Hydrothermal Synthesis of Various Shape-Controlled Europium Hydroxides

Hongjuan Zheng; Kongjun Zhu; Ayumu Onda; Kazumichi Yanagisawa

doi:10.3390/nano11020529

Hydrothermal Synthesis of Various Shape-Controlled Europium Hydroxides

Nanomaterials (Basel). 2021 Feb 19;11(2):529. doi: 10.3390/nano11020529.

Authors

Hongjuan Zheng¹, Kongjun Zhu¹, Ayumu Onda², Kazumichi Yanagisawa²

Affiliations

¹ State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
² Research Laboratory of Hydrothermal Chemistry, Faculty of Science, Kochi University, Kochi 780-8520, Japan.

Abstract

Eu(OH)₃ with various shape-controlled morphologies and size, such as plate, rod, tube, prism and nanoparticles was successfully synthesized through simple hydrothermal reactions. The products were characterized by XRD (X-Ray Powder Diffraction), FE-SEM (Field Emission- Scanning Electron Microscopy) and TG (Thermogravimetry). The influence of the initial pH value of the starting solution and reaction temperature on the crystalline phase and morphology of the hydrothermal products was investigated. A possible formation process to control morphologies and size of europium products by changing the hydrothermal temperature and initial pH value of the starting solution was proposed.

Keywords: europium hydroxides; hydrothermal; morphology control; nanoparticles; rare earth.