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- W2981548755 abstract "We prepared $${text {SiO}}_{2}$$, $${text {Fe}}_{2}{text {O}}_{3}$$-$${text {SiO}}_{2}$$, and $${text {Dy}}_{2}{text {O}}_{3}$$-$${text {SiO}}_{2}$$ composites by an enhanced method and reported the result of their structural, optical and magnetic properties. In the x-ray diffraction results of the $${text {Fe}}_{2}{text {O}}_{3}$$-$${text {SiO}}_{2}$$, $${text {Fe}}_{2}{text {O}}_{3}$$ and the $${text {SiO}}_{2}$$ it is evident that these composites are crystallized in rhombohedral and trigonal structures, respectively. In the$${text {Dy}}_{2}{text {O}}_{3}$$-$${text {SiO}}_{2}$$ composite, $${text {SiO}}_{2}$$ transforms into a trigonal structure with the addition of Dy. The absorption bands belong to $${text {Fe}}_{2}{text {O}}_{3}$$, and $${text {Dy}}_{2}{text {O}}_{3}$$ were obtained using the Fourier transform infrared spectra. In ultraviolet–visible spectra, the photocatalytic properties of $${text {Fe}}_{2}{text {O}}_{3}$$-$${text {SiO}}_{2}$$ and $${text {Dy}}_{2}{text {O}}_{3}$$-$${text {SiO}}_{2}$$ were determined as a function of time at room temperature. Maximum transmittance change at 800 nm was 75% and 40% for composites $${text {Fe}}_{2}{text {O}}_{3}$$-$${text {SiO}}_{2}$$, and $${text {Dy}}_{2}{text {O}}_{3}$$-$${text {SiO}}_{2}$$, respectively. The photocatalytic property of $${text {Dy}}_{2}{text {O}}_{3}$$-$${text {SiO}}_{2}$$ composite increases gradually from short to long in the wavelength region where it exhibits a maximum value in the visible region. In magnetic measurements, a weak ferromagnetic behavior was observed in the $${text {Fe}}_{2}{text {O}}_{3}$$-$${text {SiO}}_{2}$$, while $${text {Dy}}_{2}{text {O}}_{3}$$-$${text {SiO}}_{2}$$ exhibited paramagnetic behavior as expected. The saturation and coercivity values for $${text {Fe}}_{2}{text {O}}_{3}$$-$${text {SiO}}_{2}$$ were found to be 0.15 $$hbox {Am}^2hbox {kg}^{-1}$$ and 40 mT, respectively." @default.
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- W2981548755 date "2019-10-23" @default.
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- W2981548755 title "Structural, Optical and Magnetic Properties of $$alpha $$-$${text {Fe}}_{2}{text {O}}_{3}$$-$${text {SiO}}_{2}$$ and $${text {Dy}}_{2}{text {O}}_{3}$$-$${text {SiO}}_{2}$$ Composites Produced by a Facile Method" @default.
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- W2981548755 doi "https://doi.org/10.1007/s11664-019-07718-1" @default.
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