Abstract
Eu-doped Y2O3 coated diatomite nanostructures with variable Eu3+ contents were synthesized by a facile hydrothermal technique. The products were characterized by means of energy dispersive X-ray photoelectron spectroscopy (EDX), scanning electron microscopy (SEM), powder X-ray diffraction (PXRD), Brunauer–Emmett–Teller (BET), UV-vis diffuse reflectance spectroscopy, and photoluminescence spectroscopy techniques. As claimed by PXRD, the particles were crystallized excellently and attributed to the cubic phase of Y2O3. The influence of substitution of Eu3+ ions into Y2O3 lattice caused a redshift in the absorbance and a decrease in the bandgap of as-prepared coated compounds. The pore volume and BET specific surface area of Eu-doped Y2O3-coated diatomite is greater than uncoated biosilica. The sonophotocata-lytic activities of as-synthesized specimens were evaluated for the degradation of Reactive Blue 19. The effect of various specifications such as ultrasonic power, catalyst amount, and primary dye concentration was explored.
Highlights
Advanced oxidation processes (AOPs) have achieved a substantial research interest for decolorization of toxic organic pollutants in different wastewater
The diatomite powder X-ray diffraction (PXRD) pattern is indexed readily to SiO2 (JCPDS card no. 00-001-0647) whilst the four broad and strong peaks with attributed reflections (222), (400), (440), (622) and 2θ = 29.1, 33.7, 48.6, and 58.2◦ are related to the cubic structure of yttria, respectively (JCPDS card no. 41-1105) [42]
The indistinguishable forms of the PXRD patterns of the Y2O3 and the coated with EuxY2-xO3 compounds propose that the surface of the diatom is covered
Summary
Advanced oxidation processes (AOPs) have achieved a substantial research interest for decolorization of toxic organic pollutants in different wastewater. The main mechanism of AOPs is the generation of OH radicals which have greater oxidizing performance and led to attain faster and more effective decomposition of pollutants [1,2,3,4,5,6]. Y2O3 nanostructures were prepared through several processes such as the combustion method [27], hydrothermal method [28], laser vaporization [29], sol gel method2[o3f01]9and co-precipitation method [31], Precipitation method [32], and evaporation method [33] for various applications of thermoluminescence, photoluminescence imaging and luminesceDnicaeto. RB19 was acquired from the Zhejiang Yide Chemical Company (Hangzhouwan Industrial Park, Shangyu, China)
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