Ordered Mesoporous Silica with Large Cage-Like Pores:  Structural Identification and Pore Connectivity Design by Controlling the Synthesis Temperature and Time

2003 ◽  
Vol 125 (3) ◽  
pp. 821-829 ◽  
Author(s):  
Jivaldo R. Matos ◽  
Michal Kruk ◽  
Lucildes P. Mercuri ◽  
Mietek Jaroniec ◽  
Lan Zhao ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Structural Identification ◽  
Synthesis Temperature ◽  
Ordered Mesoporous Silica ◽  
Large Cage ◽  
Pore Connectivity ◽  
Ordered Mesoporous

scholarly journals Deformation of Ordered Mesoporous Silica Structures on Exposure to High Temperatures

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
John B. Lowe ◽  
Richard T. Baker
Keyword(s):  
Mesoporous Silica ◽  
Pore Structure ◽  
High Temperatures ◽  
Elevated Temperatures ◽  
Ordered Mesoporous Silica ◽  
Large Cage ◽  
Pore Structures ◽  
Ordered Mesoporous ◽  
Pore Size Distributions ◽  
Wide Range

Ordered mesoporous silica materials are of interest for a wide range of applications. In many of these, elevated temperatures are used either in the preparation of the material or during its use. Therefore, an understanding of the effect of high temperature treatments on these materials is desirable. In this work, a detailed structural study is performed on silicas with three representative pore structures: a 2-D hexagonal pore arrangement (SBA-15), a continuous 3D cubic bimodal pore structure (KIT-6), and a 3D large cage pore structure (FDU-12). Each silica is studied as prepared and after treatment at a series of temperatures between 300 and 900°C. Pore structures are imaged using Transmission Electron Microscopy. This technique is used in conjunction with Small-Angle X-ray Diffraction, gas physisorption, and29Si solid state Nuclear Magnetic Resonance. Using these techniques, the pore size distributions, the unit cell dimensions of the mesoporous structures, and the relative occupancy of the distinct chemical environments of Si within them are cross correlated for the three silicas and their evolution with treatment temperature is elucidated. The physical and chemical properties before, during, and after collapse of these structures at high temperatures are described as are the differences in behavior between the three silica structures.

Direct manipulation of particle size and morphology of ordered mesoporous silica by flow synthesis

RSC Advances ◽  
2015 ◽  
Vol 5 (18) ◽  
pp. 13331-13340 ◽  
Author(s):  
T. N. Ng ◽  
X. Q. Chen ◽  
K. L. Yeung
Keyword(s):  
Particle Size ◽  
Mesoporous Silica ◽  
Hollow Spheres ◽  
Ordered Mesoporous Silica ◽  
Direct Manipulation ◽  
Flow Synthesis ◽  
Precise Control ◽  
Ordered Mesoporous ◽  
Particle Size And Morphology ◽  
Size And Morphology

Flow-synthesis of mesoporous silica allows deliberate and precise control over the size and shapes and enables the preparation of complex microstructures (i.e., hollow spheres).

scholarly journals SPION-decorated organofunctionalized MCM48 silica-based nanocomposites for magnetic solid-phase extraction

2021 ◽  
Vol 2 (3) ◽  
pp. 963-973
Author(s):  
Daniel Garcia-Osorio ◽  
Helton P. Nogueira ◽  
Josué M. Gonçalves ◽  
Sergio H. Toma ◽  
Sergio Garcia-Segura ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Critical Micellar Concentration ◽  
Phase Extraction ◽  
Ordered Mesoporous Silica ◽  
Ordered Mesoporous ◽  
Magnetic Solid ◽  
Magnetic Recovery

(a) Cubic structures formed by CTAB above critical micellar concentration used as a template to generate highly ordered mesoporous silica. (b) Photo showing the magnetic recovery of MCM48/SPION/C8 nanocomposite in 60 s.

Synthesis and characterization of dicationic 4,4′-bipyridinium dichloride ordered mesoporous silica nanocomposite and its application in the preparation of 1H-pyrazolo[1,2-b]phthalazine-5,10-dione derivatives

RSC Advances ◽  
2015 ◽  
Vol 5 (33) ◽  
pp. 25816-25823 ◽  
Author(s):  
Aigin Bashti ◽  
Ali Reza Kiasat ◽  
Babak Mokhtari
Keyword(s):  
Mesoporous Silica ◽  
Synthesis And Characterization ◽  
Ordered Mesoporous Silica ◽  
One Pot ◽  
Ordered Mesoporous ◽  
Environmentally Safe ◽  
P Application ◽  
The One ◽  
Solvent Free Synthesis

Application of SBA@BiPy2+ 2Cl− nanocomposite as a novel environmentally safe heterogeneous nanoreactor for the one-pot solvent-free synthesis of 1H-pyrazolo[1,2-b]phthalazine-5,10-dione derivatives.

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