An effective L-cysteine-assisted synthetic route has been successfully developed to prepare copper gallium sulfide(CuGaS2) microspheres under solvothermal conditions with CuCl2·2H2O,GaCl3 and L-cysteine as source materials,in which L-cysteine was used as the sulfide source and complexing molecule.The experiments revealed that the synthesized sample was of a typical CuGaS2 tetragonal structure.Moreover,the prepared CuGaS2 crystals consisting of microspheres made up of nanoflakes,and the diameter of the nanoflakes was about 20 nm.Raman spectrum of the obtained CuGaS2 exhibits a high-intensity peak of the A1 mode at 306 cm-1.Meanwhile,a possible growth mechanism was proposed based on the investigations.
A simple biomolecule-assisted synthetic route has been successfully developed to prepare bismuth sulfide(Bi 2 S 3 ) nanorods under solvothermal conditions.In the synthetic system,pentahydrate bismuth nitrate was employed to supply Bi source and L-cystine was used as sulfide source and complexing agent.The morphology,structure,and phase composition of the as-prepared Bi 2 S 3 products were characterized by X-ray diffraction(XRD),energy dispersion spectroscopy(EDS),X-ray photoelectron spectroscopy(XPS),field-emission scanning electron microscopy(FESEM),transmission electron microscopy(TEM),selected area electron diffraction(SAED),and high-resolution transmission electron microscopy(HRTEM).The experimental results show that the nanorods have uniform diameter of 100-200 nm and length of 2-4 μm.The possible formation mechanism for the bismuth sulfide nanorods was discussed.
