Fabrication of Pt functionalized LaFeO3 porous structures for highly sensitive detection of formaldehyde

LaFeO 3 has been widely investigated as formaldehyde sensing material due to its enhanced performance. However, several disadvantages including the response/recovery speed, selectivity, and detection limit mortally restrict its practical applications. Along these lines, herein, platinum (Pt) functionalized LaFeO 3 porous structures were synthesized to optimize the sensing properties. The sensing test revealed that the best response value of Pt functionalized LaFeO 3 was around 2.5 times over that of the pristine material at the operating temperature of 125   o C. Meanwhile, the sensor also possessed the merits of shorter response/recovery time, better selectivity, and lower detection limits. From our analysis, it was demonstrated that the abundant pore structure and the increased adsorbed oxygen level are responsible for the excellent formaldehyde monitoring properties. Our work paves the way for the development of novel Pt functionalized LaFeO 3 porous structures, which can serve as a potential candidate for formaldehyde detection in many practical applications.