金纳米粒子/自掺杂聚苯胺纳米纤维复合材料的制备及表征
首发时间:2011-05-06
摘要:一种新型的金纳米粒子/自掺杂聚苯胺(Au/SPAN)纳米纤维复合材料通过共聚的方法合成出来。自掺杂聚苯胺(SPAN)使用苯胺(An)和间氨基苯磺酸(SAN)作为共聚原料,并在酸性溶液中使用十六烷基溴化铵(CTAB)作为结构定型剂,APS作为氧化剂合成。金纳米粒子通过静电作用吸附在表面经过聚二烯丙基二甲基氯化铵(PDDA)改性的SPAN。透射电镜(TEM)和场发射扫描电镜(FESEM)被用于表征该复合材料的形态结构并对其形成机理进行了跟踪。红外光谱(FT-IR)和热重分析(TGA)也被应用于该材料的组成和比重的分析。此外,通过电化学方法对该材料的电化学性质也做了一定的表征。事实证明,Au/SPAN纳米纤维为直径90-100nm,长至数微米的高比表面、高导电能力的优秀材料,有进一步推广应用的潜力。
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Preparation and Charactertization of Gold Nanoparticles/Self-doped Polyaniline Nanofibers
Abstract:A new-type self-doped polyaniline (SPAN) nanofiber with the diameter of 90-100 nm, and length up to several micrometers was synthetized by copolymerization of aniline (An) and m-aminobenzenesulfonic acid (SAN) in aqueous solution using cetyltrimethylammonium bromide (CTAB) as structure directing agent and ammonium peroxydisulfate (APS) as oxidant. Gold nanoparticles (AuNPs) were successfully assembled on the surface of the SPAN which was positive-charged with Poly (diallyldimethylammonium chloride) (PDDA) and the Au/SPAN nanocomposite was obtained. Transmission electron microscopy (TEM) and field-emission scanning electron microscopy (FESEM) were used to characterize the morphology and follow the tracks of the formation of the material. The nature of the Au/SPAN nanofibers was further proved by Fourier transform infrared (FT-IR) spectrum and Thermo-gravimetric analysis (TGA). Electrochemical measurements of the nanocomposite were also performed on the Glassy carbon electrode (GCE). This Au/SPAN nanofiber with high electroactivity and high surface-to-volume ratios has a potential in more rearch fields.
Keywords: self-doped polyaniline Au nanoparticles Nanocomposite Electrochemical
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