Machinery & Energetics

COMPOSITES BASED ON MICROCRYSTALLINE CELLULOSE AND LUMINESCENT OXIDES: PROPERTIES AND A WAY OF APPLICATION

Volodymyr Boyko, Vitalii Chornii, V. A. Barbash , O. V. Yashchenko , O. M. Alekseev , Yu. Ye. Hrabovskyi , Serhii Nedilko, E. Reznichenko , V. P. Shcherbatskyi , M. S. Nedielko
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Abstract

The results of luminescent spectroscopic studies of composites that consist of microcrystalline cellulose and oxide s– gNO3, K2Eu(PO4)(MoO4) and LaVO4:Sm are reported. It was established the luminescence properties of cellulose are dependent on type of plant raw materials as well as on processing methods. These factors have influence on luminescence intensity but profile of photoluminescence (PL) bands remains practically unchanged. A maximum of non-elementary PL band is located near 490 nm for case of excitation at 405 nm. Composites with argentums nitrate revealed similar shape of PL band with maximum at 490 nm but with more intensive short-wavelength side of the band. Under excitation in 33–532 nm spectral region the composites that contain K2Eu(PO4)(MoO4)) and LaVO4:Sm are characterized by intensive visible photoluminescence. Spectra of these PL depend on excitation wavelength. It is shown the combination of luminescent coating “microcrystalline cellulose” + K2Eu(PO4)(MoO4) and commercial light emitting diode with λem = 455 nm allow to obtain bluish white light (chromaticity coordinates are x = 0.262; y = 0.224).

Keywords

microcrystalline cellulose, luminescence, oxide, rare-earth ion

Suggested citation
Boyko, V., Chornii, V., V. A. Barbash, O. V. Yashchenko, O. M. Alekseev, Yu. Ye. Hrabovskyi, Nedilko, S., E. Reznichenko, V. P. Shcherbatskyi, & M. S. Nedielko (2018). COMPOSITES BASED ON MICROCRYSTALLINE CELLULOSE AND LUMINESCENT OXIDES: PROPERTIES AND A WAY OF APPLICATION. Machinery & Energetics, (283), 301-310.
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