Preparation and characterization of polypyrrole/selenium composites

This article reports synthesis of polypyrrole (PPy) and its composites having various amounts of selenium (Se) in the presence of nitric acid in aqueous medium via chemical oxidative polymerization. Samples were spectroscopically characterized using Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, and atomic absorption spectroscopy. Although morphology of the samples was examined by using scanning electron microscopy (SEM), their thermal properties were studied via differential scanning calorimetry (DSC). The alternating current (ac) conductivity and dielectric properties were investigated as a function of temperature. Variation of adsorption free energy obtained from Langmuir adsorption isotherm showed that metal cations were physically adsorbed onto the polymer surface. SEM images showed that filling process significantly changes the morphology of PPy. DSC results indicated that cold crystallization temperature (Tcc) of unfilled PPy decreases with increasing filling level. Dielectric measurements showed that relaxation times for PPy and its composites have decreased linearly with increasing temperature. The conductivity

[1]  M. Moloney,et al.  Ultrasensitive Pb(II) potentiometric sensor based on copolyaniline nanoparticles in a plasticizer-free membrane with a long lifetime. , 2012, Analytical chemistry.

[2]  S. Radhakrishnan,et al.  Dopant induced effect on electrocatalytic reduction of nitrobenzene using conducting polypyrrole thin film electrodes , 2011 .

[3]  Shumaila,et al.  Synthesis and characterization of Se doped polyaniline , 2011 .

[4]  Li Zhang,et al.  One-step synthesis of poly(2-hexadecyloxyaniline)/selenium nanocomposite Langmuir–Blogett film by in situ redox reaction , 2011 .

[5]  S. Zor,et al.  Structural and dielectric properties of CuCl2 and ZnCl2 doped polyaniline , 2010 .

[6]  Y. Liao,et al.  Efficient and Scalable Synthesis of Pure Polypyrrole Nanoparticles Applicable for Advanced Nanocomposites and Carbon Nanoparticles , 2010 .

[7]  R. Ciobanu,et al.  Polymerization of pyrrole derivatives on polyacrylonitrile matrix, FTIR–ATR and dielectric spectroscopic characterization of composite thin films , 2010 .

[8]  Peng Liu,et al.  Polypyrrole/vermiculite nanocomposites via self-assembling and in situ chemical oxidative polymerization , 2010 .

[9]  Meirong Huang,et al.  Efficient Synthesis of Intrinsically Conducting Polypyrrole Nanoparticles Containing Hydroxy Sulfoaniline as Key Self-Stabilized Units , 2009 .

[10]  M. Ayad.  Synthesis and characterization of gold–polypyrrole film composite , 2009, Journal of Materials Science.

[11]  Hsiang-Ling Chang,et al.  Synthesis and characterization of conductive polypyrrole with improved conductivity and processability , 2009 .

[12]  Wanjin Zhang,et al.  Fabrication of core-shell Fe3O4/polypyrrole and hollow polypyrrole microspheres , 2009 .

[13]  Yongqin Han.  Synthesis and characterization of montmorillonite/polypyrrole nanocomposite , 2009 .

[14]  S. Ray,et al.  Preparation and characterization of composites of polyethylene with polypyrrole‐coated wollastonite , 2008 .

[15]  R. King,et al.  Spectroscopic and electrical properties of 3-alkyl pyrrole–pyrrole copolymers , 2007 .

[16]  Xin-Gui Li,et al.  Synthesis, Film-Forming, and Electronic Properties of o-Phenylenediamine Copolymers Displaying An Uncommon Tricolor , 2007 .

[17]  D. Şahin,et al.  Synthesis and properties of conducting polypyrrole, polyalkylanilines, and composites of polypyrrole and poly(2-ethylaniline) , 2006 .

[18]  Alexander Kros,et al.  Poly(pyrrole) versus poly(3,4-ethylenedioxythiophene): implications for biosensor applications , 2005 .

[19]  Joon Hak Oh,et al.  Fabrication of a Highly Transparent Conductive Thin Film from Polypyrrole/Poly(methyl methacrylate) Core/Shell Nanospheres , 2005 .

[20]  Qiang He,et al.  Self-assembly and Characterization of Polypyrrole and Polyallylamine Multilayer Films and Hollow Shells , 2004 .

[21]  A. Barakat,et al.  Electric modulus and AC conductivity studies in conducting PPy composite films at low temperature , 2004 .

[22]  A. Barakat,et al.  Preparation, characterization, and electrical conductivity of polypyrrole composite films , 2004 .

[23]  Meifang Zhu,et al.  Synthesis and nitrosation of processible copolymers from pyrrole and ethylaniline , 2004 .

[24]  R. Pogreb,et al.  Preparation of Se-doped polyaniline emeraldine base films , 2003 .

[25]  Xin-Gui Li,et al.  Novel multifunctional polymers from aromatic diamines by oxidative polymerizations. , 2002, Chemical reviews.

[26]  Meifang Zhu,et al.  Synthesis and characterization of pyrrole and anisidine copolymers , 2001 .

[27]  Junshi Guo,et al.  Preparation of conductive polypyrrole composites by in‐situ polymerization , 1999 .

[28]  M. Wan,et al.  Soluble conductive polypyrrole synthesized by in situ doping with β-naphthalene sulphonic acid , 1997 .