The efficiency of froth flotation drastically drops towards ultrafine particles. Some improvements may be possible using smaller bubbles and high degrees turbulence, however, reaching their limits in the nanometer particle range. Therefore, an approach is presented where nanoparticles themselves produce nanobubbles that remain attached allow, combination with small bubbles, for direct nanoparticles. Here, formation fate these surface are investigated directly dispersed systems first time....

Abstract Coatings based on titanium nitrides, carbides and silicon can optimize the surface properties of or for various applications ranging from biocompatibility to chemical stability durability. Here, we investigated a high power (100 W) pulse repetition rate femtosecond laser process ( λ =1030 nm, τ =750 fs, f =1 MHz) treatment in atmospheres argon, nitrogen, methane, ethene acetylene. In nitrogen atmosphere, homogeneous coating TiON is formed titanium. an ethene/argon atmosphere...

Abstract Dry reforming of methane (DRM) is an attractive reaction for synthesis gas production, since it converts two greenhouse gases into valuable chemical feedstock. Silica supported bimetallic catalysts with constant metal loading but varying Ni/Co ratios ( x Ni =1, 0.8, 0.6, 0.5, 0.4, 0.2, 0) were produced via spray‐drying the application in DRM, aiming at identification compositions superior activity. In this study, building block particles refer to inert framework, supporting...

This study presents a spray pyrolysis technique for fabricating mesoporous cerium oxide nanoparticles (MCNs) with tunable properties. The MCNs were extensively characterized by their morphology, crystallinity, optical properties, and surface area through transmission electron microscopy, scanning X-ray diffraction, Raman spectroscopy, UV−vis BET adsorption isotherms. We manipulated synthesis parameters to tailor these characteristics, subsequently evaluated the ability of load release...

We report a straightforward aerosol-based approach to synthesizing pure and Fe-doped TiO2 nanoparticles by continuous electrospray-assisted flame spray pyrolysis (EAFSP). Initially, were prepared electrospraying titanium diisopropoxide bis(acetylacetonate) (TDIP) at varying concentrations onto grounded flame. In this regard, various in situ (phase Doppler anemometry, high-speed camera, scanning mobility particle sizer) ex (small-angle X-ray scattering, transmission electron microscopy, BET...

The presented work discusses an analytical setup that is capable of detecting surface alterations aerosol nanoparticles. Utilizing the photoelectric effect, Aerosol Photoemission Spectroscopy (APES) introduced as online technique determines electron function (eWF) particle material at ambient pressure. Beyond detailed presentation experimental setup, limitations and possibilities APES are discussed with regard to metal oxide formation in technical ultra-clean process gases. Deploying tool...

The interaction of silane and water is discussed controversially in literature: some authors suggest monosilane react kinetically sufficiently fast enough to remove water, while others state the reaction occurs only at elevated temperatures. This question technological interest for removal unavoidable residues Ar gases. Thermodynamic calculations show that virtually complete expected with superstoichiometric addition. However, mass spectrometric infrared spectroscopic experiments give...

A gas purification setup (GPS) is presented that capable of producing ultrapure inert gases, such as nitrogen, at ambient pressure with residual oxygen concentrations 10–13 ppm and below. The GPS relies on the interaction metallic aerosol nanoparticles capture oxygen, resulting in metal oxide particle formation. finally reached level can be illustrated by 6.8 billion years needed for creation one monolayer a substrate. Consequently, processing oxygen-affine materials any size may shifted...

In this work, MnOx nanoparticles were produced by a continuous electrospray-assisted flame spray pyrolysis (EAFSP) method. regard, the precursor solutions containing manganese (II) nitrate hydrate (MnN) dissolved in 1-propanol are initially atomized into charged droplets an electrospray microdripping mode. Then, electrically enter controlled manner without requiring dispersion gas. The synthesis was carried out with variation horizontal injection locations from different heights above burner...

Zinc aluminosilicate (ZAS) glasses were synthesized along the peraluminous join (SiO2 contents between 95 and 50 mol%) by melt-quenching or sol-gel spray-drying subjected to controlled heat treatments obtain ZAS quartz solid solutions (Zn-Qz-ss). The precipitation of Zn-Qz-ss is non-stoichiometric with respect their parent glass crystals undergo a compositional evolution during annealing, even in absence secondary crystalline phases. Near-hexagonal high-quartz-like negative thermal expansion...

Spark ablation was used to continuously synthesize bimetallic L1 0 Pt/Fe nanoparticles in an aerosol process involving a furnace and hydrogen as reducing gas.

Nanoparticles produced in technical aerosol processes exhibit often dendritic structures, composed of primary particles. Surprisingly, a small but consistent discrepancy was observed between the results common aggregation models and situ measurements structural parameters, such as fractal dimension or mass-mobility exponent. A phenomenon which has received little attention so far is interaction agglomerates with admixed gases, might be responsible for this discrepancy. In work, we present an...

Abstract Die elektrohydrodynamische Zerstäubung von flüssigen Präkursoren gekoppelt mit der Flammensprühpyrolyse erlaubt die Synthese verschiedenartigen, metalloxidischen Nanopartikel. Ein Aufbau bestehend aus einem definiert verfahrbaren Brenner und einer Probennahme in Flamme eröffnet dabei Möglichkeit Erfassung Partikelgrößenverteilungen entlang Flammenhöhe. Bildung Eisenoxid‐ Siliziumdioxid‐Partikel konnte so mithilfe eines 1nm‐SMPS‐Aufbaus (Scanning Mobility Particle Sizer) auch den...

In this work, MnOx nanoparticles were produced by a continuous electrospray-assisted flame spray pyrolysis (EAFSP) method. regard, the precursor solutions containing manganese (II) nitrate hydrate (MnN) dissolved in 1-propanol are initially atomized into charged droplets electrospray microdripping mode. Then, electrically enter controlled manner without requiring dispersion gas. The synthesis was carried out with varying horizontal injection locations from different heights above burner...

Water electrolysis, a key process for hydrogen production, holds immense potential in mitigating carbon dioxide emissions when powered by renewable energy sources, thereby contributing to sustainable and clean future. Commercially available widely recognized technologies water electrolysis include the proton exchange membrane (PEMWE) traditional alkaline (AWE). In order use benefits of both systems, anion (AEMWE) method is proposed, enabling utilization non-noble catalyst materials achieving...

Abstract Invited for this month's cover is the group of Prof. Eike G. Hübner at Fraunhofer Heinrich Hertz Institute HHI, Goslar and Clausthal University Technology, Clausthal‐Zellerfeld, Germany. The picture shows a titanium plate, on which crystal structure (golden circle=Ti, blue circle=O/N/C) isomorphous TiO, TiN or TiC, respectively, has been engraved by high‐power high pulse repetition rate femtosecond laser process. process allows fast spatially resolved surface transformation to...