Sulfur Vacancy‐Induced Enhancement of Piezocatalytic H₂ Production in MoS₂

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

Опубликована: Фев. 3, 2025

Abstract This study explores the role of S vacancies in MoS 2 enhancing its piezocatalytic efficiency. Sulfur crystal lattice introduce localized changes electronic structure and charge distribution, improving material's piezoelectric response. Characterization catalysts involved techniques like field‐emission scanning electron microscopy (FESEM), X‐ray diffraction (XRD), transmission (TEM), photoelectron spectroscopy (XPS). Electrochemical measurements, including impedance (EIS) Mott–Schottky (M‐S) analysis, are performed to assess performance. The also employed density functional theory (DFT) calculations investigate hydrogen adsorption properties with vacancies. results demonstrated that S‐deficient significantly enhanced H evolution. production rates different vacancy concentrations measured under ultrasonic vibration. sample an optimal concentration (MS‐1) exhibited highest rate 1423.29 µmol g −1 h , compared 439.06 for pristine (MS‐0). improved performance is attributed increased polarization efficient separation facilitated by

Язык: Английский

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High-performance, breathable, and degradable fully cellulose-based sensor for multifunctional human activity monitoring

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 159564 - 159564

Опубликована: Янв. 1, 2025

Язык: Английский

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Comparison of Photocatalytic and Adsorption Properties of ZnS@ZnO, CdS@ZnO, and PbS@ZnO Nanocomposites to Select the Best Material for the Bifunctional Removal of Methylene Blue

ACS Omega, Год журнала: 2025, Номер 10(10), С. 9986 - 10003

Опубликована: Март 4, 2025

In this study, photocatalytic- and adsorption-based removal processes were conducted, which are frequently preferred in wastewater treatment due to their ease of control high efficiency. An innovative method aimed at was developed by combining the advantages these two distinct approaches within same material. The study synthesized ZnO, ZnS, CdS, PbS, composite structures (ZnS@ZnO, CdS@ZnO, PbS@ZnO) using a hydrothermal synthesis method. Characterization samples performed through field emission-scanning electron microscopy (FE-SEM), FE-SEM-energy dispersive X-ray (FE-SEM-EDX), diffraction (XRD), Raman spectroscopy, Fourier-transform infrared spectroscopy (FTIR) measurement. Additionally, optical properties all (absorption spectra band gap) investigated absorbance measurements obtained from ultraviolet (UV)-visible absorption spectroscopy. Although ZnO nanoparticles among materials with photocatalytic (exhibiting photodegradation efficiency 95.8% short duration 90 min), adsorption low. Therefore, aim enhancing both low values pure metal sulfides (ZnS, PbS), nanocomposites ZnS@ZnO, PbS@ZnO different morphologies synthesized, performances on methylene blue (MB) dye investigated. FE-SEM images indicated that ZnS exhibit spherical morphology, CdS have flower-like PbS display dendritic-like structure. results experimental studies demonstrated highest achieved ZnS@ZnO nanocomposite. degradation rates MB found be 95.3, 90.5, 89.4% for heterojunction composites PbS@ZnO, respectively, over time range 0-480 min. optimal amount photocatalyst could effectively degrade determined 100 mg, reusability revealed ability semiconductor decompose into simpler molecules limited after fourth cycle. 96.0, 30.5, 19.4% respectively. Finally, parameters influencing MB, such as pH, mass, contact time, examined, indicating capacity remained unchanged reaching value 40 mg·g-1.

Язык: Английский

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All-Fabric Triboelectric Nanogenerator (AF-TENG) Smart Face Mask: Remote Long-Rate Breathing Monitoring and Apnea Alarm

ACS Sensors, Год журнала: 2023, Номер 8(4), С. 1684 - 1692

Опубликована: Март 28, 2023

Since the beginning of COVID-19 pandemic, use face masks has become not only mandatory in several countries but also an acceptable approach for combating pandemic. In quest designing effective and useful mask, triboelectric nanogenerators (TENGs) have been recently proposed. Novel functionalities are provided with TENGs due to induced triboelectrification generated by exhaled inhaled breath, allowing their as energy sensor. Nonetheless, within presence nontextile plastics or other common (TE) materials can be undesired. Herein, we propose all-fabric TENG (AF-TENG) high molecular weight polyethylene (UHMWPE) cotton fabric negative positive layers, respectively. With these materials, it is possible detect breathing patient, which case detecting a signal over few minutes trigger alarm locally, providing valuable time. Also, this article, sent signals locally remotely distances up 20 km via Wi-Fi LoRa, same warning anomalies. This work reveals smart important tool used difficult epidemiological periods general public, bringing much more comfort relaxation patients elderly today's society, based on pristine eco-friendly materials.

Язык: Английский

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Triboelectric nanogenerator (TENG) enhanced air filtering and face masks: Recent advances

Nano Energy, Год журнала: 2023, Номер 114, С. 108635 - 108635

Опубликована: Июнь 25, 2023

Язык: Английский

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Triboelectric Nanogenerator for Self‐Powered Gas Sensing

Small, Год журнала: 2024, Номер unknown

Опубликована: Окт. 8, 2024

Abstract With the continuous acceleration of industrialization, gas sensors are evolving to become portable, wearable and environmentally friendly. However, traditional rely on external power supply, which severely limits their applications in various industries. As an innovative adaptable generation technology, triboelectric nanogenerators (TENGs) can be integrated with leverage benefits both technologies for efficient friendly self‐powered sensing. This paper delves into basic principles current research frontiers TENG‐based sensor, focusing particularly environmental safety monitoring, healthcare, as well emerging fields such food assurance smart agriculture. It emphasizes significant advantages sensor systems promoting sustainability, achieving sensing at room temperature, driving technological innovations devices. also objectively analyzes technical challenges, including issues related performance enhancement, theoretical refinement, application expansion, provides targeted strategies future directions aimed paving way progress widespread field sensors.

Язык: Английский

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Nanodiamond/Ti3C2 MXene-coated quartz crystal microbalance humidity sensor with high sensitivity and high quality factor

Rare Metals, Год журнала: 2024, Номер 43(6), С. 2719 - 2729

Опубликована: Март 22, 2024

Язык: Английский

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Fabrication of bare and cobalt-doped ZnFe2O4 thin film as NH3 gas sensor with enhanced response through UV-light illumination

Materials Today Chemistry, Год журнала: 2024, Номер 38, С. 102049 - 102049

Опубликована: Апрель 13, 2024

Язык: Английский

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Novel metal oxides partially derived perovskite-structured hydroxides for room temperature trace NO2 gas sensors under UV irradiation

Talanta, Год журнала: 2024, Номер 286, С. 127449 - 127449

Опубликована: Дек. 20, 2024

Язык: Английский

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Polystyrene Waste-ZnO nanocomposite film for energy harvesting via hydrophobic triboelectric nanogenerator: Transforming waste into energy

Materials Today Sustainability, Год журнала: 2024, Номер 26, С. 100726 - 100726

Опубликована: Март 14, 2024

Язык: Английский

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