In this work, hexagonal solid solutions of (Gd 0.95 Eu 0.05 )(OH) 3 with two distinctive morphologies of nanorods and nanotubes were successfully synthesized via hydrothermal treatment of mixed nitrate solutions in the presence of ammonium hydroxide. The hydroxide samples exhibited characteristic Eu 3+ photoluminescence through the energy transfer from Gd 3+ to Eu 3+ and the self-excitation of Eu 3+ . The hydroxide precursors transformed into cubic (Gd 0.95 Eu 0.05 ) 2 O 3 at ~500 °C via an intermediate monoclinic (Gd 0.95 Eu 0.05 )OOH phase, and the Eu 3+ coordination accordingly experienced symmetry changes from D 3 h to C 2 v , and then to C 2 / S 6 . The cubic (Gd 0.95 Eu 0.05 ) 2 O 3 well retained the original morphologies of their p...
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics