期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 305, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2019.127456
关键词
Melamine-formaldehyde; Sponge; In(2)O(3)nanosheets; Gas sensor; Chorine
资金
- NPU Fundamental Research Funds for the Central Universities [3102019GHXM002, 3102019MS0401]
- National Nature Science Foundation [51672220, 51902259, 51902258]
- SKLSP Project of China [2019-TZ-04]
- National Defense Science Foundation [32102060303]
- HPU Open-end Fund of International Joint Research Laboratory of Henan Province for Underground Space Development and Disaster Prevention
Chlorine (Cl-2) gas sensors with outstanding gas response and ultra-low detection limit by an easy and economical fabrication are increasingly in demand in practical application. In this work, In2O3 nanosheets with excellent gas sensing properties for Cl-2 have been successfully synthesized using melamine-formaldehyde (MF) sponge as the template via a simple soak-drying-calcination approach. The gas response (R-gas/R-air) of In2O3 nanosheets sensor is up to 2353.4 toward 3 ppm Cl-2 at 200 degrees C, which is about 158 times compared with In2O3 particles (14.9). The selectivity to Cl-2 reaches up to 254.3 against other interferential gases. Additionally, the sensor based on In2O3 nanosheets displays extremely low detection limit of 0.037 ppb. Such excellent gas sensing performance is primarily ascribed to the unique sheet structure and abundant oxygen vacancies which are formed during the removal of MF sponge template. Therefore, the In2O3 nanosheets sensor shows great potential in Cl-2 detection.
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