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A facile procedure, involving one-pot synthesis of CeVO4/BiVO4 and in-situ reduction of graphene oxide (GO), has been used to prepare CeVO4/BiVO4/rGO nanocomposites. Different ratios of the CeVO4–BiVO4 were prepared to afford composites represented as CBVG3, CBVG5, and CBVG7. The ternary nanocomposite materials were characterized by using powder X-ray diffractometer (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), photoluminescence and UV–vis spectroscopic techniques. Photocatalytic efficiency of the as-prepared ternary nanocomposites was investigated through the photo degradation of methyl orange under a visible light irradiation at 470 nm. The photocatalytic performance was enhanced by loading the CeVO4/BiVO4 nanoparticles on reduced graphene oxide (rGO), given MO degradation rate of 57, 65, 80, and 90% for BVG, CBVG3, CBVG5, and CBVG7, respectively after exposure to visible light for 120 min. Effects of experimental process parameters including initial dye concentration, catalysts loading and effect of different modification regimes were studied using CBVG7, which exhibited the highest efficiency. The improvement in the photocatalytic efficiency may be attributed to increased surface area of the nanocomposites, enhanced light absorption capacity and improved charge separation. The study showed a one-pot synthesis route to prepare promising CeVO4/BiVO4/GO nanocomposites for the photo-enhanced degradation of dye contaminants.

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The effect of using different solvothermal approaches, involving heat‐up and hot‐injection routes, on the phase, morphology and optical properties of tin sulfide nanoparticles using novel dibutyltin(IV) p‐methylphenyl dithiocarbamate as single source precursor compound have been studied. Dibutyltin(IV) p‐methylphenyldithiocarbamate was synthesized and characterized using various spectroscopic techniques (FT‐IR, 1H, 13C and 119Sn), and elemental analysis. TG analysis, studied under nitrogen, revealed tin sulfide of the rare mixed‐valence binary phase (Sn2S3) as the final residue at the end of the decomposition process. The samples presented as SnS1 and SnS2 obtained by the heat‐up and hot injection routes respectively, at 220 °C and in the presence of oleylamine as surfactant, revealed the α‐cubic phase of SnS with Herzenbergite structure. The X‐ray diffraction analysis of the nanoparticles also revealed patterns which showed preferred growth along (111) orientation; hence, favoring anisotropic shapes which were more distinct at higher magnification images of the TEM as a pseudo spherical morphology tending toward the formation of short rods. The optical property of the nanoparticles exhibited a blue shift in the bandgap energy with respect to the bulk, which is an evidence of quantum confinement effect.  相似文献   
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