Ceramics International, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 1, 2024
Language: Английский
Journal of Alloys and Compounds, Journal Year: 2024, Volume and Issue: unknown, P. 177715 - 177715
Published: Nov. 1, 2024
Language: Английский
Citations
6
Sensors, Journal Year: 2024, Volume and Issue: 24(21), P. 6797 - 6797
Published: Oct. 23, 2024
Gas sensors are essential for safety and quality of life, with broad applications in industry, healthcare, environmental monitoring. As urbanization industrial activities intensify, the need advanced air monitoring becomes critical, driving demand more sensitive, selective, reliable sensors. Recent advances nanotechnology, particularly 1D nanostructures like nanofibers nanowires, have garnered significant interest due to their high surface area improved charge transfer properties. Electrospinning stands out as a promising technique fabricating these nanomaterials, enabling precise control over morphology leading exceptional attributes, including sensitivity, rapid response, excellent stability harsh conditions. This review examines current research on chemoresistive gas based produced by electrospinning. It focuses how composition nanomaterials influence key sensor characteristics-sensitivity, selectivity, stability. The highlights recent advancements incorporating metal oxides, carbon conducting polymers, along modifications enhance performance. also explores use fiber-based composite materials detecting oxidizing, reducing, volatile organic compounds. These composites leverage properties various achieve sensitivity allowing detection wide range gases diverse further addresses challenges scaling up production suggests future directions overcome technological limitations improve performance both domestic applications.
Language: Английский
Citations
3
ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 2, 2025
Conventional metal oxide semiconductor (MOS) gas sensors have an inherent disadvantage of high operating temperatures and low sensitivity to weakly polarized gases, such as methane. This study mainly focuses on developing specialized MOS-based for the highly sensitive detection Therefore, we designed prepared Co3O4-based nanocomposites La-CoOx/N/C via pyrolysis a La-doped zeolitic imidazolate framework (ZIF-67) hydrothermally grown carbon black (CB) nanospheres. The resulting material is dominated by hollow nanospheres, owing CB pyrolysis. In as-formed nanocomposite, dispersed La2O3 acts "fence" prevent agglomeration Co3O4 nanoparticles form rich heterojunctions. Meanwhile, N-coordinated (N/C) anchor La-CoOx attachment, which further improves dispersion composite oxides enhances their adsorption capacity methane molecules. Consequently, sensor demonstrated response 1.25 with 4/5 s recovery/response times 600 ppm at relatively temperature (130 °C). Furthermore, methane-sensing mechanism based heterostructure effects first-principles calculations. proposed device that exhibits excellent sensing performance without requiring precious metals.
Language: Английский
Citations
0
Published: Jan. 1, 2025
The construction of crystalline-amorphous heterogeneous phase interfaces is an effective strategy to enhance their surface active sites. We successfully synthesised amorphous Pt-crystalline Cu (aPtcCu) nanospheres for ultrasensitive H2 detection. Cu2+ first reduced in the oleylamine−ascorbic acid (OAm-AA) solvent system due inhibition Pt reduction. Next Pt2+ by electrocoupling substitution already and amorphisation achieved strong OAm adsorption. gas sensing test results show that aPtcCu/ZnO sensor has higher response lower working temperature (160 oC) than Pt/ZnO (180 ZnO (240 oC). Moreover, can detect as low 2 ppm response/recovery time only s/6 s. significantly sensitization characteristic aPtcCu be attributed following: 1) more site on Pt; 2) crystalline/amorphous heterophase interface separates electrons holes, which further catalytic activity aPtcCu; 3) Pt4+ ↔ accelerates reaction surface. prepared expected a candidate monitoring hydrogen leakage, provides new direction application amorphous/crystalline sensitizers sensors.
Language: Английский
Citations
0
Sensors and Actuators A Physical, Journal Year: 2025, Volume and Issue: unknown, P. 116233 - 116233
Published: Jan. 1, 2025
Language: Английский
Citations
0
Frontiers in Chemistry, Journal Year: 2025, Volume and Issue: 13
Published: Feb. 25, 2025
Resistive type gas sensors based on wide-bandgap semiconductor oxides are remaining one of the principal players in environmental air monitoring. The rapid development technology and desire to miniaturize electronics require creation devices with minimal energy consumption. A promising solution may be use photoactivation, which can initiate/accelerate physico-chemical processes at solid-gas interface realize detection flammable explosive gases close room temperature. This work examines mechanism underlying increased sensitivity various under photoactivation. review is intended clarify current situation field light-activated set vector for their further order integrate latest technological projects.
Language: Английский
Citations
0
Published: Jan. 1, 2025
Language: Английский
Citations
0
Applied Surface Science, Journal Year: 2024, Volume and Issue: 675, P. 160978 - 160978
Published: Aug. 13, 2024
Language: Английский
Citations
1
Ceramics International, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 1, 2024
Language: Английский
Citations
0