期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 282, 期 -, 页码 659-664出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.11.124
关键词
(C4H9NH3)(2)PbI4; Organic-inorganic; Layered perovskite; p-Xylene; Gas sensor; Physisorption
资金
- National Natural Science Foundation of China [21401139, 21271139]
- Tianjin Municipal Natural Science Foundation [15JCQNJC02900]
A novel organic-inorganic layered perovskite compound (C4H9NH3)(2)PbI4 has been synthesized through a simple and high-yield solution method. For the first time, this layered perovskite was used as a candidate material for gas sensors. Gas sensors based on (C4H9NH3)(2)PbI4 provided unique gas-sensing properties toward 1-800 ppm pxylene (p-C8H10) at the working temperature of 140 degrees C, including fast response, quick response-recovery, good selectivity and repeatability. The as-prepared (C4H9NH3)(2)PbI4 gas sensor can detect as low as 1 ppm concentration of p-xylene with a response of 11.8 at 140 degrees C. In situ diffuse reflectance Fourier transform infrared (DRFTIR) measurement shows that the p-xylene sensing mechanism can be mainly attributed to physical adsorption, which is different from other common gas-sensing metal oxides that are based on adsorption-redox-desorption mechanism.
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