Phenol Hydroxylation Using Fe/Al-MCM-41 Catalysts

Preethi, M. Esther Leena; Revathi, S.; Thiripuranthagan, Sivakumar; Manikandan, D.; Divakar, D.; Rupa, A. Valentine; Palanichami, M.

doi:10.1007/s10562-007-9249-8

Cited by 34 publications

(6 citation statements)

References 34 publications

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“…The overoxidized Pt was considered favorable for the formation of hydroquinone, whereas the partly oxidized platinum deemed favorable for the formation of catechol. Phenol hydroxylation on Fe catalysts was also reported for various supports, temperatures and phenol : H 2 O 2 mole ratios [7][8][9][10][11][12][13][14]. The highest conversion reported (60%) was obtained on Fe/MCM-41 with ∼10 wt.% Fe at 70…”

Section: Introductionmentioning

confidence: 82%

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Characterization of platinum–iron catalysts supported on MCM-41 synthesized with rice husk silica and their performance for phenol hydroxylation

Chumee

Grisdanurak

Neramittagapong

et al. 2009

Science and Technology of Advanced Materials

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Mesoporous material RH-MCM-41 was synthesized with rice husk silica by a hydrothermal method. It was used as a support for bimetallic platinum−iron catalysts Pt-Fe/RH-MCM-41 for phenol hydroxylation. The catalysts were prepared by co-impregnation with Pt and Fe at amounts of 0.5 and 5.0 wt.%, respectively. The RH-MCM-41 structure in the catalysts was studied with x-ray diffraction, and their surface areas were determined by nitrogen adsorption. The oxidation number of Fe supported on RH-MCM-41 was +3, as determined by x-ray absorption near edge structure (XANES) analysis. Transmission electron microscopy (TEM) images of all the catalysts displayed well-ordered structures, and metal nanoparticles were observed in some catalysts. All the catalysts were active for phenol hydroxylation using H 2 O 2 as the oxidant at phenol : H 2 O 2 mole ratios of 2 : 1, 2 : 2, 2 : 3 and 2 : 4. The first three ratios produced only catechol and hydroquinone, whereas the 2 : 4 ratio also produced benzoquinone. The 2 : 3 ratio gave the highest phenol conversion of 47% at 70• C. The catalyst prepared by co-impregnation with Pt and Fe was more active than that prepared using a physical mixture of Pt/RH-MCM-41 and Fe/RH-MCM-41.

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Section: Introductionmentioning

confidence: 82%

“…• C [9]. The XRD patterns of MCM-41 and Al-MCM-41 showed a decrease in intensity with a high amount of Fe added.…”

Section: Introductionmentioning

confidence: 99%

Characterization of platinum–iron catalysts supported on MCM-41 synthesized with rice husk silica and their performance for phenol hydroxylation

Chumee

Grisdanurak

Neramittagapong

et al. 2009

Science and Technology of Advanced Materials

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“…Although iron loading was found to be the same (10 wt. %) in all the synthesized catalysts higher conversion obtained over Fe/Al-MCM-41 (25) catalysts may be due to the high acidity of this catalyst 20 . The selectivity towards diphenylmethane was high over Fe/Al-MCM-41 (25) catalyst.…”

Section: Resultsmentioning

confidence: 89%

“…Diphenylmethane and its derivatives are widely used as pharmaceuticals, petrochemicals, cosmetics, dyes, fine chemicals, insulators etc 18 ., Mesoporous materials as support 19 and iron loaded mesoporous materials 20 as catalysts have proved to be highly active and efficient in our previous studies.…”

Section: Introductionmentioning

confidence: 89%

“…Fe/Al-MCM-41 (Si/Al=25), Fe/Al-MCM-41 (Si/Al=50) and Fe/Al-MCM-41 (Si/Al=100) were prepared according to the literature 16 . The synthesis procedure and characterisation of the catalyst used are discussed in detail in our previous report 20 . GC-MS analyses were performed on Shimadzu GC-MS-QP 5000 with a PE-5 capillary column; scan mode 40-400 amu.…”

Section: Generalmentioning

confidence: 99%

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Green Synthesis of Benzylated Aromatics Using Iron Loaded Mesoporous Materials

Preethi

Revathi

Thiripuranthagan

2007

Journal of Chemistry

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A New Fe(III)/MOF‐5(Ni) Catalyst for Highly Selective Synthesis of Catechol from Phenol and Hydrogen Peroxide

Xiang

et al. 2019

ChemistrySelect

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A new Fe(III)/MOF-5(Ni) catalyst with high hydrostability was prepared using an equal load method under room temperature, and nearly 100% selectivity for catechol and 63.2% yield of dihydroxybenzene were obtained in hydroxylation of phenol with H 2 O 2 over Fe(III)/MOF-5(Ni) catalyst.A new Fe(III)/MOF-5(Ni) catalyst was prepared using an equal load method under room temperature. The Fe(III)/MOF-5(Ni) was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), Brunauer À Emmett À Teller (BET) measurements, infrared spectra (IR) and X-MaxN Energy spectrum. The results showed that by adding Ni into the [Zn 4 O] metal frame of MOF-5 to partially replace Zn, the formed metal coordination group [Ni 4 O(BDC) 3 ] enhanced the hydrostability of MOF-5(Ni).The catalytic activity was evaluated for phenol hydroxylation with hydrogen peroxide (30%). Compared with 2%Fe(III)/MOF-5, the yield of dihydroxybenzene greatly increased to 63.2% from 37% and the selectivity for catechol reached near 100% over 2%Fe(III)/ MOF-5(Ni)a with the Zn 2 + :Ni 2 + molar ratio 1:1, at lower reaction temperature 80°C, reaction time 2 h and catalyst to phenol mass ratio 0.053. It proved that the loading of both Ni and Fe 3 + into MOF-5 greatly increased the catalytic activity for the hydroxylation of phenol with hydrogen peroxide, and the plausible reaction mechanism of phenol hydroxylation with H 2 O 2 over Fe(III)/MOF-5(Ni) catalyst was also proposed.

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Phenol Hydroxylation Using Fe/Al-MCM-41 Catalysts

Cited by 34 publications

References 34 publications

Characterization of platinum–iron catalysts supported on MCM-41 synthesized with rice husk silica and their performance for phenol hydroxylation

Characterization of platinum–iron catalysts supported on MCM-41 synthesized with rice husk silica and their performance for phenol hydroxylation

Green Synthesis of Benzylated Aromatics Using Iron Loaded Mesoporous Materials

A New Fe(III)/MOF‐5(Ni) Catalyst for Highly Selective Synthesis of Catechol from Phenol and Hydrogen Peroxide

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