RGO@In2O3 based flexible gas sensor: Efficient monitoring of trace NO2 gas at room temperature

Sensors and Actuators B Chemical, Год журнала: 2025, Номер unknown, С. 137359 - 137359

Опубликована: Янв. 1, 2025

Язык: Английский

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Sandwich‐Structured ZnO/MXene Heterojunction for Sensitive and Stable Room‐Temperature Ammonia Sensing

Small, Год журнала: 2025, Номер 21(11)

Опубликована: Фев. 16, 2025

Abstract 2D metal carbides/nitrides (MXenes) have attracted considerable interest in NH 3 sensing due to their high electrical conductivity and abundant terminal groups. However, the strong interlayer interactions between MXene nanosheets result challenges related recovery rapid response decay MXene‐based sensors. Here, a one‐step hydrothermal strategy is developed that anchors Zn atoms grows ZnO polycrystals on Ti vacancies of C 2 T x layers, forming sandwich‐structured ZnO/Ti heterojunction. At room temperature, sensitivity remarkable 45‐fold higher than , with low detection limit 138 ppb time 39 s. Furthermore, heterojunction exhibits exceptional long‐term stability, maintaining consistent over 21 days. The results confirm situ intercalation effectively solves problem substrates by completely exfoliating nanosheets. Meanwhile, room‐temperature performance speed enhanced electron conduction. This straightforward effective route for exfoliation layers promises expanded use material heterojunctions applications.

Язык: Английский

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Highly sensitive formaldehyde gas sensor based on Au nanoparticle functionalized 1D LaFeO3 nanofibers

Microchemical Journal, Год журнала: 2025, Номер unknown, С. 113140 - 113140

Опубликована: Фев. 1, 2025

Язык: Английский

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Fast and Portable Single-Sensor Electronic Nose for Accurate Quality Assessment of Extra Virgin Olive Oil Using a Temperature-Modulated Generic Gas Sensor

Опубликована: Янв. 1, 2025

Preserving the quality of extra virgin olive oil (EVOO) is mainly impeded by blending it with inferior or alternative edible oils. A portable, accurate, and rapid electronic nose was developed to assess purity blended (VOO), ranging in five different relative proportions. thermal shock-induced (TSI) SnO2 gas sensor employed, obviating necessity for a array mitigating multi-dimensional drift. The discriminative response time optimized 3.2 s, consistent repeatability over three-month experiments. After preprocessing, feature selection performed, followed combination principal component analysis (PCA) linear discriminant (LDA), which effectively segregated complex odor clusters 3-D space. k-NN classifier utilizing Euclidean distance attained an exceptional 96% accuracy k = 5 identifying binary proportions EVOO VOO. This innovative technique shows great promise industrial applications recognition.

Язык: Английский

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Study on unusual response behavior of NO2 sensor based on UV enhanced Pd-functionalized Ga2O3 microrods

Sensors and Actuators B Chemical, Год журнала: 2025, Номер unknown, С. 137266 - 137266

Опубликована: Янв. 1, 2025

Язык: Английский

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High-Sensitivity Room-Temperature Detection of H₂S Using ZnO/Ti₃C₂T_X Nanocomposite: Potential Applications in Exhaled Gas Monitoring

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Апрель 13, 2025

The detection of hydrogen sulfide (H2S) in exhaled breath at room temperature is essential for health monitoring and disease diagnosis. This study investigates a ZnO/Ti3C2TX nanocomposite synthesized by combining ZnO nanoparticles, prepared hydrothermal method, with Ti3C2TX MXene. Experimental results demonstrate that the sensors exhibit excellent H2S performance high sensitivity, rapid response time, robust recovery capability. Specifically, ZnO/Ti3C2TX-1.0 wt % sensor shows 85.116 5 ppm H2S, which 14-fold 35-fold greater than pure MXene, respectively. exhibits (50 s) time (115 100 ppb H2S. Additionally, it exceptional sensitivity to low concentrations, limit as 1 ppb. Based on sensing performance, oral gas demonstrates effectively differentiates levels healthy patient samples. These findings highlight potential temperature, offering new insights developing ultrasensitive biogas sensors.

Язык: Английский

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The Sensing Selectivity of Gas Sensors Based on Different Sn-Doped Indium Oxide Films

Chemosensors, Год журнала: 2025, Номер 13(5), С. 169 - 169

Опубликована: Май 5, 2025

The gas-sensitive performance and selectivity of gas sensors via different Sn-doped indium oxide (In2O3) films have been investigated. response characteristics were significantly enhanced to methanol (CH4O), ethanol (C2H6O), acetone (C3H6O) with the increase in Sn content, while time recovery became shorter. sensor exhibited strongest ethanol, followed by then all ratios In2O3 (90%, 85%, 80%) SnO2 (10%, 15%, 20%). mechanism doping on sensing was calculated using density functional theory (DFT) method, which perfectly explained experimental results. demonstrated high towards even presence interfering gases. In addition, showed effective detection target 10 ppb good repeatability. This work systematically analyzed priority In2O3-based sensors, providing a new path for multi-interference complex environments.

Язык: Английский

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Oxygen Defect Engineering Optimization for Improving the Performance of a Fusiform Hematite (α-Fe2O3) Ethanol Sensor

Ceramics International, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 1, 2024

Язык: Английский

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