Small, Год журнала: 2024, Номер 20(29)
Опубликована: Фев. 16, 2024
The modification of metal oxides with noble metals is one the most effective means improving gas-sensing performance chemiresistors, but it often accompanied by unintended side effects such as sensor resistance increases up to unmeasurable levels. Herein, a carbonization-oxidation method demonstrated using ultrasonic spray pyrolysis technique realize platinum (Pt) single atom (SA) substitutional doping into SnO
Язык: Английский
ACS Applied Materials & Interfaces, Год журнала: 2023, Номер 15(13), С. 16654 - 16663
Опубликована: Фев. 24, 2023
Triethylamine (TEA) is a flammable and highly toxic gas, the fast, accurate, sensitive detection of gas TEA remains greatly challenging. Herein, we report ZnO nanorod anchored with single-atom Pt catalyst (Pt1/ZnO) as sensor for detection. The shows high selectivity response to value 4170 at 200 °C, which 92 times higher than that pure ZnO. Moreover, Pt1/ZnO has very short recovery only 34 76 s, respectively, also ppb-level (100 ppb-21.6). gas-sensing enhancement mechanism was systematically investigated using band structure analysis, in situ diffuse reflectance infrared Fourier transformation spectroscopy, density functional theory calculations. results show oxygen vacancies on can effectively activate adsorbed oxygen. chemical bonds be formed between single atoms N achieve effective adsorption activation molecules, facilitating reaction Pt1/ZnO, thereby obtaining performance. This work highlights crucial role improving sensing performance detection, paving way developing more advanced sensors.
Язык: Английский
Процитировано
65
Journal of Energy Chemistry, Год журнала: 2023, Номер 85, С. 430 - 438
Опубликована: Июль 7, 2023
Язык: Английский
Процитировано
60
ACS Sensors, Год журнала: 2024, Номер 9(4), С. 1644 - 1655
Опубликована: Март 19, 2024
Chemiresistive gas sensors based on metal oxides have been widely applied in industrial monitoring, medical diagnosis, environmental pollutant detection, and food safety. To further enhance the sensing performance, researchers worked to modify structure function of material so that it can adapt different types conditions. Among numerous gas-sensitive materials, n-type TiO2 semiconductors are a focus attention for their high stability, excellent biosafety, controllable carrier concentration, low manufacturing cost. This Perspective first introduces mechanism nanostructures composite TiO2-based nanomaterials then analyzes relationship between properties composition, focusing also technical issues such as doping, heterojunctions, functional applications. The applications challenges nanostructured safety, other fields summarized detail. Finally, context practical application challenges, future development technologies new concepts explored, providing ideas directions multifunctional intelligent various fields.
Язык: Английский
Процитировано
56
Chemical Engineering Journal, Год журнала: 2023, Номер 473, С. 145481 - 145481
Опубликована: Авг. 15, 2023
Язык: Английский
Процитировано
55
Chinese Chemical Letters, Год журнала: 2023, Номер 35(1), С. 108286 - 108286
Опубликована: Март 4, 2023
Язык: Английский
Процитировано
54
ACS Sensors, Год журнала: 2024, Номер 9(4), С. 2101 - 2109
Опубликована: Апрель 4, 2024
Single-atom catalysts (SACs) hold great promise in highly sensitive and selective gas sensors due to their ultrahigh atomic efficiency excellent catalytic activity. However, the extremely high surface energy of SACs, it is still a huge challenge synthesize stable single-atom metal on materials. Here, we report an layer deposition (ALD) strategy for elaborate synthesis Pt oxygen vacancy-rich Fe2O3 nanosheets (Pt–Fe2O3–Vo), which displayed ultrafast detection H2, achieving stability single atoms. Gas-sensing investigation showed that Pt–Fe2O3–Vo materials enabled significantly enhanced response 26.5–50 ppm was 17-fold higher than pure Fe2O3, as well time (2 s), low limit (86 ppb), improved stability. The experimental density functional theory (DFT) studies revealed abundant vacancy sites contributed stabilizing atoms via electron transfer. In addition, stabilized also greatly promote transfer H2 molecules thereby sensing performance. This work provides potential development chemical sensors.
Язык: Английский
Процитировано
40
Materials Science and Engineering B, Год журнала: 2024, Номер 308, С. 117616 - 117616
Опубликована: Авг. 3, 2024
Язык: Английский
Процитировано
28
Langmuir, Год журнала: 2024, Номер 40(18), С. 9490 - 9500
Опубликована: Апрель 26, 2024
The highly sensitive gas sensors used to monitor the decomposition of toxic gases in dielectric materials electrical equipment are vital preventing safety problems arising from corrosion equipment. Recently, biphenylene (BPN) has been prepared through surface interpolymer hydrofluorination (HF zipper) reaction, whereas potential gas-sensitive devices based on BPN monolayer have lacked in-depth investigation. stable geometries, adsorption energies, interlayer distances, and charge transfers small molecules (H2S, SO2, SOF2, SO2F2) produced by SF6 chalcogenide adsorbed original systematically researched using nonequilibrium Green's function methods density functional theory. results indicated that all physisorbed, while type turned physisorption chemisorption when carried out with adsorbing a transition metal atom (TMA). In addition, characteristics current–voltage (I–V) curves H2S SO2 TMA–BPN revealed currents BPN-based displayed an obvious anisotropy, zigzag direction larger than armchair orientation regardless molecular cases. Moreover, difference for TMA-decorated changed more remarkably before after direction. This work offers insights into design monolayer.
Язык: Английский
Процитировано
23
Coordination Chemistry Reviews, Год журнала: 2025, Номер 531, С. 216493 - 216493
Опубликована: Фев. 8, 2025
Язык: Английский
Процитировано
7
ACS Sensors, Год журнала: 2025, Номер unknown
Опубликована: Янв. 2, 2025
In vivo electrochemical sensing of neurotransmitters, neuromodulators, and metabolites plays a critical role in real-time monitoring various physiological or psychological processes the central nervous system. Currently, advanced biosensors technologies have been emerging as prominent ways to meet surging requirements neurotransmitters neuromodulators ranging from single cells brain slices, even entire brain. This review introduces fundamental working principles summarizes achievements biosensing including voltammetry, amperometry, potentiometry, field-effect transistor (FET), organic (OECT). According elaborate feature technology, versatile strategies devoted solve issues associated with neurochemicals under an intricate environment. Voltammetry is universal technique investigate complex matrices which could realize miniaturization electrodes, while amperometry serves well-suited approach offering high temporal resolution favorable for fast oxidation–reduction kinetics neurochemicals. Potentiometry realizes quantitative analysis by recording potential difference reduced invasiveness compatibility. FET OECT serve amplification higher sensitivity than traditional technologies. Furthermore, we point out current shortcomings address challenges perspectives
Язык: Английский
Процитировано
3