4.6 Article

Formation of photo- and thermo-stable layered double hydroxide films with photo-responsive wettability by intercalation of functionalized azobenzenes

期刊

CHEMICAL ENGINEERING SCIENCE
卷 64, 期 21, 页码 4350-4357

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2009.07.005

关键词

Layered double hydroxides; Films; Radiation; Control; Nanostructure; Stability

资金

  1. National Natural Science Foundation of China
  2. 111 Project [B07004]
  3. 973 Program [2009CB939802]
  4. Program for New Century Excellent Talents in Universities
  5. Beijing Nova Program

向作者/读者索取更多资源

A hybrid film containing a substituted azobenzene, 7-[(trifluoromethoxyphenylazo)phenoxy]pentanoate anion (CF(3)AZO(-)), intercalated in a layered double hydroxide (LDH) film immobilized on a porous anodic alumina/aluminum (PAO/Al) substrate has been prepared by an anion-exchange reaction of a ZnAl-NO3-LDH/PAO/Al precursor film with the sodium salt of CF(3)AZO(-) anions under mild conditions. The hybrid LDH film was characterized by scanning electron microscopy, powder X-ray diffraction and Fourier transform infrared spectroscopy. TG-DTA, UV-visible spectroscopy and CIE 1976 L*a*b* color difference (Delta E) tests indicated that the intercalated ZnAl-CF(3)AZO-LDH showed enhanced thermo-stability and photo-stability compared to the pristine CF(3)AZO salt. Irradiation with UV light led to a switch in wettability of the film from superhydrophobic to hydrophilic and this process could be reversed by subsequent irradiation with visible light. (C) 2009 Elsevier Ltd. All rights reserved.

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