Surface modification by employing precious metals is one of the most effective ways to improve the gas-sensing performance of metal oxide semiconductors (MOS). Pure α-Fe2O3 nanoparticles and Pt-modified α-Fe2O3 nanoparticles were prepared sequentially using a rather simple hydrothermal synthesis and impregnation method. Compared with the original α-Fe2O3 nanomaterials, the Pt-α-Fe2O3 nanocomposite sensor shows a higher response value (Ra / Rg= 58.6) and a shorter response/recovery time (1 s / 168 s) to 100 ppm DMDS gas at 375 °C. In addition, it has better selectivity to dimethyl disulfide (DMDS) gas with the value of more than 9 times higher than the other target gases at 375 °C. This study indicates that the Pt-α-Fe2O3 nanoparticle sensor has good prospects and can be used as a low-cost and effective DMDS gas sensor.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.