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Xiaoying Chang,Jikang Jian,Gemei Cai,Rong Wu,Jin Li 대한금속·재료학회 2016 ELECTRONIC MATERIALS LETTERS Vol.12 No.2
Three-dimensional FeSe2 microflowers were synthesized for the firsttime by a facile solvothermal method, using FeCl2·4H2O and seleniumpowder as raw materials, along with ethanolamine as solvent. Theproducts were characterized by X-ray diffraction (XRD), scanningelectron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS),transmission electron microscopy (TEM), and X-ray photoelectronspectroscopy (XPS). The results show that the FeSe2 microflowersconsist of nanosheets with a thickness of about 50 - 80 nm. The Ramanspectrum shows the characteristic peaks of Se-Se vibration modes. Theoptical band gap of the sample was determined to be 1.48 eV by UVvisibleabsorption spectroscopy. The photoluminescence properties ofthe FeSe2 microflowers and their catalytic activity for the hydrogenevolution reaction were also assessed. Finally, a possible growthmechanism of the FeSe2 microflowers is proposed.