ZnO assisted polyaniline nanofibers and its application as ammonia gas sensor

Abstract A novel route for the synthesis of polyaniline nanofibers in the presence of varying amounts of zinc oxide has been reported in this paper. The homogeneous PANI nanofibers were prepared through template approach, in which the ZnO nanoparticles were used as template. Structural, optical and morphological analysis of synthesized nanofibers was carried out using X-ray diffraction, UV–vis, IR spectroscopy and FESEM techniques. The thick films of the synthesized polyaniline powder were deposited on alumina substrate and their sensing response to ammonia gas was investigated. Optimum sensing response was achieved with PANI nanofibers synthesized in the presence of 30 wt% ZnO powder. The sensing response of fabricated sensor was proportional to the ammonia gas concentration and exhibited excellent selectivity toward ammonia gas.

[1]  Richard B. Kaner,et al.  Polyaniline Nanofiber Gas Sensors: Examination of Response Mechanisms , 2004 .

[2]  P. Laughlin,et al.  Low temperature synthesis of high molecular weight polyaniline , 1996 .

[3]  J. Stejskal,et al.  Polyaniline. Preparation of a conducting polymer(IUPAC Technical Report) , 2002, Chemistry International.

[4]  P. C. Deb,et al.  Synthesis and characterization of polyaniline–maleic acid salt , 2001 .

[5]  Arthur J. Epstein,et al.  'Synthetic metals': a novel role for organic polymers , 1989 .

[6]  Richard B Kaner,et al.  A general chemical route to polyaniline nanofibers. , 2004, Journal of the American Chemical Society.

[7]  Shurong Wang,et al.  Gas sensing performance of polyaniline/ZnO organic-inorganic hybrids for detecting VOCs at low temperature , 2011 .

[8]  D. K. Aswal,et al.  Growth and gas sensing characteristics of p- and n-type ZnO nanostructures , 2011 .

[9]  V. Patil,et al.  Measurements on room temperature gas sensing properties of CSA doped polyaniline–ZnO nanocomposites , 2012 .

[10]  Hailing Hu,et al.  Effect of modified ITO substrate on electrochromic properties of polyaniline films , 2007 .

[11]  Fabienne Poncin-Epaillard,et al.  Polyaniline as a new sensitive layer for gas sensors , 2003 .

[12]  Chun Zhao,et al.  A novel all-plastic diode based upon pure polyaniline material , 2007, Microelectron. J..

[13]  M. Wan,et al.  Molybdic acid doped polyaniline micro/nanostructures via a self-assembly process , 2008 .

[14]  C. N. R. Rao,et al.  H2S sensors based on tungsten oxide nanostructures , 2008 .

[15]  Jaroslav Stejskal,et al.  Polyaniline nanostructures and the role of aniline oligomers in their formation , 2010 .

[16]  Alan J. Heeger,et al.  THE FOURTH GENERATION OF POLYMERIC MATERIALS , 2001 .

[17]  Xijiang Han,et al.  Synthesis of polyaniline nanofibers with high electrical conductivity from CTAB–SDBS mixed surfactants , 2011 .

[18]  Lei Jiang,et al.  3D-boxlike polyaniline microstructures with super-hydrophobic and high-crystalline properties , 2008 .

[19]  M. Shamsipur,et al.  A new design for dry polyaniline rechargeable batteries , 2003 .

[20]  Hao Cui,et al.  Modification of glassy carbon electrode with polyaniline/multi-walled carbon nanotubes composite: Application to electro-reduction of bromate , 2012 .

[21]  Dinesh K. Aswal,et al.  Preparation of nanofibrous polyaniline films and their application as ammonia gas sensor , 2007 .

[22]  Jinhuai Liu,et al.  Gas sensors for ammonia detection based on polyaniline-coated multi-wall carbon nanotubes , 2009 .

[23]  Yongxiang Li,et al.  Synthesis and electrochemical properties of template-based polyaniline nanowires and template-free nanofibril arrays: Two potential nanostructures for gas sensors , 2009 .

[24]  S. Fedorova,et al.  Polyaniline and polypyrrole prepared in the presence of surfactants: a comparative conductivity study , 2003 .

[25]  B. Yazıcı,et al.  Zinc modified polyaniline coating for mild steel protection , 2006 .

[26]  Jitae Kim,et al.  Studies on tin oxide-intercalated polyaniline nanocomposite for ammonia gas sensing applications , 2009 .

[27]  V. Patil,et al.  Fussy nanofibrous network of polyaniline (PANi) for NH3 detection , 2012 .

[28]  E. Zaki,et al.  Doping of polyaniline films with organic sulfonic acids in aqueous media and the effect of water on these doped films , 2008 .

[29]  Kurt E. Geckeler,et al.  Polymer nanoparticles: Preparation techniques and size-control parameters , 2011 .

[30]  P. Laughlin,et al.  Synthesis of high molecular weight polyaniline at low temperatures , 1996 .

[31]  I. Mulla,et al.  Effect of aluminium doping on structural and gas sensing properties of zinc oxide thin films deposited by spray pyrolysis , 2011 .

[32]  Man Jiang,et al.  Hybrid structure of polyaniline/ZnO nanograss and its application in dye-sensitized solar cell with performance improvement , 2012 .

[33]  H. Yin,et al.  Synthesis of high-performance one-dimensional polyaniline nanostructures using dodecylbenzene sulfonic acid as soft template , 2011 .

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

[35]  O. Singh,et al.  Synthesis of zinc oxide nanorods and nanoparticles by chemical route and their comparative study as ethanol sensors , 2008 .