Polypyrrol/MnO2 composites: Synthesis, characterization and analytical applications

5^th World Congress on Smart and Emerging Materials

April 19-20, 2018 Dubai, UAE

Hamayun Khan, Khan Malook, Mutabar Shah

Islamia College University, Pakistan
University of Peshawar, Pakistan

Scientific Tracks Abstracts: J Material Sci Eng

Abstract :

Synthesis, characterization and analytical applications of polypyrrole (PPy)-MnO2 composites is presented herein. PPy and its composites were synthesized in the aqueous medium by a modified chemical oxidation polymerization method using ferric chloride as an oxidant. The materials were characterized by FT-IR, XRD, TGA, UV-visible, SEM and EDX spectroscopic and analytical techniques. The FT-IR results confirmed the successful synthesis of PPy and PPy/MnO2 composites with amorphous and crystalline structures, respectively and enhanced thermal stability in case of composites. The SEM and EDX data showed the porous nature of the materials with desired elemental composition. The BET surface area was also determined and found to be increases with the increase of MnO2 content in the composites. The UV-visible spectral analysis confirmed the doping of PPy in composites and found the decrease in the energy band gap values with the increase of MnO2 content in the composites. The analytical applications such as electrical and gas sensing of the synthesized materials were also determined using LCRmeter. The results showed the semiconducting behavior of the materials where the resistance is dependent on temperature and MnO2 content of the composites. The gas sensing behavior of the materials showed high selectivity and sensitivity towards NH3 using 1 to 30 ppm concentration with 0.4 ppm LOD at 25 oC. The sensitivity, response and recovery times of the materials were also determined. References 1. Zhang A Q, Xiao Y H, Lu L Z, Wang L Z, Li F (2013) Polypyrrole/MnO2 composites and their enhanced electrochemical capacitance. J. Appl. Polym. Sci.; 130: 1327-1331. 2. Ramesan M T (2013) Synthesis, characterization, and conductivity studies of polypyrrole/copper sulfide nanocomposites, J. Appl. Polym. Sci.; 128: 1540-1546. 3. Yang X, Li L, Zhao Y (2010) Ag/AgCl-decorated polypyrrole nanotubes and their sensory properties. Synth. Met.; 160: 1822-1825. Recent Publications 4. Ali N, Ismail M, Khan A, Khan H, Haider S, Kamal T (2018) Spectrophotometric determination of urea in real samples using silver nanoparticles by standard addition and 2nd order derivative methods. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy; 189: 110-115. 5. Malook K, Khan H, Shah M, Ihsan-Ul-Haque (2018) Synthesis, characterization and electrical properties of polypyrrole/ V2O5 composites. Korean Journal Chemical Engineering 35(1): 12-19.

Biography :

Hamayun Khan has completed his PhD in Chemistry/Chemical Engineering from Kyungpook National University, Republic of Korea. Currently, he is working as an Associate Professor, Department of Chemistry, Islamia College University, Pakistan and taught Analytical Chemistry as major subject. His fields of interests are environmental and bio analytical chemistry, material chemistry, separation science and technology, wastewater treatment, resource recycling and waste management. He has published one Korea patent, one chapter in book and more than 50 papers in reputed journals. He has served as the Director Academics and ORIC of Islamia College University, Peshawar, Pakistan.
Email:hamayun84@yahoo.com