Synthesis of Spherical Mesoporous Co-MCM-41

A serious of spherical Co-MCM-41s with different cobalt content was synthesized and characterized by XRD, SEM, N2 isotherms and ICP techniques. The influences of synthesis conditions on the structure were also studied. The use of ascorbic acid as reductant had significant influence on the morphology and the catalytic activity of Co-MCM-41. The prepared samples exhibited higher catalytic activity in the direct hydroxylation of benzene by H2O2 than those with common morphology.

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Fe-Supported SBA-16 Type Cagelike Mesoporous Silica with Enhanced Catalytic Activity for Direct Hydroxylation of Benzene to Phenol

Industrial & Engineering Chemistry Research ◽

10.1021/acs.iecr.5b04976 ◽

2016 ◽

Vol 55 (14) ◽

pp. 3900-3908 ◽

Cited By ~ 47

Author(s):

Milad Jourshabani ◽

Alireza Badiei ◽

Zahra Shariatinia ◽

Negar Lashgari ◽

Ghodsi Mohammadi Ziarani

Keyword(s):

Catalytic Activity ◽

Mesoporous Silica ◽

Hydroxylation Of Benzene ◽

Direct Hydroxylation

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Improvement on the mesostructural ordering and catalytic activity of Co-MCM-41 with ascorbic acid as auxiliary

Materials Letters ◽

10.1016/j.matlet.2013.03.015 ◽

2013 ◽

Vol 100 ◽

pp. 159-162 ◽

Cited By ~ 9

Author(s):

Bing Han ◽

Haiqing Wang ◽

Yan Kong ◽

Jun Wang

Keyword(s):

Ascorbic Acid ◽

Catalytic Activity ◽

Mcm 41

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Direct hydroxylation of benzene to phenol using H2O2 as an oxidant over vanadium-containing nitrogen doped mesoporous carbon catalysts

RSC Advances ◽

10.1039/c6ra18132e ◽

2016 ◽

Vol 6 (90) ◽

pp. 87656-87664 ◽

Cited By ~ 11

Author(s):

Liya Hu ◽

Cheng Wang ◽

Bin Yue ◽

Xueying Chen ◽

Heyong He

Keyword(s):

Catalytic Activity ◽

Mesoporous Carbon ◽

Nitrogen Doped ◽

Hydroxylation Of Benzene ◽

Highly Dispersed ◽

Carbon Catalysts ◽

Direct Hydroxylation

The integration of highly dispersed V species and NC support with superior properties endows xV/NC-y catalysts with excellent catalytic activity.

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The design and catalytic performance of molybdenum active sites on an MCM-41 framework for the aerobic oxidation of 5-hydroxymethylfurfural to 2,5-diformylfuran

Catalysis Science & Technology ◽

10.1039/c8cy02291g ◽

2019 ◽

Vol 9 (3) ◽

pp. 811-821 ◽

Cited By ~ 7

Author(s):

Zhao-Meng Wang ◽

Li-Juan Liu ◽

Bo Xiang ◽

Yue Wang ◽

Ya-Jing Lyu ◽

...

Keyword(s):

Catalytic Activity ◽

Active Sites ◽

Aerobic Oxidation ◽

Catalytic Performance ◽

Mcm 41

The catalytic activity decreases as –(SiO)3Mo(OH)(O) > –(SiO)2Mo(O)2 > –(O)4–MoO.

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Nickel (II) and oxovanadium (IV) complexes supported on MCM-41 mesoporous and their application in catalytic selective sulfide and thiol oxidation

Combinatorial Chemistry & High Throughput Screening ◽

10.2174/1386207323999201111192649 ◽

2020 ◽

Vol 23 ◽

Author(s):

Mohsen Nikoorazm ◽

Maryam Khanmoradi ◽

Masoumeh Sayadian

Keyword(s):

Catalytic Activity ◽

Room Temperature ◽

Sol Gel ◽

Reaction Times ◽

Significant Loss ◽

Spectral Studies ◽

High Catalytic Activity ◽

Catalytic Systems ◽

Solvent Free Conditions ◽

Mcm 41

Introduction:: MCM-41 was synthesized using the sol-gel method. Then two new transition metal complexes of Nickel (II) and Vanadium (IV), were synthesized by immobilization of adenine (6-aminopurine) into MCM-41 mesoporous. The compounds have been characterized by XRD, TGA, SEM, AAS and FT-IR spectral studies. Using these catalysts provided an efficient and enantioselective procedure for oxidation of sulfides to sulfoxides and oxidative coupling of thiols to their corresponding disulfides using hydrogen peroxide at room temperature. Materials and Methods:: To a solution of sulfide or thiol (1 mmol) and H2O2 (5 mmol), a determined amount of the catalyst was added. The reaction mixture was stirred at room temperature for the specific time under solvent free conditions. The progress of the reaction was monitored by TLC using n-hexane: acetone (8:2). Afterwards, the catalyst was removed from the reaction mixture by centrifugation and, then, washed with dichloromethane in order to give the pure products. Results:: All the products were obtained in excellent yields and short reaction times indicating the high activity of the synthesized catalysts. Besides, the catalysts can be recovered and reused for several runs without significant loss in their catalytic activity. Conclusion:: These catalytic systems furnish the products very quickly with excellent yields and VO-6AP-MCM-41 shows high catalytic activity compared to Ni-6AP-MCM-41.

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The Synthesis of Iron Oxides with Different Phases or Exposure Crystal Planes and their Catalytic Property for Propene Oxidation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.463-464.189 ◽

2012 ◽

Vol 463-464 ◽

pp. 189-193

Author(s):

Kong Zhai Li ◽

Masaaki Haneda ◽

Masakuni Ozawa

Keyword(s):

Catalytic Activity ◽

Iron Oxides ◽

Catalytic Property ◽

Significant Influence ◽

Catalytic Performance ◽

Selective Growth ◽

Crystal Plane ◽

Low Density ◽

Fe2o3 Nanoparticles ◽

Propene Oxidation

Maghemite (γ-FeSubscript text2OSubscript text3) and hematite (α-Fe2O3) nanoparticles with various dominant exposure crystal planes were prepared by several different methods. The structure and the reducibility of these materials were investigated by XRD, Raman and H2-TPR technologies, and their catalytic performance for propene oxidation was also discussed. The maghemite (γ-FeSubscript text2OSubscript text3) showed a better reducibility than hematite (α-FeSubscript text2OSubscript text3), but its activity for propene oxidation is relatively lower. The exposure crystal plane of hematite has a significant influence on its catalytic activity for propene oxidation. Among the prepared four samples, the hematite-1 sample showed the best activity. The selective growth of any planes with a relative low density of Fe atoms for the α-FeSubscript text2OSubscript text3 catalyst would lead to an obvious decrease in the catalytic activity.

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