Hierarchical Nanoheterostructure of HFIP-Grafted α-Fe₂O₃@Multiwall Carbon Nanotubes as High-Performance Chemiresistive Sensors for Nerve Agents.

ABSTRACT: New and efficient sensors of nerve agents are urgently demanded to prevent them from causing mass casualties in war or terrorist attacks. So, in this work, a novel hierarchical nanoheterostructure was synthesized via the direct growth of α-Fe₂O₃ nanorods onto multiwall carbon nanotube (MWCNT) backbones. Then, the composites were functionalized with hexafluoroisopropanol (HFIP) and successfully applied to detect dimethyl methylphosphonate (DMMP)-sarin simulant gas. The observations show that the HFIP-α-Fe₂O₃@MWCNT hybrids exhibit outstanding DMMP-sensing performance, including low operating temperature (220 °C), high response (6.0 to 0.1 ppm DMMP), short response/recovery time (8.7 s/11.9 s), as well as low detection limit (63.92 ppb). The analysi

SUBMITTER: Wang X 

PROVIDER: S-EPMC10857011 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature