Pure cubic nanocrystalline barium stannate was synthesized by new simple coprecipitation strategies that employed tin (II) chloride and [bis(salicylaldehydato) barium (II)] as tin and barium sources in presence of tetramethylethylenediamine (TMED) as a novel precipitating agent. This work is the first successful attempt for the preparation of nanostructured barium stannate by utilizing TMED via a facile coprecipitation way in presence of tin (II) chloride and [bis(salicylaldehydato) barium (II)]. The structural, optical and morphological characteristics of the as-prepared nanostructured barium stannate were studied by UV-vis diffuse reflectance spectroscopy, transmission electron microscopy, X-ray diffraction, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy and energy dispersive X-ray microanalysis (EDX). According to the SEM results, it was found that shape and size of the barium stannate can be dramatically controlled by setting critical preparation factors such as the barium source, precipitating agent type, reaction pH, surfactant type and dosage of surfactant. The photocatalytic characteristics of as-obtained nanocrystalline barium stannate were also examined by degradation of erythrosine dye as water contaminant.
In this work, nanocubes of CaSnO3 have been prepared by a simple and green co-precipitation method. In this technique, for preparation of calcium stannate, we have used from a complex structure of calcium as a new precursor and the synthesis of CaSnO3 have been done in water as a green solvent. Using of complexing precursors were created a congestion in reaction medium. Different conditions have been studied in synthetic approaches and optimized the effect of different parameters on the morphology of product such as precipitation agent (alkaline), pH, temperature, the rate of stirrer, surfactants and the mole ratio of surfactants for preparation product and obtaine the best product in terms of quality and morphology. By using of this CaSnO3, two types of azo dyes (acid blue 92 and acid brown 14) have been degraded at presence of ultraviolet light from aqueous solution. Results display that the powder shows appropriate catalytic behavior for degradation of dyes (77% acid brown 14 and 67% acid black 92). Therefore these nano-cube structures have been used as photocatalysts in presence of UV light for degradation of azo dyes.
NaY(WO4)2 nanoparticles were fabricated via a simple hydrothermal method using saccharide carbohydrates as capping agents. The photocatalytic behavior of the as-prepared NaY(WO4)2 nanostructures was studied.
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