Ultrathin two-dimensional materials: New opportunities and challenges in ultra-sensitive gas sensing

Coordination Chemistry Reviews, Journal Year: 2024, Volume and Issue: 505, P. 215691 - 215691

Published: Jan. 31, 2024

Language: Английский

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Pd Decoration with Synergistic High Oxygen Mobility Boosts Hydrogen Sensing Performance at Low Working Temperature on WO₃ Nanosheet

ACS Sensors, Journal Year: 2023, Volume and Issue: 8(11), P. 4293 - 4306

Published: Nov. 10, 2023

Pd-based materials have received remarkable attention and exhibit excellent H2 sensing performance due to their superior hydrogen storage catalysis behavior. However, the synergistic effects originated from decoration of Pd on a metal oxide support boost are ambiguous, deep investigation interaction (MSI) mechanism is still unclear. Here, model material nanoparticle-decorated WO3 nanosheet synthesized, individual fine structures can be achieved by treating it at different temperatures. Notably, Pd-WO3-300 display low working temperature (110 °C), with response (Ra/Rg = 40.63 10 ppm), high selectivity, anti-interference ability. DFT calculations detailed structural investigations confirm that moderate MSI facilitates generation mobility surface O2- (ad) species proper ratio Pd0-Pd2+ species, which significantly desorption intermediate PdHx temperatures contribute enhanced performance. Our work illustrates effect provides insight into design advanced materials.

Language: Английский

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Ultrasensitive triethylamine gas sensors with ZnSe nanospheres/nest-like Cr-doped MoO3

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 474, P. 134709 - 134709

Published: May 23, 2024

Language: Английский

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Bimetallic Au and Pd Nanoparticles Modified WO₃ Nanosheets for Enhancing the Sensitivity and Selectivity of Formaldehyde Assessment in Aquatic Products

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(17), P. 22155 - 22165

Published: April 18, 2024

Formaldehyde, a common illegal additive in aquatic products, poses threat to people's health and lives. In this study, novel metal oxide semiconductor gas sensor based on AuPd-modified WO3 nanosheets (NSs) had been developed for the highly efficient detection of formaldehyde. NS modified with 2.0% AuPd nanoparticles showed higher response (Ra/Rg = 94.2) 50 ppm formaldehyde at 210 °C, which was 36 times more than pristine NS. addition, AuPd/WO3 relatively short response/recovery time 10 s/9 s good immunity other interfering gases stability The excellent gas-sensitive performance attributed chemical sensitization Au, electronic Pd, synergistic effect bimetallic AuPd, facilitated recognition molecules. Additionally, high sensitivity broad application prospect composite-based real sample were also confirmed by using above products such as squid shrimp.

Language: Английский

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Smart Gas Sensors: Recent Developments and Future Prospective

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 17(1)

Published: Nov. 4, 2024

Abstract Gas sensor is an indispensable part of modern society with wide applications in environmental monitoring, healthcare, food industry, public safety, etc. With the development technology, wireless communication, smart monitoring terminal, cloud storage/computing and artificial intelligence, gas sensors represent future sensing due to their merits real-time multifunctional early warning function, intelligent automated feature. Various electronic optoelectronic have been developed for high-performance analysis. terminals maturity integrated flexible wearable play increasing role This review highlights recent advances diverse applications. The structural components fundamental principles are described, devices highlighted. Moreover, array intelligence algorithms “Internet Things” paradigm introduced. Finally, challenges perspectives discussed regarding need city healthy living.

Language: Английский

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Electronic and surface structure engineering of oxygen vacancies-riched WO3 nanosheets toward highly efficient BTEX sensing

Sensors and Actuators B Chemical, Journal Year: 2024, Volume and Issue: 405, P. 135357 - 135357

Published: Jan. 21, 2024

Language: Английский

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A fast response hydrogen sensor based on the heterojunction of MXene and SnO2 nanosheets for lithium-ion battery failure detection

Sensors and Actuators B Chemical, Journal Year: 2023, Volume and Issue: 405, P. 135229 - 135229

Published: Dec. 26, 2023

Language: Английский

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Advances in modification of metal and noble metal nanomaterials for metal oxide gas sensors: a review

Rare Metals, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 11, 2025

Language: Английский

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Atomic Ru Species Driven SnO₂-Based Sensor for Highly Sensitive and Selective Detection of H₂S in the ppb-Level

ACS Sensors, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 12, 2025

Timely and accurate detection of H2S is crucial for preventing serious health issues in both humans livestock upon exposure. However, metal-oxide-based sensors often suffer from mediocre sensitivity, poor selectivity, or long response/recovery time. Here, an atomic Ru species-driven SnO2-based sensor fabricated to realize highly sensitive selective at the parts per billion level as low 100 ppb. The shows a high sensing response (Rair/Rgas = 310.1) ultrafast time (less than 1 s) 20 ppm operating temperature 160 °C. Operando SR-FTIR spectroscopic characterizations DFT calculations prove that superior properties can be mainly attributed driven effect species on formation surface-adsorbed oxygen surface SnO2, which provides more active sites enhances performance SnO2 H2S. Furthermore, lab-made wireless portable monitoring system developed rapidly detect early warning, suggesting potential application system. This work novel approach fabricating gas by metal loaded metal-oxide semiconductors.

Language: Английский

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Rational Design of PdPt Nanoalloys Sensitized Mesoporous SnO₂ for High‐Performance Methane Sensing Applications

Advanced Materials Technologies, Journal Year: 2025, Volume and Issue: unknown

Published: March 8, 2025

Abstract Methane (CH 4 ) serves as a commonly utilized fuel gas in various industrial and everyday settings. Given its flammable, explosive, greenhouse nature, the real‐time monitoring of concentration air holds vital importance across practical applications. The tetrahedral structure methane molecules features high bond energies, posing significant challenge for chemical detection over metal oxide‐sensitive layers. In this research, multicomponent assembly method is used to synthesize ordered mesoporous tin oxide (SnO 2 with uniform large mesopores (≈ 10 nm) pore wall functionalized Pd x Pt nanoalloys 2.5 nm), due unusual C–H activation capabilities semiconducting properties SnO , obtained Pt@m‐SnO fabricate sensors which showcases wide applicability range detecting concentrations ranging from 50 20 000 ppm at 400 °C, it yields substantial CH response 9.19 (1000 ppm) an ultralow limit value 175.9 ppb. Furthermore, sensor successfully incorporated into portable device, evidencing capability accurate real‐world scenarios.

Language: Английский

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