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Abstract: Different morphologies of nanostructured bismuth sulfide (Bi2S3) including nanotubes and nanorods have been prepared by solvothermal synthesis at a low temperature of 120 °C for 12 h using various mixed solvents as the reaction medium and urea as the mineralizer. X-ray diffraction analysis showed that all the as-prepared Bi2S3 samples are orthorhombic phase. Transmission electron microscopy analysis showed that the morphologies of the nanostructures are mainly related to the viscosity and surface tension of the mixed solvent used in the solvothermal synthesis. [Copyright &y& Elsevier]

Abstract: Novel nitrogen-doped Bi2WO6 (N-BWO) powders were synthesized by an ethylenediamine-assisted hydrothermal method. The obtained results indicated that the N-BWO powders are composed of microstructures self-assembled from single-crystalline nanosheets. The doped nitrogen was substituted for oxygen in the crystal lattice of Bi2WO6, causing a red shift (from 2.82 to 2.63eV) for N-BWO powders compared to pure BWO. The as-synthesized N-BWO powders exhibited an efficient visible light-induced photocatalytic activity toward the degradation of Rhodamine B (RhB) in aqueous solution due to their enhanced visible light absorption and special layered microstructures. [Copyright &y& Elsevier]