Chinese Journal of Applied Chemistry ›› 2017, Vol. 34 ›› Issue (2): 233-241.DOI: 10.11944/j.issn.1000-0518.2017.02.160125

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Electrochromic Properties of Hybrid Mutilayer Film Based on Pressler Type Polyoxometalate P5W30, Positive Polyelectrolyte and Graphene Oxide

WANG Bin(),WANG Xiaohong,Li Jiuming,WANG Xiaohui,XIE Lijuan,Duan Limei,LIU Zongrui   

  1. College of Chemistry and Chemical Engineering,Inner Mongolia University for the Nationalities,Tongliao,Inner Mongolia 028000,China
  • Received:2016-03-25 Accepted:2016-06-17 Published:2017-01-18 Online:2017-01-18
  • Contact: WANG Bin
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21501102), Natural Science Foundation of Inner Mongolia(No.2015BS0207), Science Foundation of Inner Mongolia University for the Nationalities(No.NMDGP1501), Open Projects Founded by Inner Mongolia Key Laboratory for the Natural Products Chemistry and Functional Molecular Synthesis(No.MDK2016010), Ph.D Initiative Science Foundation of Inner Mongolia University for the Nation-alities(No.BS338)


To improve the electrochromic performance of thin film [PEI/P5W30]30(PEI:polyethyleneimine), graphene oxide with large two-dimensional size and excellent electrical conductivity was incorporated. We have fabricated an organic/inorganic hybrid thin film [PEI/P5W30/PEI/GO]30 based on Preyssler-type polyoxometalate K12.5Nal.5[NaP5W30O110]·15H2O(P5W30) and graphene oxide(GO) by layer-by-layer method(LBL). The composition and growth process of the film were characterized by ultraviolet-visible(UV-Vis) spectrophotometer. We investigated the morphology by atomic force microscopy(AFM) and studied the electrochemical properties by cyclic voltammetry of the multilayers. The film displays reversible electrochromic behavior from colorless to blue when applied a redox potential, and the response time of the coloring and discoloring process are all within 10 seconds. More importantly, the electrochromic property has no obvious change after 150 cycles under double potential step at 0.75 V and -0.75 V, the electrocromic film reflects a good reversibility. The film of [PEI/P5W30/PEI/GO]30 exhibits fast response, long durability after GO embedding, and has a potential application in electrochromic devices.

Key words: polyoxometalates, graphene oxide, controllable self-assembly thin films, electrochromism