Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Hydrothermal Synthesis of Cubic Mesocrystal CeO2 for Visible Photocatalytic Degradation of Rhodamine B

  • Yang, Hexiang (School of Material Science and Engineering, Jiangsu University) ;
  • Zhou, Mengkai (School of Material Science and Engineering, Jiangsu University) ;
  • Meng, Zeda (School of Chemistry, Biology and Materials Engineering, Suzhou University of Science and Technology) ;
  • Zhu, Lei (Department of Advanved Materials Science and Engineering, Hanseo University) ;
  • Chen, Zhigang (School of Material Science and Engineering, Jiangsu University) ;
  • Oh, Won-Chun (Department of Advanved Materials Science and Engineering, Hanseo University)
  • Received : 2015.02.03
  • Accepted : 2015.03.05
  • Published : 2015.03.27
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Abstract

Cubic mesocrystal $CeO_2$ was synthesized via a hydrothermal method with glutamic acid ($C_5H_9NO_4$) as a template. The XRD pattern of a calcined sample shows the face-centered cubic fluorite structure of ceria. Transmission electron microscopy (TEM) and the selected-area electron diffraction (SAED) pattern revealed that the submicron cubic mesocrystals were composed of many small crystals attached to each other with the same orientation. The UV-visible adsorption spectrum exhibited the red-shift phenomenon of mesocrystal $CeO_2$ compared to commercial $CeO_2$ particles; thus, the prepared materials show tremendous potential to degrade organic dyes under visible light illumination. With a concentration of a rhodamine B solution of 20 mg/L and a catalyst amount of 0.1 g/L, the reaction showed higher photocatalytic performance following irradiation with a xenon lamp (${\geq}380nm$). The decoloring rate can exceed 100% after 300 min.

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References

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