Hydrothermal Synthesis of Cubic Mesocrystal CeO2 for Visible Photocatalytic Degradation of Rhodamine B

Hexiang Yang; Mengkai Zhou; Zeda Meng; Lei Zhu; Zhigang Chen; Won-Chun Oh

Korean Journal of Materials Research, Vol.25, No.3, 144-148, March, 2015

DOI10.3740/MRSK.2015.25.3.144 Export Citation

Hydrothermal Synthesis of Cubic Mesocrystal CeO2 for Visible Photocatalytic Degradation of Rhodamine B

Hexiang Yang¹, Mengkai Zhou¹, Zeda Meng², Lei Zhu³, Zhigang Chen^{1, 2, †}, and Won-Chun Oh^{3, †}

¹School of Material Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
²School of Chemistry, Biology and Materials Engineering, Suzhou University of Science and Technology, Suzhou 215009, China
³Department of Advanved Materials Science and Engineering, Hanseo University, Seosan-si, Chungnam-do 356-706, Korea

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Cubic mesocrystal CeO2 was synthesized via a hydrothermal method with glutamic acid (C5H9NO4) 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 CeO2 compared to commercial CeO2 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 (≥ 380 nm). The decoloring rate can exceed 100% after 300 min.

Keywords:mesocrystal;CeO2;visible photocatalyt;organic dye degradation

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[2] Karunakaran C, Gomathisankar P, ACS Sustainable Chem. Eng., 1, 1555 (2013)

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[6] Qian J, Chen Z, Liu C, Lu X, Wang F, Wang M, Mater. Sci. Semicond. Process, 25, 27 (2014)

[7] Lu XW, Li XZ, Qian JC, Chen ZG, Powder Technol., 239, 415 (2013)

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[19] Li XZ, Ni CY, Chen F, Lu XW, Chen ZG, J. Solid State Chem., 182, 2185 (2009)

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