Modulation of the electronic structure metal-based catalysts proves to be useful for optimizing catalytic activity. However, precise modulation at atomic scale remains challenging, because invariant single atoms and difficulty in achieving size limit tailored alloy particles. Herein, we report a RuCo single-atom (SAA) catalyst with precisely electron-rich Ru confined into Co lattice, skillfully fabricated by pyrolysis Ru-containing ZIF-67 tuned feed content. The SAAs is well investigated...

Silver nanoparticles prepared through reduction of AgNO3 by ethanol under refluxing conditions in polyvinyl pyrrolidone (PVP) solution were dispersed into PVP nanofibre film electrospinning. The optical properties Ag measured ultraviolet–visible (UV–vis) spectroscopy. presence face-centred cubic (fcc) crystalline silver embedded was indicated the x-ray diffractometer (XRD) pattern. morphology and distribution nanofibres observed transmission electron microscopy (TEM). interaction between...

This is the first report describing a new technology where hydrophobic nanoparticles adsorb onto much larger, hydrophilic mineral particle surfaces to facilitate attachment air bubbles in flotation. The adsorption of 46 nm cationic polystyrene 43 μm diameter glass beads, model, facilitates virtually complete removal beads by As little as 5% coverage bead with promotes high flotation efficiencies. maximum force required pull from an bubble interface into aqueous phase was measured...

MgO in blast furnace slag provides an optimum condition terms of both good flow ability and desulphurisation. The effect on is fairly well established, but its sintering sinter quality unclear especially high chromium, vanadium, titanium magnetite (Cr–V–Ti magnetite) sinters. In the present study MgO, form magnesite (MgCO3), rate was calculated. Cr–V–Ti sinters with varying content (1·95–3·01%) were tested for yield, strength reduction degradation index. Productivity comprehensive index...

In blast furnace smelting with high-alumina ore, the permeability of slag affects operational stability. The viscosity melt is a critical determinant permeability. However, behaviour and structural characteristics melts containing FeO remain insufficiently understood. this study, rotating cylinder method Raman spectroscopy were employed to investigate effects content (5–20 mass pct) w(CaO)/ w(SiO 2 ) (C/S, 1.2–1.6) on properties CaO-7 pct MgO-15 Al O 3 –SiO –FeO melt. experimental results...

Against the backdrop of rapid growth in food processing and biofuel industries across many countries, global palm oil market has become a critical component international agricultural trade. This study analyzes evolution trade network using data from 182 countries identifies associated influencing mechanisms to ensure security supply chain. The main findings are as follows: (1) over past two decades, increasingly taken on single, large-community structure, reflecting trends toward...

The potential factors contributing to safety risks on mountainous freeways exhibit significant seasonal clustering and temporal correlations. However, these characteristics have not been accurately captured by existing crash modeling methods, which severely compromise model fit may lead erroneous conclusions. This study makes three major contributions. Firstly, a multidimensional dataset involving design features, traffic conditions, pavement performance, weather conditions was established...

The use of statistical modeling methods to quantify crash causation on mountain freeways is limited by data availability and technical challenges posed excess zeros heterogeneity, resulting in a lack significant targeting proactive prevention measures freeways. We collected multidimensional crash-related information mountainous China, including road design characteristics, traffic conditions, pavement performance, weather conditions. To overcome the heterogeneity techniques, we innovatively...

Abstract Gold nanoparticles prepared by trisodium citrate reduction of HAuCl 4 in poly(vinylpyrrolidone) (PVP) ethanol solution were dispersed into PVP nanofibers electrospinning. The optical property Au before and after electrospinning was measured UV‐Vis. morphology distribution gold observed transmission electron microscopy (TEM). influence the amount added to concentration over Au/PVP studied. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci

The ability of polystyrene nanoparticles to facilitate the froth flotation glass beads was correlated hydrophobicity nanoparticles. Contact angle measurements were used probe hydrophilic surfaces decorated with hydrophobic Both sessile water drop advancing angles, θ(a), and attached air bubble receding measurements, θ(r), performed. For saturated adsorbed nanoparticles, recovery, a measure efficiency, increased increasing values each type contact angle. As expected, on...

The ability of polystyrene nanoparticles to promote glass bead flotation was measured as a function nanoparticle diameter. In all cases, smaller were more effective collectors, even when compared at constant number concentration. superior performance particles explained by two mechanisms, acting in parallel. First, deposit quickly giving those cases where deposition kinetics is rate determining; the sensitivity rates particle size illustrated kinetic measurements on quartz crystal...

The ability of polymeric nanoparticles to promote glass bead and pentlandite (Pn, nickel sulfide mineral) attachment air bubbles in flotation was measured as a function the nanoparticle transition temperature using six types based on styrene/N-butylacrylate copolymers. Nanoparticle size, surface charge density, hydrophobicity were approximately constant over series. bubble perform collectors significantly greater for softer nanoparticles. We propose that more firmly attached beads or mineral...

The viscosity of high-titanium blast furnace slag with different TiO2 content, Al2O3 and basicity was measured at 1653-1773 K using the rotational cylinder method. phase composition is by XRD. Phase diagram slags calculated FactSage software. Ionic network structure analyzed FT-IR. Results show that depolymerizes silicate structure, reducing high temperature, while increasing content generates a more complicated silicate, viscosity. Basicity affects viscosity, higher resulting in lower above...

A new route based on electrospinning is designed for the preparation of silver chloride/polyacrylonitrile (AgCl/PAN) composite nanofibres. The AgCl nanoparticles uniform in size, were dispersed surfaces Transmission electron microscopy (TEM) images gave direct evidence structure. X-ray photoelectron spectroscopy (XPS) and x-ray diffraction (XRD) confirmed presence crystals.