from the conferences organized by TANGER Ltd.
Detection of hurtful and noxious gases has become more and more crucial for the environmental monitoring, manufacturing/monitoring of industrial products and for human health safety. Into this bargain, an innovative ammonia (NH3) gas sensor based on ternary composites of ZnO/PPy-Ag, deposited in ITO-PET thin film was successfully synthesized via photopolymerization process. The chemical structural state and morphology of ZnO/PPy-Ag (0.5 to 3M), PPy-Ag (1M) and ZnO nanofibers samples were fully revealed by Fourier Transform Infrared spectroscopy (FTIR-ATR), RAMAN Spectroscopy and Scanning Electron Microscopy (SEM), confirming its successful fabrication. The electrical conductivity was carried out using the common four probes method. Obviously, the ternary ZnO/PPy-Ag (1M) composites sensor exhibited a highest conductivity of 0.699 S.cm-1 with an extremely low detecting level. Moreover, the composites ternary layers showed an ultra-fast response/recovery time at room temperature and robust operation reproducibility during five cycles. Meanwhile, the experimental results promising an alternative approach for the production of a new ternary materials and a novel insight for high-performance ammonia sensing applications.
Keywords: Thin film, ammonia, gas sensor, ternary composites© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.