Novel BiOBr/Bi2S3 high-low junction prepared by molten salt method for boosting photocatalytic degradation and H2O2 production

Journal of Material Science and Technology, Год журнала: 2023, Номер 155, С. 148 - 159

Опубликована: Март 17, 2023

Язык: Английский

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Bifunctional hierarchical NiCoP@FeNi LDH nanosheet array electrocatalyst for industrial-scale high-current-density water splitting

Journal of Material Science and Technology, Год журнала: 2023, Номер 159, С. 33 - 40

Опубликована: Апрель 12, 2023

Язык: Английский

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Honeycomb-like MXene/NiFeP _x –NC with "continuous" single-crystal enabling high activity and robust durability in electrocatalytic oxygen evolution reactions

Journal of Advanced Ceramics, Год журнала: 2023, Номер 12(3), С. 553 - 564

Опубликована: Фев. 17, 2023

The development of low-cost, stable, and robust non-noble metal catalysts for water oxidation is a pivotal challenge sustainable hydrogen production through electrocatalytic splitting. Currently, such suffer from high overpotential sluggish kinetics in oxygen evolution reactions (OERs). Herein, we report "continuous" single-crystal honeycomb-like MXene/NiFeP_x–N-doped carbon (NC) heterostructure, which ultrasmall NiFeP_x nanoparticles (NPs) encapsulated the NC are tightly anchored on layered MXene. Interestingly, this MXene/NiFeP_x–NC delivers outstanding OER catalytic performance, stems characteristics, abundant active sites derived NPs, stable heterostructure with an open structure. experimental results rationalized theoretically (by density functional theory (DFT) calculations), suggests that it unique promotes OER, thereby enabling superior durability excellent activity ultralow 240 mV at current 10 mA·cm⁻².

Язык: Английский

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Hierarchically stabilized Pt single-atom catalysts induced by an atomic substitution strategy for an efficient hydrogen evolution reaction

Energy & Environmental Science, Год журнала: 2024, Номер 17(14), С. 5227 - 5240

Опубликована: Янв. 1, 2024

Tuning and stabilizing the chemical microenvironment of Pt-based single-atom catalysts is a major challenge in promoting an electrocatalytic hydrogen evolution reaction (HER).

Язык: Английский

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Density Functional Theory Investigation of Pristine and Ni-Doped CeO₂ (110) for C₂H₄ Detection Based on Optimized Work Functions

ACS Applied Nano Materials, Год журнала: 2024, Номер 7(4), С. 4239 - 4251

Опубликована: Фев. 5, 2024

With the rapid development of global industrialization, industrial production leads to emission large quantities toxic gases and long-term exposure these air poses a serious threat human health ecological environment. Therefore, online monitoring is worthy task. In this work, structures pristine cerium oxide (CeO2) nickel-doped (Ni-CeO2) surfaces are established based on first-principles, 12 adsorption NH3, CH4, SO2, H2S, CO, C2H4 gas molecules CeO2 Ni-CeO2 constructed by geometrical optimization. We investigate performance gas-sensing mechanism each system from various aspects, such as energy, band gap, electron density, density states, frontier molecular orbital theory, conductivity, sensitivity, recovery time, work function. The results showed that significantly improved properties (−1.784 eV), H2S (−1.036 SO2 (−1.731 NH3 (−1.045 eV). Ni-CeO2/C2H4 exhibits high response (116.414), function (4.45 fast (74.24 s) well strong resistivity changes. Hence, theoretical simulation experiments in paper provide guidance for highly sensitive, type sensor detection harmful atmosphere.

Язык: Английский

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Synergistic flower-like N-doped Co/Mo2C catalyst for hydrogen evolution reaction in universal pH and high-performance alkaline water-splitting

Materials Today Chemistry, Год журнала: 2025, Номер 43, С. 102476 - 102476

Опубликована: Янв. 1, 2025

Язык: Английский

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Performance of graphene Oxide/SiO2 Nanocomposite-based: Antibacterial Activity, dye and heavy metal removal

Arabian Journal of Chemistry, Год журнала: 2022, Номер 16(2), С. 104450 - 104450

Опубликована: Ноя. 25, 2022

Nanocomposite materials have been successfully applied to remediation of organic and inorganic contaminants from polluted water. The present study investigates the synthesis, characterizations, adsorptive performances graphene oxide/SiO2 nanocomposite-based adsorbent. Graphene was used for adsorption methylene blue (MB) Cr (VI) ion wastewater. Furthermore, antibacterial activity performance synthesized nanocomposite studied. consideration has performed by various parameters in our laboratory. X-ray crystallography (XRD), Scanning electron microscope (SEM), Energy Dispersive Analysis (EDX) and, thermal gravimetric analysis (TGA) methods were characterization, morphological structure, crystallinity, stability oxide/SiO2. Maximum capacities oxide/SiO2-based adsorbent had evaluated Langmuir isotherm model MB as 555.50 181.81 mg/g, respectively. Generally, experiments revealed that all adsorbents found order > (VI). against gram-positive gram-negative bacteria showed proved composite a remarkable ability kill bacteria.

Язык: Английский

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A facile strategy for large-scale production of 2D nanosheets exfoliated by three-roll milling

Journal of Advanced Ceramics, Год журнала: 2023, Номер 13(1), С. 11 - 18

Опубликована: Ноя. 27, 2023

Two-dimensional (2D) nanomaterials, such as graphene, MoS₂, and MAX, have attracted increasing research attention in recent years due to their unique structural performance advantages. However, complex production processes equipment requirements are significant issues affecting widespread use. Here, by using an exfoliation strategy three-roll milling, we present a simple, cost-effective, extensible method produce multilayer BN, Ti₃AlC₂ nanosheets. The roller phenolic resin created three kinds of forces on the layered 2D materials, shear forces, compressive adhesive which exfoliated materials from edges surfaces into Subsequently, were ultrasonically washed with alcohol, treated ultrasonic vibration centrifuged obtain nanomaterials. easy operation high yield attractive for based construction high-performance nanosheet-based devices at low cost. Herein, obtained graphene MoS₂ nanosheets used anode material sodium/potassium-ion batteries, respectively, test electrochemical properties. Better performances compared primary bulk materials.

Язык: Английский

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Behavior of Ultra-High-Performance Concrete with Hybrid Synthetic Fiber Waste Exposed to Elevated Temperatures

Buildings, Год журнала: 2023, Номер 13(1), С. 129 - 129

Опубликована: Янв. 4, 2023

The reinforcement of ultra-high-performance concrete (UHPC) with fibers was investigated in this study. Concrete is the most widely used manmade construction material, and UHPC has remarkable mechanical properties. properties can be modified by a variety curing procedures amount cement used. This study aimed to examine impact fiber reinforcement, temperature, exposure time on UHPC. Initially, temperature for changed from 300 °C 500 set 1 2 h. Various combinations ultrasonic pulse, thermal conductivity, compressive strength, flexural splitting, modulus elasticity, drop hammer (impact resistance, energy, ductility index) were after 91 days steam curing. For curing, kept at 90 three days. characteristics primary focus research. test results showed that accelerated regime achieved maximum strength 102.6 MPa specimens without 124.7 fibers, which represents 22% increase strength. When compared all qualities improved, especially when subjected high temperatures. incorporation hybrid synthetic waste key aspect developing new ultra-high-strength features.

Язык: Английский

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First-principles calculations to investigate structural, electronic, elastic and optical properties of radium based cubic fluoro-perovskite materials

Heliyon, Год журнала: 2023, Номер 9(2), С. e13687 - e13687

Опубликована: Фев. 1, 2023

Perovskite materials play a vital role in the field of material science via experimental as well theoretical calculations. Radium semiconductor are considered backbone medical fields. These high technological fields to be used controlling decay ability. In this study, radium-based cubic fluoro-perovskite XRaF3 (where X = Rb and Na) calculated using DFT (density functional theory). compounds nature with 221 space groups that construct on CASTEP (Cambridge-serial-total-energy-package) software ultra-soft PPPW (pseudo-potential plane-wave) GGA (Generalized-Gradient-approximation)-PBE (Perdew-Burke-Ernzerhof) exchange-correlation functional. The structural, optical, electronic, mechanical properties calculated. According structural properties, NaRaF3 RbRaF3 have direct bandgap 3.10eV 4.187eV RbRaF3, respectively. Total density states (DOS) partial (PDOS) provide confirmation degree electrons localized distinct bands. is semiconductors insulator, according electronic results. imaginary element dispersion dielectric function reveals its wide variety energy transparency. both compounds, optical transitions examined by fitting damping ratio for notional scaling appropriate peaks. absorption conductivity compound better than which make it suitable solar cell applications increasing efficiency work function. We observed mechanically stable structure. criteria stability also met estimated elastic potential application medical.The band gap, necessary conditions applications. Here, literature was reviewed check computational translational insight into relationships between novel compounds.

Язык: Английский

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