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| 1 | Influence of acetone on nanostructure and electrochemical properties of interfacial synthesized polyaniline nanofibers显示文摘The growth of polyaniline(PANI) nano fi bers through interfacial polymerization can be well controlled by adding a small amount of acetone in the water/chloroform system. It was found that the polymerization rate became slower in the presence of acetone, yielding PANI nano fi bers with larger aspect ratios. The in fl uences of the acetone addition on the morphology, microstructure and properties of as-prepared PANI nano fi bers were studied by scanning electron microscope(FE-SEM), ultraviolet–visible spectra(UV–vis), Fourier transform infrared(FT-IR) and Raman spectroscopy, X-ray diffraction(XRD), thermogravity analysis(TGA), and electrical and electrochemical measurements. The experimental results showed that PANI nano fi bers prepared by using ammonium persulfate(APS) as an oxidant with acetone exhibited slower growth, the larger ratio of length to diameter, and higher crystallinity(2θ=6℃, 19℃, 26℃) than that without acetone, meanwhile remained larger yield of 11.23% and higher conductivity 1.8*10-2S/cm compared with that obtained by replacing APS with Fe Cl3. More importantly, these PANI nano fi bers exhibited better electrochemical behaviors, which bene fi tted from their high crystallinity and good conductivity. | Jianyun Zhao Zongyi Qin Tao Li Zhuozhan Li Zhe Zhou Meifang Zhu | 2015 | Progress in Natural Science:Materials International2015，25，4： | 2 |
| 2 | Polyaniline nanostructures tuning with oxidants in interfacial polymerization system显示文摘Three kinds of nanostructured polyanilines(PANIs) were prepared through interfacial polymerization by using ammonium persulfate(APS) as a single oxidant,and APS/FeCl_3,APS/K_2Cr_2O_7 as composite oxidants,respectively.It is observed that faster formation process and higher yield of nanostructured PANIs could be achieved in the presence of FeCl_3 and K_2Cr_2O_7.The as-prepared PANIs were characterized by field emission scanning electron microscopy,ultraviolet-visible absorption spectroscopy,Fourier transform infrared and Raman spectroscopy,X-ray diffraction analysis and electrochemical measurements including cyclic voltammetry and galvanostatic charge/discharge measurement.The influence of composite oxidants on the morphology,microstructure,and electrical and electrochemical properties of PANIs was discussed.Interestingly,when APS/K_2Cr_2O_7 was used as the composite oxidants,PANI exhibited petal-like structure with high yield of 57.35%instead of general nanofibrous morphology formed in interfacial polymerization.Compared with those nanofibrous PANIs obtained by using APS as a single oxidant or APS/FeCl_3 as composite oxidants,petal-like PANIs exhibited the largest specific capacitance(692.4 F/g at scan rate of 5 mV/s) and highest cycle stability among them.It provides a new insight into the control of PANI nanostructures with high yield and energy storage ability by simply selecting suitable composite oxidants in interfacial polymerization. | Fanxin Zeng Zongyi Qin Banglei Liang Tao Li Na Liu Meifang Zhu | 2015 | Progress in Natural Science:Materials International2015，25，5： | 0 |
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