Journal
ACS OMEGA
Volume 5, Issue 7, Pages 3689-3698Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsomega.9b04290
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Funding
- National Natural Science Foundation of China [21872119]
- Talent Engineering Training Funding Project of Hebei Province [A201905004]
- Research Program of the College Science and Technology of Hebei Province [ZD2018091]
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Two kinds of layered double hydroxide (LDH) Langmuir composite films containing azobenzene (Azo) groups were successfully prepared by Langmuir-Blodgett (LB) technology. Then, an X-ray diffractometer (XRD), a transmission electron microscope (TEM), and an atomic force microscope (AFM) were used to investigate the structures of NiFe-LDH and the uniform morphologies of the composite LB films. The photoisomerization and acid-base gas sensor performances of the obtained thin film samples were tested by infrared visible (FTIR) spectroscropy and ultraviolet visible (UV-vis) spectroscropy. It is proved that the Azo dye molecules in the composite film are relatively stable to photoisomerization. In addition, the prepared composite films have high sensing sensitivity and good recyclability for acid-base response gases. The present research proposes a new clue for designing thin film materials for chemical gas response with good stability and sensitivity.
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