TY - JOUR
T1 - Hierarchical porous LaFeO3 nanostructure for efficient trace detection of formaldehyde
AU - Yang, Kai
AU - Ma, Jingzhou
AU - Qiao, Xiaokang
AU - Cui, Yawei
AU - Jia, Lichao
AU - Wang, Hongqiang
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/6/15
Y1 - 2020/6/15
N2 - Metal oxide based gas sensing is promising to realize the effective detection of formaldehyde from the breathing gas, which is of great significance to lung cancer monitoring in the budding period. Seeking for novel materials with controlled microstructure and surface characteristics, while improving the sensing limit is still a highly desirable challenge. In this work, the hierarchical porous LaFeO3 is explored for this purpose by using a low-cost, simple and mature method. By tuning the quantity of F108 structuring agent and calcined temperature, the corresponding gas-sensing properties can be adjusted and optimized. The results indicate that the LaFeO3 with 0.5 g F108 possess the best gas-sensing property with sensing response of 116 toward 50 ppm formaldehyde at 125 °C. Importantly, the trace detection capacity is as low as 50 ppb, which is among the lowest value in the record of formaldehyde detection. Further detailed analysis indicates that the special hierarchical porous structure with high surface area and pore volume should be responsible for the improved sensing performance. These results suggest that construct hierarchical porous structure is a promising method to attain superior gas-sensing properties and LaFeO3 can be potentially used for accurate, inexpensive, real-time, and painless detection of lung cancer.
AB - Metal oxide based gas sensing is promising to realize the effective detection of formaldehyde from the breathing gas, which is of great significance to lung cancer monitoring in the budding period. Seeking for novel materials with controlled microstructure and surface characteristics, while improving the sensing limit is still a highly desirable challenge. In this work, the hierarchical porous LaFeO3 is explored for this purpose by using a low-cost, simple and mature method. By tuning the quantity of F108 structuring agent and calcined temperature, the corresponding gas-sensing properties can be adjusted and optimized. The results indicate that the LaFeO3 with 0.5 g F108 possess the best gas-sensing property with sensing response of 116 toward 50 ppm formaldehyde at 125 °C. Importantly, the trace detection capacity is as low as 50 ppb, which is among the lowest value in the record of formaldehyde detection. Further detailed analysis indicates that the special hierarchical porous structure with high surface area and pore volume should be responsible for the improved sensing performance. These results suggest that construct hierarchical porous structure is a promising method to attain superior gas-sensing properties and LaFeO3 can be potentially used for accurate, inexpensive, real-time, and painless detection of lung cancer.
KW - Gas sensor
KW - Hierarchical porous structure
KW - LaFeO formaldehyde
KW - Sol-gel method
UR - http://www.scopus.com/inward/record.url?scp=85083014376&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2020.128022
DO - 10.1016/j.snb.2020.128022
M3 - 文章
AN - SCOPUS:85083014376
SN - 0925-4005
VL - 313
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
M1 - 128022
ER -