Dodecyl benzene sulfonic acid (DBSA) doped polypyrrole (PPy) films: synthesis, structural, morphological, gas sensing and impedance study

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Abstract

Chemical oxidative polymerization of PPy using APS as an oxidizing agent and mechanical blending were utilized to fabricate PPy-DBSA nanocomposites. DBSA plays a role as both dopant and surfactant in the process of nanocomposite synthesis. In this paper, PPy-DBSA nanocomposites are prepared in m-cresol solvent and deposited on glass substrate with various concentrations of DBSA (10–50 Wt%). It is confirmed using X-ray diffraction analysis and Raman spectroscopy that DBSA actually interacts with the PPy matrix and structural formation of PPy-DBSA nanocomposites. The surface morphology of PPy doped with DBSA (PPy-DBSA) is observed with field emission scanning electron microscopy and atomic force microscopy. The compositional analysis carried by energy dispersive photoelectron spectroscopy and X-ray photoelectron spectroscopy evidenced the successful formation of PPy-DBSA nanocomposite. The 10 % PPy-DBSA nanocomposite sensors are selective and sensitive towards NO2 gas so gas response measured at low concentration range of 5–100 ppm. The sensor shows high stability, good reproducibility and recovery time for NO2 gas. The gas sensing mechanism is proposed schematically and is confirmed using impedance analysis.

Keywords

Field Emission Scanning Electron Microscopy Image Sensor Film Camphor Sulphonic Acid Dodecyl Benzene Sulfonic Acid Dodecyl Benzene Sulfonic Acid 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Notes

Acknowledgments

Authors would like thank DAE-BRNS for the financial support through scheme no. 2010/37P/45/BRNS/1442.

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Functional Materials Research Laboratory, School of Physical SciencesSolapur UniversitySolapurIndia
  2. 2.Department of PhysicsSavitribai Phule Pune UniversityPuneIndia

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