| The Polyoxometalate aroused great interest of researchers because they havea particularly excellent electrical properties and potential applications.Polyoxometalates have prominent features in the photochromic, electrochemical,electrical, catalytic and photocatalytic and have attracted increasing attention inelectrochemistry and materials chemistry research. The organic-inorganiccomposite films containing POMs have very attractive research fields, Such aslight, the light-induced discoloration, magnetic, electrical, and catalytic,therefore the composite films have become more and more important in the fieldof POM and materials chemistry. Noble metal nanoparticles because of theirunique optical, electronic and catalytic properties, have attracted a great deal ofattention in the construction of electronic nanodevices. The assembly ofpolyoxometalates and noble-metal nanoparticles can explore the potentialapplication in new, excellent light, color and electrochemical properties.A H4[PMo11VO40](PMo11V) and phthalocyanine cobalt （PhSPcCo） organic-inorganic nanofilm {PEI/[PMo11V/PEI/PhSPcCo]n} had been prepared by usingof a layer-by-layer self-assembled technology and structurally characterized byUV spectroscopy （UV-vis）, X-ray photoelectron spectroscopy （XPS）, atomicforce microscopy （AFM） and cyclic voltammetry. The results showed that theorganic-inorganic composite film maintained the original structure. The growthof the self-assembled composite film was linear homogeneous, while, the surfaceof the composite membrane was composed of uniform spherical particles.Electrochemical studies showed that self-assembled monolayers on dopaminehad good electrochemical properties. The best catalytic effect for DA was four-layer films. According to the chronoamperometry, we could obtain that theresponse time was1.5s, and the linear range was5×10-62.75×10-4M and 3.25×10-47.75×10-4M, respectively.A POM K12.5Nal.5[NaP5W30O110]·l5H2O (P5W30) and Au nanoparticles（AuNPs）{PEI/[PSS-Au/PEI/P5W30]n} had been prepared by using of a layer-by-layer self-assembled technology. Based on the multilayer film growth process ofultraviolet spectrum monitoring, we found that the films are formed by uniformlayers. The result of the scanning electron microscopy showed the nanoparticlessize, uniform distribution. Atomic force microscopy results show that themultilayer films surface is flat and smooth with a large number of sphericalnanoparticles. The studies showed {PEI/[PSS-Au/PEI/P5W30]6} had a goodelectrochemical properties of IO3-. The study of the electrochromic properties ofthe film indicated that the optical contrast of the film containing AuNPs was28.1%, coloration efficiency was21.0cm2·C-1, and coloring and bleaching timewas3.3s and3.6s, respectively. |
PDF Full Text Request