO Nanoflakes: Catalytic Application in the Synthesis of 1,4-Dihydropyridine
Autorzy:
Bajaj, S.
Tekade, P.
Lakhotiya, G.
Borkar, P.
Powiązania:
https://bibliotekanauki.pl/articles/1032600.pdf
Data publikacji:
2017-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
microwave irradiation
CuO nanoflakes
catalyst
dihydropyridine
Opis:
CuO nanoflakes were successfully synthesized by microwave irradiation, using copper(II) sulphate and sodium hydroxide (NaOH) as the starting materials and ethanol as the solvent. The CuO nanoflakes were characterized by using techniques such as X-ray powder diffraction, field emission scanning electron microscopy, and UV-visible absorption spectroscopy, Fourier transform infra-red spectroscopy. The synthesized CuO nanoflakes were found to have morphology like nanoflakes with narrow size distribution and high purity. Moreover, the synthesized CuO nanoflakes were used as an efficient catalyst for synthesis of a series of dihydropyridine derivatives. Optimization studies with different catalysts and solvents reveal that CuO nanoparticle in the water/ethanol mixture is efficient catalyst/solvent system for the synthesis of dihydropyridine derivative.
Źródło:
Acta Physica Polonica A; 2017, 132, 4; 1294-1300
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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