期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 284, 期 -, 页码 444-450出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.12.144
关键词
Gas sensor; Miniaturized gas chromatography; Al-doped ZnO quantum dots; 2-CEES; Mustard simulant; Packed column
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF)
- Ministry of Science, ICT & Future Planning [NRF-2017M3A9F1052297]
- Medium and Large Complex Technology Commercialization Project through the Commercializations Promotion Agency for R&D Outcomes - Ministry of Science and ICT
We report a new portable chemical warfare agent analyzer for miniaturized gas chromatography (mini-GC), comprising a packed column and hydrothermally synthesized Al-doped ZnO quantum dots (AZO QDs). This device uses a small volume of the target gas (1 ml) without pre-concentration and can be used to detect 2-chloroethyl ethyl sulfide (2-CEES) gas, which is a mustard gas simulant, over a wide concentration range. The AZO QD ((-)5 nm) sensor exhibited an outstanding sensing response (R) of 5,393 in detecting 20 ppm of 2-CEES; this performance is superior to those of other previously reported 2-CEES sensors based on semiconducting metal oxides. By optimizing the length of the packed column, we successfully decreased the retention time of 2-CEES to (-)150 s. More importantly, the manufactured mini-GC device can be used to selectively detect a small amount of target gas from other gases such as NH3, NO, and CO. We demonstrated the excellent detection performance of the device for the real-time selective detection of 2-CEES.
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