4.7 Article

Luminescent properties and energy transfer of luminescent carbon dots assembled mesoporous Al2O3: Eu3+ co-doped materials for temperature sensing

Journal

JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 496, Issue -, Pages 8-15

Publisher

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2017.02.013

Keywords

Luminescent carbon dots; Mesoporous aluminas; Temperature sensing

Funding

  1. National Natural Science Foundations of China [51203053, 21571067]
  2. Guangzhou Science & Technology Project [201605112017209]
  3. Project for Construction of High-level University in Guangdong Province
  4. Guangdong Natural Science Foundation [S2013030012842]

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Owning to the hydrogen-band interactions, blue-light-emitting luminescent carbon dots (CDs) synthesized by one-pot hydrothermal treatment were successfully assembled into Eu3+ doped mesoporous aluminas (MAs). Interesting, dual-emissive CDs/MAs co-doped materials with higher quantum yield (QY), long-term stability, mesoporous structure, high thermal stability, and large surface areas were obtained. Furthermore, the obtained CDs/MAs co-doped materials possessed tunable color, and excellent temperature sensitivity due to the existing of energy transfer between CDs and Eu3+ ion. The energy transfer efficiency (eta) and energy transfer probability (P) for CDs/Eu3+ co-doped materials possessed a monotonous tendency with the change of Eu3+ content. More importantly, the dual-emissive colors can be regularly adjusted through regulating their excitation wavelength or relative mass ratio. In addition, the emission intensity of the CDs/MAs co-doped materials gradually decreased with increasing temperature showing the clear temperature dependence, this dual-emissive thermometer was with high sensitivity, owning a great fitted curve in the range from 100 to 360 K under a single wavelength excitation. (C) 2017 Elsevier Inc. All rights reserved.

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