导电聚吡咯纳米线的电化学无模板法可控合成与表征

以β-萘磺酸(NSA)为掺杂剂,采用电化学无模板法制备了聚吡咯(PPy)纳米线.研究了NSA浓度、吡咯(Py)单体浓度及反应温度对PPy纳米线形貌的影响.分别采用场发射扫描电子显微镜(FE-SEM)和拉曼光谱对PPy纳米线的结构形貌和化学结构进行了表征.结果表明,利用电化学无模板法可得到中空的PPy纳米线;NSA浓度会影响PPy纳米线的取向性;增大Py单体浓度,可制得圆锥状PPy纳米线;低温有利于合成形状细长、紧密堆积的PPy纳米线.PPy纳米线形貌受游离Py浓度及Py-NSA胶束数量影响,通过调节NSA浓度、Py浓度及反应温度改变游离Py浓度及Py-NSA胶束数量,可制得不同形貌的PPy纳米线.

Template-free electrochemical controllable fabrication and characterization of conducting polypyrrole nanowires

In this article, PPy nanowires were fabricated by template-free electrochemical polymerization. FE-SEM and Raman spectra were employed to characterized the morphology and molecular structure of the obtained product, respectively. The results illustrated that PPy nanowires with hollow structure were fabricated on titanium. Moreover, the temperature, concentration of the dopant（β-NSA） and the Py monomer greatly affected the morphology of PPy nanowires. The degree of orientation of nanowires was dependent on the concentration of β-NSA. Conical nanowires were fabricated upon the concentration of Py approaching 0.4 mol/L. High temperature exerted negative effects on the forming of long PPy nanowires. The resulting differences of the morphology should be attributed to the change of the solubility of Py and the number of Py-NSA micelles, both of which were affected by the parameters discussed above.