High‐Performance Oxygen Sensors Based on EuIII Complex/Polystyrene Composite Nanofibrous Membranes Prepared by Electrospinning |
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| Authors: | Dr Yinghui Wang Prof Bin Li Liming Zhang Qinghui Zuo Peng Li Dr Jun Zhang Prof Zhongmin Su |
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| Institution: | 1. Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033 (P. R. China), Fax: (+86)?431‐86176935;2. Graduate School of the Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100039 (P. R. China);3. Department of Chemistry, Northeast Normal University, Changchun 130024 (P. R. China) |
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| Abstract: | An optical oxygen sensor based on an EuIII complex/polystyrene (PS) composite nanofibrous membrane is prepared by electrospinning. The emission intensity of Eu(TTA)3(phencarz)] (TTA=2‐thenoyltrifluoroacetonate, phencarz=2‐(N‐ethylcarbazolyl‐4)imidazo4,5‐f]1,10‐phenanthroline) decreases with increasing oxygen concentration, and thus the Eu(TTA)3 (phencarz)]/PS composite nanofibrous membranes can be used as an optical oxygen‐sensing material based on emission quenching caused by oxygen. Elemental analysis, UV/Vis absorption spectra, scanning electron microscopy (SEM), fluorescence microscopy, luminescence‐intensity quenching Stern–Volmer plots, and excited‐state decay analysis are used to characterize the obtained oxygen‐sensing materials. A high sensitivity (IN2/IO2) of 3.38 and short response and recovery times (t↓=5.0, t↑=8.0 s) are obtained. These results are the best values reported for oxygen sensors based on EuIII complexes. The high surface area‐to‐volume ratio and porous structure of the electrospun nanofibrous membranes are taken to be responsible for the outstanding performance. |
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| Keywords: | electrospinning lanthanides luminescence membranes sensors |
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