The effects of surface chemistry of mesoporous silica materials and solution pH on kinetics of molsidomine adsorption

2014 ◽  
Vol 209 ◽  
pp. 105-112 ◽  
Author(s):  
E.S. Dolinina ◽  
E.V. Parfenyuk
Keyword(s):  
Mesoporous Silica ◽  
Surface Chemistry ◽  
Solution Ph ◽  
Silica Materials ◽  
Mesoporous Silica Materials ◽  
Kinetics Of

scholarly journals EFFECT OF pH ON ADSORPTION KINETICS OF ANTICOAGULANT WARFARIN ON MESOPOROUS SILICA MATERIALS

2018 ◽  
Vol 59 (6) ◽  
pp. 58
Author(s):  
Elena V. Parfenyuk ◽  
Ekaterina S. Dolinina ◽  
Mariya I. Vlasenkova
Keyword(s):  
Mesoporous Silica ◽  
Sol Gel ◽  
Porous Silica ◽  
Structural Diversity ◽  
Surface Heterogeneity ◽  
Second Order ◽  
Silica Materials ◽  
Pseudo Second Order ◽  
Mesoporous Silica Materials ◽  
Kinetics Of

Synthesis and study of drug composites based on porous silica is promising area for development of new drug formulations with improved pharmacological and consumer properties. Adsorption is one of easiest and fruitful preparation method of drug composites with porous materials. To develop conditions of preparation of novel silica composites with anticoagulant warfarin by adsorption, the influence of medium pH on kinetics of warfarin adsorption on mesoporous silica materials with different  surface chemistry was studied. For this purpose unmodified mesoporous silica was synthesized by sol-gel method. The phenyl and mercaptopropyl modified silica materials were prepared by grafting. The results of kinetic study showed that the warfarin adsorption predominantly follows the pseudo-second-order kinetics. The rate constants of the pseudo-second-order (k2) were found to be dependent on pH and presence of the organic surface groups. The effects were explained by pH-dependent structural diversity of the drug and surface charge of the silica adsorbents as well as their surface heterogeneity. It was established that film diffusion is the rate-controlling step of the adsorption.

scholarly journals Mechanisms and Intermediates in the True Liquid Crystal Templating Synthesis of Mesoporous Silica Materials

2021 ◽  
Vol 125 (12) ◽  
pp. 3197-3207
Author(s):  
Johanna R. Bruckner ◽  
Jessica Bauhof ◽  
Jacqueline Gebhardt ◽  
Ann-Katrin Beurer ◽  
Yvonne Traa ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Mesoporous Silica ◽  
Silica Materials ◽  
Mesoporous Silica Materials ◽  
Liquid Crystal Templating ◽  
Templating Synthesis

Fl–DFO molecules@mesoporous silica materials: Highly sensitive and selective nanosensor for dosing with iron ions

2011 ◽  
Vol 358 (1) ◽  
pp. 136-145 ◽  
Author(s):  
Bao-Lian Su ◽  
Nicolas Moniotte ◽  
Noan Nivarlet ◽  
Li-Hua Chen ◽  
Zheng-Yi Fu ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Iron Ions ◽  
Highly Sensitive ◽  
Silica Materials ◽  
Mesoporous Silica Materials

Monolithic Macroporous-Mesoporous Carbon Using Ionic Liquids as Carbon Source

2014 ◽  
Vol 988 ◽  
pp. 23-26
Author(s):  
Ai Bing Chen ◽  
Yun Hong Yu ◽  
Yi Feng Yu ◽  
Hai Jun Lv ◽  
Ting Ting Xing ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Carbon Source ◽  
Mesoporous Silica ◽  
Mesoporous Carbon ◽  
Structure Directing Agent ◽  
Silica Source ◽  
Pu Foam ◽  
Silica Materials ◽  
Mesoporous Silica Materials ◽  
Ordered Macroporous

A facile approach is employed for the preparation of hierarchically porous structures monolithic ordered macroporous-mesoporous silica materials (OMS) using the commercially available and cheap polyurethane (PU) foam as monolithic template, triblock copolymer P123 (EO20PO70EO20) as structure-directing agent and tetraethyl orthosilicate (TEOS) as silica source, then monolithic ordered macro porous-mesoporous carbon materials (OMC) is synthesized by using monolithic ordered macroporous-mesoporous silica materials as hard template and ionic liquids as the carbon source. The silica and carbon monoliths possess uniform pore sizes (3.74-3.84 nm) and ordered mesostructure.

scholarly journals Synthesis of Gold Catalysts Supported on Mesoporous Silica Materials: Recent Developments

Catalysts ◽  
2011 ◽  
Vol 1 (1) ◽  
pp. 97-154 ◽  
Author(s):  
Luis-Felipe Gutiérrez ◽  
Safia Hamoudi ◽  
Khaled Belkacemi
Keyword(s):  
Mesoporous Silica ◽  
Gold Catalysts ◽  
Silica Materials ◽  
Recent Developments ◽  
Mesoporous Silica Materials
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