Postsynthesis of Ti-UZM-35 titanosilicate as efficient catalyst for phenol hydroxylation reaction

2020 ◽  
Vol 305 ◽  
pp. 110321 ◽  
Author(s):  
Jianyong Yin ◽  
Xinqing Lu ◽  
Jiayin Yan ◽  
Fangzheng Su ◽  
Stephane Streiff ◽  
...  
Keyword(s):  
Phenol Hydroxylation ◽  
Efficient Catalyst ◽  
Hydroxylation Reaction

scholarly journals Borophosphate glass as an active media for CuO nanoparticle growth: an efficient catalyst for selenylation of oxadiazoles and application in redox reactions

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Marcos R. Scheide ◽  
Marcos M. Peterle ◽  
Sumbal Saba ◽  
José S. S. Neto ◽  
Guilherme F. Lenz ◽  
...  
Keyword(s):  
Glass Surface ◽  
Metallic Nanoparticles ◽  
Copper Oxide Nanoparticles ◽  
Phenol Hydroxylation ◽  
One Pot ◽  
Efficient Catalyst ◽  
Stabilizing Agents ◽  
Nanoparticle Growth ◽  
Air Atmosphere ◽  
Free Process

Abstract Herein, we report the preparation of CuO@ borophosphate nanoparticles (CuOnano@glass) and their wide catalytic applications. The glass annealing, under a controlled atmosphere, enables the growth of copper nanoparticles on the glass surface (not within) by an uncommon bottom-up process. Following the thermal annealing of metallic nanoparticles under air atmosphere, supported copper oxide nanoparticles CuONPs on the glass surface can be obtained. The approach enables the glass matrix to be explored as a precursor and a route for the synthesis of supported copper-based nanoparticles in a solvent-free process without immobilization steps or stabilizing agents. In order to demonstrate the wide synthetic utility of this CuONPs glass-based catalyst, one-pot three-component domino reactions were performed under an air atmosphere, affording the desired selenylated oxadiazoles in good to excellent yields. We also extended the application of these new materials as a glass-based catalyst in the phenol hydroxylation and the reduction of 4-nitrophenol.

scholarly journals A Type of MOF-Derived Porous Carbon with Low Cost as an Efficient Catalyst for Phenol Hydroxylation

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Renjie Zhou ◽  
Gui Chen ◽  
Yuejun Ouyang ◽  
Hairui Ni ◽  
Nonglin Zhou ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Porous Carbon ◽  
Physical Adsorption ◽  
Low Cost ◽  
High Specific Surface Area ◽  
Phenol Hydroxylation ◽  
Efficient Catalyst

Using MOF-5 as a template, the porous carbon (MDPC-600) possessing high specific surface area was obtained after carbonization and acid washing. After MDPC-600 was loaded with Cu ions, the catalyst Cu/MDPC-600 was acquired by heat treatment under nitrogen atmosphere. The catalyst was characterized by X-ray powder diffraction (XRD), N2 physical adsorption (BET), field emission electron microscope (SEM), energy spectrum, and transmission electron microscope (TEM). The results show that the Cu/MDPC-600 catalyst prepared by using MOF-5 as the template has a very high specific surface area, and Cu is uniformly supported on the carrier. The catalytic hydrogen peroxide oxidation reaction of phenol hydroxylation was investigated and exhibits better catalytic activity and stability in the phenol hydroxylation reaction. The catalytic effect was best when the reaction temperature was 80°C, the reaction time was 2 h, and the amount of catalyst was 0.05 g. The conversion rate of phenol was 47.6%; the yield and selectivity of catechol were 37.8% and 79.4%, respectively. The activity of the catalyst changes little after three cycles of use.

Vanadium-based polyoxometalate complex as a new and efficient catalyst for phenol hydroxylation under mild conditions

2018 ◽  
Vol 42 (7) ◽  
pp. 5142-5152 ◽  
Author(s):  
Mitu Sharma ◽  
Gangutri Saikia ◽  
Kabirun Ahmed ◽  
Sandhya Rani Gogoi ◽  
Vedavati G. Puranik ◽  
...  
Keyword(s):  
Phenol Hydroxylation ◽  
Efficient Catalyst ◽  
Mild Conditions

A polyoxovanadate complex, synthesized under mild conditions, served as the catalyst for clean conversion of phenol to catechol and hydroquinone in water.

Tin-silicalite-1: Synthesis by dry gel conversion, characterization and catalytic performance in phenol hydroxylation reaction

2009 ◽  
Vol 114 (1) ◽  
pp. 344-349 ◽  
Author(s):  
Prashant S. Niphadkar ◽  
Mehejabeen S. Kotwal ◽  
Shilpa S. Deshpande ◽  
Vijay V. Bokade ◽  
Praphulla N. Joshi
Keyword(s):  
Catalytic Performance ◽  
Phenol Hydroxylation ◽  
Dry Gel Conversion ◽  
Hydroxylation Reaction

scholarly journals CATALYTIC PERFORMANCES OF Fe2O3/TS-1 CATALYST IN PHENOL HYDROXYLATION REACTION

2010 ◽  
Vol 10 (2) ◽  
pp. 149-155 ◽  
Author(s):  
Didik Prasetyoko ◽  
Cholifah Endah Royani ◽  
Hamzah Fansuri ◽  
Zainab Ramli ◽  
Hadi Nur
Keyword(s):  
Reaction Rate ◽  
Formation Rate ◽  
Nitrogen Adsorption ◽  
Industrial Applications ◽  
Phenol Hydroxylation ◽  
Impregnation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hydroxylation Reaction ◽  
Catalytic Performances

Hydroxylation reaction of phenol into diphenol, such as hydroquinone and catechol, has a great role in many industrial applications. Phenol hydroxylation reaction can be carried out using Titanium Silicalite-1 (TS-1) as catalyst and H2O2 as an oxidant. TS-1 catalyst shows high activity and selectivity for phenol hydroxylation reaction. However, its hydrophobic sites lead to slow H2O2 adsorption toward the active site of TS-1. Consequently, the reaction rate of phenol hydroxylation reaction is tends to be low. Addition of metal oxide Fe2O3 enhanced hydrophilicity of TS-1 catalyst. Liquid phase catalytic phenol hydroxylation using hydrogen peroxide as oxidant was carried out over iron (III) oxide-modified TS-1 catalyst (Fe2O3/TS-1), that were prepared by impregnation method using iron (III) nitrate as precursor and characterized by X-ray diffraction, infrared spectroscopy, nitrogen adsorption, pyridine adsorption, and hydrophilicity techniques. Catalysts 1Fe2O3/TS-1 showed maximum catalytic activity of hydroquinone product. In this research, the increase of hydroquinone formation rate is due to the higher hydrophilicity of Fe2O3/TS-1 catalysts compare to the parent catalyst, TS-1.   Keywords: Fe2O3/TS-1, hydrophilic site, phenol hydroxylation

Influence of preparation parameters on characteristics of zirconia-pillared clay using ultrasonic technique and its catalytic performance in phenol hydroxylation reaction

2001 ◽  
Vol 18 (2) ◽  
pp. 257-262 ◽  
Author(s):  
Shobhana Vaman Awate ◽  
Suresh Babasaheb Waghmode ◽  
Kashinath Rangu Patil ◽  
Mangala Shripad Agashe ◽  
Praphulla Narahar Joshi
Keyword(s):  
Catalytic Performance ◽  
Pillared Clay ◽  
Phenol Hydroxylation ◽  
Ultrasonic Technique ◽  
Hydroxylation Reaction

Copper-modified TS-1 catalyzed hydroxylation of phenol with hydrogen peroxide as the oxidant

RSC Advances ◽  
2016 ◽  
Vol 6 (103) ◽  
pp. 101071-101078 ◽  
Author(s):  
Guoqiang Wu ◽  
Jianhui Xiao ◽  
Lei Zhang ◽  
Wenjun Wang ◽  
Yanping Hong ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Phenol Hydroxylation ◽  
Hydroxylation Of Phenol ◽  
Hydroxylation Reaction

The Cu2+ species and framework Ti of the Cu/TS-1-2 catalyst can promote the phenol hydroxylation reaction.

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