The efficient separation and transfer of photogenerated charge carriers play indispensable roles in improving the photocatalytic H2 evolution activity. Herein, we designed a Ni2O3-modified Mn0.2Cd0.8S/Cu3[email protected]2S (MCS/CPS) p-n heterojunction structure with a porous morphology for efficient and stable photocatalytic H2 evolution under visible-light irradiation. Novel porous Cu3[email protected]2S

The combination of multiple active components and engineering of reasonable structures are effective strategies to prepare high-performance electrochemical electrodes. Herein, a specially designed Bi2S3–[email protected] core-shell structure is synthesized using ZIF-67 as a template, in which nanoparticles of Bi2S3 and CoS in the composites are surrounded by a carbon layer with a sufficient amount

Catalytic doping is an important strategy for enhancing the hydrogen storage performance of magnesium hydride. Hence, LaNi4.5Mn0.5 submicro-particles were successfully prepared via a facile wet chemical ball milling method. To further study the catalytic performance, various amount of as-received LaNi4.5Mn0.5 were introduced to MgH2 and the submicro-LaNi4.5Mn0.5 showed best catalytic effect on MgH2

Li1+xTi2-xAlx (PO4)3 (LTAP) x = 0.3, 0.4, 0.5 and 0.7) compounds, prepared at 800 °C by sol-gel, have been studied by X-ray diffraction, Nuclear Magnetic Resonance, Scanning Electron Microscopy and Impedance Spectroscopy. The increment of lithium enhances Li–Li repulsions, favoring the creation of vacancies at the conduction paths intersection (M1 sites), increasing Li mobility along (… M1-M2-M1 …)

Understanding the hot deformation behaviors of materials has a great importance in hot working and shaping for promoting their industrial application. In this study, a Ti-based metallic glassy matrix composite was employed to study the deformation behaviors in supercooled liquid region at strain rates of 10−4/s - 10−2/s by compression tests. The stress-strain curves were composed of the overshoot behavior

The isothermal oxidation of 8 wt% Y2O3 stabilized ZrO2 (YSZ) thermal barrier coating (TBC) and growth behavior of thermal growth oxide (TGO) have been investigated. The average thicknesses of oxide scale and internal oxidation zone of the substrate with coating are significantly smaller compared with the bare substrate. The TGO layer evolves from a black single-layer to a double-layer structure. The

In this work, Ag2Mo1-xWxO4 (x = 0, 0.25, 0.50, 0.75 and 1 mol%) heterostructures were synthesized by a microwave-assisted hydrothermal (MAH) method under 140 °C. The powders are characterized by X-ray diffractogram (XRD), Raman spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy, and spectroscopy in the ultraviolet–visible region (UV–Vis). The photocatalytic degradations

Low cost and efficient electrocatalysts are extremely attractive for hydrogen evolution reaction (HER). Here, three-dimensional hybrid Co3O4@NiWO4 nanocone arrays are firstly constructed by a simple and effective strategy on nickel foam. Due to the open space and enriched active areas provided by the special nanocone arrays heterostructure, Co3O4@NiWO4 exhibits excellent HER performance. The overpotential

The N-doped carbon coated Fe3O4 composites (Fe3O4@NC) are successfully fabricated on a polyacrylonitrile (PAN) phase inversion method and subsequently annealing. Compared with common electrospinning method, needing delicate equipment and strict reaction conditions, this method is facile and ingenious to synthesize PAN-based composites or carbon-coated materials. Applied to lithium ion batteries (LIBs)

Mo–Cu composites exhibit excellent physical and mechanical properties, while the problems of densification and interface seriously limit their application. In this paper, the effect of element Zr on the properties of Mo–Cu composites is investigated aiming to overcome these critical issues. Various compositions of Mo–Cu–Zr ternary composites were fabricated via ball milling, cold isostatic pressing

Ribbons of a Ni55Fe19Ga26 Heusler alloy were prepared by melt spinning technique. The effect of pressure on magnetostructural transitions was studied comparing as-spun ribbons to ribbons previously submitted to an axial pressure and to powder obtained from manually grinded as-spun ribbons. The martensitic transformation present in the as-spun ribbon almost vanishes after pulverization. The structural

Using particle swarm optimization algorithm, we predicted two new atmospheric phases and two new high pressure phasess for OsB2 in the pressure range from 0 to 100 GPa. By first-principles calculations with density functional theory, we further investigate the structure, phase stability, elastic properties, hardness, electronic properties for these structures. Results show that they are all thermodynamically

Here, the thermal and electrical properties of Al doped ZnO were synergistically improved by using high temperature and high pressure (HPHT) technology. HPHT treatment to modulate its crystal structure and microstructure. We simulated this process using first-principles calculations and finite element analysis. Increasing the synthesis pressure improved the electrical and thermal properties. As the

Ca19(1-x)M2(PO4)14:19xEu3+ (M = Mg, Zn) (x = 0.05, 0.07, 0.09, 0.10, 0.11 and 0.12) red phosphors were successfully synthesized by the high-temperature solid-phase reaction method. The phase composition, morphology and characteristic photoluminescence properties of Ca19Mg2(PO4)14 (CMPO):Eu3+ and Ca19Zn2(PO4)14 (CZPO):Eu3+ were analyzed by X-ray powder diffraction (XRD), field emission scanning electron

The hydride phase of Ti50V20Cr30 alloy cast with 4 wt% of 7Zr+10Ni has been investigated. Pressure composition desorption isotherms were measured at 150 °C and 200 °C. These isotherms revealed same desorption of 1.5 wt% at 150 °C and 200 °C. The evolution of the crystal structure upon dehydrogenation was investigated by in-situ neutron diffraction. A sample was fully deuterated at room temperature

In this article, high dense glasses based heavy metal former and modifier have been synthesized. The glass system with composition formula of (60-x)TeO2–10GeO2 -20ZnO–10BaO - xBi2O3 (where x = 2.5, 5, 7.5, and 10 mol. %). The glasses have been produced using the usual melt, quenching, and annealing process. Many physical features were investigated. To confirm the amorphous nature of theses glasses

The solid state phase equilibria in the ternary Er-Nd-Fe system at 1073 K in all the composition ranges were investigated using the experimental results of the X-ray powder diffraction analysis (XRD) as well as those obtained from the Scanning electron microscopy (SEM) equipped with Energy dispersive spectroscopy (EDS). The binary systems Er–Fe, Er–Nd and Nd-Fe were investigated prior to the study

Potassium-ion batteries (PIBs) are advanced and promising energy storage systems because of their abundant potassium resources and low cost. However, the large radius of K+ (1.38 Å) makes it diffuse slowly in the solid electrode and the electrode material volume changes greatly, resulting in the lack of satisfactory materials with high cycle performance and rate capability. Herein, first-principles

In this study, Ni foam, Cu coated Ni foam and Cu-Ni alloy foams were used as strengthening phases for pure Sn solder. Cu-Cu joints were fabricated by soldering with these Sn-based composite solders at 260 °C for different times. The tensile strength of pure Sn solder was improved significantly by the addition of metal foams, and the Cu-Ni alloy/Sn composite solder exhibited the highest tensile strength

The geometrical, electronic and catalytic properties of PtnAgn (n = 1–7) clusters are investigated by means of density functional theory (DFT) computations. The ground state structures are obtained by a structure search procedure based in the simulated annealing method. In general, the PtnAgn clusters adopt structures with Pt cluster motifs at the central position surrounded by silver islands. We found

Organic-inorganic lead halide perovskite solar cell is on the spotlight due to its low fabrication cost and excellent optoelectronic properties. SnO2 is considered as a promising alternative for TiO2 as the electron transport layer due to its high charge mobility. Here we report on a combustion method to prepare high-performance SnO2 extraction layer. Compared to SnO2 from the conventional solution-processed

Oxygen evolution reaction (OER) is crucial for electrochemical water splitting. However, corrosive issues in the alkaline environment impede its applications. Here, we explore the corrosion-resistant multiphase Ni3Al-based intermetallic alloy (Ni3Al alloy) as self-supported OER catalysts for the first time. A two-step treatment, annealing at high-temperature followed by acid oxidation is performed

Based on the electrochemical-thermal coupling model of lithium-ion battery, the electrochemical behavior and parameter sensitivity identification of the numerical model are profoundly studied. Also, the internal physico-chimica evolution and design optimization under different working conditions are analyzed. On this basis, summarized is the sensitivity of 23 parameters such as electrode structure

Efficient electrocatalysts based on earth-abundant elements are urgently required for promoting the efficiency of electrochemical water splitting. In this work, heterostructures of CoNi2S4/Ni3S2 on nickel foam (CoNi2S4/Ni3S2@NF) are synthesized by a facile one-step hydrothermal method as promising bifunctional electrocatalysts. To achieve an electrocatalytic current density of 10 mA cm−2 in 1 M KOH

We studied the crystallographic characteristics of the Al18Mg3Ti2 intermetallic phase in a solution-treated Al–7.6Zn–2.6Mg–2.0Cu–0.1Zr–0.07Ti (wt.%) alloy utilizing transmission electron microscopy (TEM). Cubic spinel Al18Mg3Ti2 intermetallic phase features {111} faceted interfaces with the Al matrix. Selected-area electron diffraction pattern, stereographic projection, and atomic projection studies

Controlled substitution of Praseodymium (Pr) in place of Lanthanum (La) was performed in La1.4-xPrxCa1.6Mn2O7 (x = 0.0, 0.1, 0.2, 0.3 and 0.4) to explore a possible enhancement in the magnetic and magnetocaloric properties of the material. The samples were produced following the solid-state reaction route. Rietveld refined XRD profiling was used that established the bilayer tetragonal structure (I4/mmm)

Refractory high-entropy alloys (RHEAs) usually have a high strength at elevate temperatures. However, their oxidation resistance is inferior for practical applications. Here we proposed a eutectic design of compositionally complex eutectic alloy (CCEA) by adding 10 at. % Ta to the Al2Co28Cr20Fe25Ni25, the resulting alloy shows a good combination of mechanical properties and oxidation resistance, e

In this work, the deformation behaviours of the Ti33Zr30Cu9Ni5.5Be22.5 bulk metallic glass (BMG) in the supercooled liquid region (SLR) were explored through a series of uniaxial compression experiments with a Gleeble 3500 thermal simulator at different strain rates. Results showed two main deformation modes in the SLR: plastic flow and brittle fracture. With increasing temperature and decreasing strain

In the present work, an optimum set of microwave sintering parameters was used to fabricate a newly developed biomaterial, namely Mg3Zn1Ca15Nb, with improved mechanical and bio-corrosion properties. In the recent work by authors, sintering parameters were optimized using the conventional sintering route (R1) to sinter Mg3Zn1Ca15Nb, which resulted in improved mechanical and degradation properties. Subsequently

Secondary(S-NCM) and monocrystalline (M-NCM) LiNi0.5Co0.2Mn0.3O2 cathode materials were prepared via synthesizing Ni-Co-Mn hydroxide precursors following by heat treatment operations. The materials of S-NCM and M-NCM are characterized by various means in order to describe the microstructure in detail, such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy

The efficient reutilization of electrode materials in waste lithium-ion batteries (LIBs) is an urgent and tough problem that grows along with the rapid increase in the use of LIBs in various areas, including portable electronic products, electric vehicles and backup power supplies. Herein, we propose a promising way to recover the LiCoO2 positive electrode material from the recycled LIBs via structure

Silicon is regarded as one of the most promising anode materials for high performance lithium-ion battery (LIB) due to its high theoretical specific capacity. However, the low electrical conductivity and the severe volume change during charging and discharging process result in poor cyclic performance. In this study, a low cost, high-purity silicon powder from the sawing waste in photovoltaic industry