Tài liệu miễn phí Hoá học
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Steady state calculations of the PWR MOX/UO2 core with the monte carlo code MCNP6
This paper presents the steady-state analysis results of the OECD/NEA and U.S. NRC PWR MOX/UO2 (MOX: Mixed Oxide) Core Transient Benchmark with the modern MCNP6 Monte Carlo code based on the ENDF/B-VII.1 evaluated nuclear data library.
4/5/2023 1:08:02 AM +00:00
Dependence of hydrothermal time on structural characteristics and photocatalytic properties of SnO2 nanoparticles
In this work, SnO2 nanoparticles were prepared by hydrothermal method using SnCl4.5H2O and NaOH at 180 °C for different hydrothermal times. The effect of hydrothermal time on the crystal structure, morphology, chemical bonding, and photocatalytic properties of SnO2 nanoparticles was studied. Structural and morphological characteristics of SnO2 nanoparticles were investigated by X-ray diffraction and electron scanning microscopy analyses.
4/5/2023 1:07:53 AM +00:00
Facile hydrothermal method for fabrication of seedless ZnO nanorod/go composite on PCB
The hydrothermal growing conditions such as temperature and time were investigated by Xray diffractometry (XRD), Raman scattering, as well as Scanning Electron Microscopy (SEM). It is shown that the as-prepared ZnO nanorod was grown well-vertically on the substrate. Furthermore, we investigated the photocatalytic activity of synthesized samples, which showed the enhanced photodegradation ability in the composite sample.
4/5/2023 1:07:45 AM +00:00
Photoluminescent properties of red emitting AlPO4:Cr3+ phosphor for plant growth leds
In this study, red-emitting AlPO4:Cr3+ phosphors have been successfully synthesized by a facile sol-gel method. The Tanabe–Sugano diagram demonstrates that the surrounding sites of Cr3+ ions have a high crystal field with Dq/B=2.47.
4/5/2023 1:07:37 AM +00:00
Electrochromic properties of PANI/TiO2 nanocomposite films prepared by electropolymerization
The PANI/nc-TiO2 heterojunctions were formed in the composite films due to the insertion of PANI in nano-porous TiO2 particles. PANI/ITO films exhibited a reversible electrochromic display (ECD) performance when cycled in 0.1M LiClO4 + propylene carbonate
4/5/2023 1:07:30 AM +00:00
Synthesis and waterproofness improvement of K3AlF6:Mn4+ phosphor for warm white light emitting diodes
In this study, we synthesized K3AlF6:Mn4+ phosphor by co-precipitation method and investigated its crystal structure and photoluminescence properties . By surface modification of K3AlF6:Mn4+ using K3AlF6, the moisture resistance performance of the phosphor can be significantly improved.
4/5/2023 1:07:23 AM +00:00
Influences of ZnO nanorod arrays on photocatalytic activity of n-ZnO nanorods/p-Si heterostructure
The n-ZnO nanorods/p-Si heterostructures show good photocatalytic ability at high baking temperature. The concentration of Rhodamine B can be decreased up to 97% after 150 min treated by the n-ZnO nanorods/p-Si heterostructures grown at 80 oC. This result indicates that the n-ZnO nanorods/p-Si heterostructures are capable of being used in the decomposition of organic compounds.
4/5/2023 1:07:02 AM +00:00
Highly selective separation of CO2 and H2 by MIL-88A metal organic framework
The adsorption capacity of CO2 and H2 in the absence and presence of water medium in MIL-88A was analyzed. We found that the magnitude of the CO2 capacity was many times higher than that of the H2 capacity, which led to rather high CO2/H2 selectivity.
4/5/2023 1:06:52 AM +00:00
Excess conductivity analyses in Bi-Pb-Sr-Ca-Cu-O systems sintered at different temperatures
This paper studies the effects of the sintering temperature on crystal structure, critical temperature (Tc) and excess conductivity of Bi-Pb-Sr-Ca-Cu-O (BPSCCO) system. Bulk BPSCCO samples were fabricated by the solid-state reaction method. Four different temperatures of 835 °C, 840 °C, 845 °C, and 850 °C were applied to sinter four different samples.
4/5/2023 1:06:34 AM +00:00
Exafs debye-waller factors of B2-feal alloys
This work develops the anharmonic correlated Debye model to study the temperaturedependent extended X-ray absorption fine structure (EXAFS) Debye-Waller factors (DWFs) of B2- FeAl alloys. We derived the analytical expressions of the EXAFS DWF and Debye frequency as functions of temperature.
4/5/2023 1:06:25 AM +00:00
Synthesis and characterization of silver nanoparticles for antibacterial application against bacillus subtilis and pseudomonas aeruginosa
In this study, the stable silver nanoparticles (AgNPs) were synthesized by reducing silver nitrate (AgNO3) using trisodium citrate (TSC). The product was characterized by Ultraviolet-Visible spectroscopy, Fourier-transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) and X-ray diffraction analysis (XRD).
4/5/2023 1:05:54 AM +00:00
Fermions, gauge bosons and higgs masses in the 3-3-1-1 model with charged lepton
In this paper, a new version of 3-3-1-1 model was proposed to solve the Landau pole problem of the previous versions. The masses of fermions where the masses of active neutrinos are generated through the seesaw mechanism, are calculated in detail. All the Higgs bosons and gauge bosons as well as their masses are identified and calculated.
4/5/2023 1:04:26 AM +00:00
Synthesis of Zno nanoparticles nanofibers and their luminescence via electrospinning
This article reports on the synthesis procedure of ZnO nanoparticles/nanofibers structure by electrospinning method using Zinc acetate and polyvinylpyrrolidone (PVP) surfactant as reagents and evaluates their luminescent properties. The microstructure of ZnO nanoparticles/nanofibers was observed by FE-SEM.
4/5/2023 1:04:17 AM +00:00
Combining the mie-lennard-jones and the morse potentials in studying the elastic deformation of interstitial alloy AGC with FCC structure under pressure
In this study, the mean nearest neighbor distance between two atoms, the Helmholtz free energy and characteristic quantities for elastic deformation such as elastic moduli E, G, K and elastic constants C11, C12, C44 for binary interstitial alloys with FCC structure under pressure are derived with the statistical moment method.
4/5/2023 1:04:08 AM +00:00
The impact of IL28B gene polymorphisms on drug responses
In particular, the IL28B gene polymorphisms have been studied and shown to have impacts on drug responses in the treatment of many diseases, such as chronic hepatitis C, chronic hepatitis B, and myeloproliferative neoplasms.
4/5/2023 1:00:19 AM +00:00
Low power multilevel resistive switching in titanium oxide-based RRAM devices by interface engineering
The thermodynamics involving the dielectric constant and Gibb's free energy of oxide formation at the Al/TiOx and TiOx/TiOy interfaces play a pivotal role in the associated switching mechanism. The spatial variability of the operating voltage across these devices is found to be as low as 8%. These findings pave the way for low power, low cost, and high density data storage applications.
4/5/2023 12:59:59 AM +00:00
The atomic and electronic structure of Hf0.5Zr0.5O2 and Hf0.5Zr0.5O2:La films
The bombardment with argon ions of the studied films leads to oxygen vacancy generation in the near-surface layer. The oxygen vacancy concentrations in the bombarded films were evaluated from the comparison of experimental valence band photoelectron spectra with the theoretical ones calculated using the density functional theory.
4/5/2023 12:59:52 AM +00:00
Enhanced magnetocaloric performance in nanocrystalline/amorphous Gd3Ni/Gd65Ni35 composite microwires
A novel class of nanocrystalline/amorphous Gd3Ni/Gd65Ni35 composite microwires were created directly from melt-extraction through controlled solidification. X-ray diffraction (XRD), transmission electron microscopy (TEM), and selected area electron diffraction (SAED) confirmed the formation of a biphase nanocrystalline/amorphous structure in these wires.
4/5/2023 12:59:42 AM +00:00
Wool-coiled bimetallic oxysulfide MoSrOS catalyst synthesis for catalytic reduction of toxic organic pollutants and heavy metal ions
The results showed that 100 mL (20 ppm) of 4-NP was completely reduced into 4-aminophenol (4-AP) in 20 min. Moreover, 100 mL (20 ppm) of MB, 100 mL (50 ppm) of RhB, 100 mL (50 ppm) of MO and 100 mL (50 ppm) of Cr(VI) were completely reduced within 6, 20, 40, and 30 min, respectively, by MoSrOS-2 bimetal oxysulfide catalyst.
4/5/2023 12:59:26 AM +00:00
A hierarchical porous aerogel nanocomposite of graphene/NiCo2S4 as an active electrode material for supercapacitors
A three-dimensional reduced graphene oxide/nickel-cobalt sulfide (RGO/NiCo2S4) aerogel was fabricated by an efficient and facile one-step hydrothermal approach. The NiCo2S4 needle-like structure consisted of many small nanoparticles well attached to the surface of the RGO sheet. The prepared aerogel had high porosity and conductivity.
4/5/2023 12:59:15 AM +00:00
Constructing g-C3N4/SnO2 S-scheme heterojunctions for efficient photocatalytic NO removal and low NO2 generation
This study also shows that the g-C3N4/SnO2 heterojunction is a stable catalyst system and superoxide radicals play a crucial role in the photocatalytic NO removal. Since the preparation of the g-C3N4/SnO2 heterojunction reported in this work is straightforward, it can potentially enable the preparation of highly robust visible-light-driven photocatalysts to remove NO pollution.
4/5/2023 12:59:02 AM +00:00
Excellent piezoresistivity of composites made from networked carbon nanotubes and polydimethylsiloxane: An intertube barrier driven strain sensing
Resistance change becomes pulse-like as the samples are bent and/or twisted, attributed to the rapid increase in intertube spacing. Straining induces movements and segmentations of tube aggregates with tube mobility ranging at 0.1e90 nm/s. Intertube barrier driven sensing mechanism is viscoelasticity related and is therefore interpreted on the basis of spring-dashpot models.
4/5/2023 12:58:55 AM +00:00
Soft actuators built from cellulose paper: A review on actuation, material, fabrication, and applications
In this focused review, the milestones and recent achievements of cellulose paper-based actuators are summarized. Electro-, thermal, moisture and magnetic actuation mechanisms are utilized to acquire energy from external stimuli. Corresponding functional materials and available fabrication techniques like film assembly and layer deposition are described.
4/5/2023 12:58:45 AM +00:00
Recent progress in multifunctional hydrogel-based supercapacitors
The state-of-the-art advanced multifunctional supercapacitors are discussed, focusing on the introductions and explanations of particularly functionalized hydrogel electrolytes, ultra-flexible textilebased electrodes or hydrogel-based electrodes, and the combination strategies of electrolytes and electrodes.
4/5/2023 12:58:35 AM +00:00
In the quest of the optimal chondrichthyan for the development of collagen sponges for articular cartilage
The limited capability of articular cartilage to self-repair renders its regeneration a formidable challenge. In the quest of the optimal material for cartilage scaffold fabrication, the use of collagen type II has been advocated, but its optimal source still remains elusive.
4/5/2023 12:58:26 AM +00:00
Polymer-ceramic fiber nanocomposite coatings on titanium metal implant devices for diseased bone tissue regeneration
The fiber composite was found to have excellent biocompatibility with significant cell growth, while the MTX-loaded PVA/HAP/FA composite showed cytotoxicity against A459 cells. The prepared fibrous composites will serve as a superior biomaterial for osteosarcoma-diseased bone repair after evidencing of in-vivo and clinical trials.
4/5/2023 12:58:17 AM +00:00
In situ synthesis of hybrid zinc oxide-silver nanoparticle arrays as a powerful active platform for surface-enhanced Raman scattering detection
As a result, the characteristic CV peaks were obvious even at a low concentration of 1010 M. In a mixture of two probes, the ZnONFs@Ag chip provided an outstanding selectivity in the quantitative and qualitative evaluation of each target molecule at low concentrations.
4/5/2023 12:58:07 AM +00:00
Review of 4D printing materials and reinforced composites: Behaviors, applications and challenges
This paper reviews the current state of 4D printing and includes the technologies, materials, shifting/deformation behaviors, applications, and challenges surrounding this innovative approach to manufacturing. Advantages of 4D over 3D are also highlighted and the novel 4D printing technology via automated fiber placement is discussed.
4/5/2023 12:57:56 AM +00:00
Novel microfluidic approaches to circulating tumor cell separation and sorting of blood cells: A review
A new approach that combines microfluidics with magnetic nanoparticles and is based on the antibody binding principle is proposed. The feasibility of implementing this combined technique will also be discussed.
4/5/2023 12:57:37 AM +00:00
Silver nanowire/PEDOT:PSS hybrid electrode for flexible organic lightemitting diodes
The perfluorinated ionomer (PFI) was also introduced into the PEDOT:PSS solution, and the resulting polymer solution was used to prepare a transparent anode on polymeric substrates.
4/5/2023 12:57:29 AM +00:00