Simple Solvothermal Preparation of Germanium Oxide Particles and Their Luminescent Characterizations
In order to study the morphology evolution of germanium oxide particles under different conditions,α-quartz phase germanium oxide was used as the germanium source by simple solvothermal synthesis,and spindle and cubic micro-nano structures with regular morphology were prepared through those approaches by selecting ethylene glycol and citric ac-id as the water phase(heating at 180-220℃for 12-32 h),and PEG4000 as the oil phase,pure water with pH=1.0 as the water phase(heating at 140-180℃for 2-48 h).By scanning electron microscopy,raman spectroscopy and photolumines-cence spectroscopy characterization,it was revealed that size and morphology of the prepared germanium oxide micro-nano particles with an α-quartz phase structure had a significant impact on its raman vibration mode.The morphology evolution and the formation mechanism of the spindle-cube formed the BFDH-HP mechanism.Under the 532 nm excitation light source,the luminescence center of germanium oxide particles was observed at the range of 606～648 nm(orange-red),and the movement of the luminescence center can be ascribe to surface defects of germanium oxide.
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