TY - JOUR
T1 - Ti2CTx MXene
T2 - A novel p-type sensing material for visible light-enhanced room temperature methane detection
AU - Wang, Jing
AU - Xu, Ruiqi
AU - Xia, Yi
AU - Komarneni, Sridhar
N1 - Funding Information:
This work was supported by National Natural Science Foundation of China (Nos. 51802123 , 62101225 ) and the Natural Science Foundation of Jiangsu Province (No. BK20180630 ).
Publisher Copyright:
© 2021 Elsevier Ltd and Techna Group S.r.l.
PY - 2021
Y1 - 2021
N2 - The development of semiconductor-based room-temperature methane (CH4) gas sensors is appealing but challenging. Herein, we report a CH4 gas sensor operating at room temperature based on Ti2CTx MXene, a novel p-type sensing material, achieving high-performance CH4 detection with visible light assistance. The Ti2CTx MXene based device showed more than seven-fold improvement for CH4 detection under visible-light irradiation, and the response/recovery times were also sharply decreased. The excellent CH4 sensing performance at room temperature could be attributed to the visible-light photocatalytic CH4 oxidation activity of the Ti2CTx sensing material. CH4 oxidation was revealed by photocatalytic measurement, O2-TPD and in-situ IR spectroscopies. The present work demonstrates the novel application of Ti2CTx MXene as a promising p-type sensing material for methane detection at room temperature. Moreover, the concept of “photocatalysis-enhanced gas sensing” can be employed in room-temperature gas sensors based on other novel semiconductors.
AB - The development of semiconductor-based room-temperature methane (CH4) gas sensors is appealing but challenging. Herein, we report a CH4 gas sensor operating at room temperature based on Ti2CTx MXene, a novel p-type sensing material, achieving high-performance CH4 detection with visible light assistance. The Ti2CTx MXene based device showed more than seven-fold improvement for CH4 detection under visible-light irradiation, and the response/recovery times were also sharply decreased. The excellent CH4 sensing performance at room temperature could be attributed to the visible-light photocatalytic CH4 oxidation activity of the Ti2CTx sensing material. CH4 oxidation was revealed by photocatalytic measurement, O2-TPD and in-situ IR spectroscopies. The present work demonstrates the novel application of Ti2CTx MXene as a promising p-type sensing material for methane detection at room temperature. Moreover, the concept of “photocatalysis-enhanced gas sensing” can be employed in room-temperature gas sensors based on other novel semiconductors.
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U2 - 10.1016/j.ceramint.2021.08.357
DO - 10.1016/j.ceramint.2021.08.357
M3 - Article
AN - SCOPUS:85114239196
SN - 0272-8842
JO - Ceramics International
JF - Ceramics International
ER -