High catalytic activity and selectivity for hydroxylation of benzene to phenol over multi-walled carbon nanotubes supported Fe3O4 catalyst

Song, Shaoqing; Yang, Hongxiao; Rao, R. Prasada; Liu, Huade; Zhang, Aimin

doi:10.1016/j.apcata.2010.01.008

Cited by 93 publications

(46 citation statements)

References 30 publications

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“…It is observed that the ratio of I D /I G increases with the loading of NPs in hybrid materials compared with RGO, and it slightly deceases with the addition of Fe. It may be interpreted that the different components of NPs prefer to anchor onto the defect sites rather than to the perfect sites onto the surface of RGO with the Fe loading and the defects are thus compensated (32).…”

Section: Resultsmentioning

confidence: 99%

Preparation of Monolayered Ce-Fe Oxides Dispersed on Graphene and Their Superior Adsorptive Behavior

Ling

Yang

et al. 2014

Fullerenes, Nanotubes and Carbon Nanostructures

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We present a facile synthesis of highly dispersed Ce and Fe metal oxide nanoparticles (NPs) with the size distribution of about 1-2 nm on reduced graphene oxide (RGO). The obtained Ce-Fe/RGO hybrid material is structurally characterized by TEM, XRD, XPS, Raman, BET, and H 2 -TPR. The results show that the addition of Fe promotes the formation of high surface area Ce-Fe/RGO hybrid material due to the inhibition of different species on crystal growth. The enhanced adsorption properties mainly come from the monolayer dispersion and the reduced particle size of NPs on the graphene. The driving force for the adsorption is the electrostatic action between adsorbent materials with positive electricity and CR with negative electricity, and the NPs and RGO together interact with the Congo red (CR) in the adsorption process. The Ce-Fe/RGO hybrid material exhibits a high adsorption capacity of 179.5 mg g ¡1 for the CR in water, suggesting their potential use in water treatment.

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Section: Resultsmentioning

confidence: 99%

Preparation of Monolayered Ce-Fe Oxides Dispersed on Graphene and Their Superior Adsorptive Behavior

Ling

Yang

et al. 2014

Fullerenes, Nanotubes and Carbon Nanostructures

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“…For Fe/NAC-1000, the fitting peaks of Fe 2p core-level spectra at 712.4 and 725.2 eV are assigned to Fe 2p 3/2 and Fe 2p 1/2 peaks, which is attributed to Fe 2+ in Fe 3 O 4 . 46 Compared with Fe/NAC-900, the Fe 2p 1/2 binding energy of Fe/NAC-1000 shifts to a higher value. A probable explanation is that the aggregation of Fe 2 SiO 4 at 1000°C (from XRD results) leads to the variation of electron density surrounding the central atoms.…”

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 95%

Influence of Calcination Temperatures on the Desulfurization Performance of Fe Supported Activated Carbons Treated by HNO₃

Guo

Liu²,

Luo³

et al. 2015

Ind. Eng. Chem. Res.

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Fe supported on activated carbons treated by HNO 3 (Fe/NAC) was prepared using the incipient wetness method with ultrasonic-assisted oscillation and calcined at different temperatures. The physical and chemical properties were studied using FTIR, XPS, XRD and H 2 -TPR, and SO 2 removal ability of Fe/NAC was also evaluated at a fixed bed. The results showed that α-Fe 2 O 3 and small Fe 3 O 4 coexist in Fe/NAC-500, while catalysts calcined at 700°C only possess Fe 3 O 4 . Fe 3 O 4 with small Fe 2 SiO 4 is observed for Fe/NAC-900, but Fe 2 SiO 4 and Fe 0 are detected in Fe/NAC-1000, indicating that the interactions between Fe precursor and activated carbons are very complex, and C atoms may take part in the reduction of iron oxides. The relative content of C−C and C−O decreases first and then increases when calcination temperatures increase from 500 to 1000°C, but that of CO and OCOH has a contrary trend, suggesting that calcination temperatures influence the formation of functional groups. Fe/NAC-900 shows the best activity and has a sulfur capacity of 322 mg/g, which is related closely to O COH and good crystallinity of Fe 3 O 4 . Fe 3 O 4 is the main active phase in the SO 2 removal process. After desulfurization, O COH, α-Fe 2 O 3 , Fe 3 O 4 , and Fe 0 disappear, and Fe 2 (SO 4 ) 3 is observed, leading to the decrease of SO 2 removal ability.

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“…As it can be seen, the CoFe sample presents a high and broad peak between 400-500°C with a small band between 275-400°C. The highest reduction peak can be associated to the reduction of the spinel-like Co 3 O 4 [23] and the lower band can be related to the reduction of the iron in the spinel [34]. As it occurred with the Ni-containing samples, when substituting Fe by Al (CoFeAl and CoAl samples) there is a shift of the main reduction peaks towards higher temperatures.…”

Section: Catalysts Characterizationmentioning

confidence: 97%

The oxidation of trichloroethylene over different mixed oxides derived from hydrotalcites

Blanch-Raga

Palomares

Martínez‐Triguero

et al. 2014

Applied Catalysis B: Environmental

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High catalytic activity and selectivity for hydroxylation of benzene to phenol over multi-walled carbon nanotubes supported Fe3O4 catalyst

Cited by 93 publications

References 30 publications

Preparation of Monolayered Ce-Fe Oxides Dispersed on Graphene and Their Superior Adsorptive Behavior

Preparation of Monolayered Ce-Fe Oxides Dispersed on Graphene and Their Superior Adsorptive Behavior

Influence of Calcination Temperatures on the Desulfurization Performance of Fe Supported Activated Carbons Treated by HNO₃

The oxidation of trichloroethylene over different mixed oxides derived from hydrotalcites

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High catalytic activity and selectivity for hydroxylation of benzene to phenol over multi-walled carbon nanotubes supported Fe3O4 catalyst

Cited by 93 publications

References 30 publications

Preparation of Monolayered Ce-Fe Oxides Dispersed on Graphene and Their Superior Adsorptive Behavior

Preparation of Monolayered Ce-Fe Oxides Dispersed on Graphene and Their Superior Adsorptive Behavior

Influence of Calcination Temperatures on the Desulfurization Performance of Fe Supported Activated Carbons Treated by HNO3

The oxidation of trichloroethylene over different mixed oxides derived from hydrotalcites

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Influence of Calcination Temperatures on the Desulfurization Performance of Fe Supported Activated Carbons Treated by HNO₃