Amperometric nitrogen dioxide gas sensor based on PAn/Au/Nafion® prepared by constant current and cyclic voltammetry methods

Abstract Polyaniline (PAn) was electro-deposited on Au/Nafion® by the cyclic voltammetry (CV) and constant current (CC) methods, respectively. The electrochemical properties and surface morphologies of PAn/Au/Nafion® were characterized by SEM, cyclic voltammetry, and ac impedance, respectively. The maximum BET surface area was found to be 10.36 m2 g−1 for PAn/Au/Nafion® prepared by CV method with cycle number of 25 in 1.0 M HClO4 aqueous solution. Using PAn/Au/Nafion® prepared by CV method in 1.0 M HClO4, 1.0 M HCl, and 0.5 M H2SO4 aqueous solutions as working electrodes, the sensitivities of NO2 gas sensors with a gas flow rate of 300 ml min−1 were evaluated to be 3.04, 2.68, and 2.54 μA ppm−1, respectively. Using PAn/Au/Nafion® prepared with CC method to fabricate NO2 gas sensor, the sensitivity decreased from 2.35 to 1.41 μA ppm−1 when the current density for preparing PAn/Au/Nafion® increased from 1 to 10 mA cm−2.

[1]  Joseph R. Stetter,et al.  Electrochemical NO2 gas sensors: Model and mechanism for the electroreduction of NO2 , 1990 .

[2]  Yen Wei,et al.  Polymerization of aniline and alkyl ring-substituted anilines in the presence of aromatic additives , 1990 .

[3]  J. Schoonman,et al.  Potentiometric NOx (x = 1, 2) sensors with Ag+-β″-alumina as solid electrolyte and Ag metal as solid reference , 1992 .

[4]  F. Paolucci,et al.  Polyaniline-based membranes for gas electrodes , 1992 .

[5]  Edward S. Kolesar,et al.  Interdigitated gate electrode field effect transistor for the selective detection of nitrogen dioxide and diisopropyl methylphosphonate , 1989 .

[6]  M. Weller,et al.  A nitrite sodalite-based NO2 gas sensor , 1996 .

[7]  D. Kirwan,et al.  Mass transfer and kinetic effects in an electrode-driven homogeneous reaction , 1981 .

[8]  Susumu Nakamaya.  Potentiometric NO2 gas sensor using LiRESiO4 (RE=Nd and Sm) , 2001 .

[9]  K. Potje-Kamloth,et al.  Electrical properties of doped polypyrrole/silicon heterojunction diodes and their response to NOx gas , 1997 .

[10]  Camilla Baratto,et al.  A novel porous silicon sensor for detection of sub-ppm NO2 concentrations , 2001 .

[11]  J. Do,et al.  Amperometric nitrogen dioxide gas sensor: preparation of PAn/Au/SPE and sensing behaviour , 2001 .

[12]  F. Opekar.  An amperometric solid‐state sensor for Nitrogen dioxide based on a solid polymer electrolyte , 1992 .

[13]  Karel Štulík,et al.  An amperometric solid-state NO2 sensor with a solid polymer electrolyte and a reticulated vitreous carbon indicator electrode , 2000 .

[14]  T. A. Jones,et al.  The use of multisensor systems in monitoring hazardous atmospheres , 1986 .

[15]  G. Coles,et al.  High sensitivity NO2 sensors for environmental monitoring produced using laser ablated nanocrystalline metal oxides , 2002 .

[16]  R Freer,et al.  A time resolved study of the response of a WO3 gas sensor to NO2 using AC impedance spectroscopy , 2002 .

[17]  Tetsuro Hanawa,et al.  Gas sensitivity of polypyrrole films to NO2 , 1988 .

[18]  Ş. Süzer,et al.  A conducting composite of polypyrrole II. As a gas sensor , 1995 .

[19]  Su-Moon Park,et al.  Electrochemistry of conductive polymers. IV: Electrochemical studies on polyaniline degradation ― product identification and coulometric studies , 1988 .

[20]  Philip N. Bartlett,et al.  Conducting polymer gas sensors part II: response of polypyrrole to methanol vapour , 1989 .

[21]  Lorenzo Pavesi,et al.  Very sensitive porous silicon NO2 sensor , 2003 .

[22]  W. Göpel,et al.  Lead phthalocyanine thin films for NO2 sensors , 1991 .

[23]  K. Nagashima,et al.  Electrochemical gas sensor using peo electrolyte , 1990 .

[24]  John D. Wright,et al.  Kinetic factors in the response of organometallic semiconductor gas sensors , 1989 .

[25]  J. Do,et al.  Electrochemical nitrogen dioxide gas sensor based on solid polymeric electrolyte , 1996 .

[26]  G. Sberveglieri,et al.  Front-side micromachined porous silicon nitrogen dioxide gas sensor , 2001 .

[27]  K. Blurton,et al.  A new electrochemical analyser for nitric oxide and nitrogen dioxide. , 1976, Talanta.

[28]  Kuo-Chuan Ho,et al.  An amperometric NO2 gas sensor based on Pt/Nafion® Electrode , 2001 .

[29]  O. N. Timofeeva,et al.  Conducting polymer interaction with gaseous substances I. Water , 1991 .

[30]  F. Opekar,et al.  Amperometric solid-state NO2 sensor based on plasticized PVC matrix containing a hydrophobic electrolyte , 1997 .

[31]  L. Toppare,et al.  Conducting polymers of aniline. II: A composite as a gas sensor , 1993 .

[32]  T. Chou,et al.  The roles of redox mediators in the anodic oxidation of glucose , 1987 .

[33]  Yadong Jiang,et al.  Fabrication and characterization of polyaniline-based gas sensor by ultra-thin film technology , 2002 .

[34]  T. Hanawa,et al.  Gas sensitivities of polypyrrole films to electron acceptor gases. , 1989 .