Journal of Materials Science

, Volume 51, Issue 14, pp 6801–6811 | Cite as

Luminescent properties and sensing performance of a carbon quantum dot encapsulated mesoporous silica/polyacrylonitrile electrospun nanofibrous membrane

  • Shouzhu Li
  • Shenghai Zhou
  • Hongbo Xu
  • Lili Xiao
  • Yi Wang
  • Hangjia Shen
  • Huanhuan Wang
  • Qunhui Yuan
Original Paper


A novel turn-off and label-free fluorescent sensor based on a carbon quantum dot encapsulated mesoporous silica/polyacrylonitrile (CDs/mesoSiO2/PAN) electrospun nanofibrous membrane for the determination of Fe(III) was evaluated. Compared with that of the free-state CDs, the fluorescent behavior of the embedded CDs was altered because of the involvement of mesoSiO2/PAN electrospun nanofibers as a supporting matrix. On the basis of previously reported understandings, the photoluminescent (PL) mechanism of the CDs had been further studied. It is evident that the fixed blue emission of CDs occurs from the carbon defect states, whereas the excitation-dependent emission at longer wavelengths is related to confinement effects of the CDs. Moreover, compared with the free-state CDs, the CDs/mesoSiO2/PAN nanofibrous membrane exhibits a more stable PL signal, improved anti-photobleaching performance, and better pH adaptability because of the possible hydrogen bonding between the SiOH groups in nanofibers and the surface oxygen-containing groups of the CDs, which create an adequate chemical environment for the preservation of the carbon defect states in luminescence generation as well as the active sites for Fe(III) binding. Applying the CDs/mesoSiO2/PAN membrane for the determination of Fe(III) in tap water samples indicates that it can work efficiently as a PL sensor.


Nanofibrous Membrane Electrospun Nanofibrous Membrane Composite Nanofibrous Membrane Initial Water Contact Angle Electrospun Nanofiber Membrane 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The authors acknowledge financial support from the ‘One Hundred Talents Project Foundation Program’ and the ‘Western Light Program’ of the Chinese Academy of Sciences, the National Natural Science Foundation of China (21303259, 21203244 and 21473247), the ‘Young Creative Sci-Tech Talents Cultivation Project (2013711012)’, and the ‘International Science and Technology Cooperation Project (20136006)’ of the Xinjiang Uyghur Autonomous Region.


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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Shouzhu Li
    • 1
  • Shenghai Zhou
    • 1
  • Hongbo Xu
    • 1
    • 2
  • Lili Xiao
    • 1
    • 2
  • Yi Wang
    • 1
    • 2
  • Hangjia Shen
    • 1
  • Huanhuan Wang
    • 1
  • Qunhui Yuan
    • 1
  1. 1.Laboratory of Environmental Science and Technology, Xinjiang Technical Institute of Physics & Chemistry, Key Laboratory of Functional Materials and Devices for Special EnvironmentsChinese Academy of SciencesUrumqiChina
  2. 2.University of Chinese Academy of SciencesBeijingChina

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