Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 444-450 |
| Number of pages | 7 |
| Journal | Sensors and Actuators, B: Chemical |
| Volume | 284 |
| DOIs | |
| Publication status | Published - 2019 Apr 1 |
Bibliographical note
Funding Information:This work was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), and it was funded by the Ministry of Science, ICT & Future Planning ( NRF-2017M3A9F1052297 ) and the Medium and Large Complex Technology Commercialization Project through the Commercializations Promotion Agency for R&D Outcomes funded by the Ministry of Science and ICT .
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Instrumentation
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Metals and Alloys
- Electrical and Electronic Engineering
- Materials Chemistry