Core–shell structured magnetic mesoporous silica supported Schiff-base/Pd: an efficacious and reusable nanocatalyst

2020 ◽  
Vol 44 (8) ◽  
pp. 3445-3454 ◽  
Author(s):  
Masoumeh Shaker ◽  
Dawood Elhamifar
Keyword(s):  
Schiff Base ◽  
Mesoporous Silica ◽  
Core Shell ◽  
Ordered Mesoporous Silica ◽  
Catalytic Application ◽  
Ordered Mesoporous ◽  
Magnetic Mesoporous Silica ◽  
Mcm 41

Preparation, characterization and catalytic application of a novel magnetic ordered mesoporous silica supported Schiff-base/Pd (Fe3O4@MCM-41-SB/Pd) are developed.

scholarly journals Determination of toluene hydrogenation kinetics with neutron diffraction

2016 ◽  
Vol 18 (26) ◽  
pp. 17237-17243 ◽  
Author(s):  
Marta Falkowska ◽  
Sarayute Chansai ◽  
Haresh G. Manyar ◽  
Lynn F. Gladden ◽  
Daniel T. Bowron ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Mesoporous Silica ◽  
Ordered Mesoporous Silica ◽  
Total Neutron ◽  
Toluene Hydrogenation ◽  
Ordered Mesoporous ◽  
Hydrogenation Kinetics ◽  
Hydrogenation Of Toluene ◽  
Mcm 41

Total neutron scattering has been used to follow the hydrogenation of toluene-d8 to methylcyclohexane-d14 over 3 wt% platinum supported on highly ordered mesoporous silica (MCM-41) at 298 K and under 150–250 mbar D2 pressure.

Templated self-assembly of ordered mesoporous silica on clay nanotubes

2019 ◽  
Vol 55 (38) ◽  
pp. 5507-5510 ◽  
Author(s):  
Aleksandr Glotov ◽  
Nikolay Levshakov ◽  
Anna Stavitskaya ◽  
Maria Artemova ◽  
Pavel Gushchin ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Self Assembly ◽  
Catalytic Properties ◽  
Ordered Mesoporous Silica ◽  
Ordered Mesoporous ◽  
Clay Nanotubes ◽  
Mcm 41

Self-assembly of ordered silica arrays on clay nanotubes resulted in mesoporous MCM-41 type materials with enhanced catalytic properties.

Enhancing phosphate removal from water by using ordered mesoporous silica loaded with samarium oxide

2015 ◽  
Vol 7 (23) ◽  
pp. 10052-10060 ◽  
Author(s):  
Bingqian Han ◽  
Nan Chen ◽  
Dongyang Deng ◽  
Shaojuan Deng ◽  
Igor Djerdj ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Sol Gel ◽  
Phosphate Removal ◽  
Ordered Mesoporous Silica ◽  
Samarium Oxide ◽  
Silica Source ◽  
Ordered Mesoporous ◽  
Samarium Chloride ◽  
One Step ◽  
Mcm 41

A series of ordered mesoporous silica loaded with samarium oxide (Sm-MCM-41) were synthesized by a facile one-step sol–gel route using CTAB as the template, TEOS as the silica source, and hexahydrated samarium chloride as the precursor.

Confinement of zinc oxide nanoparticles in ordered mesoporous silica MCM-41

2012 ◽  
Vol 133 (2-3) ◽  
pp. 850-856 ◽  
Author(s):  
P.B. Lihitkar ◽  
Samuel Violet ◽  
Mandar Shirolkar ◽  
Jai Singh ◽  
O.N. Srivastava ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Mesoporous Silica ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Ordered Mesoporous Silica ◽  
Ordered Mesoporous ◽  
Mcm 41

scholarly journals Improvement in Comprehensive Properties of Poly(Methyl Methacrylate)-Based Gel Polymer Electrolyte by a Core-Shell Poly(Methyl Methacrylate)-Grafted Ordered Mesoporous Silica

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Lixin Xu ◽  
Feng Xu ◽  
Feng Chen ◽  
Jintao Yang ◽  
Mingqiang Zhong
Keyword(s):  
Ionic Conductivity ◽  
Mesoporous Silica ◽  
Methyl Methacrylate ◽  
Gel Polymer Electrolyte ◽  
Core Shell ◽  
Ordered Mesoporous Silica ◽  
Exterior Surface ◽  
Poly Methyl Methacrylate ◽  
Comprehensive Properties ◽  
Ordered Mesoporous

A novel strategy, herein, is demonstrated for improving comprehensive properties of poly (methyl methacrylate)(PMMA)-based gel polymer electrolyte (GPE) with a core-shell PMMA-grafted ordered mesoporous silica (OMS-g-PMMA). The OMS-g-PMMA was synthesized by surface-initiated atom transfer radical polymerization of methyl methacrylate from the exterior surface of OMS particle. A series of PMMA-based GPE membrances, filled with the OMS-g-PMMA of different contents, were further prepared by solution casting technique. The OMS-g-PMMA was confirmed to possess regular core-shell structure, in which a PMMA shell is chemically grafted to the exterior surface of silica core remaining intact mesoporous characteristics. Compared to the bare OMS, the OMS-g-PMMA is found to more effectively improve the comprehensive properties of PMMA-based GPE including ionic conductivity, thermal stability, and mechanical properties as well. For the PMMA-based GPE filled with 15 phr OMS-g-PMMA, the ionic conductivity at 25°C reaches 1.59 × 10−4 S⋅cm−1, which is higher by nearly two orders than that of the corresponding filler-free parent GPE. Meanwhile, the tensile strength and Young's modulus increase by 2.39 and 2.41 times, respectively, with an improvement in glass-transition temperature (Tg) about 10°C. The excellent comprehensive properties make the PMMA-based GPE filled with OMS-g-PMMA as potential candidate for electrochemical devices.

scholarly journals Ordered Mesoporous Silica Materials for Protein Adsorption

2010 ◽  
Vol 636-637 ◽  
pp. 54-59 ◽  
Author(s):  
F. Sezões ◽  
Manuela M.L. Ribeiro Carrott ◽  
Paulo A.M. Mourão ◽  
P.A. Russo ◽  
Peter J.M. Carrott
Keyword(s):  
Mesoporous Silica ◽  
Protein Adsorption ◽  
Structural Characteristics ◽  
Structural Features ◽  
Ordered Mesoporous Silica ◽  
Ordered Mesoporous ◽  
Pore Size Distributions ◽  
Silica Materials ◽  
Mesoporous Silica Materials ◽  
Mcm 41

Lysozyme and BSA were used, as model proteins of considerably different dimensions, in order to evaluate the influence of the distinct pore structural characteristics of three types of ordered mesoporous silica materials (MCF, SBA-15 and MCM-41) on protein adsorption. Characterisation by X ray diffraction and nitrogen adsorption at 77K revealed the typical pore structural features of each type of material. The maximum of the pore size distributions indicated that the width of the windows of MCF (2) (mesitylene/P123 of 2) was larger than the pore diameter of the unidirectional tubular pores of SBA-15. All the materials presented similar small external surface areas but high pore volumes, with that of MCF (2) being the highest. The adsorption of lysozyme at pH=8 increased in the order MCM-41<< SBA-15< MCF (2), and the uptakes were well above those of BSA at pH=5. Although BSA is not completely excluded from the mesopores of SBA-15 and MCF (2), as happens with MCM-41, the adsorption occurs to a very limited extent. The overall behaviour of these SBA-15 and MCF (2) samples was not significantly different and both revealed potential for the separation of these proteins.

Encapsulation of Pd Complex in Ionic Liquid on Highly Ordered Mesoporous Silica MCM-41

2007 ◽  
Vol 7 (11) ◽  
pp. 3880-3883 ◽  
Author(s):  
M. S. Sarkar ◽  
Huili Qiu ◽  
Myung-Jong Jin
Keyword(s):  
Ionic Liquid ◽  
Mesoporous Silica ◽  
Significant Loss ◽  
Palladium Acetate ◽  
High Catalytic Activity ◽  
Coupling Reactions ◽  
Ordered Mesoporous Silica ◽  
Heck Coupling ◽  
Ordered Mesoporous ◽  
Mcm 41

Palladium acetate was encapsulated onto highly ordered mesoporous silica MCM-41 with the aid of ionic liquid. The immobilized Pd complex can efficiently catalyze Heck coupling reactions of activated and non-activated aryl halides with acrylates. The Pd catalyst exhibited remarkably high catalytic activity and outstanding stability. Moreover, the immobilized palladium acetate could be recycled at least six times without significant loss of activity.

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