Decolorization of methylene blue by heterogeneous Fenton reaction using Fe3−xTixO4 (0≤x≤0.78) at neutral pH values

Yang, Shijian; He, Hongping; Wu, Dongrui; Chen, Dong; Liang, Xiaoliang; Qin, Zhan-Fen; Fan, Minguang; Zhu, Jianxi; Yuan, Peng

doi:10.1016/j.apcatb.2009.01.012

Cited by 179 publications

(125 citation statements)

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“…Their characteristic peaks correspond very well to the standard card of maghemite (JCPDS 39-1346). If there were some amorphous TiO 2 in synthesized Fe 3-x Ti x O 4 , it should transform to rutile (or anatase) after the calcination at 350°C for 3 h. 5 As shown in Figure 2, the characteristic peaks corresponding to rutile and anatase did not appear. This suggests that there was no amorphous TiO 2 in synthesized Fe 3-x Ti x O 4 , 5 so Ti was introduced into the spinel structure of synthesized (Fe 3-x Ti x ) 1-δ O 4 .…”

Section: Resultsmentioning

confidence: 97%

“…35 Crystal sizes of synthesized samples were calculated with the Scherrer's equation. 5 The nucleation of Ti 4þ preferred to yield an amorphous hydroxide or hydroxide oxide, 44 so the crystal size of synthesized (Fe 3-x Ti x ) 1-δ O 4 (x 6 ¼ 0) decreased with the increase of Ti content (shown in Table 1). This result was consistent with the observation of BET surface area (shown in Table 1).…”

Section: Resultsmentioning

confidence: 99%

“…After 4 washings, the particles were collected and dried in a vacuum oven at 105°C for 24 h. The characterization of XRD and M€ ossbauer in previous studies demonstrated that synthesized Fe 3-x Ti x O 4 was spinel structure, and Ti was incorporated into its structure. 5,6,[35][36][37][38] Maghemite 2.2. Sample Characterization.…”

Section: Methodsmentioning

confidence: 99%

“…5,6 Spinel ferrites are of great fundamental and technological importance due to their structural, electronic, magnetic, and catalytic properties. 7 An interesting feature of spinel ferrites is the possibility to replace iron cations by other metal cations while maintaining the spinel structure.…”

Section: Introductionmentioning

confidence: 99%

“…The presence of Ti 4þ in the spinel structure can improve its thermal stability. 5 It is interesting that Fe 3-x Ti x O 4 can be oxidized to nonstoichiometric Fe-Ti spinel (Fe 3-x Ti x ) 1-δ O 4 while maintaining the spinel structure. 8 The oxidation of Fe 3-xTi x O 4 can be described as ð1 -δÞFe 3 -x Ti x O 4 þ 2δO 2 f ðFe 3 -x Ti x Þ 1 -δ 0 3δ O 4 ð1Þ…”

Section: Introductionmentioning

confidence: 99%

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

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confidence: 99%

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Fe₃O₄ Anisotropic Nanostructures in Hydrogels: Efficient Catalysts for the Rapid Removal of Organic Dyes from Wastewater

Gao

Zheng

et al. 2016

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Fe3 O4 anisotropic nanostructures that exhibit excellent catalytic performance are rarely used to catalyze Fenton-like reactions because of the inevitable drawbacks resulting from traditional preparation methods. In this study, a facile, nontoxic, water-based approach is developed for directly regulating a series of anisotropic morphologies of Fe3 O4 nanostructures in a hydrogel matrix. In having the advantages of both the catalytic activity of Fe3 O4 and the adsorptive capacity of an anionic polymer network, the hybrid nanocomposites have the capability to effect the rapid removal of cationic dyes, such as methylene blue, from water samples. Perhaps more interestingly, hybrid nanocomposites loaded with Fe3 O4 nanorods exhibit the highest catalytic activity compared to those composed of nanoneedles and nanooctahedra, revealing the important role of nanostructure morphology. By means of scanning electrochemical microscopy, it is revealed that Fe3 O4 nanorods can efficiently catalyze H2 O2 decomposition and thus generate more free radicals ((.) OH, (.) HO2 ) for methylene blue degradation, which might account for their high catalytic activity.

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Metal Nanoparticles as Heterogeneous Fenton Catalysts

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The Fenton reaction (the generation of hydroxyl radicals from hydrogen peroxide) is the most useful method for degradation of organic pollutants in aqueous solution at moderate concentrations. In this Review we summarize the use of metal nanoparticles, either unsupported or deposited on large-surface-area solids, as Fenton catalysts. The Review complements two other reviews in the field of heterogeneous Fenton catalysis using aluminosilicates and carbonaceous materials. Herein, particular emphasis is given to the reaction conditions in which these catalysts are used, highlighting the operating mechanism and the relative efficiency of the materials. Aspects such as leaching of the metal to the solution, reusability, and the concentration of hydrogen peroxide used are analyzed in detail. Besides a critical description of the present status of the field, future trends and the need to establishing valid comparisons to assess the relative efficiencies of the materials are commented on.

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Decolorization of methylene blue by heterogeneous Fenton reaction using Fe3−xTixO4 (0≤x≤0.78) at neutral pH values

Cited by 179 publications

References 53 publications

Nanosized Cation-Deficient Fe−Ti Spinel: A Novel Magnetic Sorbent for Elemental Mercury Capture from Flue Gas

Nanosized Cation-Deficient Fe−Ti Spinel: A Novel Magnetic Sorbent for Elemental Mercury Capture from Flue Gas

Fe₃O₄ Anisotropic Nanostructures in Hydrogels: Efficient Catalysts for the Rapid Removal of Organic Dyes from Wastewater

Metal Nanoparticles as Heterogeneous Fenton Catalysts

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Decolorization of methylene blue by heterogeneous Fenton reaction using Fe3−xTixO4 (0≤x≤0.78) at neutral pH values

Cited by 179 publications

References 53 publications

Nanosized Cation-Deficient Fe−Ti Spinel: A Novel Magnetic Sorbent for Elemental Mercury Capture from Flue Gas

Nanosized Cation-Deficient Fe−Ti Spinel: A Novel Magnetic Sorbent for Elemental Mercury Capture from Flue Gas

Fe3O4 Anisotropic Nanostructures in Hydrogels: Efficient Catalysts for the Rapid Removal of Organic Dyes from Wastewater

Metal Nanoparticles as Heterogeneous Fenton Catalysts

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Product

Resources

About

Fe₃O₄ Anisotropic Nanostructures in Hydrogels: Efficient Catalysts for the Rapid Removal of Organic Dyes from Wastewater