Abstract
Spherical yttrium gallium garnet (Y3Ga5O12) samples were prepared by a single-step hydrothermal synthesis method, and these particles were coated with silver oxide (Ag2O) nanoparticles by following a facile wet chemical approach at ambient temperature. The structural, morphological, vibrational and optical properties of the as-prepared and Ag2O modified Y3Ga5O12 samples were analyzed. From Rietveld refinement of X-ray diffraction patterns, the crystal structure of the Y3Ga5O12 sample was refined. The morphological properties confirmed that the particles were spherical and their surfaces were covered with Ag2O nanoparticles. The Ag2O modified Y3Ga5O12 sample exhibited a relatively enhanced photocatalytic activity compared to the pure Y3Ga5O12 sample in Rhodamine B solution, suggesting that the introduction of Ag2O broadens the absorption of light and controls the photogenerated carrier recombination in Y3Ga5O12. These results provide a clear perspective on the synthesis of hybrid photocatalyst materials which have several ways of photogenerated carrier migration.
Highlights
Catalysis dates back to 19th century when a German researcher studied the effect of illumination of ZnO on the bleaching of Prussian blue.[1]
The increasing environmental and energy issues in the present day world provoke researchers to synthesize new photocatalytic materials which can effectively degrade the pollutants under light irradiation
To enhance the photocatalytic activity, the Y3Ga5O12 garnet (YGG) nanoparticles were modified by Ag2O and the photocatalysis was performed using Rhodamine B (RhB) as an organic dye pollutant
Summary
Catalysis dates back to 19th century when a German researcher studied the effect of illumination of ZnO on the bleaching of Prussian blue.[1]. Silver dioxide (Ag2O) has a wide range of applications in several industrial fields, as an electrode material, cleaning agent, preservative, colorant, and catalyst. It has a cubic structure with a = 4.72 Å and a reported band gap of approximately 1.2 eV. Tion of organic dyes depends, to some extent, on Ga doping In this context, we attempt to synthesize ternary compound Y3Ga5O12 garnet (YGG) samples. To enhance the photocatalytic activity, the YGG nanoparticles were modified by Ag2O and the photocatalysis was performed using Rhodamine B (RhB) as an organic dye pollutant
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