Chemo-Electrical Gas Sensors Based on LaNiMoSe2 in Graphene and Conducting Polymer PANI Composite Semiconductor Nanocomposite

In this work, we demonstrate effective microwave synthesis of quaternary nanocomposites containing graphene, directing polymer PANI nanoparticles, and LaNiMoSe2. We describe the use of LaNiMoSe2-G-PANI composite materials to devise an amperometric sensor for detection of HCl, HNO3, and NH3. Specialized electrodes were coated with LaNiMoSe2-G-PANI as an active sensor material using a cyclic voltammogram. The results show the excellent capacity of PANI for joining of the functionalized GO species. With various fixations, it is important to distinguish HCl, HNO3, and NH3, even within the sight of oxygen as an obstruction species. The LaNiMoSe2-G-PANI electrode can be used to identify various HCl, HNO3, and NH3 concentrations in the range of 50–1000 ppm, with the bottom limit of 50 ppm imposed by the cyclic voltammogram. To measure sensitivity and selectivity, we used electrodes coated with the LaNiMoSe2-G-PANI composite at locations containing HCl, HNO3, and NH3, without pretreatment. LaNiMoSe2-G-PANI as an active sensing material showed excellent detection ability with reproducibility.