Quaternary nanorod-type BaInSbSe5 semiconductor combined graphene-based conducting polymer (PPy) nanocomposite and highly sensing performance of H2O2 & H2S gases

• Main Authors: Oh, Won-Chun, Lim, Chang Sung, Liu, Yin, Sagadevan, Suresh, Jang, Won Kweon, Biswas, Md Rokon Ud Dowla
• Format: Article
• Published: 2021
• Subjects: Q Science (General)
• Online Access: http://eprints.um.edu.my/26230/; https://doi.org/10.1007/s10854-021-06145-5

Quaternary nanorod-type BaInSbSe5 semiconductor combined graphene-based conducting polymer (PPy) (BaInSbSe5-G-PPy, BNSGP) nanocomposites were prepared using a facile hydrothermal method. BNSGP nanocomposites were used to make up gas sensors to detect H2O2 and H2S at standard temperature condition. Morphologies, shape, and structures of BNSGP were specified by X-ray diffractometer (XRD), Scanning Electron Microscopy (SEM), Energy-dispersive X-ray elemental analyzer (EDX), transmission electron microscopy (TEM), high-resolution TEM (HRTEM) technique, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and diffuse reflectance spectroscopy (DRS). When examined with H2O2 and H2S concentrations as low as 10 ppb, the gas sensor using BNSGP nanocomposites showed a good reactivity and sensitivity of 1.25 V/K with real-time response/recovery effects of 234 and 76 s, respectively. It also showed a conspicuously high selectivity for H2O2 and H2S. However, it only showed insignificant response to any other reactance gases such as HCl, CH3OH, and C2H5OH. Its performance as a H2O2 and H2S sensor was estimated by CV meter (cyclic voltammeter). The fabricated sensor for H2O2 and H2S showed an extensive linear selectivity from 300 to 90 ppm with a low detection range of 300 ppm.