Grado en Química - UDC

In this TFG we have prepared magnetic nanoparticles of magnetite (Fe 3 O 4) stabilized with silica (SiO 2), and we have started their functionalization for the use in pathogen detection. Powder X-Ray Diffraction (XRD), Infrared Spectroscopy (IR), Thermogravimetric Analysis (TGA),

OXIDO DE HIERRO-MAGNETITA - A Compañía del grupo Dal ...

La magnetita es producida para ser usada especialmente en los circuitos de limpieza de medios pesados de carbón. DAL suministra "Magnetita" para la industria de lavado de carbón y la industria mineral. Empacado: En Bolsas de 50 Kgs o Bultos. A. IDENTIFICACIÓN DE PRODUCTO: Magnetita (Fe3O4) A.1.

Magnetorheology of a magnetic fluid based on Fe3O4 ...

A novel superparamagnetic magnetic fluid based on Fe3O4-immobilized-SiO2-nanospheres (MSiNPs) was developed. Both the experimental analyses and computational simulations were conducted to investigate its magnetorheology. In comparison to the pure Fe3O4 based magnetic fluid, the magnetorheological (MR) effect of the

Síntese e caracterização de nanopartículas de [email protected] ...

Resumo. Neste trabalho foi estudada a síntese e caracterização das nanopartículas magnéticas de magnetita (Fe3O4) através da co-precipitação e, sua posterior funcionalização pela sílica (SiO2), realizada via metodologia solgel. A caracterização das nanopartículas foi feita por difratometria de raios X (DRX), microscopia eletrônica.

Amino-functionalized [email protected] core–shell magnetic ...

Sep 01, 2010· A novel amino-functionalized Fe 3 O 4 @SiO 2 magnetic nanomaterial with a core–shell structure was developed, aiming to remove heavy metal ions from aqueous media. The structural, surface, and magnetic characteristics of the nanosized adsorbent were investigated by elemental analysis, FTIR, N 2 adsorption–desorption, transmission electron microscopy, …

Synthesis of magnetic core-shell [email protected]@Mg(OH)2 ...

Oct 01, 2020· Magnetic core-shell Fe 3 O 4 @SiO 2 @Mg(OH) 2 nano-composite was synthesized by the following steps. Firstly, solvothermal method was used to synthesize magnetic Fe 3 O 4 microspheres [].Ethylene glycol (40 mL) was used to solve FeCl 3 ·6H 2 O (1.35 g), CH 3 COONa (3.6 g), and PEG 10000 (1.0 g) under vigorous magnetic stirring at …

Magnetic Silica Microspheres for DNA/RNA Purification

The suspension of silica coated magnetic beads are yellowish-brown. The structure of embedding type magnetic SiO2 microspheres is that Fe3O4 magnetic nanoparticles embedded in the monodisperse silica microspheres. This type of magnetic microspheres is superficially functionalized with rich silanol groups. The dispersant is phosphate buffer.

Photocatalytic application of TiO2/SiO2-based magnetic ...

In this research we have developed a treatment method for textile wastewater by TiO2/SiO2-based magnetic nanocomposite. Textile wastewater includes a large variety of dyes and chemicals and needs treatments. This manuscript presents a facile method for removing dyes from the textile wastewater by using TiO2/SiO2-based nanocomposite ([email protected]/TiO2) …

Ultrafine Pd nanoparticles stabilized on magnetic Fe3O4 ...

Nov 06, 2020· The magnetic composites consisting of a porous graphitic carbon nitride (g-C 3 N 4) and the core-shell Fe 3 O 4 @SiO 2 were facilely prepared. Subsequently, the Pd nanoparticles (NPs) were stabilized on the composites by the in-situ reduction of PdCl 2 with sodium borohydride. The mass ratio of Fe 3 O 4 @SiO 2 to g-C 3 N 4 was optimized in view of …

Preparation and characterization of [email protected]

Jun 28, 2019· In this work, [email protected]@TiO2–Co/rGO magnetic photocatalyst was successfully prepared by a sol–gel method and a hydrothermal method. The crystalline structure and performance of the resulting catalyst have been characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffra

Preparation and Photocatalytic Activity of Magnetic Fe3O4 ...

A simple sol-gel method was used to prepare magnetic Fe 3 O 4 /SiO 2 /TiO 2 composites with core-shell structure. Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and transmission electron microscopy (TEM) have been applied to investigate the structure and morphology of the resultant composites.

Novel core-shell cerium(IV)-immobilized magnetic polymeric ...

Mar 01, 2014· The results demonstrated that the core-shell structured [email protected]@PVPA-Ce(IV) microspheres with abundant Ce(IV) affinity sites and excellent magnetic responsiveness can effectively purify phosphopeptides from complex biosamples for MS detection taking advantage of the rapid magnetic separation and the selective affinity between Ce(IV) ions and ...

Dispersive micro-solid phase extraction based on Fe3O4 ...

Jun 13, 2019· In the present work, a simple and rapid method, namely magnetic dispersive micro-solid phase extraction (MD-μ-SPE), was developed using magnetic [email protected]@Ti-MOF (metal–organic framework)-nanocomposites (NCs) as a viable and efficient sorbent to pre-concentrate and assess caffeic acid (CA) in the medical ex

MAGNETITUL – Piatra Magnet care ne echilibreaza pe toate ...

Dec 08, 2011· MAGNETITUL – Piatra Magnet care ne echilibreaza pe toate planurile (Fe3O4) MAGNETITUL este un oxid de fier, cu o duritate de 5.5 – 6.5 pe scara Mohs. Cristalizeaza in sistem octaedric. Magnetitul are proprietati magnetice, tocmai de aici venindu-i si numele. Atrage pilita de fier si poate devia acul busolei.

Fe3O4-TiO2 and Fe3O4-SiO2 Core-shell Powders Synthesized ...

Magnetite-rich powder was supplied by Green Magnetita S.A.S (Bogotá-Colombia). This industrial synthetic material was passed through a 325 ASTM mesh to obtain a fraction of particles lesser than 45 μm. The magnetic properties of this powder were preliminary checked using an ordinary magnet, observing that of powder was attracted.

Amino-Functionalized [email protected] Core-Shell Magnetic ...

[email protected] core-shell nanoparticles (NPs) were synthesized with the co-precipitation method and functionalized with NH2 amino-groups. The nanoparticles were characterized by X-ray, FT-IR spectroscopy, transmission electron microscopy, selected area electron diffraction, and vibrating sample magnetometry. The magnetic core of all the nanoparticles was shown to be …