Sensor Performance of H2SO4 Doped Polyaniline (PAni) in Ethylenediamine (EDA) Detection

Cheah, Pik Yan (2022) Sensor Performance of H2SO4 Doped Polyaniline (PAni) in Ethylenediamine (EDA) Detection. Final Year Project (Bachelor), Tunku Abdul Rahman University College.

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Abstract

Ethylenediamine (EDA) is a basic and volatile compound that are widely used in oil and food industries. EDA pollution originates from industrial wastewater due to inadequate supervision on the disposal of toxic waste. Consequently, EDA will cause allergic reactions and asthmatic attack on humans when overexposed with EDA. Therefore, it is important to develop a sensor to monitor the EDA level present in the air. Herein, Polyaniline (PAni) was introduced as an EDA sensor due to its low cost, easy processability, and high electrical conductivity. In this project, we reported the synthesis of PAni doped with sulphuric acid (H2SO4) at 0°C and 25°C. Characterization of PAni/H2SO4 will be conducted by using Fourier transform infrared (FT-IR), ultraviolet-visible (UV-Vis) spectrometer and resistivity meter. Electrical conductivity of PAni/H2SO4 (0°C) (0.0233 S/cm) is far better than PAni/H2SO4 (25°C) (0.0000754 S/cm) due to longer and more linear conjugated backbone that facilitate the movement of