Fabrication of ammonia gas sensor based on polyaniline/mussel shell composite

• Main Authors: Albar, M.M.J., Ramli, N., Jamion, N.A., Baharin, S.N.A., Marimuthu, T., Sambasevam, K.P.
• Format: Article
• Published: Akademi Sains Malaysia 2020
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85087768754&partnerID=40&md5=cad20fe19e4e0312b7fe75790ed24801; http://eprints.utp.edu.my/32440/
• Institution: Universiti Teknologi Petronas

Commercial polyaniline/mussel shell (cPANI/MS) and lab-synthesized polyaniline/mussel shell (sPANI/MS) composites were prepared in order to study the sensor performances in ammonia gas detection. Both cPANI/MS and sPANI/MS were characterized using Fourier transform infrared (FTIR) and Ultraviolet-Visible (UV-Vis) spectroscopy techniques. FTIR confirmed the main characteristic peaks of PANI at ~1462 cm-1 and ~1599 cm-1 which indicates benzenoid and quinoid ring, respectively. Besides that, the peaks in the range of 1417-1453 cm-1 indicates the presence of calcium carbonate within the PANI matrix. UV-Vis spectra further confirmed both PANI composites are in the doped state by exhibiting the characteristic peak at ~790-820 nm. Sensor performance of cPANI/MS was studied in different concentrations of ammonia gas (10-100 ppm). In conclusion, it is possible to prepare waste mussel shells as a composite material with PANI in order to apply it as a gas sensor. © 2020 Akademi Sains Malaysia.