Preparation and Photoluminescence of Mesoporous ZrO2/(1-n)SiO2-nAl2O3 Nanocomposites

Abstract

Abstract: (1-n)SiO₂-nAl₂O₃ (n=0, 0.01, 0.1) aerogels were prepared by using a sol-gel route and followed by the supercritical drying technique. Nano-ZrO₂ precipitates
were introduced into the pores of the aerogels. Photoluminescence of the ZrO₂/(1-n)SiO₂-nAl₂O₃ nanocomposites was measured. The results show that the luminescence
peak at about 540nm (2.30eV) for nano-ZrO₂ bulk sample shifts to 400nm (3.10eV) (blue shift) for ZrO₂/(1-n)SiO₂-nAl₂O₃ nanocomposites, when the excitation
wavelength is 316nm (3.92eV) at room temperature. The blue shift is about 140nm. The relative intensities of the luminescence peak change with the doping amount of the
nano-Al₂O₃. Mechanism of change of the luminescence peak in the visible region was proposed.

Key words: nanocomposite, aerogel, photoluminescence

CLC Number:

TB323

YAO Lian--Zeng,MO Ji-Mei,LI Yuang-Hong,CAI Wei-Li,. Preparation and Photoluminescence of Mesoporous ZrO₂/(1-n)SiO₂-nAl₂O₃ Nanocomposites[J]. Journal of Inorganic Materials.

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Preparation and Photoluminescence of Mesoporous ZrO₂/(1-n)SiO₂-nAl₂O₃ Nanocomposites

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