Pt‐Pd Nanoalloys Functionalized Mesoporous SnO₂ Spheres: Tailored Synthesis, Sensing Mechanism, and Device Integration

Small, Journal Year: 2023, Volume and Issue: 19(39)

Published: June 1, 2023

Abstract Methane (CH 4 ), as the vital energy resource and industrial chemicals, is highly flammable explosive for concentrations above limit, triggering potential risks to personal production safety. Therefore, exploiting smart gas sensors real‐time monitoring of CH becomes extremely important. Herein, Pt‐Pd nanoalloy functionalized mesoporous SnO 2 microspheres (Pt‐Pd/SnO ) were synthesized, which show uniform diameter (≈500 nm), high surface area (40.9–56.5 m g −1 large mesopore size (8.8–15.8 nm). The dispersed nanoalloys are confined in mesopores , causing generation ofoxygen defects increasing carrier concentration sensitive materials. representative Pt 1 ‐Pd /SnO exhibits superior sensing performance with ultrahigh response ( R a /R = 21.33 3000 ppm), fast response/recovery speed (4/9 s), well outstanding stability. Spectroscopic analyses imply that such an excellent process involves conversion into formic acid CO intermediates, finally . Density functional theory (DFT) calculations reveal attractive covalent bonding interaction rapid electron transfer between support, dramatically promote orbital hybridization Pd sites adsorbed molecules, enhancing catalytic activation over layer.

Language: Английский

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Nanostructured metal oxide heterojunctions for chemiresistive gas sensors

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(44), P. 23742 - 23771

Published: Jan. 1, 2023

Metal oxides have been extensively used in environmental monitoring, breath analysis, and food quality assessment. This review summarizes the effects of nanoscale heterojunctions on enhancing gas-sensing performance metal oxide devices.

Language: Английский

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Recent Advances in Functionalization and Hybridization of Two‐Dimensional Transition Metal Dichalcogenide for Gas Sensor

Advanced Engineering Materials, Journal Year: 2023, Volume and Issue: 26(1)

Published: Nov. 3, 2023

Two‐dimensional (2D) transition metal dichalcogenides (TMDs) have garnered significant attention in gas‐sensing applications due to their sensitive response a wide range of gas molecules and ability operate at low temperatures, resulting low‐power consumption. However, there are several areas that require improvement, including insufficient sensitivity detection limits, limited selectivity, reliability, poor recovery. To address these issues enhance the performance sensors, researchers proposed functionalization hybridization 2D TMDs. This review paper focuses on elucidating synergistic effects TMDs with carbon‐related materials, metals, MOs, chalcogenides. The presents an in‐depth analysis mechanisms involved enhancing TMD sensors explores various synthesis methods for achieving hybridization. Furthermore, challenges currently faced field discussed offer insights into future prospects nanocomposite‐based sensors. By comprehensively addressing aspects, this research aims contribute advancement technology using nanocomposites.

Language: Английский

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UV-triggered carrier transport regulation of fibrous NiO/SnO2 heterostructures for triethylamine detection

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 476, P. 146687 - 146687

Published: Oct. 14, 2023

Language: Английский

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Metal Oxide Semiconductor Gas Sensors for Lung Cancer Diagnosis

Chemosensors, Journal Year: 2023, Volume and Issue: 11(4), P. 251 - 251

Published: April 17, 2023

Lung cancer is the most prevalent severe illness in both sexes and all ages leading cause of cancer-related deaths globally. Late-stage diagnosis primary its high mortality rate. Therefore, management lung needs early-stage screening. Breath analysis a non-invasive, low-cost, user-friendly approach to diagnosing cancer. Among various types breath sensors, MOS gas sensors are preferred due their responses, fast response times, robustness, lower price. This review focuses on critical role detecting VOCs patients’ exhaled breath. It introduces basic working mechanism gas-sensitive materials, summarizes some high-performance materials suitable for potential biomarkers provides performance enhancement strategies. The also briefly sensor array pattern recognition algorithm. Finally, we discuss challenges developing screening present prospect using e-nose large-scale early

Language: Английский

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Design of ultrahigh-response gas sensor based on Pd-WO3/WS2 ternary nanocomposites for ultrafast hydrogen detection

Sensors and Actuators B Chemical, Journal Year: 2023, Volume and Issue: 401, P. 134991 - 134991

Published: Nov. 20, 2023

Language: Английский

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Nitrogen‐Doped Indium Oxide Electrochemical Sensor for Stable and Selective NO₂ Detection

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(41)

Published: Aug. 19, 2024

Abstract Efficient gas sensors are critical for environmental monitoring and industrial safety. While metal oxide semiconductor (MOS) cost‐effective, they struggle with poor selectivity, high operating temperatures, limited stability. Electrochemical sensors, though selective energy‐efficient, face costs, stability issues due to precious catalysts like platinum on carbon (Pt/C). Herein, a novel, cost‐effective electrochemical sensor using nitrogen‐doped indium In 2 O 3− x N /3 V (0.01≤ ≤0.14), synthesized varying nitriding times is presented. The optimized 3 N‐40 min demonstrates remarkable response current of 771 nA 10 ppm nitrogen dioxide (NO ) at ambient temperature, outstanding long‐term (over 30 days) rapid response/recovery (5/16 s). Compared Pt/C it shows 84% 67% reductions in recovery times, respectively, maintains 98% performance after month, versus 68% Pt/C. This presents promising alternative sensing, eliminating the need catalysts.

Language: Английский

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Loose Ag-Doped LaFeO₃ Nanotubes-Based Gas Sensor for Excellent Acetic Acid Sensing

IEEE Sensors Journal, Journal Year: 2024, Volume and Issue: 24(5), P. 5821 - 5829

Published: Jan. 12, 2024

The efficient and reliable monitoring of acetic acid (CH3COOH) is significant to environmental protection human healthcare. LaFeO3 a potential sensing material for CH3COOH with its good sensitivity high plasticity. To further improve the properties meet requirements applications, we successfully utilized facile electrospinning technique fabricate series CH3COOH-sensitive Ag-doped (0–5 mol%) nanotubes. systematic characterization shows that appropriate content (4 Ag doping can effectively ameliorate morphology realize loose porous structures. Meanwhile, sensitization effect ameliorated significantly enhance gas-sensing vapor. optimal nanotubes-based gas sensor results in detection limit 0.5 ppm 3.6-fold enhancement response 100-ppm compared pure compact nanotubes at low operating temperature (150 °C). It also exhibits excellent selectivity long-term stability. Therefore, be regarded as promising practical applications. Finally, mechanism enhanced discussed.

Language: Английский

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Ultra-responsive and highly sensitive 1D ZnO nanotubes for detecting perilous low levels of NO₂ gas

Materials Advances, Journal Year: 2024, Volume and Issue: 5(7), P. 2826 - 2840

Published: Jan. 1, 2024

1D ZnO nanotubes were synthesized using a combination of chemical bath deposition (CBD) and thermal methods.

Language: Английский

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Engineering of Thickness Tunable 2D Graphdiyne Film to ZnO Nanowalls via Nanospace‐Confined Synthesis Promotes NO2 Gas Sensing Performance

Sensors and Actuators B Chemical, Journal Year: 2024, Volume and Issue: 410, P. 135729 - 135729

Published: March 30, 2024

Language: Английский

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