Ultra-sensitive Ag-LaFeO3 for selective detection of ethanol

Unraveling Mechanistic Differences in Optical and Electrical Sensors: Time-Resolved Operando UV–Vis Spectroscopy of p-Type Perovskite Gas Sensors

“…12 The sensing properties of these perovskites can be modified by exchanging one or both cations 11 as well as loading with noble metals such as silver. 13,14 Because LaFeO 3 and SmFeO 3 are p-type semiconducting metal oxides, in contrast to the metal oxide materials such as SnO 2 that have been much studied as gas sensors, 4 a study of the two materials additionally helps to deepen the comparatively lower fundamental understanding of p-type semiconducting gas sensor materials. 15 The aim of this work is to use continuous, time-resolved operando UV−vis spectroscopy on the time scale of 1 s (DC resistance) to 1 min (UV−vis) to simultaneously investigate changes in electrical conductance and UV−vis absorbance of LaFeO been applied to metal oxide gas sensors that show simultaneous electrical and optical sensor responses, despite the potential of even steady-state operando UV−vis spectroscopy.…”

“…For example, LaFeO 3 showed high sensitivity to acetylene with simultaneously high selectivity compared to ethylene and other saturated and unsaturated hydrocarbons as well as CO, CO 2 , and H 2 . The sensing properties of these perovskites can be modified by exchanging one or both cations as well as loading with noble metals such as silver. , Because LaFeO 3 and SmFeO 3 are p-type semiconducting metal oxides, in contrast to the metal oxide materials such as SnO 2 that have been much studied as gas sensors, a study of the two materials additionally helps to deepen the comparatively lower fundamental understanding of p-type semiconducting gas sensor materials …”

Construction of Ag‐Bridged Z‐Scheme LaFe0.5Co0.5O3/Ag10/Graphitic Carbon Nitride Heterojunctions for Photo‐Fenton Degradation of Tetracycline Hydrochloride: Interfacial Electron Effect and Reaction Mechanism

“…Silver nanoparticles (Ag NPs) are potential candidates for this purpose, as they can strongly interact with both g‐C 3 N 4 and LaFeO 3 , and promote recombination of useless electrons and holes owing to their plasmon resonance properties. [ 26,27 ]…”

“…Silver nanoparticles (Ag NPs) are potential candidates for this purpose, as they can strongly interact with both g-C 3 N 4 and LaFeO 3 , and promote recombination of useless electrons and holes owing to their plasmon resonance properties. [26,27] In this work, three-component heterojunctions containing LaFeO 3 , Ag NPs, and g-C 3 N 4 were constructed, and the properties of LaFeO 3 were optimized by replacing the Fe atoms with Co atoms (i.e., LaFe 1−x Co x O 3 ). The heterojunctions were thoroughly characterized by X-ray diffraction (XRD), thermal gravimetric analysis (TGA), N 2 physisorption at −196 °C, scanning transmission electron microscopy (STEM), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), UV-visible spectra, etc.…”

A-site non-stoichiometric defects engineering in xPt–La0.9Fe0.75Sn0.25O3−δ hollow nanofiber for high-performance formaldehyde sensor

“…Researchers have done much work on developing p-type semiconductor gas-sensing materials, such as impurity doping, 1 controlled microstructure, 2 and noble metal modification. 3 However, the materials prepared by these methods tend to be more costly, less responsive, and less stable, so it is still necessary to use novel approaches to develop efficient and durable sensing materials. According to recent reports, a strategy to induce a high concentration of oxygen vacancies by non-stoichiometric doping at the A or B site of perovskite oxide has been extensively followed in diverse research areas.…”