Review and Perspective: Gas Separation and Discrimination Technologies for Current Gas Sensors in Environmental Applications

ACS Sensors, Год журнала: 2023, Номер 8(4), С. 1373 - 1390

Опубликована: Апрель 19, 2023

Presently, numerous state-of-the-art approaches are being adapted for gas sensing and monitoring. These include hazardous leak detection as well ambient air Photoionization detectors, electrochemical sensors, optical infrared sensors a few of the commonly widely used technologies. Extensive reviews on current state have been summarized. which either nonselective or semiselective, affected by unwanted analytes. On other hand, volatile organic compounds (VOCs) can be heavily mixed in many vapor intrusion situations. To determine individual VOCs highly sample using semiselective separation discrimination technologies warranted. permeable membranes, metal-organic frameworks, microfluidics IR bandpass filters different respectively. The majority these currently developed evaluated laboratory-controlled environments not yet extensively utilized field show promise continued development application more complex mixtures. Hence, present review focuses perspectives summary existing popular reported environmental applications.

Язык: Английский

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

Coordination Chemistry Reviews, Год журнала: 2024, Номер 505, С. 215691 - 215691

Опубликована: Янв. 31, 2024

Язык: Английский

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Influence of Al cations insertion on the structural, morphological, optical properties, and methyl orange photocatalytic remotion of Pr-doped ZnO system

Materials Chemistry and Physics, Год журнала: 2024, Номер 318, С. 129300 - 129300

Опубликована: Апрель 4, 2024

Язык: Английский

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Wireless Gas Sensor Based on the Mesoporous ZnO–SnO₂ Heterostructure Enables Ultrasensitive and Rapid Detection of 3-Methylbutyraldehyde

ACS Sensors, Год журнала: 2024, Номер 9(5), С. 2585 - 2595

Опубликована: Апрель 20, 2024

Achieving ultrasensitive and rapid detection of 3-methylbutyraldehyde is crucial for monitoring chemical intermediate leakage in pharmaceutical industries as well diagnosing ventilator-associated pneumonia by exhaled gas. However, developing a sensitive method detecting poses challenges. Herein, wireless chemiresistive gas sensor based on mesoporous ZnO–SnO2 heterostructure fabricated to enable the first time. The exhibits uniform spherical shape (∼79 nm diameter), high specific surface area (54.8 m2 g–1), small crystal size (∼4 nm), large pore (6.7 nm). demonstrates response (18.98@20 ppm), short response/recovery times (13/13 s), low limit (0.48 ppm) toward 3-methylbutyraldehyde. Furthermore, real-time system developed utilizing microelectromechanical systems sensors. modification amorphous ZnO SnO2 wall can effectively increase chemisorbed oxygen content thickness electron depletion layer at gas–solid interface, which facilitates interface redox reaction enhances sensing performance. This work presents an initial example semiconductor metal oxide sensors efficient that holds great potential ensuring safety during production disease diagnosis.

Язык: Английский

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Bimetallic MOF-Based Sensor for Highly Sensitive Detection of Ammonia Gases

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(10), С. 13191 - 13201

Опубликована: Фев. 28, 2024

The demand for the detection of ultralow concentrations ammonia gas is growing. A bimetallic metal–organic framework (MOF) comprising Prussian blue analogs (PBAs) was used to achieve highly sensitive and stable at room temperature in this study. First, PB enriched by using improved sensing properties. Second, a membrane with more vacancies formed partially replacing Fe3+ Cu2+ through cation-exchange strategy. Finally, capacitive sensor developed ultralow-concentration Cu–Fe PBA interdigitated electrodes (IDEs). To investigate adsorption efficiency designed composite film ammonia, PBAs nanoparticles were deposited on quartz microcrystal balance (QCM) via cyclic voltammetry hydrothermal method. Approximately 10 ppm adsorbed under 1 atm prepared reaction time 36 h, measured be 2.2 mmol g–1 QCM frequency response. also tested scanning electron microscopy, transmission X-ray diffraction, Brunauer–Emmett–Teller theory. introduction ions significantly increased specific surface area MOF, number sites increased; however, its skeleton structure remained similar that PB. Then, based IDE fabricated device established detection. Overall, exhibits linear response 75–1000 ppb limit 3.8 concentrations, which makes it superior traditional methods thus allows excellent application prospects.

Язык: Английский

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Synthesis of Mesoporous Lanthanum-Doped SnO₂ Spheres for Sensitive and Selective Detection of the Glutaraldehyde Disinfectant

ACS Sensors, Год журнала: 2023, Номер 8(10), С. 3723 - 3732

Опубликована: Авг. 23, 2023

Glutaraldehyde disinfectant has been widely applied in aquaculture, farming, and medical treatment. Excessive concentrations of glutaraldehyde the environment can lead to serious health hazards. Therefore, it is extremely important develop high-performance sensors with low cost, high sensitivity, rapid response, fabulous selectivity, limit detection. Herein, mesoporous lanthanum (La) doped SnO2 spheres specific surface area (52-59 m2 g-1), uniform mesopores (with a pore size concentrated at 5.7 nm), highly crystalline frameworks are designed fabricate sensitive gas toward gaseous glutaraldehyde. The lanthanum-doped exhibit excellent glutaraldehyde-sensing performance, including response (13.5@10 ppm), time (28 s), detection 0.16 ppm. sensing performance ascribed area, contents chemisorbed oxygen species, doping. DFT calculations suggest that doping lattice effectively improve adsorption energy compared pure materials. Moreover, fabricated detect commercial disinfectants, indicating potential application

Язык: Английский

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CuO/TiO2 heterostructure-based sensors for conductometric NO2 and N2O gas detection at room temperature

Sensors and Actuators B Chemical, Год журнала: 2023, Номер 397, С. 134635 - 134635

Опубликована: Сен. 19, 2023

Nitrous oxide (N2O) is hazardous gas extensively used in surgeries as an anesthetic and released into the atmosphere without any treatment. Despite low concentrations atmosphere, it has for 300 times larger warming coefficient to greenhouse effect than CO2. There are only a few studies dedicated development of N2O sensors, but not room temperature (RT) ultra-low concentrations. In this study, we developed ultrasensitive gas-sensing device operating at RT based on CuO/TiO2 heterojunctioned nanointerfaces prepared by scalable reactive magnetron sputtering technique with glancing angle deposition. The demonstrated sensitivity ~2 higher TiO2 mono-layer, exhibits outstanding detection limit 50 ppb RT, quick response recovery (~36 s ~50 s). ultrasensitivity sensor achieved providing control over nanoarchitecture comparable size nanorods-like structure doubled Debye lengths (~70-80 nm). applied design opens flexible platform different sensing devices where array p-n heterojunction nanorods was utilized efficiently technological simplicity. statistical analysis variances shows that obtained data more confident reproducible.

Язык: Английский

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W-CeO2 nanospheres gas sensor array for accurate and selective H2S detection in exhaled breath

Chemical Engineering Journal, Год журнала: 2023, Номер 479, С. 147748 - 147748

Опубликована: Ноя. 29, 2023

Язык: Английский

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Application of Semiconductor Metal Oxide in Chemiresistive Methane Gas Sensor: Recent Developments and Future Perspectives

Molecules, Год журнала: 2023, Номер 28(18), С. 6710 - 6710

Опубликована: Сен. 20, 2023

The application of semiconductor metal oxides in chemiresistive methane gas sensors has seen significant progress recent years, driven by their promising sensitivity, miniaturization potential, and cost-effectiveness. This paper presents a comprehensive review developments future perspectives this field. main findings highlight the advancements material science, sensor fabrication techniques, integration methods that have led to enhanced methane-sensing capabilities. Notably, incorporation noble dopants, nanostructuring, hybrid materials significantly improved sensitivity selectivity. Furthermore, innovative such as thin-film deposition screen printing, enabled cost-effective scalable production. challenges limitations facing oxide-based were identified, including issues with selectivity, operating temperature, long-term stability, response times. To address these challenges, advanced science techniques explored, leading novel oxide unique properties. Design improvements, integrated heating elements for precise temperature control, investigated enhance stability. Additionally, data processing algorithms machine learning employed improve selectivity mitigate baseline drift. show potential practical applications. improvements stability achieved through innovations design modifications pave way real-world deployment. further enhances reliability accuracy detection. However, remain, research should focus on overcoming fully unlock capabilities sensors. Green manufacturing practices also be explored align increasing environmental consciousness. Overall, advances field open up new opportunities efficient monitoring, leak prevention, protection.

Язык: Английский

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Live-tracking of beef freshness by sub-ppb level ammonia detection using WS₂/rGO nanoflakes incorporating edge site-enriched acidic sulfur

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(18), С. 11004 - 11019

Опубликована: Янв. 1, 2024

Highly accurate, easily accessible room temperature wireless gas-sensing technology can be utilized to monitor food freshness in real time prevent fraud and spoiled consumption, thus safeguarding humans from diseases.

Язык: Английский

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