Electrochromic Poly(DNTD)/WO3 Nanocomposite Films via Electorpolymerization

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• 作者：Huige Wei ; Xingru Yan ; Yunfeng Li ; Hongbo Gu ; Shijie Wu ; Keqiang Ding ; Suying Wei ; Zhanhu Guo
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：August 2, 2012
• 年：2012
• 卷：116
• 期：30
• 页码：16286-16293
• 全文大小：549K
• 年卷期：v.116,no.30(August 2, 2012)
• ISSN：1932-7455

文摘

Poly(DNTD,N,N鈥?di[p-phenylamino(phenyl)]-1,4,5,8-naphthalene tetracarboxylic diimide) and its nanocomposite film incorporated with WO₃ nanoparticles was prepared by a facile electropolymerization method on an indium in oxide (ITO) coated glass slide from the DNTD monomer and WO₃ nanoparticles suspended methylene chloride solution. The morphology and microstructure of the nanocomposite film were characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The SEM image shows that the WO₃ nanoparticles are uniformly embedded in the polymeric matrix. The nanocomposite film also displays smooth topography with evenly sized and uniformly distributed nanoparticles under high resolution AFM observations. An air-stable electrochromical window was assembled and obtained by a homemade electrochemical cell to study the electrochromism and stability of the nanocomposite film. The composite film exhibits multiple colors at both the cathodic and anodic potentials, i.e., light blue at 鈭?.4 V, orange red at 鈭?.8 V, colorless at 0 V, orange green at 0.8 V, light blue at 1.0 V, and deep blue at 1.2 or 1.4 V vs Ag/AgCl in propylene carbonate containing 1.0 M LiClO₄ electrolyte. The UV鈥搗isible incorporated electrochemical spectroscopy coupled with amperometry were also employed to study the composite film under different potentials in the range of 鈭?.4 to 1.4 V vs Ag/AgCl. The composite film also shows stable electrochromism even after 100 scans. The thermogravimetric analysis (TGA) and Fourier transform infrared (FT-IR) analysis suggest the hydrogen bonding formed between the monomers and WO₃ particles, resulting in an increased initial oxidation potential for the monomer during the poly(DNTD)/WO₃ nanocomposite film formation.