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Three-dimensional FeSe2 microflowers assembled by nanosheets: Synthesis, optical properties, and catalytic activity for the hydrogen evolution reaction

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Abstract

Three-dimensional FeSe2 microflowers were synthesized for the first time by a facile solvothermal method, using FeCl2·4H2O and selenium powder as raw materials, along with ethanolamine as solvent. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The results show that the FeSe2 microflowers consist of nanosheets with a thickness of about 50 – 80 nm. The Raman spectrum shows the characteristic peaks of Se-Se vibration modes. The optical band gap of the sample was determined to be 1.48 eV by UV-visible absorption spectroscopy. The photoluminescence properties of the FeSe2 microflowers and their catalytic activity for the hydrogen evolution reaction were also assessed. Finally, a possible growth mechanism of the FeSe2 microflowers is proposed.

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Authors and Affiliations

  1. School of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou, 510006, China

    Xiaoying Chang & Jikang Jian

  2. School of Materials Science and Engineering, Central South University, Changsha, 410083, China

    Gemei Cai

  3. Department of Physics, Xinjiang University, Urumqi, 830046, China

    Xiaoying Chang, Jikang Jian, Rong Wu & Jin Li

Authors
  1. Xiaoying Chang
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  2. Jikang Jian
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  3. Gemei Cai
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  4. Rong Wu
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  5. Jin Li
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Correspondence to Jikang Jian.

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Chang, X., Jian, J., Cai, G. et al. Three-dimensional FeSe2 microflowers assembled by nanosheets: Synthesis, optical properties, and catalytic activity for the hydrogen evolution reaction. Electron. Mater. Lett. 12, 237–242 (2016). https://doi.org/10.1007/s13391-016-5377-x

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  • DOI: https://doi.org/10.1007/s13391-016-5377-x

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