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magnetic separation photoactivity

Enhanced magnetic separation and photocatalytic

15/01/2012 The trial runs were carried out by separating the catalyst under a strong magnetic field. A mass recovery of ∼98% was achieved with a minor loss. This loss was expected owing to its nanoparticle size. The recovered runs (Run 2) showed photoactivity similar to that of virgin catalyst (i.e., similar to that of Run 1). The Run 2 took extended time because of the diffused sunlight irradiation. Wang et al.

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(PDF) Photocatalytically active titanium dioxide

The magnetic separation of TiO2-magnetite coagulate from solution proved to be efficient around pH:8.

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Highly efficient magnetically separable

01/01/2014 A highly solar photoactive, magnetically separable, TiO 2 –graphene oxide supported SrFe 12 O 19 (TiO 2 /GO/SrFe 12 O 19) photocatalyst was synthesised via the solid reaction of silica (SiO 2 )-coated SrFe 12 O 19 with TiO 2 and GO, which were produced by a hydrothermal reaction and Hummer’s method, respectively.

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Visible light activated photocatalytic degradation of

01/04/2016 The magnetic TiO 2 photocatalysts could suspend homogeneously in the solution and be separated easily from treated water by applying an external magnetic field. However, the magnetic TiO 2 composite showed a low photoactivity and a high level of photodissolution when TiO 2 nanoparticles directly depositing onto the surface of magnetic particles [24],[25] .

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Constructing magnetic separable BiOBr/MnFe2O4

15/09/2020 Among them, BiOBr with band gap ~2.6–2.9 eV has been testified to exhibit satisfying photoactivity in degrading the recalcitrant organic pollutants into CO 2 and H 2 O . However, the fast charge carriers recombination and the difficulty of catalyst separation have severely undermined its practical applications. Establishing Z-scheme BiOBr-based nanocomposite by coupling with magnetic

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Preparation, characterisation and solar photoactivity of

titania-coated particles with high visible light photoactivity without a loss of the magnetic property. In this study, we have addressed the above limitations by producing, via hydrolysis and poly-condensation methods, a ferromagnetic catalyst made of TiO 2 supported on strontium ferrite (SrFe 12O 19) which shows sturdy magnetic properties. The catalyst can be easily recovered and

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Magnetic Cell Separation Cell Isolation Technology

Magnetic cell separation, also known as immunomagnetic cell separation or magnetic cell sorting, involves targeting cells for selection or depletion using antibodies or ligands directed against specific cell surface antigens. Labeled cells are cross-linked to magnetic particles, also known as magnetic beads, that can be immobilized once an electromagnetic field is applied. Due to its speed and

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Magnetic Separator an overview ScienceDirect

High gradient magnetic separation. The removal of small quantities of finely dispersed ferromagnetic materials from fine minerals, such as china clay, may be effectively carried out in a high gradient magnetic field. The suspension of mineral is passed through a matrix of ferromagnetic wires which is magnetised by the application of an external magnetic field. The removal of the weakly magnetic

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Waste Separation Magnetic Separation, Density

15/03/2014 About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators

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(PDF) Enhanced magnetic separation and

In recent years, magnetic based TiO2 photocatalyst synthesis has evolved as a mean to resolve the difficulty of separation of TiO2 photocatalyst from the treated water, by applying an external magnetic field [34]. Till date few reports has been reported of which most findings focused on soft ferromagnetic materials, which is magnetite (Fe3O4) that can oxidized to maghemite (_-Fe2O3), which is also

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Preparation and Photocatalytic Activity of

Magnetic separation provides a very convenient approach for removing and recycling magnetic catalysts. The magnetism of Fe “Enhanced photoactivity of silica-embedded titania particles prepared by sol-gel process for the decomposition of trichloroethylene,” Applied Catalysis B, vol. 25, no. 4, pp. 249–256, 2000. View at: Publisher Site Google Scholar; Z. Ding, G. Q. Lu, and P. F

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Magnetizing of nano-materials on example of

05/11/2014 Magnetic separation using a simple separator (hand magnet, batch experiment) showed a mass loss less than 3% of MT/P-25 per experiment. However, using a high gradient magnetic separator (with continuous flow) less than 0.3% of MT/P-25 aggregates were lost with a suspension flow rate of 250 mL/min. In both cases magnetically separated and reused MT/P-25 showed practically unchanged photoactivity.

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Preparation, characterisation and solar

Hence, TiO 2 photocatalysts with added 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 TiO2 supported on soft ferromagnetic materials [30,31,33–35]. However, the nano-sized core magnetic materials are readily oxidised and

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Multifunctional Single-Phase Photocatalysts:

Furthermore, such photoactivity and magnetic recyclability were heavily tested under high-temperature and high-viscosity conditions, which was intended to simulate the actual industrial environments. This work brings the bright light to a full availability of a new multifunctional photocatalyst, via integrating the much enhanced ferromagnetic, ferroelectric, optoelectronic properties, most

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An experimental and theoretical study on the

The synthesized nanoparticles were compared according to the separation in an external magnetic field and finally, the hydrothermal method was specified as a better synthesis method. The magnetic nanoparticles were characterized by physico-chemical analysis methods such as Vibrating Sample Magnetometer (VSM), X-ray diffraction (XRD), Fourier Transform Infrared spectroscopy (FTIR), nitrogen adsorption-adsorption isotherm and Transmission Electron Microscopy (TEM). Magnetic

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(PDF) Highly efficient magnetically separable TiO2

The separation, recovery and reuse of the catalyst from the reactor after treatment can be enabled by incorporating the photocatalyst structure into alkaline earth hexaferrite with magnetic properties [17–19]. This material offers a potential approach for the recovery and reusability of the photocatalyst [20–22]. Preventing agglomeration and maintaining the durability conditions of the catalysts is vital for any

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Photocatalytically active titanium dioxide

Original language: English: Title of host publication: 2nd International Conference on Competitive Materials and Technological Processes ICCMTP2, October 8-12, 2012, Miskolc-Lillafüred, Hungary

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Photocatalytically active titanium dioxide

Alkuperäiskieli: Englanti: Otsikko: 2nd International Conference on Competitive Materials and Technological Processes ICCMTP2, October 8-12, 2012, Miskolc-Lillafüred, Hungary

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Highly Enhanced Photoactivity of Anatase TiO2

In our case, H-aTiO 2 nanocrystals hydrogenated at 600 °C for longer than 10 h showed 10 times higher photoactivity than aTiO 2, which was explained from a high surface-to-bulk defect ratio and a nonuniform distribution of defects between bulk and surface due to a preferential diffusion of bulk defects to the surface. Our study showed that a kinetically controlled hydrogenation condition could be used not only to control the surface/bulk defects but also to enhance the photoactivity

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(PDF) Enhanced magnetic separation and

In recent years, magnetic based TiO2 photocatalyst synthesis has evolved as a mean to resolve the difficulty of separation of TiO2 photocatalyst from the treated water, by applying an external magnetic field [34]. Till date few reports has been reported of which most findings focused on soft ferromagnetic materials, which is magnetite (Fe3O4) that can oxidized to maghemite (_-Fe2O3), which is also

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(PDF) Enhanced magnetic separation and

The mixture was son- In recent years, magnetic based TiO2 photocatalyst synthesis icated for 15 min to well mix the substances, then dried, grinded, has evolved as a mean to resolve the difficulty of separation of and calcined for 30 min at 400 C. Hence, the magnetically separable TiO2 photocatalyst from the treated water, by applying an exter- N-doped TiO2 supported on SrFe12 O19 photocatalyst was obtained. nal magnetic

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Preparation and Photocatalytic Activity of

Magnetic separation provides a very convenient approach for removing and recycling magnetic catalysts. The magnetism of Fe “Enhanced photoactivity of silica-embedded titania particles prepared by sol-gel process for the decomposition of trichloroethylene,” Applied Catalysis B, vol. 25, no. 4, pp. 249–256, 2000. View at: Publisher Site Google Scholar; Z. Ding, G. Q. Lu, and P. F

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Significant Visible Photoactivity and

The rapid transferring of hole and high separation efficiency of electron−hole pairs lead to the dramatically enhanced photoactivity and completely inhibited photocorrosion.

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RSC Advances

58 good magnetic response can fulfill the simple magnetic separation and regeneration of the photocatalyst. For instance, Zhang et al.[11] prepared a magnetic [email protected] 59 [email protected] photocatalyst, 60 and their research revealed that this recyclable magnetic

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Multifunctional Single-Phase Photocatalysts:

(a) Photograph of BFCTO-0.25 (right) and BFTO (left) placed nearby a bar magnet after 4 min; (b) Sketch of to monitor the light transmittance; (c) Dependence of the transmittance intensity of the

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Preparation, characterisation and solar

The catalyst can be fluidised and recovered by an external magnetic field enhancing separation and mixing efficiency. Furthermore, it resulted in a reduced band gap (≈2.3 eV) which resulted in enhanced visible light absorption compared with unsupported TiO2. The photocatalytic activity was investigated by degrading a recalcitrant phenolic compound, viz., 2, 4-dichlorophenol (2,4-DCP) as

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Internal electric field engineering for steering

Tracing back to the physics of the charge separation, it is the internal or surface IEF of the photocatalyst that provides the driving force. The IEF engineering has been demonstrated to be a promising strategy for steering photogenerated charge separation in photocatalytic systems recently. In this review, we traced the source of IEF, gave the measurement of IEF and summarized the enhancement methods of IEF. As examples of IEF accelerating the separation

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Highly Enhanced Photoactivity of Anatase TiO2

In our case, H-aTiO 2 nanocrystals hydrogenated at 600 °C for longer than 10 h showed 10 times higher photoactivity than aTiO 2, which was explained from a high surface-to-bulk defect ratio and a nonuniform distribution of defects between bulk and surface due to a preferential diffusion of bulk defects to the surface. Our study showed that a kinetically controlled hydrogenation condition could be used not only to control the surface/bulk defects but also to enhance the photoactivity

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Titanium dioxide Wikipedia

This photoactivity is reportedly most pronounced at the {001} planes of anatase, although the {101} planes are thermodynamically more stable and thus more prominent in most synthesised and natural anatase, as evident by the often observed tetragonal dipyramidal growth habit.

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