Gas Sensing Property of LaFeO 3 Based Nanomaterials and Its Application in Vehicle Air Monitoring

Formaldehyde sensors for vehicles are currently one of the key research areas in the automotive industry. In this work, Co doped LaFeO 3 composite materials were successfully prepared using citric acid complexation method. The results indicate that the LaFeO 3 -0.3 sample, with a doping ratio of 3:7, exhibited a spherical structure characterized by surface porosity. Benefiting from its superior morphological structure, LaFeO 3 -0.3 demonstrated the best gas sensing performance. The superior gas sensing performance of LaFeO 3 -0.3 can be attributed to its unique morphological structure, which provides an increased number of active sites for gas molecule adsorption. Furthermore, its larger pores facilitate the storage of gas molecules, thereby enhancing the gas sensing performance.