TY - JOUR
T1 - Nitrogen-doped ZnO microspheres with a yolk-shell structure for high sensing response of triethylamine
AU - Sun, Yangyang
AU - Fan, Huiqing
AU - Zhu, Shuwen
AU - Wang, Hui
AU - Dong, Wenqiang
AU - Al-Bahrani, Mohammed
AU - Wang, Weijia
AU - Ma, Longtao
N1 - Publisher Copyright:
© 2023 Elsevier B.V.
PY - 2023/8/15
Y1 - 2023/8/15
N2 - Triethylamine is a kind of volatile organic compounds, which is harmful and toxic to the environment and people. Therefore, triethylamine gas sensors are increasingly demanded in practical applications. In this work, we synthesized the nitrogen-doped ZnO yolk-shell microspheres with mesoporous distribution by a facile strategy of hydrothermal-annealing. The influence of the amount of hexamethylene tetramine on the morphology of yolk-shell ZnO was studied and the yolk-shell ZnO (YSZ-3) prepared with 0.3 g hexamethylene tetramine showed the best gas sensing performances for triethylamine at 370 ℃. The response to 100 ppm triethylamine was 133. Moreover, a low triethylamine detection limit was achieved (1 ppm), with a response value of 2.6. The prepared yolk-shell ZnO showed an excellent selectivity to triethylamine, over ethanol, methanol, acetone, formaldehyde, ammonia, and toluene. Furthermore, YSZ-3 offered a low theoretical detection limit (42.4 ppb) and a fast response and recovery (20 s/5 s). Finally, the growth mechanism and gas sensing mechanism of yolk-shell ZnO were discussed.
AB - Triethylamine is a kind of volatile organic compounds, which is harmful and toxic to the environment and people. Therefore, triethylamine gas sensors are increasingly demanded in practical applications. In this work, we synthesized the nitrogen-doped ZnO yolk-shell microspheres with mesoporous distribution by a facile strategy of hydrothermal-annealing. The influence of the amount of hexamethylene tetramine on the morphology of yolk-shell ZnO was studied and the yolk-shell ZnO (YSZ-3) prepared with 0.3 g hexamethylene tetramine showed the best gas sensing performances for triethylamine at 370 ℃. The response to 100 ppm triethylamine was 133. Moreover, a low triethylamine detection limit was achieved (1 ppm), with a response value of 2.6. The prepared yolk-shell ZnO showed an excellent selectivity to triethylamine, over ethanol, methanol, acetone, formaldehyde, ammonia, and toluene. Furthermore, YSZ-3 offered a low theoretical detection limit (42.4 ppb) and a fast response and recovery (20 s/5 s). Finally, the growth mechanism and gas sensing mechanism of yolk-shell ZnO were discussed.
KW - Gas sensing
KW - Growth mechanism
KW - N-doped ZnO
KW - Triethylamine
KW - Yolk-shell structure
UR - http://www.scopus.com/inward/record.url?scp=85154034680&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2023.133882
DO - 10.1016/j.snb.2023.133882
M3 - 文章
AN - SCOPUS:85154034680
SN - 0925-4005
VL - 389
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
M1 - 133882
ER -