Fabrication of Fast Response and Recovery NiFeAl3+ Nanocomposite Gas Sensor for Detection of Dimethyl Methyl Phosphonate

• Published in: Journal of electronic materials 2022-08, Vol.51 (8), p.4456-4464
• Main Authors: Dipak, Pukhrambam, Samadhiya, Anuradha, Kumar, Neeraj, Singh, Pukhrambam Akash, Tiwari, Dinesh Chandra, Verma, Udai Pratap
• Format: Article
• Language: English
• Subjects: Aluminum; Characterization and Evaluation of Materials; Chemicals; Chemistry and Materials Science; Electronics and Microelectronics; Fourier transforms; Gas sensors; Humidity; Infrared analysis; Instrumentation; Laboratories; Materials Science; Metal oxides; Nanocomposites; Nickel ferrites; Optical and Electronic Materials; Original Research Article; Phosphonates; Recovery time; Relative humidity; Sarin; Scanning electron microscopy; Sensors; Solid State Physics; Synthesis; Thermogravimetric analysis; X-ray diffraction
• ISSN: 0361-5235; 1543-186X
• DOI: 10.1007/s11664-022-09700-w

Aluminium-doped nickel ferrite (NiFeAl 3+ ) nanoflakes were synthesized using the hydrothermal method. This nanocomposite material was used to fabricate a high-performance gas sensor for detecting dimethyl methylphosphonate, a stimulant of sarin gas (nerve agent). The fabricated sensor demonstrated a minimum detection limit of 0.1 ppm with a sensing response of 1.25%. The sensor was stable between temperatures of 200°C and 250°C. The sensing response decreased as the relative humidity increased. The sensor achieved response and recovery time of 24 s and 38 s, respectively, at a concentration of 1 ppm (250°C). The fabricated sensor demonstrated sensitivity of 14.654 ppm −1 . The synthesized nanocomposite material was characterized by scanning electron microscopy (SEM), x-ray diffraction (XRD), Fourier transform infrared spectroscopy and thermogravimetric analysis. The SEM analysis showed the formation of flakes and cube-like structures. The XRD pattern showed the crystalline nature of the nanocomposite.