A facile approach for the synthesis of magnetic separable Fe3O4@TiO2, core–shell nanocomposites as highly recyclable photocatalysts

Xin, Tiejun; Ma, Mingliang; Zhang, Hepeng; Gu, Junwei; Wang, Shuangjie; Liu, Mengjiao; Zhang, Qiuyu

doi:10.1016/j.apsusc.2013.09.108

Cited by 201 publications

(68 citation statements)

References 31 publications

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“…12 The incorporation of magnetic properties of iron oxides such as magnetite or maghemite in TiO 2 -based catalysts facilitates its removal from the aqueous solution by application of an appropriate magnetic field, reducing costs and time spent in the extraction of the catalyst to permit its recycling. 13,14 In addition to its magnetic properties, the iron oxide creates additional energy levels to capture electrons from the conduction band and holes from the valence band of TiO 2 , promoting a more effective separation of charges and reducing electronic recombination.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Enhanced Photocatalytic Activity of Iron Oxide/Carbon Nanotube/Ag-doped TiO2 Nanocomposites

Neto¹,

Bellato²,

Souza³

et al. 2017

J. Braz. Chem. Soc.

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A novel magnetically recoverable catalyst (Fe/MWCNT/TiO 2 -Ag) was prepared in this study by a process that involves few steps. Titanium dioxide doped with silver and iron oxide was deposited on support of multi-walled carbon nanotubes (MWCNT). The synthesized catalysts were characterized by inductively coupled plasma mass spectrometry (ICP-MS), N 2 adsorption/desorption, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), infrared spectroscopy (IR) and UV-Vis diffuse reflectance spectra (DRS). Phenol in aqueous solution (50 mg L -1 ) was used as a model compound for evaluation of UV-Vis (filter cut off for λ > 300 nm) photocatalytic activity. The composite catalyst has a high photocatalytic activity, destroying ca. 100% of phenol and removing 85% of total organic carbon in an aqueous solution after 180 min. The Fe/MWCNT/TiO 2 -Ag catalyst remained stable, presenting an 8% decrease in phenol degradation efficiency after ten consecutive photocatalytic cycles.

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Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Enhanced Photocatalytic Activity of Iron Oxide/Carbon Nanotube/Ag-doped TiO2 Nanocomposites

Neto¹,

Bellato²,

Souza³

et al. 2017

J. Braz. Chem. Soc.

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“…Some studies evaluated the use of magnetite (Fe 3 O 4 ) cores. [14][15][16][17] Recently, more stable transition-metal incorporated MFe 2 O 4 (M = Ni, Co, Fe, Sr) super-paramagnetic materials have been used as core materials and have produced good results for the photocatalytic destruction of organic compounds. [18][19][20][21] On the other hand, oxygenated cores are difficult to activate under visible-light, so materials containing sulfur or nitrogen are used.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Core@shell Structured CuFeS2@TiO₂Magnetic Nanomaterial and Its Application for Hydrogen Production by Methanol Aqueous Solution Photosplitting

Kang¹,

Kwak²,

Park³

et al. 2014

Bulletin of the Korean Chemical Society

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A new magnetic semiconductor material was synthesized to enable separation after a liquid-type photocatalysis process. Core@shell-structured CuFeS 2 @TiO 2 magnetic nanoparticles were prepared by a combination of solvothermal and wet-impregnation methods for photocatalysis applications. The materials obtained were characterized using X-ray diffraction, transmission electron microscopy, ultraviolet-visible, photoluminescence spectroscopy, Brunauer-Emmett-Teller surface area measurements, and cyclic voltammetry. This study confirmed that the light absorption of CuFeS 2 was shifted significantly to the visible wavelength compared to pure TiO 2 . Moreover, the resulting hydrogen production from the photo-splitting methanol/water solution after 10 hours was more than 4 times on the core@shell structured CuFeS 2 @TiO 2 nanocatalyst than on either pure TiO 2 or CuFeS 2 .

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“…2f shows the FTIR spectra for Fe 3 O 4 /SnO 2 /NGP composites, while the FTIR spectra for Fe 3 O 4 /SnO 2 /graphene composites is shown in Fig. 2g [7]. The absorptions in range of 3400 cm -1 and 1634 cm -1 indicate the O-H group stretching and bending vibration modes originating from water molecule [14] while absorption in the range of 1220 cm -1 and 1527 cm -1 indicates the C-OH and C-O stretching vibration modes [15,16].…”

Section: Resultsmentioning

confidence: 99%

“…Because of their several advantages, SnO 2 potentially to be ideal catalyst. However, as a photocatalyst, SnO 2 has several fundamental issue for photocatalytic application such as: (1) the difficulty process of splitting the catalyst material from dye waste after photocatalytic process [7]; (2) The recombination rate of electron and hole pairs are too rapid [8].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Photocatalytic Performance of Different Types of Graphene in Fe₃O₄/SnO₂ Composites

Paramarta

Taufik

Saleh

2017

J. Phys.: Conf. Ser.

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Abstract.We have reported the role of annealing temperature Fe 3 O 4 /SnO 2 nanocomposites as a photocatalyst for remove methylene blue (MB) dye from aqueous solution. However, how to enhanced the degradation performance of Fe 3 O 4 /SnO 2 nanocomposites is important to its photocatalytic application. Therefore, in this work Fe 3 O 4 /SnO 2 nanocomposites was combined with two different types of graphene materials (NGP and grahene) to improve the photocatalytic performance for remove methylene blue (MB) dye. Fe 3 O 4 /SnO 2 /NGP and Fe 3 O 4 /SnO 2 /graphene have been successfully synthesized by co-precipitation method. The influence of two types graphene on Fe 3 O 4 /SnO 2 nanocomposites properties were systematically investigated by means of X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and Thermal gravimetric analysis (TGA). Degradation of methylene Blue (MB) in aqueous solution was studied in detail under photocatalytic process. Effect of catalyst dosage (0.1-0.4 g/L) and scavengers on dye degradation were carried out to check the efficiency of photocatalyst. The results indicated Fe 3 O 4 /SnO 2 /graphene displayed higher photocatalytic activity than other catalyst. The reusability tests have also been done to ensure the stability of the used photocatalyst.

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A facile approach for the synthesis of magnetic separable Fe3O4@TiO2, core–shell nanocomposites as highly recyclable photocatalysts

Cited by 201 publications

References 31 publications

Synthesis, Characterization and Enhanced Photocatalytic Activity of Iron Oxide/Carbon Nanotube/Ag-doped TiO2 Nanocomposites

Synthesis, Characterization and Enhanced Photocatalytic Activity of Iron Oxide/Carbon Nanotube/Ag-doped TiO2 Nanocomposites

Synthesis of Core@shell Structured CuFeS2@TiO₂Magnetic Nanomaterial and Its Application for Hydrogen Production by Methanol Aqueous Solution Photosplitting

Comparison of Photocatalytic Performance of Different Types of Graphene in Fe₃O₄/SnO₂ Composites

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A facile approach for the synthesis of magnetic separable Fe3O4@TiO2, core–shell nanocomposites as highly recyclable photocatalysts

Cited by 201 publications

References 31 publications

Synthesis, Characterization and Enhanced Photocatalytic Activity of Iron Oxide/Carbon Nanotube/Ag-doped TiO2 Nanocomposites

Synthesis, Characterization and Enhanced Photocatalytic Activity of Iron Oxide/Carbon Nanotube/Ag-doped TiO2 Nanocomposites

Synthesis of Core@shell Structured CuFeS2@TiO2Magnetic Nanomaterial and Its Application for Hydrogen Production by Methanol Aqueous Solution Photosplitting

Comparison of Photocatalytic Performance of Different Types of Graphene in Fe3O4/SnO2 Composites

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Product

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Synthesis of Core@shell Structured CuFeS2@TiO₂Magnetic Nanomaterial and Its Application for Hydrogen Production by Methanol Aqueous Solution Photosplitting

Comparison of Photocatalytic Performance of Different Types of Graphene in Fe₃O₄/SnO₂ Composites