Application of Nanostructured Iron Oxides as Adsorbents and Photocatalysts for Wastewater Pollutant Removal

Silva, Marcela Fernandes; Pineda, Edgardo Alfonso Gómez; Bergamasco, Rosângela

doi:10.5935/0100-4042.20140311

Cited by 5 publications

(4 citation statements)

References 2 publications

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“…Nanocatalyst has emerged as an alternative to increase catalytic efficiency, since it has advantages over commercial catalysts, such as higher specific surface area and porosity, making them with great potential application in heterogeneous photocatalysis 10 . One of the strategies used to increase the photocatalytic activity of nanocatalysts is the usage of hybridization with noble metal and metals, in order to reduce the recombination between photoelectrons/holes pairs and reducing the energy required to its photoactivation, allowing its application to visible radiation [11][12][13][14][15][16] .…”

mentioning

confidence: 99%

Iron oxide nanocatalyst with titanium and silver nanoparticles: Synthesis, characterization and photocatalytic activity on the degradation of Rhodamine B dye

Muraro

Mortari

Vizzotto

et al. 2020

Sci Rep

109

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nowadays, there is a growing concern about the environmental impacts of colored wastewater. thus, the present work aims the synthesis, characterization and determination of photocatalytic activity of iron oxide (fe 2 o 3) nanocatalyst, evaluating the effect of hybridization with titanium (TiNPs-Fe 2 o 3) and silver (AgNPs-Fe 2 o 3) nanoparticles, on the degradation of Rhodamine B dye (RhB). nanocatalysts were characterized by XRD, SeM, teM, ftiR, n 2 porosimetry (Bet/BJH method), zeta potential and DRS. photocatalytic tests were performed in a slurry reactor, with the nanocatalyst in suspension, using RhB as a target molecule, under ultraviolet (UV) and visible radiation. therefore, the photocatalytic activity of the nanocatalysts (non-doped and hybridized) was evaluated in these ideal conditions, where the AgNPs-Fe 2 o 3 sample showed the best photocatalytic activity with a degradation of 94.1% (k = 0.0222 min −1 , under UV) and 58.36% (k = 0.007 min −1 , under visible), while under the same conditions, the tio 2-P25 commercial catalyst showed a degradation of 61.5% (k = 0.0078 min −1) and 44.5% (k = 0.0044 min −1), respectively. According with the ideal conditions determined, reusability of the AgNPs-Fe 2 o 3 nanocatalyst was measured, showing a short reduction (about 8%) of its photocatalytic activity after 5 cycles. Thus, the Fe 2 o 3 nanocatalyst can be considered a promising catalyst in the heterogeneous photocatalysis for application in the degradation of organic dyes in aqueous solution.

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mentioning

confidence: 99%

Iron oxide nanocatalyst with titanium and silver nanoparticles: Synthesis, characterization and photocatalytic activity on the degradation of Rhodamine B dye

Muraro

Mortari

Vizzotto

et al. 2020

Sci Rep

109

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“…However, the magnetite phase (Fe 3 O 4 ) is also very promising for photocatalytic studies due to its multiple vacancies. In addition, the magnetic properties can help the separation of the reaction medium and possible reuse of the oxide [ 11 , 12 , 13 , 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Poly(butylene adipate-co-terephthalate)/Poly(lactic acid) Polymeric Blends Electrospun with TiO2-R/Fe3O4 for Pollutant Photodegradation

et al. 2023

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This work aimed to use the electrospinning technique to obtain PBAT/PLA polymer fibers, with the semiconductors rutile titanium dioxide (TiO2-R) and magnetite iron oxide (Fe3O4), in order to promote the photocatalytic degradation of environmental contaminants. The parameters used in the electrospinning process to obtain the fibers were distance from the needle to the collecting target of 12 cm, flow of 1 mL h−1 and voltage of 14 kV. The best mass ratio of semiconductors in the polymeric fiber was defined from a 22 experimental design, and the values obtained were 10% TiO2-R, 1% Fe3O4 at pH 7.0. Polymer fibers were characterized by Scanning Electron Microscopy (SEM), Differential Scanning Calorimetry (DSC), X-ray Diffraction (XRD), Thermogravimetric Analysis (TGA) and Fourier Transform Infrared (FTIR) techniques. SEM measurements indicated a reduction in fiber diameter after the incorporation of semiconductors; for the PBAT/PLA fiber, the average diameter was 0.9466 ± 0.2490 µm, and for the fiber with TiO2-R and Fe3O4 was 0.6706 ± 0.1447 µm. In the DSC, DRX, TGA and FTIR analyses, it was possible to identify the presence of TiO2-R and Fe3O4 in the fibers, as well as their interactions with polymers, demonstrating changes in the crystallinity and degradation temperature of the material. These fibers were tested against Reactive Red 195 dye, showing an efficiency of 64.0% within 24 h, showing promise for photocatalytic degradation of environmental contaminants.

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“…9,10,12,14 Entretanto, seu emprego é ainda limitado devido às elevadas taxas de recombinação do par elétron-buraco. Uma alternativa para minimizar este efeito é a formação de híbridos com nanopartículas de metais nobres como Ag, Au e Pt.…”

Section: Introductionunclassified

“…NPs de Au, Ag, Pt e Pd são ativas cataliticamente para esta reação de redução de compostos nitrogenados orgânicos. 5,14,19 21 Uma estratégia muito empregada na literatura têm sido a preparação de caroços magnéticos revestidos superficialmente com sílica (SiO 2 ). 21,22 Como a superfície da sílica é facilmente funcionalizada, grupos funcionais podem ser ligados covalentemente em sua estrutura permitindo, em uma etapa posterior, a deposição de íons metálicos seguida por sua redução para a formação das NPs metálicas.…”

Section: Introductionunclassified

Novos híbridos baseados em oxihidróxido de ferro (III) e nanopartículas de ouro (AuNPs/FeOOH) como catalisadores para a redução de poluentes orgânicos ambientais

Azevedo¹,

Reis²,

Germino³

et al. 2017

Quim. Nova

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Application of Nanostructured Iron Oxides as Adsorbents and Photocatalysts for Wastewater Pollutant Removal

Cited by 5 publications

References 2 publications

Iron oxide nanocatalyst with titanium and silver nanoparticles: Synthesis, characterization and photocatalytic activity on the degradation of Rhodamine B dye

Iron oxide nanocatalyst with titanium and silver nanoparticles: Synthesis, characterization and photocatalytic activity on the degradation of Rhodamine B dye

Poly(butylene adipate-co-terephthalate)/Poly(lactic acid) Polymeric Blends Electrospun with TiO2-R/Fe3O4 for Pollutant Photodegradation

Novos híbridos baseados em oxihidróxido de ferro (III) e nanopartículas de ouro (AuNPs/FeOOH) como catalisadores para a redução de poluentes orgânicos ambientais

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