TY - JOUR
T1 - High Performance Acoustic Wave Nitrogen Dioxide Sensor with Ultraviolet Activated 3D Porous Architecture of Ag-Decorated Reduced Graphene Oxide and Polypyrrole Aerogel
AU - Xiong, Shuo
AU - Zhou, Jian
AU - Wu, Jianhui
AU - Li, Honglang
AU - Zhao, Wei
AU - He, Chengguang
AU - Liu, Yi
AU - Chen, Yiqin
AU - Fu, Yongqing
AU - Duan, Huiguo
N1 - Funding information: This work was supported by the General Program of National Natural Science Foundation of China (No. 52075162), the Key Research Project of Hunan Province (2019GK2111), the Innovation Leading Program of New and High-tech Industry of Hunan Province (2020GK2015), the Key Research Project of Guangdong Province (2020B0101040002), the GDAS Project of Science and Technology Development (Nos. 2018GDASCX-0112, 2019GDASYL-0503007), and the Natural Science Foundation of Changsha (kq2007026), as well as the Engineering Physics and Science Research Council of UK (EPSRC EP/P018998/1).
PY - 2021/9/8
Y1 - 2021/9/8
N2 - Surface acoustic wave (SAW) devices have been widely explored for real-time monitoring of toxic and irritant chemical gases such as nitrogen oxide (NO2), but they often have issues such as a complicated process of the sensing layer, low sensitivity, long response time, irreversibility, and/or requirement of high temperatures to enhance sensitivity. Herein, we report a sensing material design for room-temperature NO2 detection based on a 3D porous architecture of Ag-decorated reduced graphene oxide-polypyrrole hybrid aerogels (rGO-PPy/Ag) and apply UV activation as an effective strategy to further enhance the NO2 sensing performance. The rGO-PPy/Ag-based SAW sensor with the UV activation exhibits high sensitivity (127.68 Hz/ppm), fast response/recovery time (36.7 s/58.5 s), excellent reproducibility and selectivity, and fast recoverability. Its enhancement mechanisms for highly sensitive and selective detection of NO2 are based on a 3D porous architecture, Ag-decorated rGO-PPy, p-p heterojunction in rGO-PPy/Ag, and UV photogenerated carriers generated in the sensing layer. The scientific findings of this work will provide the guidance for future exploration of next-generation acoustic-wave-based gas sensors.
AB - Surface acoustic wave (SAW) devices have been widely explored for real-time monitoring of toxic and irritant chemical gases such as nitrogen oxide (NO2), but they often have issues such as a complicated process of the sensing layer, low sensitivity, long response time, irreversibility, and/or requirement of high temperatures to enhance sensitivity. Herein, we report a sensing material design for room-temperature NO2 detection based on a 3D porous architecture of Ag-decorated reduced graphene oxide-polypyrrole hybrid aerogels (rGO-PPy/Ag) and apply UV activation as an effective strategy to further enhance the NO2 sensing performance. The rGO-PPy/Ag-based SAW sensor with the UV activation exhibits high sensitivity (127.68 Hz/ppm), fast response/recovery time (36.7 s/58.5 s), excellent reproducibility and selectivity, and fast recoverability. Its enhancement mechanisms for highly sensitive and selective detection of NO2 are based on a 3D porous architecture, Ag-decorated rGO-PPy, p-p heterojunction in rGO-PPy/Ag, and UV photogenerated carriers generated in the sensing layer. The scientific findings of this work will provide the guidance for future exploration of next-generation acoustic-wave-based gas sensors.
KW - 3D porous architecture
KW - NO sensor
KW - SAW
KW - UV
KW - rGO-PPy/Ag
UR - http://www.scopus.com/inward/record.url?scp=85114637756&partnerID=8YFLogxK
U2 - 10.1021/acsami.1c13309
DO - 10.1021/acsami.1c13309
M3 - Article
SN - 1944-8244
VL - 13
SP - 42094
EP - 42103
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 35
ER -