期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 7, 期 9, 页码 4744-4750出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta10840d
关键词
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资金
- National Nature Science Foundation of China [61831011, 61327804, 61520106003, 61803171, 61833006]
- Program for Chang Jiang Scholars and Innovative Research Team in University [IRT13018]
- Young Elite Scientists Sponsorship Program by CAST [2018QNRC001]
- Application and Basic Research of Jilin Province [20130102010JC]
- Program for JLU Science and Technology Innovative Research Team [JLUSTIRT 2017TD-07]
- Fundamental Research Funds for the Central Universities, China Postdoctoral Science Foundation [2018M630322]
The development of rapid-response gas sensors for the detection of NH3 gas at room temperature still remains a huge challenge and is limited by the poor room-temperature sensing materials and their unsatisfactory sensing characteristics. Herein, an organic semiconductor, 3,6-bis(4-(diphenylamino)phenyl)dibenzo[a,c]pyrazine-11,12-dinitrile (DPA-Ph-DBPzDCN),-based planar type sensor was successfully developed for the detection of NH3 at room temperature. Moreover, the DPA-Ph-DBPzDCN NH3 sensor displayed satisfactory properties including significant response/recovery characteristic, selectivity and stability under the effect of relative humidity. Especially, at 98% RH, it had the highest response value of 72.73% to 100ppm NH3, and the detection limit could be as low as 2 ppm. Furthermore, the sensor showed the rapid response and recovery times of 48 s and 15 s to 20 ppm NH3, respectively, good repeatability and stability. In addition, the excellent gas-sensing property of DPA-Ph-DBPzDCN was explained and attributed to the interaction between NH3 and the N-group of DPA-Ph-DBPzDCN. These results obtained from a series of studies provide a new strategy and methodology for the development of room-temperature ammonia gas sensors.
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