Preparation of ZrO2/Al2O3-montmorillonite composite as catalyst for phenol hydroxylation

Fatimah, Is

doi:10.1016/j.jare.2013.10.003

Cited by 22 publications

(8 citation statements)

References 26 publications

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“…However, there is little report on improving catechol selectivity alone. The modified zeolite, composite metal oxide, organic metal complex and molecular sieve catalysts are used in the catalytic hydroxylation of phenol . However, only 60% of phenol conversion and 85% of catechol selectivity were obtained over these catalysts .…”

Section: Introductionmentioning

confidence: 99%

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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Section: Introductionmentioning

confidence: 99%

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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“…It has been revealed that the loading of the ZrO 2 nanoparticles onto porous material like Al 2 O 3 (activated alumina, a lower cost commercial support with large surface area) is an effective method to increase the photocatalystic activity and chemical stability even at low pHs . Several methods have been applied for synthesis of Al 2 O 3 /ZrO 2 composites, such as solvothermal method, hydrothermal method, combustion, and sol–gel method . Among them, sol‐gel method is of great interest for preparing nanoparticles, due to its the low‐temperature process, environmental friendly and economic feasibility…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Al₂O₃/ZrO₂ Nanocomposite and the Study of Its effects on Photocatalytic Degradation of Reactive Blue 222 and Reactive Yellow 145 Dyes

2020

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Al2O3/ZrO2 nanocomposites were synthesized by growth of semiconductor ZrO2 onto Al2O3 nanoparticles by a facile sol‐gel method using tragacanth gum as a natural gel. Ultrasonic technique was applied for the coating of ZrO2 onto Al2O3 during the production process of nanostructures. XRD data confirmed the formation of Al2O3/ZrO2 nanocomposites. The synthesized Al2O3/ZrO2 was evaluated for photocatalytic activity through degradation of Reactive Blue 222(RB222) and Reactive Yellow 145(RY145) dyes in aqueous solution under visible irradiation. Influence of some parameters such as initial dye concentration, catalyst loading and irradiation duration on the degradation of dyes was investigated as well as the optimum conditions were obtained. The results showed that the removal efficiency of a 20 mg/L (50 mL) dye solution reached 91.4 % for RB222 and 94.6 % for RY145 only in 60 min of reaction duration with 0.04 g of Al2O3/ZrO2 as catalyst. The dyes degradation was monitored by using UV‐Vis spectroscopy.

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“…us, it is very important to select a suitable catalyst for phenol hydroxylation. e catalysts for phenol hydroxylation include modified molecular sieves, composite metal oxides, organic metal complexes, etc [7][8][9]. It has been reported that the phenol conversion of these catalysts for phenol hydroxylation was usually between 40% and 60%, and the catechol selectivity was seldom more than 75% [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Fe(II)/MOF-5 Catalyst for Highly Selective Catalytic Hydroxylation of Phenol by Equivalent Loading at Room Temperature

Xiang

et al. 2019

Journal of Chemistry

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The metal-organic framework MOF-5 was synthesized by self-assembling of Zn(NO3)2·7H2O and H2BDC using DMF as solvent by the direct precipitation method and loaded with Fe2+ by the equivalent loading method at room temperature to prepare Fe(II)/MOF-5 catalyst and the microstructure, phases, and pore size of which was characterized by IR, XRD, SEM, TEM, and BET. It was found that Fe(II)/MOF-5 had high specific surface and porosity like MOF-5 and uniform pore distribution, and the pore size is 1.2 nm. In order to study the catalytic activity and reaction conditions of Fe(II)/MOF-5, it was used to catalyze the hydroxylation reaction of phenol with hydrogen peroxide. The results showed that the dihydroxybenzene yield of 53.2% and the catechol selectivity of 98.6% were obtained at the Fe2+ content of 3 wt.%, the mass ratio of Fe(II)/MOF-5 to phenol of 0.053, the reaction temperature of 80°C, and the reaction time of 2 h.

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Preparation of ZrO2/Al2O3-montmorillonite composite as catalyst for phenol hydroxylation

Cited by 22 publications

References 26 publications

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

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

Synthesis of Al₂O₃/ZrO₂ Nanocomposite and the Study of Its effects on Photocatalytic Degradation of Reactive Blue 222 and Reactive Yellow 145 Dyes

Preparation of Fe(II)/MOF-5 Catalyst for Highly Selective Catalytic Hydroxylation of Phenol by Equivalent Loading at Room Temperature

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Preparation of ZrO2/Al2O3-montmorillonite composite as catalyst for phenol hydroxylation

Cited by 22 publications

References 26 publications

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

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

Synthesis of Al2O3/ZrO2 Nanocomposite and the Study of Its effects on Photocatalytic Degradation of Reactive Blue 222 and Reactive Yellow 145 Dyes

Preparation of Fe(II)/MOF-5 Catalyst for Highly Selective Catalytic Hydroxylation of Phenol by Equivalent Loading at Room Temperature

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Synthesis of Al₂O₃/ZrO₂ Nanocomposite and the Study of Its effects on Photocatalytic Degradation of Reactive Blue 222 and Reactive Yellow 145 Dyes