Issue 8, 2018

Patterned polyaniline encapsulated in titania nanotubes for electrochromism

Abstract

In this article, we report the preparation of a TiO2 nanotube array (TNA) film used as a transparent electrochromic material and a TNA/polyaniline patterned hybrid electrochromic film utilized as an information display material. The TNA film was fabricated by an anodizing process, and a surface patterned TNA with extreme wettability contrast (hydrophilic/hydrophobic) on a TNA surface through self-assembly (SAM) and photocatalytic lithography is fabricated. Then the TNA/polyaniline hybrid film was prepared by electrodeposition of aniline in an aqueous solution. Finally, the electrochromic properties of the TNA film and the TNA/polyaniline hybrid film were investigated. Compared with neat TNA film and polyaniline (PANI) films, the hybrid film shows a much higher optical contrast in the near infrared range. The TNA/polyaniline hybrid film shows higher coloration efficiencies of 24.4 cm2 C−1 at a wavelength of 700 nm and 17.1 cm2 C−1 at a wavelength of 1050 nm compared to the TNA coloration efficiency. The color switching time (20.9 s or 22.9 s) of TNA/polyaniline is faster than TNA.

Graphical abstract: Patterned polyaniline encapsulated in titania nanotubes for electrochromism

Supplementary files

Article information

Article type
Paper
Submitted
11 Nov 2017
Accepted
16 Jan 2018
First published
25 Jan 2018

Phys. Chem. Chem. Phys., 2018,20, 5818-5826

Patterned polyaniline encapsulated in titania nanotubes for electrochromism

H. Lv, Y. Wang, L. Pan, L. Zhang, H. Zhang, L. Shang, H. Qu, N. Li, J. Zhao and Y. Li, Phys. Chem. Chem. Phys., 2018, 20, 5818 DOI: 10.1039/C7CP07617G

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