The chromium terephthalate MIL-101 is a mesoporous metal-organic framework (MOF) with unprecedented adsorption capacities due to the presence of giant pores. application an external pressure can effectively modify open structure MOFs and its interaction guest molecules. In this work, we study under by synchrotron X-ray diffraction infrared (IR) spectroscopy several transmitting media (PTM). Our experimental results clearly show that when solid medium as NaCl employed, irreversible...

Abstract Platinum group metals (PGMs) palladium, platinum, and ruthenium represent the key materials for automotive exhaust gas treatment. Since there are no adequate alternatives, importance of these industry is steadily rising. The high value PGMs in spent catalysts justifies their recycling. Therefore, it really important to recovery platinum from aqueous solutions. Of many procedures, adsorption a process with good efficiency, but an role played by adsorbent material used into process....

The aim of this study is to obtain and characterize alginate-based membranes, as well choose the most suitable membrane type for transdermal release methotrexate. paper presents synthesis four types membranes based on alginate which are added other copolymers (Carbopol, Tween, Polyvinylpyrrolidone) components with different roles. Membranes binary mixtures made between used in methotrexate analyzed by thermogravimetric techniques, FTIR UV spectroscopic techniques SEM. analyses establish...

Understanding cellular interaction with nanomaterials represents a subject of great interest for the validation new diagnostic and therapeutic tools. A full characterization designed product includes evaluation its impact on specific biological systems, including study cell behavior as response to that particular interaction. Copper copper-based nanoparticles (CuO NPs) have emerged valuable building blocks various biomedical applications such antibacterial disinfecting agents infectious...

The adsorptive potential has been evaluated for the aminopropyl functionalized mesoporous silica materials obtained by co-condensation and post grafting methods. Nitrogen sorption, small angle neutron X-ray scattering (SANS SAXS) demonstrated high surface area well-ordered hexagonal pore structure suitable applications as adsorbents of metals from waste waters. A comparison Cr(VI) adsorption properties prepared different functionalization methods performed. results capacity due to affinity...

The aim of this paper is to provide a simple and efficient photoassisted approach synthesize silver nanoparticles, elucidate the role key factors (synthesis parameters, such as concentration TSC, irradiation time, UV intensity) that play major in photochemical synthesis nanoparticles using both reducing stabilizing agent. Concomitantly, we an easy way evaluate particle size based on Mie theory. One advantages method can be "activated" whenever or wherever are needed, by premixing reactants...

Due to the increased demand for palladium, as well due its reduced availability in nature, recovery from diluted waste solutions becomes a necessity, and perhaps an emergency. As result of economic technological development, new materials with improved adsorbent properties that are more efficient metallic ions' were synthesized introduced market. The goal this study was obtain material by functionalizing through impregnation commercial polymeric support both inexpensive environmentally...

In this study, we report the successful synthesis of monometallic Pt(2 wt.%)/MIL-101(Cr) and bimetallic Au(1 wt.%)-Pt(1 catalysts with low dimension MeNPs by double-solvent (DS) method. The were characterized powder X-ray diffraction (PXRD), N2 sorption analysis (BET), thermogravimetric (TGA), photoelectron spectroscopy (XPS), temperature-programmed reduction (TPR), transmission electron microscopy (TEM). characterization results demonstrated presence well-dispersed Pt Au-Pt nanoparticles...

Ruthenium, as an industrial by-product or from natural sources, represents important economical resource due to its specific applications. A complex problem is represented by ruthenium separation during reprocessing operations, therefore, different materials and methods have been proposed. The present study aims develop a new material with good adsorbent properties able be used for recovery adsorption aqueous solutions. Absorbent was obtained using chitosan (Ch) surface modification...

(1) Background: The prevention of demineralizing lesions at the enamel structure level continues to represent a challenge in daily dental practice. When bacteria influence pH level, this will decrease below threshold for remineralization and dissociation hydroxyapatite occur with high percentage phosphate calcium loss. These elements continue be studied by many authors order obtain working protocol that lead their stabilization structure, thus preventing demineralization process. aim study...

Manganese doped crystalline copper oxide (CuO:Mn) and undoped CuO were prepared at room temperature by the hydrothermal method. The complete physico-chemical characterization of materials was performed using X-ray diffraction (XRD), transmission/scanning electron microscopy (TEM/SEM), photoelectron spectroscopy (XPS). Furthermore, their analytical applicability tested in electrochemical experiments for a dopamine assay. According to morphological investigation, had flat structure with nearly...

Reducing the costs associated with water management, improving quality and environment are fundamental requirements of sustainable development. Maintaining optimal level phosphorus has a direct impact on biological system. Current methods used in tertiary wastewater treatment for removal present several disadvantages that influence final processing cost. Therefore, it is essential food safety to develop ecological, cheap highly efficient materials. This study reported first comparative...

The study of new useful, efficient and selective structures for the palladium ions' recovery has led to development a series macromolecules. Thus, this presents comparative behavior two crown benzene ethers that modify magnesium silicate surface used as adsorbent palladium. These are dibenzo18-crown-6 (DB18C6) dibenzo 30-crown-10 (DB30C10). obtained materials were characterized by scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDX) Fourier-transform infrared...

Due to their electroconductive properties, flexible open-cell polyurethane foam/silver nanowire (PUF/AgNW) structures can provide an alternative for the construction of cheap pressure transducers with limited lifetimes or used as filter media air conditioning units, presenting bactericidal and antifungal properties. In this paper, highly metal-polymer hybrid foams (MPHFs) based on AgNWs were manufactured characterized. The electrical resistance MPHFs various degrees AgNW coating was measured...

Metal–organic frameworks (MOFs) are ideal platforms for new and original functionalization, as the confinement of metallic nanoparticles (NPs) within their pores. However, insertion NPs could impact framework's mechanical stability, thus affecting performances in applications. Indeed, MOFs usually loose powders that need to be compressed increase volumetric density before being employed gas adsorbers. Here, we investigate high-pressure behavior mesoporous MOF MIL-101 loaded with Pd (20, 35...

Abstract Water represents an essential resource for life and all natural processes. Our existence our economic activities are totally dependent on this precious resource. It is well known that into the developing countries main of drinkable water represented by underground waters, so their contamination with arsenic a real problem needs to be solved. To solve pollution, it was necessary develop series chemical, physicochemical biological methods reduce concentrations from water. From these...

MIL-53 and the MIL-53–Al2O3 composite synthesized by a solvothermal procedure, with water as only solvent besides CrCl3 benzene-1,4-dicarboxylic acid (BDC), were used catalytic supports to obtain novel MIL-53-based catalysts Ni(10 wt.%)/MIL-53 wt.%)/MIL-53–Al2O3. Ni nanoparticle deposition an adapted double-solvent method leads uniform distribution of metallic particles, both smaller (≤10 nm) larger ones (10–30 nm). Ni/MIL-53–Al2O3 show superior thermal stability Ni/MIL-53, while samples...