Materials Advances, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 6, 2024
EtOH oxidation at ∼55% humidity over Ba 0.98 Sr 0.02 Sn 0.95 Mn 0.05 O 3 is enhanced. The electrons from interact with the adsorbed oxygen molecules, forming species which ethanol to give CO 2 and H O.
Language: Английский
ACS Omega, Journal Year: 2025, Volume and Issue: 10(14), P. 13780 - 13796
Published: April 1, 2025
Perovskite oxide-based materials (ABO3) have gained much attention as promising candidates for advanced gas-sensing applications due to their versatile structures, tunable properties, and excellent stability. This review discusses recent developments in the synthesis, structural optimization, functionalization of perovskites enhance performance. Strategies such doping, creating oxygen vacancies, tuning morphology, forming heterojunctions significantly improved sensitivity, selectivity, response, recovery times. Specific advances include incorporation nanostructures, porous morphologies, catalytic elements, which optimized adsorption desorption processes various target gases, including volatile organic compounds, NO2, CO2. Mechanistic insights into role surface defects, charge carrier dynamics are also addressed. These position perovskite important components next-generation gas sensors environmental monitoring industrial applications.
Language: Английский
Citations
0
Sensors, Journal Year: 2025, Volume and Issue: 25(9), P. 2790 - 2790
Published: April 28, 2025
In this work, we report the synthesis of perovskite-type Ba-doped LaFeO3 (La1−xBaxFeO3, x = 0.00, 0.02, 0.04, and 0.06) nanofibers (NFs) using electrospinning method. The synthesized La1−xBaxFeO3 materials have a fibrous structure with an average fiber diameter 250 nm. fibers, in turn, consist smaller crystalline particles 20–50 nm size. sensor properties were studied when detecting 20 ppm CO, CH4, methanol, acetone dry air temperature range 50–350 °C. Doping barium leads to significant increase response decrease operating volatile organic compounds (VOCs). process oxidation on surface most sensitive La0.98Ba0.02FeO3 material was situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) temperature-programmed desorption combination mass spectrometry (TPD-MS). A mechanism for signal formation is proposed.
Language: Английский
Citations
0
Langmuir, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 27, 2025
Oxygen vacancies play a crucial role in charge transport and surface states semiconductor metal oxides, significantly influencing various research fields, such as photocatalysis gas sensor. Developing effective strategies to generate oxygen thereby enhance device performance is highly desirable. In this study, we proposed water-based one-step electrospinning method introduce hydroxyl groups, leading the synthesis of Pt-decorated WO3 nanofibers (Pt-WO3(H2O)) with increased vacancies. Density functional theory calculations revealed that dissociation energy W-OH lower than W-O bonds, promoting formation via bond cleavage. These reduced adsorption acetone on surface, enhancing interactions. Consequently, Pt-WO3(H2O) sensor exhibited an ultrahigh response 82 1.8 ppm at 300 °C, which was about 1 order magnitude higher one fabricated by conventional electrospinning. findings indicate technique for generating oxide nanofibers. Our high-performance sensor, capable detecting low concentrations, holds great potential applications noninvasive health screening.
Language: Английский
Citations
0
Materials Advances, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 6, 2024
EtOH oxidation at ∼55% humidity over Ba 0.98 Sr 0.02 Sn 0.95 Mn 0.05 O 3 is enhanced. The electrons from interact with the adsorbed oxygen molecules, forming species which ethanol to give CO 2 and H O.
Language: Английский
Citations
0