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Ru/CeO_2[RC] and Ru/CeO_2/ethylene glycol(EG) [RCE] nanoparticles were produced by performing a simple hydrothermal reaction at 200℃ for 24 h and found to have two distinct morphologies. The RC nanoparticles are phase pureCeO_2; triangular highly crystallineCeCO_3OH nanoparticles are formed from the solution containing EG under the same hydrothermal reaction conditions at p H 8.5. EG plays an important role in the formation of the triangularCeCO_3OH nanoparticles. The polycrystallineCeCO_3OH nanoparticles retain their triangular structure even after calcination at 600℃in air but are transformed into a pureCeO_2 phase. The room temperature photoluminescence of the RC and RCE nanoparticles and of RCE calcined at 600℃[RCE-600] was also investigated. It was found that the high crystallinity triangular RCE-600 sample exhibits the highest photoluminescence intensity.
Ru / CeO 2 [RC] and Ru / CeO 2 / ethylene glycol (EG) [RCE] nanoparticles were produced by performing a simple hydrothermal reaction at 200 ℃ for 24 h and found to have two distinct morphologies. The RC nanoparticles are phase pure CeO 2; highly crystalline Cee_3O nanoparticles are formed from the solution containing EG under the same hydrothermal reaction conditions at pH 8.5. EG plays an important role in the formation of the triangular Cee_3OH nanoparticles. The polycrystalline Cee_3OH nanoparticles retain their triangular structure even after calcination at 600 ° C in air but are was transformed into a pureCeO 2 phase. The room temperature photoluminescence of the RC and RCE nanoparticles and RCE calcined at 600 ° C [RCE-600] was also investigated. It was found that the high crystallinity triangular RCE-600 sample exhibits the highest photoluminescence intensity .