A luminescent metal-organic framework film fabricated on porous Al2O3 substrate for sensitive detecting ammonia

作者:Zhang, Jun; Yue, Dan; Xia, Tifeng; Cui, Yuanjing*; Yang, Yu; Qian, Guodong*
来源:Microporous and Mesoporous Materials, 2017, 253: 146-150.
DOI:10.1016/j.micromeso.2017.06.053

摘要

A novel metal-organic framework film MIL-124 film was prepared on porous (alpha-Al2O3 ceramic plate by in situ synthesizing. After introducing Eu3+ ions to the free -COOH sites of the MIL-124 ligand channels, a luminescent MOF film MIL-124@Eu3+ was obtained. Based on the chemical reaction between NH3 and the -COOH, the formation of -COONH4 which was demonstrated by FT-IR spectrum, affected the energy transfer between Eu3+ ions and ligand, quenching the characteristic emission of MIL-124@Eu3+ film. The limit of detection to ammonia was calculated as 26.2 ppm in ambient air. The XRD results demonstrated the long-term stability of this ammonia sensor. The excellent performance and economical synthesizing strategy of the MIL-124@Eu3+ film exhibited potential application of this sensor for detecting ammonia gas.

  • 出版日期2017-11-15
  • 单位硅材料国家重点实验室; 浙江大学