The iron sulfide mineral greigite, Fe3S4, has shown promising capability as a hydrogenating catalyst, in particular in the reduction of carbon dioxide to produce small organic molecules under mild conditions. We employed density functional theory calculations to investigate the {001}, {011} and {111} surfaces of this iron thiospinel material, as well as the production of hydrogen ad-atoms from ...

The single-component adsorption of CO2, CO, N2, and H2 at 25 35 °C was studied using microporous faujasite-framework zeolites (NaY NaX), activated carbons (GCN MSP), metal–organic frameworks (A100 Z1200) as starting points for the separation CO2 from syngases produced by gasifying biomass-based solid wastes. indicated isotherms uptake adsorbates strongly depended on themselves well adsorbents b...

In this work, the electropolymerization of polyaniline (PANI) is explored for its action as either a suitable coating or substrate Nickel (Ni) and Magnetite (Fe3O4) surfaces. PANI has been achieved through cyclic voltammetry (CV), potentiostatic galvanostatic electrochemical methods. The interaction between obtained surfaces ferromagnetic layers (Ni Fe3O4) investigated function pH electrolytic ...

Bifunctional magnetic and fluorescent core/shell/shell Mn:ZnS/ZnS/Fe3O4 nanocrystals were synthesized in a basic aqueous solution using 3-mercaptopropionic acid (MPA) as a capping ligand. The structural and optical properties of the heterostructures were characterized by X-ray diffraction (XRD), dynamic light scattering (DLS), transmission electron microscopy (TEM), UV-vis spectroscopy and phot...

Water-solublel-arginine-capped Fe3O4 nanoparticles were synthesized using a one-pot and green method. Nontoxic, renewable and inexpensive reagents including FeCl3,l-arginine, glycerol and water were chosen as raw materials. Fe3O4 nanoparticles show different dispersive states in acidic and alkaline solutions for the two distinct forms of surface bindingl-arginine. Powder X-ray diffraction and X...

The structure of the as-made, hydrated form of ECR-40C, synthesized in the presence of (2-hydroxyethyl) trimethylammonium (HTMA) ions as an organic structure-directing agent (OSDA) and 2 wt% (relative to alumina in the synthesis mixture) of aluminosilicate zeolite UZM-22 with the MEI topology as seeds, has been determined using synchrotron powder X-ray diffraction and Rietveld analyses. Two dif...

Constrained energy minimization, equilibrium and nonequilibrium molecular dynamics calculations, and constrained Monte Carlo simulations were used to determine the influence of the coupling between benzene adsorbed in a NaY zeolite model (Si/Al ) 2) and the framework vibrations on benzene site-to-site dynamics. Benzene at an SII site is strongly coupled to the nearby Na(II) cation, resulting in...

the purpose of the current research is investigating the phenylalanine removal by using magnetic nanoparticles (fe3o4) from water samples. the effect of ph, contact time and phenylalanine concentration on phenylalanine adsorption efficiency by magnetite nanoparticles are studied in a batch system. transmission electron microscopy (tem), x-ray diffraction patterns (xrd) and fourier transform inf...

Pollution with oil spills, a major contributor to water contamination, has remarkable effect on the economy, biodiversity, and environment. To protect marine species environment, efforts should be undertaken for developing efficient ways remove spills. The current work discusses spill removal using magnetite nanoparticles (MNPs) functionalized hydrophobic polyethyleneimine (HPEA). In this respe...

Environmental and/or occupational exposure to minerals, metals, and fibers can cause lung diseases that may develop years after exposure to the agents. The presence of toxic fibers such as asbestos in the environment plus the continuing development of new mineral or vitreous fibers requires a better understanding of the specific physical and chemical features of fibers/particles responsible for...