magnetic separation photoactivity

UDC 669 . 054 . 82 : 669 . 184 . 244 . 66 Processing and ...

magnetic separation treatment of the slag to recover the metal iron, ③ crushing and classification of the slag for grain size adjustment to manufacture the slag product, and ④ aging treatment of the slag product for improving its quality and volumetric stability. Each of …

Preparation of magnetic photocatalyst nanohybrid decorated ...

However, the separation difficulty inherent in the photocatalyst is unavoidable in these approaches. In this regard, magnetic photocatalyst nanomaterials offer promising materials as they permit convenient recovery by the external magnetic field with high degradation efficiency (Shi et al. 2006).

Enhanced magnetic separation and photocatalytic activity ...

Enhanced magnetic separation and photocatalytic activity of nitrogen doped titania photocatalyst supported on strontium ferrite. Journal of Hazardous Materials, 2012. ... Therefore, it is inherently difficult to produce titaniacoated particles with high visible light photoactivity without losses of magnetic …

Original paper Kinetics of photocatalytic degradation of ...

making of titanium dioxide with magnetic properties, Magnetic separation constitutes a more sustainable process since it prevents catalyst mass losses and the use of additional solvents. It has been established that the direct contact between the TiO 2 shell and the iron oxide magnetic cores may lead to low photoactivity because Fe 3 O 4 act

Magnetically Separable MnFe2O4/TA/ZnO Nanocomposites for ...

The introduction of magnetic nanoparticles such as manganese ferrite (MnFe 2 O 4) to nonmagnetic ZnO provides the easy separation of the photocatalyst from the treated water using a magnet and to improve its photoactivity in the visible region of the solar spectrum.

Multiwalled carbon nanotubes supported nickel ferrite: A ...

Jul 01, 2012· Highlight NiFe 2 O 4 /MWNT photocatalysts were synthesized via a onestep hydrothermal method. NiFe 2 O 4 acted as not only the magnetic part but also as the photocatalyst with the presence of MWNT. The photoactivity was evaluated by the degradation of phenol and nitrophenols under UV irradiation. The NiFe 2 O 4 /MWNT photocatalysts can be recycled conveniently using an external …

Preparation, characterisation and solar photoactivity of ...

Preparation, characterisation and solar photoactivity of titania supported strontium ferrite nanocomposite photocatalyst ... and recovered by an external magnetic field enhancing separation …

Highly Efficient visiblelightinduced photoactivity of ...

An efficient and adoptable approach of synthesizing magnetic Bi 2 WO 6 /gC 3 N 4 hierarchical microspheres of grapelike morphology is realized. The assynthesized structures exhibit highly efficient visiblelight absorption and separation efficiency of photoinduced charge.

Synthesis of magnetically separable Fe3O4PANI/TiO2 ...

Nov 01, 2016· At the same time, the superior magnetic response could satisfy the simple separation and fulfill the regeneration of the photocatalyst after being used. Then, the photoactivity and photostability of the Fe 3 O 4 PANI/TiO 2 composite photocatalysts were investigated by photodegradation of EDTA under visiblelight irradiation. 2. Experimental ...

Highly efficient magnetically separable TiO2graphene ...

The principal use of a silica (SiO2) interlayer in a magnetic photocatalyst was described by Chen and Zhao in 1999 [28] and shortly elaborated by Beydoun et al. in 2001 [29]. They indicated that the photoactivity of the magnetic photocatalyst could be increased by adding a SiO2 interlayer deposited as a shell around the magnetic particles.

Efficient visible lightinduced degradation of rhodamine B ...

Jan 20, 2017· Figure 8: The mechanism of charge separation and photoactivity of WS 2 and Ndoped WS 2 nanoflowers under visible light irradiation. ... Inset shows the magnetic separation…

Magnetic separation Wikipedia

Magnetic Separation is the process of separating components of mixtures by using magnets to attract magnetic materials. The process that is used for magnetic separation detaches nonmagnetic material with those who are magnetic. This technique is useful for not all, but few minerals such as ferromagnetic (materials strongly affected by magnetic fields) and paramagnetic (materials that are less ...

Preparation of NiFe2O4 nanoparticles and its visiblelight ...

Preparation of NiFe2O4 nanoparticles and its visiblelightdriven photoactivity for hydrogen production Article in Catalysis Communications 28:116–119 · November 2012 with 92 Reads

Photocatalytically active titanium dioxide nanopowders ...

Photocatalytically active titanium dioxide nanopowders: Synthesis, photoactivity and magnetic This content has been downloaded from IOPscience. Please scroll down to …

KIT Departments Bioengineering and Biosystems ...

Magnetic separation using a simple separator (hand magnet, batch experiment) showed a mass loss less than 3% of MT/P25 per experiment. However, using a high gradient magnetic separator (with continuous flow) less than % of MT/P25 aggregates were lost with a …

Preparation, characterisation and solar photoactivity of ...

However, the nanosized core magnetic materials are readily oxidised and altered above an annealing treatment temperature of 400_C [27,36]. Therefore, it is very difficult to produce titaniacoated particles with high visible light photoactivity without a loss of the magnetic property.

Photocatalytically active titanium dioxide nanopowders ...

Photocatalytically active titanium dioxide nanopowders: Synthesis, photoactivity and magnetic separation. JP Nikkanen 1,2, S Heinonen, E Huttunen Saarivirta, M Honkanen and E Levänen. Published under licence by IOP Publishing Ltd IOP Conference Series: Materials Science and Engineering, Volume 47, conference 1

Enhanced magnetic separation and photocatalytic activity ...

Enhanced magnetic separation and photocatalytic activity of nitrogen doped titania photocatalyst supported on strontium ferrite Azrina Abd Aziz, Kok Soon Yong, Shaliza Ibrahim, Saravanan Pichiah Introduction The advanced oxidation technologies (AOPs), are stateofart technology for treating wastewater. Among the advanced oxidation

Highly efficient magnetically separable TiO2–graphene ...

Jan 01, 2014· The photocatalyst can therefore be easily recovered from a suspension by applying an external magnetic field, as shown in Fig. 7B . Moreover, it can be almost completely recovered with a minimum loss for many cycles without diminishing both the magnetic property and photoactivity.

Photocatalytically active titanium dioxide nanopowders ...

Magnetic separation of coagulated TiO 2 and magnetite was carried out by a permanent magnet. The obtained results showed that the particle size of the powders synthesized at lowtemperature was very small and the specific surface area high.

Magnetic separations Research Papers

The former results show the possibility to discard more than 50% of the plant mass and zinc metallurgical recoveries above 90%. It also shows that the discard of contaminants, as MgO, can achieve 80%. The results for the magnetic separation have not been meaningful in comparison with the density separation.

Significant Visible Photoactivity and Antiphotocorrosion ...

The dramatic enhanced visible light photocatalytic activity and excellent antiphotocorrosion performance of CdS photocatalysts were obtained after hybridized by monolayer polyaniline. The asprepared PANICdS hybrid photocatalysts reveal the outstanding photocatalytic activity and photoelectrical conversion efficiency which can improve about and times that of the pure CdS, respectively.

CyclodextrinFunctionalized Fe3O4TiO2: Reusable, Magnetic ...

Waterdispersible, photocatalytic Fe3O4TiO2 core–shell magnetic nanoparticles have been prepared by anchoring cyclodextrin cavities to the TiO2 shell, and their ability to capture and photocatalytically destroy endocrinedisrupting chemicals, bisphenol A and dibutyl phthalate, present in water, has been demonstrated. The functionalized nanoparticles can be magnetically separated from the ...

Synthesis and performance of novel magnetically separable ...

photocatalyst separation from the treated water by applying an external magnetic field. The most popular magnetic materials as the core of magnetic photocatalysts are Fe 3O 4 [11–13]and γFe 2O 3 [14, 15]. However, the nanosized core magnetic Fe 3O 4 is easily oxidized in air and the core magnetic γFe 2O 3 transforms rapidly from γFe 2O ...

Graphene‐supported nickel ferrite: A magnetically ...

The significant enhancement in photoactivity under visible light irradiation can be ascribed to the reduction of GO, ... NiFe 2 O 4 nanoparticles themselves have a strong magnetic property, which can be used for magnetic separation in a suspension system, and, ...

High Photocatalytic Activity of Magnetically Separable ...

The strong magnetic property of MnFe2O4 nanoparticles can be used for magnetic separation in a suspension system, and therefore it does not require additional magnetic components as is the usual case. Consequently, the MnFe2O4–graphene system becomes a dual function photocatalyst.

Graphene‐supported nickel ferrite: A magnetically ...

Nov 01, 2012· Read "Graphene‐supported nickel ferrite: A magnetically separable photocatalyst with high activity under visible light, Aiche Journal" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

Preparation, characterisation and solar photoactivity of ...

magnetic properties have been proposed to resolve the separation of the suspended catalyst from the treated water, merely by the application of an exterior magnetic field [25,27–32]. Most of these studies primarily focus on TiO 2 supported on soft ferromagnetic materials [30,31,33–35].

KIT IFG Abteilungen Bioprozesstechnik und Biosysteme ...

Magnetic separation using a simple separator (hand magnet, batch experiment) showed a mass loss less than 3% of MT/P25 per experiment. However, using a high gradient magnetic separator (with continuous flow) less than % of MT/P25 aggregates were lost with a …

P22 viruslike particles constructed Au/CdS plasmonic ...

P22 viruslike particles constructed Au/CdS plasmonic photocatalytic nanostructures for enhanced photoactivity. ... introduce additional magnetic supports for magnetic separation in a suspension ...

RSC Advances

3 57 appropriate particle size or good magnetic response is the most effective method. Especially, the 58 good magnetic response can fulfill the simple magnetic separation and regeneration of the photocatalyst. For instance, Zhang et al.[11] prepared a magnetic BiOBrSiO 59 2Fe3O4 photocatalyst, 60 and their research revealed that this recyclable magnetic photocatalyst exhibited …

Optical and Photocatalytic Properties of Solar Light ...

In the present investigation, we have reported the fabrication of a lowcost, magnetically separable, solar light active NiFe2–xNdxO4 photocatalyst with different neodymium contents. The synthesized photocatalyst samples were characterized by a combination of various physicochemical techniques such as PXRD, SEM, EDS, FTIR, and UV–vis spectroscopy.

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