The nanocomposite of polypyrrole (PPy) and carboxylated multi-walled carbon nanotubes (MWCNT) was synthesized by in situ chemical oxidative polymerization method using HCl as a dopant and Ammonium persulphate (APS) as an oxidant. The MWCNTs were carboxylic functionalized and were ultrasonicated to obtain uniform dispersion within the PPy matrix. Surface morphology of nanocomposites was investigated by Field Emission Scanning Electron microscopy (FE-SEM) and revealed that the functionalized MWCNTs were well embedded. X-Ray diffraction (XRD), Fourier Transform Infrared (FT-IR) Spectroscopy, Raman spectroscopy and UV-Vis spectroscopy were used to characterize the synthesized PPy-MWCNT nanocomposite. It was found that in situ polymerized PPy layer matrix was formed on carboxylated MWCNT and there was uniform dispersion of MWCNTs within the PPy matrix with significant interaction between PPy and MWCNTs. The response of the prepared PPy-MWCNT nanocomposite sensors was studied in the form of sensitivity towards Ammonia gas (NH 3 ). The synergistic effects of the PPy-coated MWCNTs improve the gas sensing properties. Results showed that the sensitivity increased with NH3 concentration and it was also affected by the MWCNT content in PPy matrix. Furthermore, the sensor in pellet form reported here is robust, cost effective and relatively stable at room temperature.
Timmer, B., Olthuis, W. and Van Den Berg, A. (2005) Ammonia Sensors and Their Applications—A Review. Sensors and Actuators B: Chemical, 107, 666-677. http://dx.doi.org/10.1016/j.snb.2004.11.054
Risby, T.H. and Solga, S. (2006) Current Status of Clinical Breath Analysis. Applied Physics B, 85, 421-426. http://dx.doi.org/10.1007/s00340-006-2280-4
Kalyamwar, V. and Raghuwanshi, F. (2013) TiO2 Modified ZnO Thick Film Resistors as Ammonia Gas Sensors. Advanced Materials Letters, 4, 895-898.
Ansari, M.O., Khan, M.M., Ansari, S.A., Amal, I., Lee, J. and Cho, M.H. (2014) Enhanced Thermoelectric Performance and Ammonia Sensing Properties of Sulfonated Polyaniline/Graphene Thin Films. Materials Letters, 114, 159-162. http://dx.doi.org/10.1016/j.matlet.2013.09.098
Bulakhe, R., Patil, S., Deshmukh, P., Shinde, N. and Lokhande, C. (2013) Fabrication and Performance of Polypyrrole (Ppy)/TiO2 Heterojunction for Room Temperature Operated LPG Sensor. Sensors and Actuators B: Chemical, 181, 417-423. http://dx.doi.org/10.1016/j.snb.2013.01.056
Talwar, V., Singh, O. and Singh, R.C. (2014) ZnO Assisted Polyaniline Nanofibers and Its Application as Ammonia Gas Sensor. Sensors and Actuators B: Chemical, 191, 276-282. http://dx.doi.org/10.1016/j.snb.2013.09.106
He, L., Jia, Y., Meng, F., Li, M. and Liu, J. (2009) Gas Sensors for Ammonia Detection Based on Polyaniline-Coated Multi-Wall Carbon Nanotubes. Materials Science and Engineering: B, 163, 76-81. http://dx.doi.org/10.1016/j.mseb.2009.05.009
Abdulla, S., Mathew, T.L. and Pullithadathil, B. (2015) Highly Sensitive, Room Temperature Gas Sensor Based on Polyaniline-Multiwalled Carbon Nanotubes (PANI/MWCNTs) Nanocomposite for Trace-Level Ammonia Detection. Sensors and Actuators B: Chemical. http://dx.doi.org/10.1016/j.snb.2015.08.002
Kar, P. and Choudhury, A. (2013) Carboxylic Acid Functionalized Multi-Walled Carbon Nanotube Doped Polyaniline for Chloroform Sensors. Sensors and Actuators B: Chemical, 183, 25-33. http://dx.doi.org/10.1016/j.snb.2013.03.093
Huang, L., Jiang, P., Wang, D., Luo, Y., Li, M., Lee, H. and Gerhardt, R.A. (2014) A Novel Paper-Based Flexible Ammonia Gas Sensor via Silver and SWNT-PABS Inkjet Printing. Sensors and Actuators B: Chemical, 197, 308-313. http://dx.doi.org/10.1016/j.snb.2014.02.081
Cui, S.M., Pu, H.H., Lu, G.H., Wen, Z.H., Mattson, E.C., Hirschmugl, C., Gajdardziska-Josifovska, M., Weinert, M. and Chen, J.H. (2012) Fast and Selective Room-Temperature Ammonia Sensors Using Silver Nanocrystal-Functionalized Carbon Nanotubes. ACS Applied Materials & Interfaces, 4, 4898-4904. http://dx.doi.org/10.1021/am301229w
Kondawar, S., Agrawal, S., Nimkar, S., Sharma, H. and Patil, P. (2012) Conductive Polyaniline-Tin Oxide Nanocomposites for Ammonia Sensor. Advanced Material Letters, 3, 393-398.
Kondawar, S.B., Patil, P.T. and Agrawal, S.P. (2014) Chemical Vapour Sensing Properties of Electrospun Nanofibers of Polyaniline/ZnO Nanocomposites. Advanced Material Letters, 5, 389-395.
Jang, W.K., Yun, J., Kim, H.-I. and Lee, Y.-S. (2011) Preparation and Characteristics of Conducting Polymer-Coated Multiwalled Carbon Nanotubes for a Gas Sensor. Carbon Letters, 12, 162-166. http://dx.doi.org/10.5714/CL.2011.12.3.162
Whitby, R.L., Korobeinyk, A., Mikhalovsky, S.V., Fukuda, T. and Maekawa, T. (2011) Morphological Effects of Single-Layer Graphene Oxide in the Formation of Covalently Bonded Polypyrrole Composites Using Intermediate Diisocyanate Chemistry. Journal of Nanoparticle Research, 13, 4829-4837. http://dx.doi.org/10.1007/s11051-011-0459-z
Sirivisoot, S., Pareta, R. and Webster, T.J. (2011) Electrically Controlled Drug Release from Nanostructured Polypyrrole Coated on Titanium. Nanotechnology, 22, Article ID: 085101. http://dx.doi.org/10.1088/0957-4484/22/8/085101
Tiwari, D.C., Atri, P. and Sharma, R. (2015) Sensitive Detection of Ammonia by Reduced Graphene Oxide/Polypyr-role Nanocomposites. Synthetic Metals, 203, 228-234. http://dx.doi.org/10.1016/j.synthmet.2015.02.026
Xiang, C.L., Jiang, D.D., Zou, Y.J., Chu, H.L., Qiu, S.J., Zhang, H.Z., Xu, F., Sun, L.X. and Zheng, L.J. (2015) Ammonia Sensor Based on Polypyrrole-Graphene Nanocomposite Decorated with Titania Nanoparticles. Ceramics International, 41, 6432-6438. http://dx.doi.org/10.1016/j.ceramint.2015.01.081
An, K.H., Jeong, S.Y., Hwang, H.R. and Lee, Y.H. (2004) Enhanced Sensitivity of a Gas Sensor Incorporating Single-Walled Carbon Nanotube-Polypyrrole Nanocomposites. Advanced Materials, 16, 1005-1009. http://dx.doi.org/10.1002/adma.200306176
Huyen, D.N., Tung, N.T., Vinh, T.D. and Thien, N.D. (2012) Synergistic Effects in the Gas Sensitivity of Polypyrrole/Single Wall Carbon Nanotube Composites. Sensors, 12, 7965-7974. http://dx.doi.org/10.3390/s120607965
Montoya, P., Mejía, S., Goncales, V.R., de Torresi, S.I.C. and Calderón, J.A. (2015) Performance Improvement of Macroporous Polypyrrole Sensor for Detection of Ammonia by Incorporation of Magnetite Nanoparticles. Sensors and Actuators B: Chemical, 213, 444-451. http://dx.doi.org/10.1016/j.snb.2015.02.118
Singh, S., Yadav, B., Singh, A. and Dwivedi, P.K. (2012) Synthesis of Nanostructured Iron-Antimonate and Its Application as Liquefied Petroleum Gas Sensor. Advanced Materials Letters, 3, 154-160. http://dx.doi.org/10.5185/amlett.2011.11318
Barkade, S., Pinjari, D., Nakate, U., Singh, A., Gogate, P., Naik, J., Sonawane, S. and Pandit, A. (2013) Ultrasound Assisted Synthesis of Polythiophene/SnO2 Hybrid Nanolatex Particles for LPG Sensing. Chemical Engineering and Processing: Process Intensification, 74, 115-123. http://dx.doi.org/10.1016/j.cep.2013.09.005
Venkatesan, R. and Cindrella, L. (2015) Semiconducting Composite of Chalcone-Bridged Polythiophene and Titania, Its Ammonia Vapor Sensing Property. Materials Science in Semiconductor Processing, 34, 126-137. http://dx.doi.org/10.1016/j.mssp.2015.02.025
Yun, J., Im, J.S., Kim, H.-I. and Lee, Y.-S. (2012) Effect of Oxyfluorination on Gas Sensing Behavior of Polyaniline-Coated Multi-Walled Carbon Nanotubes. Applied Surface Science, 258, 3462-3468. http://dx.doi.org/10.1016/j.apsusc.2011.11.098
Ngo, C.L., Le, Q.T., Ngo, T.T., Nguyen, D.N. and Vu, M.T. (2013) Surface Modification and Functionalization of Carbon Nanotube with Some Organic Compounds. Advances in Natural Sciences: Nanoscience and Nanotechnology, 4, Article ID: 035017.
Sahoo, N.G., Jung, Y.C., So, H.H. and Cho, J.W. (2007) Polypyrrole Coated Carbon Nanotubes: Synthesis, Characterization, and Enhanced Electrical Properties. Synthetic Metals, 157, 374-379. http://dx.doi.org/10.1016/j.synthmet.2007.04.006
Zhang, B., Xu, Y., Zheng, Y., Dai, L., Zhang, M., Yang, J., Chen, Y., Chen, X. and Zhou, J. (2011) A Facile Synthesis of Polypyrrole/Carbon Nanotube Composites with Ultrathin, Uniform and Thickness-Tunable Polypyrrole Shells. Nanoscale Research Letters, 6, 431. http://dx.doi.org/10.1186/1556-276X-6-431
Manivel, P., Kanagaraj, S., Balamurugan, A., Ponpandian, N., Mangalaraj, D. and Viswanathan, C. (2014) Rheological Behavior and Electrical Properties of Polypyrrole/Thermally Reduced Graphene Oxide Nanocomposite. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 441, 614-622. http://dx.doi.org/10.1016/j.colsurfa.2013.10.031
Liu, Y., Wang, H.H., Zhou, J., Bian, L.Y., Zhu, E.W., Hai, J.F., Tang, J. and Tang, W.H. (2013) Graphene/Polypyrrole Intercalating Nanocomposites as Supercapacitors Electrode. Electrochimica Acta, 112, 44-52. http://dx.doi.org/10.1016/j.electacta.2013.08.149
Schnoor, T.I., Smith, G., Eder, D., Koziol, K.K., Burstein, G.T., Windle, A.H. and Schulte, K. (2013) The Production of Aligned MWCNT/Polypyrrole Composite Films. Carbon, 60, 229-235. http://dx.doi.org/10.1016/j.carbon.2013.04.016
Liu, P., Wang, X. and Li, H.D. (2013) Preparation of Carboxylated Carbon Nanotubes/Polypyrrole Composite Hollow Microspheres via Chemical Oxidative Interfacial Polymerization and Their Electrochemical Performance. Synthetic Metals, 181, 72-78. http://dx.doi.org/10.1016/j.synthmet.2013.08.010
Mahore, R.P., Burghate, D.K. and Kondawar, S.B. (2014) Development of Nanocomposites Based on Polypyrrole and Carbon Nanotubes for Supercapacitors. Advanced Material Letters, 5, 400-405.
Sahoo, S., Karthikeyan, G., Nayak, G.C. and Das, C.K. (2011) Electrochemical Characterization of in Situ Polypyrrole Coated Graphene Nanocomposites. Synthetic Metals, 161, 1713-1719. http://dx.doi.org/10.1016/j.synthmet.2011.06.011
Van Hieu, N., Dung, N.Q., Tam, P.D., Trung, T. and Chien, N.D. (2009) Thin Film Polypyrrole/SWCNTs Nanocomposites-Based NH3 Sensor Operated at Room Temperature. Sensors and Actuators B: Chemical, 140, 500-507. http://dx.doi.org/10.1016/j.snb.2009.04.061
Mane, A., Navale, S., Pawar, R., Lee, C. and Patil, V. (2015) Microstructural, Optical and Electrical Transport Properties of WO3 Nanoparticles Coated Polypyrrole Hybrid Nanocomposites. Synthetic Metals, 199, 187-195. http://dx.doi.org/10.1016/j.synthmet.2014.11.031
Wu, T.-M., Chang, H.-L. and Lin, Y.-W. (2009) Synthesis and Characterization of Conductive Polypyrrole/Multi-Walled Carbon Nanotubes Composites with Improved Solubility and Conductivity. Composites Science and Technology, 69, 639-644. http://dx.doi.org/10.1016/j.compscitech.2008.12.010
Chen, A., Kamata, K., Nakagawa, M., Iyoda, T., Wang, H. and Li, X. (2005) Formation Process of Silver-Polypyrrole Coaxial Nanocables Synthesized by Redox Reaction between AgNO3 and Pyrrole in the Presence of Poly (Vinylpyrrolidone). The Journal of Physical Chemistry B, 109, 18283-18288. http://dx.doi.org/10.1021/jp053247x
Waghuley, S., Yenorkar, S., Yawale, S. and Yawale, S. (2008) Application of Chemically Synthesized Conducting Polymer-Polypyrrole as a Carbon Dioxide Gas Sensor. Sensors and Actuators B: Chemical, 128, 366-373. http://dx.doi.org/10.1016/j.snb.2007.06.023
Ram, M.K., Yavuz, O. and Aldissi, M. (2005) NO2 Gas Sensing Based on Ordered Ultrathin Films of Conducting Polymer and Its Nanocomposite. Synthetic Metals, 151, 77-84. http://dx.doi.org/10.1016/j.synthmet.2005.03.021
Arab, M., Berger, F., Picaud, F., Ramseyer, C., Glory, J. and Mayne-L’Hermite, M. (2006) Direct Growth of the Multi-Walled Carbon Nanotubes as a Tool to Detect Ammonia at Room Temperature. Chemical Physics Letters, 433, 175-181. http://dx.doi.org/10.1016/j.cplett.2006.10.036
Bekyarova, E., Davis, M., Burch, T., Itkis, M., Zhao, B., Sunshine, S. and Haddon, R. (2004) Chemically Functionalized Single-Walled Carbon Nanotubes as Ammonia Sensors. The Journal of Physical Chemistry B, 108, 19717-19720. http://dx.doi.org/10.1021/jp0471857
Yu, Y.J., Ouyang, C., Gao, Y., Si, Z.H., Chen, W., Wang, Z.Q. and Xue, G. (2005) Synthesis and Characterization of Carbon Nanotube/Polypyrrole Core-Shell Nanocomposites via in Situ Inverse Microemulsion. Journal of Polymer Science Part A: Polymer Chemistry, 43, 6105-6115. http://dx.doi.org/10.1002/pola.21114
Zhang, X.T., Zhang, J., Wang, R.M., Zhu, T. and Liu, Z.F. (2004) Surfactant-Directed Polypyrrole/Cnt Nanocables: Synthesis, Characterization, and Enhanced Electrical Properties. ChemPhysChem, 5, 998-1002. http://dx.doi.org/10.1002/cphc.200301217
Chen, Y.-S., Li, Y., Wang, H.-C. and Yang, M.-J. (2007) Gas Sensitivity of a Composite of Multi-Walled Carbon Nanotubes and Polypyrrole Prepared by Vapor Phase Polymerization. Carbon, 45, 357-363. http://dx.doi.org/10.1016/j.carbon.2006.09.011
Lokhande, C., Gondkar, P., Mane, R.S., Shinde, V. and Han, S.-H. (2009) CBD Grown ZnO-Based Gas Sensors and Dye-Sensitized Solar Cells. Journal of Alloys and Compounds, 475, 304-311. http://dx.doi.org/10.1016/j.jallcom.2008.07.025
Yan, T., Li, T.X., Wang, R.Z. and Jia, R. (2015) Experimental Investigation on the Ammonia Adsorption and Heat Transfer Characteristics of the Packed Multi-Walled Carbon Nanotubes. Applied Thermal Engineering, 77, 20-29. http://dx.doi.org/10.1016/j.applthermaleng.2014.12.001
Sharma, S., Hussain, S., Singh, S. and Islam, S. (2014) MWCNT-Conducting Polymer Composite Based Ammonia Gas Sensors: A New Approach for Complete Recovery Process. Sensors and Actuators B: Chemical, 194, 213-219. http://dx.doi.org/10.1016/j.snb.2013.12.050
Kotresh, S., Ravikiran, Y., Kumari, S.V., Prakash, H.R. and Thomas, S. (2015) Polyaniline Niobium Pentoxide Composite as Humidity Sensor at Room Temperature. Advanced Materials Letters, 6, 641-645.
Cho, J.-H., Yu, J.-B., Kim, J.-S., Sohn, S.-O., Lee, D.-D. and Huh, J.-S. (2005) Sensing Behaviors of Polypyrrole Sensor under Humidity Condition. Sensors and Actuators B: Chemical, 108, 389-392. http://dx.doi.org/10.1016/j.snb.2004.12.082
Jung, D., Han, M. and Lee, G.S. (2014) Humidity-Sensing Characteristics of Multi-Walled Carbon Nanotube Sheet. Materials Letters, 122, 281-284. http://dx.doi.org/10.1016/j.matlet.2014.02.049
Navale, S., Mane, A., Chougule, M., Sakhare, R., Nalage, S. and Patil, V. (2014) Highly Selective and Sensitive Room Temperature NO2 Gas Sensor Based on Polypyrrole Thin Films. Synthetic Metals, 189, 94-99. http://dx.doi.org/10.1016/j.synthmet.2014.01.002