--UCAS

(87) Magnetic core–shell [email protected] nanoparticle catalyst for hydrolysis of cellulose, Cellulose, 2013, (88) Low CO content hydrogen production from oxidative steam reforming of ethanol over CuO-CeO2 catalysts at low-temperature, J. Energy.

Magnetic separation of old from new cracking catalyst by ...

In seeking to determine whether the heavy rare earth metals with high magnetic properties when deposited on a catalyst surface would have effective magnetic susceptibility values to enable separation of old catalyst with high level of additive from new catalyst with low additive content, while at the same time showing acceptable catalytic ...

Preparation of copper doped magnetic porous carbon for ...

2015-8-17 · High-specific-surface-area copper doped magnetic porous carbon (CuFe 2 O 4 /[email protected]) was fabricated by annealing iron, copper and 1,3,5-benzenetricarboxylic ([Cu/Fe]-BTC) metal–organic coordination polymers, which …

Maddox Catalyst: High Performance Treatment For ...

2021-11-25 · Maddox is a catalyst produced from pure manganese ore that has been treated in a special furnace using proprietary techniques. It is used as a heterogeneous catalyst for the in-line removal and/or reduction of certain …

Magnetic Catalyst | Scientific

Abstract: Magnetic catalyst was made of magnetic core and surface coating layer and obtained a core-shell complex materials. The magnetic γ-Fe 2 O3 core has a relatively higher saturation magnetization, coercivity and good thermal stability even at 500°C. In order to prevent magnetic core forming spinel structure and migrating of Fe 3+, a layer of silicon dioxide was coated by …

DESIGN OF BIMETAL CATALYSTS ON MAGNETIC …

2019-10-19 · DESIGN OF BIMETAL CATALYSTS ON MAGNETIC POROUS SILICA SUPPORT ... ferrous iron sludge and iii) the presence of iron ions after the reaction in the effluents [1]. In order to solve the above problems we designed Fe 3 O 4 /porous silica composites with ... removal of the catalyst. The temporal concentration of dyes was determined by means of UV-

Low-cost magnetic materials containing waste …

2018-6-11 · removal of organic recalcitrant contaminants [8,9]; they are based on the reaction between hydrogen peroxide as an oxidant and iron ions as a catalyst to produce highly reactive OH radicals with oxidation potential of 2.8 V. Being one · of the main drawbacks of Fenton (and related) processes, the need of operating at acidic pH, and the iron

US6099721A

A process for use of magnetic separation to remove non-magnetic particles from FCC catalyst is disclosed. A stream of circulating catalyst from a fluidized catalytic cracking (FCC) unit is charged to a magnetic separator. The catalyst is magnetically fractionated into at least three fractions, a high-metals fraction which is discarded, an intermediate-metals content fraction which is …

Frontiers | Review on Recent Progress in Magnetic ...

Iron-Platinum (FePt) and Iron-Palladium (FePd) are represented examples of metal alloy nanostructure because of being high chemical stability and magnetic crystallinity (Hou et al., 2004). FePt NPs are very useful in the field of biomedicine application, synthesis through solution-phase, or vacuum deposition.

Preparation, characterization, and applications of Fe ...

The catalysts achieve fast removal of a broad spectrum of organic pollutants in a wide pH range without the common Fe leaching. ... The use of single …

Magnetic Fe3O4/MnO2 core–shell nano-composite for …

2020-7-14 · Iron oxide like magnetite (Fe 3 O 4) and maghemite (γ-Fe 2 O 3), had been extensively applied in designing because they had a high magnetic susceptibility. The modification of Fe 3 O 4 with MnO 2 was not only removal heavy metal ions efficiently but also recovery through its magnetic property.

Magnetic nanoparticles: preparation, physical properties ...

2012-2-21 · Magnetic iron oxides are commonly used as synthetic pigments in ceramics, paints, and porcelain. Magnetic encapsulates may find very important uses in many areas of life and also in various branches of industry. Such materials are interesting from both points of the fundamental study of materials science as well as their applications [63, 64].

Synthesis, Characterization, and Magnetic Studies of ...

2017-7-20 · Efficient Removal of Organic Pollutants with Magnetic Nanoscaled BiFeO 3 as a Reusable Heterogeneous Fenton-Like Catalyst. Environmental …

CoFe2O4 magnetic nanoparticles as a highly active ...

A magnetic nanoscaled catalyst cobalt ferrite (CoFe2O4) was successfully prepared and used for the activation of oxone to generate sulfate radicals for the degradation of diclofenac. The catalyst was characterized by transmission electron microscopy, X …

Heterogeneous Fenton degradation of ofloxacin catalyzed …

2021-1-23 · Heterogeneous Fenton process is a common technique to effectively remove organic pollutants from water, in which iron-based solid catalysts play an essential role in catalyzing the decomposition of H 2 O 2 into •OH radicals (Feng et al., 2004; Wang et …

Conventional to green synthesis of magnetic iron oxide ...

2021-12-1 · Magnetic iron oxides is a potent catalysts in organic reactions. The catalyst''s efficiency can be increased if decorated with other metals, metallic oxides, and hydroxyapatites. Due to the magnetic nature, the designed catalyst containing iron oxide can degrade several dyes and can be used to carry out selective reactions of industrial interest.

Iron Oxide Nanoparticles: An Efficient Nano-catalyst ...

2021-12-7 · Magnetic iron oxide nanoparticles have attracted attention because of their idiosyncratic physicochemical characteristics and vast range of applications such as protein separations, catalysis, magnetic resonance imaging (MRI), magnetic sensors, drug delivery, and magnetic refrigeration. The activity of the catalyst depends on the chemical ...

Heterogeneous Fenton-Like Catalytic Removal of …

2020-1-3 · Moreover, the magnetic properties of the presented catalyst allow easy control and removal of the catalyst using external magnetic field. High stability of the catalyst along with a simple removal method and no disposal problems, and allowing multiple reuse without noticeable loss of efficiency demonstrates the potential value of the reported ...

Synthesis, Characterization and Applications of Iron Oxide ...

The preparation of magnetic iron oxide nanoparticles with controlled size and morphology has been carried out in water-in-oil microemulsion consisting of a cationic or non-ionic surfactant (Triton-X), a co-surfactant (glycols, hexanol, 1-butanol), oil phase (n-octane, cyclohexane) and aqueous phase (Fernandes et al. 2013 Fernandes MTC, Garcia ...

Synthesis, Characterization, and Magnetic Studies of ...

2014-1-29 · Iron oxide was formed as -Fe 2 O 3 instead of the commonly formed magnetite nanoparticles (Fe 3 O 4) or a mixture of magnetite (Fe 3 O 4) and maghemite ( -Fe 2 O 3, cubic). The obtained particles of Fe 2 O 3 have size from 15 to 42 nm. The synthesized nanoparticles were characterized by XRD, TGA/DTA, magnetic susceptibility, and TEM.

Magnetic nanocatalysts: supported metal nanoparticles for ...

2013-10-1 · Coating the magnetic NP surface is a strategy to give extra protection to the magnetic material, because naked iron oxides (e.g., magnetite) and zero-valence metals (e.g., cobalt) easily oxidize in air atmosphere, which is reflected in changes of the magnetic properties and compromises the catalyst stability.

Frontiers | The Effect of Magnetic Field on Catalytic ...

Magnetic field effects can provide a handle on steering chemical reactions and manipulating yields. The presence of a magnetic field can influence the energy levels of the active species by interacting with their spin states. Here we demonstrate the effect of a magnetic field on the electrocatalytic processes taking place on platinum-based nanoparticles in fuel cell conditions.

Removal of azo dyes pollutants: Photo catalyst and ...

Rosa Amini; Gholamreza Nabiyouni; Saghar Jarollahi. "Removal of azo dyes pollutants: Photo catalyst and magnetic investigation of iron oxide-zinc sulfide nanocomposites". Journal of Nanostructures, 11, 1, 2021, 95-104. doi: 10.22052/JNS.2021.01.011

Removal of Azo Dyes Pollutants: Photo Catalyst and ...

2021-9-20 · Removal of Azo Dyes Pollutants: Photo Catalyst and Magnetic Investigation of Iron Oxide-Zinc Sulfide Nanocomposites Rosa Amini 1, Gholamreza Nabiyouni 1,*, Saghar Jarollahi 2 1 Department of Physics, Faculty of Science, Arak University, Arak, Iran 2 Department of Science, Arak University of Technology, Arak, Iran

US6077332A

Magnetic trap for removal of iron from amines Download PDF Info Publication number US6077332A. US6077332A US09/097,217 US9721798A US6077332A US 6077332 A US6077332 A US 6077332A US 9721798 A US9721798 A US 9721798A US 6077332 A US6077332 A US 6077332A Authority US United States Prior art keywords amine iron stream …

Co-precipitation synthesis of magnetic nanoparticles for ...

2019-7-24 · The emergence of magnetic nanoparticles (MNP) has proven to be useful as a tool or catalyst in many industrial usages such as in biomedical, drug delivery, catalysis, and the environment. Due to its size, MNP has a greater surface area compared to larger particles that makes it more reactive to some other molecules.

Nano-sized magnetic iron oxides as catalysts for ...

2012-11-30 · Thus, the aim of this study was to elucidate the effects of Fe(II)/Fe(III) ratio in magnetic nano-sized iron oxides on phenol removal and H 2 O 2 decomposition at neutral pH. For this purpose: (i) commercial Fe(II, III) oxide, (ii) freshly synthesized ''stoichiometric'' magnetite, and (iii) iron oxides with over-stoichiometric Fe(II) content ...

Multifunctional magnetic iron oxide nanoparticles: diverse ...

2019-11-19 · Magnetic iron oxide nanoparticles (MIONPs) play a major role in the emerging fields of nanotechnology to facilitate rapid advancements in biomedical and industrial platforms. The superparamagnetic properties of MIONPs and their environment friendly synthetic methods with well-defined particle size have become indispensable to obtain their full potential in a variety of …

Highly efficient and recyclable catalyst: porous Fe3O4–Au ...

2020-3-13 · In this work, we reported the tailored design of highly efficient Fe 3 O 4 –Au magnetic nanocomposite (MNP) catalysts. Fe 3 O 4 nanocrystals with three different morphologies have been developed with engineered amounts of urea, and the plausible mechanism has been proposed. Then by controlling the amount of Au seeds, Fe 3 O 4 –Au MNPs with different …

Magnetic [email protected] Nanocomposite as an …

2017-7-20 · Efficient Removal of Organic Pollutants with Magnetic Nanoscaled BiFeO 3 as a Reusable Heterogeneous Fenton-Like Catalyst. Environmental Science & Technology. 44, 1786–1791, doi: 10.1021 ...