Luo Jiamin, Lu Heng, Wen Bao-Ying, Zheng Qiaowen, Zhang Junying, Li Yishan, Hong Wenping, Zhao Shanshan, Shun Libo, Li Feiming, Cai Zhixiong, Lin Jin-Ming, Chen Qiang, Zhang Maosheng, Li Jian-Feng
College of Chemistry, Chemical Engineering and Environment, Minnan Normal University, Zhangzhou 363000, China.
Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou 350116, China.
Anal Chem. 2024 Oct 1;96(39):15816-15823. doi: 10.1021/acs.analchem.4c04776. Epub 2024 Sep 22.
Methyl iodide (CHI) gas as a toxic gas causes great harm to organisms due to its high volatility and high reactivity with biological nucleophiles. Unfortunately, the sensing and detection of CHI gas are challenging because of the diffusive nature of the gases and its low concentrations in the environment. Herein, we have developed a fast, green, and sensitive CHI gas visual sensing method based on the capture technology of toxic gases by natural deep eutectic solvents (NADESs) coupled to the halide rapid exchange capability of perovskite nanocrystals (PNCs). In this strategy, NADESs are used as an absorption solution to adsorb gaseous CHI, while simultaneously exposing I through the action of the nucleophilic reagent; then, CsPbBr PNCs were synthesized in NADESs and used as sensing material to achieve I exchange. Benefiting from the capture and enrichment of CHI gas, the sensitivity of the gas sensor was highly improved. The sensor exhibited the lowest detection limit (limits of detection) of 164.15 μmol/m, below the minimum safe level for human inhalation, which is 200 μmol/m. This breakthrough offers greater possibilities for the quantitative detection of CHI gas.
