Improvement of ammonia sensing properties of polypyrrole by nanocomposite with graphitic materials

The more sensitive and rapid ammonia gas sensors were prepared with nanocomposites of polypyrrole (PPy) and graphitic materials such as graphite, graphite oxide (GO), and reduced graphene oxide (RGO). Pyrrole was polymerized uniformly on the surface of graphitic materials by in situ polymerization method. The structures of nanocomposites were studied by scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy indicating the well-exfoliated GO and RGO in PPy matrix with favorable interfacial interaction. PPy/RGO nanocomposite showed the highly improved response in detecting ammonia gas mainly due to the effective electron charge transfer between PPy and ammonia and the efficient transfer of electrical resistance variation by the uniformly dispersed conductive RGO in PPy. PPy/RGO nanocomposite gas sensor also showed the excellent reproducibility in ammonia sensing behavior during the recovery process at lower temperature of 373 K.

[1]  A. K. Sood,et al.  Graphene: The New Two‐Dimensional Nanomaterial , 2009 .

[2]  T. Seiyama,et al.  A New Detector for Gaseous Components Using Semiconductive Thin Films. , 1962 .

[3]  Li Shi,et al.  Two-Dimensional Phonon Transport in Supported Graphene , 2010, Science.

[4]  Jun Yan,et al.  An environmentally friendly and efficient route for the reduction of graphene oxide by aluminum powder , 2010 .

[5]  N. Kybert,et al.  Intrinsic response of graphene vapor sensors. , 2008, Nano letters.

[6]  Jun Yan,et al.  Preparation of graphene nanosheet/polymer composites using in situ reduction–extractive dispersion , 2009 .

[7]  Craig A. Grimes,et al.  A wireless, passive carbon nanotube-based gas sensor , 2002 .

[8]  S. Bose,et al.  In-situ synthesis and characterization of electrically conductive polypyrrole/graphene nanocomposites , 2010 .

[9]  J. Lyding,et al.  The influence of edge structure on the electronic properties of graphene quantum dots and nanoribbons. , 2009, Nature materials.

[10]  C. Berger,et al.  Electronic Confinement and Coherence in Patterned Epitaxial Graphene , 2006, Science.

[11]  K. Müllen,et al.  Transparent, conductive graphene electrodes for dye-sensitized solar cells. , 2008, Nano letters.

[12]  Karen Lozano,et al.  Study of processing variables on the electrical resistivity of conductive adhesives , 2009 .

[13]  Zettl,et al.  Extreme oxygen sensitivity of electronic properties of carbon nanotubes , 2000, Science.

[14]  U Zeitler,et al.  Room-Temperature Quantum Hall Effect in Graphene , 2007, Science.

[15]  S. Banerjee,et al.  Large-Area Synthesis of High-Quality and Uniform Graphene Films on Copper Foils , 2009, Science.

[16]  Hongjie Dai,et al.  Functionalized Carbon Nanotubes for Molecular Hydrogen Sensors , 2001 .

[17]  S. Stankovich,et al.  Synthesis of graphene-based nanosheets via chemical reduction of exfoliated graphite oxide , 2007 .

[18]  Stuart A. Rice,et al.  Graphite and Its Crystal Compounds , 1961 .

[19]  Jose Maria Kenny,et al.  NO2 gas sensitivity of carbon nanotubes obtained by plasma enhanced chemical vapor deposition , 2003 .

[20]  Guofang Zhong,et al.  Multi-walled carbon nanotube-based gas sensors for NH3 detection , 2004 .

[21]  N. Bhat,et al.  Structural, mechanical, and electrical properties of electropolymerized polypyrrole composite films , 2001 .

[22]  K. Novoselov,et al.  Detection of individual gas molecules adsorbed on graphene. , 2006, Nature materials.

[23]  T. Huber,et al.  Microwave absorption by polyaniline–carbon nanotube composites , 2006 .

[24]  Mincheol Chang,et al.  Sensing behaviors of polypyrrole nanotubes prepared in reverse microemulsions: effects of transducer size and transduction mechanism. , 2006, The journal of physical chemistry. B.

[25]  D. Chung.  Review Graphite , 2002 .

[26]  Tzong‐Ming Wu,et al.  Synthesis, characterization, and electrical properties of polypyrrole/multiwalled carbon nanotube composites , 2006 .

[27]  P. Calvert,et al.  Thermal stability of electrochemically prepared polythiophene and polypyrrole , 1995 .

[28]  Andre K. Geim,et al.  Electric Field Effect in Atomically Thin Carbon Films , 2004, Science.

[29]  F. Wei,et al.  Preparation of a graphene nanosheet/polyaniline composite with high specific capacitance , 2010 .

[30]  SUPARNA DUTTASINHA,et al.  Graphene: Status and Prospects , 2009, Science.

[31]  Yen-Wen Lin,et al.  Synthesis and characterization of conductive polypyrrole/multi-walled carbon nanotubes composites with improved solubility and conductivity , 2009 .

[32]  P. Pandey,et al.  Synthesis and characterization of polyaniline–carboxylated PVC composites: Application in development of ammonia sensor , 2008 .

[33]  Guohua Chen,et al.  PMMA/graphite nanosheets composite and its conducting properties , 2003 .

[34]  Junya Suehiro,et al.  Controlled fabrication of carbon nanotube NO2 gas sensor using dielectrophoretic impedance measurement , 2005 .

[35]  Junhong Chen,et al.  Reduced graphene oxide for room-temperature gas sensors , 2009, Nanotechnology.

[36]  A. Reina,et al.  Large area, few-layer graphene films on arbitrary substrates by chemical vapor deposition. , 2009, Nano letters.

[37]  Douglas R. Kauffman,et al.  Carbon nanotube gas and vapor sensors. , 2008, Angewandte Chemie.

[38]  Andre K. Geim,et al.  The rise of graphene. , 2007, Nature materials.

[39]  G. Eda,et al.  Large-area ultrathin films of reduced graphene oxide as a transparent and flexible electronic material. , 2008, Nature nanotechnology.

[40]  Saurabh Chopra,et al.  Selective gas detection using a carbon nanotube sensor , 2003 .

[41]  J. Kysar,et al.  Measurement of the Elastic Properties and Intrinsic Strength of Monolayer Graphene , 2008, Science.

[42]  Young-Seak Lee,et al.  Fluorination effects of carbon black additives for electrical properties and EMI shielding efficiency by improved dispersion and adhesion , 2009 .

[43]  S. Stankovich,et al.  Graphene-based composite materials , 2006, Nature.

[44]  Zhiqiang Wang,et al.  Environment-Friendly Method To Produce Graphene That Employs Vitamin C and Amino Acid , 2010 .

[45]  C. Rao,et al.  Some Novel Attributes of Graphene , 2010 .