期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 9, 期 48, 页码 17496-17503出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1tc04678k
关键词
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资金
- National Natural Science Foundation of China [12004002]
- Anhui Provincial Natural Science Foundation [1908085QF251, 2008085MF210]
- Foundation for Introduction of High-Level Talents of Anhui University [S020118002/061]
- Support Project of Outstanding Young Talents in Anhui Provincial Universities [gxyqZD2018006]
This study successfully produced a novel WO3/WS2 van der Waals heterostructured material with excellent sensing performance for 2-chloroethyl ethyl sulfide. The sensor exhibited high selectivity to the target gas, rapid response and recovery time, as well as good stability, making it a potential sensing material for dichlorodiethyl sulfide detection.
In the process of organic synthesis, some toxic and harmful gases are sometimes used and produced. The leakage of these gases is extremely harmful to human health and the environment. Realizing highly selective detection of toxic gas is very important, as it can prevent the potential hazardous effect of the toxic gas. This work is an attempt to produce highly selective sensing materials for detecting 2-chloroethyl ethyl sulfide (2-CEES, dichlorodiethyl sulfide simulation). A novel WO3/WS2 van der Waals heterostructured material is controllably constructed by simply annealing WS2 nanosheets in air. Through the optimization of the oxidation temperature, it is found that a gas sensor based on the WO3/WS2 composite material (annealing at a temperature of 500 degrees C for 1 hour) exhibits excellent sensing performance in the detection of 2-CEES. In more detail, the sensor has a response of 81% to 5.7 ppm 2-CEES at an optimal operating temperature of 240 degrees C, a rapid response/recovery time (20 s/55 s), excellent reproducibility and satisfactory stability. Most importantly, the sensor shows high selectivity to 2-CEES compared with ammonia, common VOC gases (acetone and ethanol) and other toxic gas simulation gases [dimethyl methylphosphonate (DMMP), dichloromethane and acetonitrile]. The above-mentioned excellent sensing performance makes WO3/WS2 a potential sensing material for dichlorodiethyl sulfide.
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