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.

1. Introduction
 2. Experiment Section
 3. Results and Discussion
 4. Conclusion
 Acknowledgements
 References

• Won-Chun Oh(Department of Advanved Materials Science and Engineering, Hanseo University, Seosan-si, Chungnam-do 356-706, Korea) Corresponding author
• Zhigang Chen(School of Material Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China, School of Chemistry, Biology and Materials Engineering, Suzhou University of Science and Technology, Suzhou 215009, China) Corresponding author
• Lei Zhu(Department of Advanved Materials Science and Engineering, Hanseo University, Seosan-si, Chungnam-do 356-706, Korea)
• Zeda Meng(School of Chemistry, Biology and Materials Engineering, Suzhou University of Science and Technology, Suzhou 215009, China)
• Mengkai Zhou(School of Material Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China)
• Hexiang Yang(School of Material Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China)