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Preparation and up-conversion fluorescence of rare earth (Er3+ or Yb3+/Er3+)-doped TiO2 nanobelts

✍ Scribed by Tianhao Ji; Yang Liu; Hui Zhao; Haiyan Du; Jiayue Sun; Guanglu Ge

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
694 KB
Volume
183
Category
Article
ISSN
0022-4596

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✦ Synopsis

Anatase TiO 2 nanobelts doped with rare earth (RE) ions Yb 3 + , Er 3 + or Yb 3 + /Er 3 + have been prepared using layered titanate nanobelts (LTO NBs) with RE ions as the precursor obtained by ion-exchange between LTO NBs and RE ions under hydrothermal process. Various measurement results demonstrate that the RE ions have doped into the lattice of TiO 2 , and the Er 3 + or Yb 3 + /Er 3 + doped nanobelts show strong visible up-conversion (UC) fluorescence under 980 nm excitation. The UC emission intensity of LTO NBs embedded with Er 3 + or Yb 3 + /Er 3 + is slightly higher than that of the corresponding TiO 2 nanobelts doped with RE ions, whereas higher RE doping content leads to the decrease of UC emission intensity due to the concentration-quenching effect.

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