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Issue 9, 2019
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A rapid-response room-temperature planar type gas sensor based on DPA-Ph-DBPzDCN for the sensitive detection of NH3

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Abstract

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 100 ppm 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.

Graphical abstract: A rapid-response room-temperature planar type gas sensor based on DPA-Ph-DBPzDCN for the sensitive detection of NH3

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Publication details

The article was received on 10 Nov 2018, accepted on 18 Jan 2019 and first published on 21 Jan 2019


Article type: Paper
DOI: 10.1039/C8TA10840D
Citation: J. Mater. Chem. A, 2019,7, 4744-4750

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    A rapid-response room-temperature planar type gas sensor based on DPA-Ph-DBPzDCN for the sensitive detection of NH3

    J. He, X. Yan, A. Liu, R. You, F. Liu, S. Li, J. Wang, C. Wang, P. Sun, X. Yan, B. Kang, J. He, Y. Wang and G. Lu, J. Mater. Chem. A, 2019, 7, 4744
    DOI: 10.1039/C8TA10840D

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