scholarly journals Mesoporous Silica with Covalently Immobilized Anthracene as Adsorbent for SPE Recovery of PAHs Pollutants from Highly Lipidic Solutions

2020 ◽  
Author(s):  
Albina Mikhraliieva ◽  
Rodrigo Araújo Gonçalves ◽  
Volodymyr Zaitsev
Keyword(s):  
Mesoporous Silica ◽  
Vegetable Oil ◽  
Myristic Acid ◽  
Polar Solvent ◽  
Dynamic Adsorption ◽  
Functionalized Mesoporous Silica ◽  
High Lipid ◽  
Two Samples ◽  
One Step ◽  
Π Stacking Interaction

Two samples of functionalized mesoporous silica containing anchored anthrylmethylamine groups (SiO<sub>2</sub>-Ant) have been prepared by surface assembling (1) and one step silane immobilization (2). Both adsorbents can be attributed to bimodal balanced hydrophobic-hydrophilic adsorbents with loading of anthracene groups about 15-33%. The adsorbents have been used for SPE of anthracene from organic solvents (acetonitrile, acetone and heptane) and model solutions of lipids (myristic acid and vegetable oil). The obtained results were compared with commercial C18 SPE cartridge. While C18 cartridge recovers anthracene from water-containing media (acetonitrile/water, 1/1), SiO<sub>2</sub>-Ant cartridges much more efficient in extraction of anthracene from non-polar solvent (heptane). Lipids macrocomponents such as myristic acid and vegetable oil do not decrease the dynamic adsorption capacity and recovery of the model PAH on SiO<sub>2</sub>-Ant. It was demonstrated that π-π stacking interaction with the analyte determine the selectivity of SiO<sub>2</sub>-Ant towards of anthracene. This makes SiO<sub>2</sub>-Ant attractive for selective pre-concentration of PAHs from high lipid content objects, such as vegetable oils.

scholarly journals Mesoporous Silica with Covalently Immobilized Anthracene as Adsorbent for SPE Recovery of PAHs Pollutants from Highly Lipidic Solutions

2020 ◽  
Author(s):  
Albina Mikhraliieva ◽  
Rodrigo Araújo Gonçalves ◽  
Volodymyr Zaitsev
Keyword(s):  
Mesoporous Silica ◽  
Vegetable Oil ◽  
Myristic Acid ◽  
Polar Solvent ◽  
Dynamic Adsorption ◽  
Functionalized Mesoporous Silica ◽  
High Lipid ◽  
Two Samples ◽  
One Step ◽  
Π Stacking Interaction

Two samples of functionalized mesoporous silica containing anchored anthrylmethylamine groups (SiO<sub>2</sub>-Ant) have been prepared by surface assembling (1) and one step silane immobilization (2). Both adsorbents can be attributed to bimodal balanced hydrophobic-hydrophilic adsorbents with loading of anthracene groups about 15-33%. The adsorbents have been used for SPE of anthracene from organic solvents (acetonitrile, acetone and heptane) and model solutions of lipids (myristic acid and vegetable oil). The obtained results were compared with commercial C18 SPE cartridge. While C18 cartridge recovers anthracene from water-containing media (acetonitrile/water, 1/1), SiO<sub>2</sub>-Ant cartridges much more efficient in extraction of anthracene from non-polar solvent (heptane). Lipids macrocomponents such as myristic acid and vegetable oil do not decrease the dynamic adsorption capacity and recovery of the model PAH on SiO<sub>2</sub>-Ant. It was demonstrated that π-π stacking interaction with the analyte determine the selectivity of SiO<sub>2</sub>-Ant towards of anthracene. This makes SiO<sub>2</sub>-Ant attractive for selective pre-concentration of PAHs from high lipid content objects, such as vegetable oils.

scholarly journals Mesoporous Silica With Covalently Immobilized Anthracene As Adsorbent For SPE Recovery Of PAHs Pollutants From Highly Lipidic Solutions

2021 ◽  
Vol 16 (1) ◽  
pp. 5-14
Author(s):  
Albina Mikhraliieva ◽  
Rodrigo A. Gonзalves ◽  
Vladimir Zaitsev
Keyword(s):  
Mesoporous Silica ◽  
Vegetable Oil ◽  
Myristic Acid ◽  
Solid Phase ◽  
Functionalized Mesoporous Silica ◽  
High Lipid ◽  
Two Samples ◽  
Polycyclic Aromatic ◽  
One Step ◽  
Π Stacking Interaction

Two samples of functionalized mesoporous silica containing anchored anthrylmethylamine groups (SiO2-Ant) have been prepared by surface assembling (1) and one step silane immobilization (2). Both adsorbents can be attributed to bimodal balanced hydrophobic-hydrophilic adsorbents with loading of anthracene groups about 15-33 %. The adsorbents have been used for solid-phase extraction (SPE) of anthracene from organic solvents (acetonitrile, acetone and heptane) and model solutions of lipids (myristic acid and vegetable oil). The obtained results were compared with commercial C18 SPE cartridge. While C18 cartridge recovers anthracene from water-containing media (acetonitrile/water, 1/1), SiO2-Ant cartridges much more efficient in extraction of anthracene from non-polar solvent (heptane). Lipids macrocomponents such as myristic acid and vegetable oil do not decrease the dynamic adsorption capacity and recovery of the model polycyclic aromatic hydrocarbon (PAH) on SiO2-Ant. It was demonstrated that π-π stacking interaction with the analyte determine the selectivity of SiO2-Ant towards of anthracene. This makes SiO2-Ant attractive for selective preconcentration of PAHs from high lipid content objects, such as vegetable oils.

scholarly journals Synthesis, Characterization and Textural Analysis of Functionalized Mesoporous Silica Using Sodium Silicate as Precursor and Silicone Surfactant as Template

2014 ◽  
Vol 11 (2) ◽  
pp. 419-428
Author(s):  
Baghdad Science Journal
Keyword(s):  
Mesoporous Silica ◽  
Sodium Silicate ◽  
Nitrogen Adsorption ◽  
Average Diameter ◽  
Functionalized Silica ◽  
Average Pore ◽  
Force Microscopy ◽  
Functionalized Mesoporous Silica ◽  
One Step ◽  
Adsorption Desorption

Three mesoporous silica with different functional group were prepared by one-step synthesis based on the simultaneous hydrolysis and condensation of sodium silicate with organo - silane in the presence of template surfactant polydimethylsiloxane - polyethyleneoxide (PDMS - PEO). The prepared materials were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), atomic force microscopy (AFM) and nitrogen adsorption/desorption experiments. The results indicate that the preparation of methyl and phenyl functionalized silica were successful and the mass of methyl and phenyl groups bonded to the silica structure are 15, 38 mmol per gram silica. The average diameter of the silica particles are 103.51, 167.25 , and 86.41 nm while the average pore diameter are 6.7, 16.4, and 2.7 nm for unfunctionalized, methyl, and phenyl functionalized silica respectively.

Synthesis of dithiocarbamate-functionalized mesoporous silica-based materials: interest of one-step grafting

2009 ◽  
Vol 33 (3) ◽  
pp. 528-537 ◽  
Author(s):  
Stéphanie Goubert-Renaudin ◽  
Fabrice Gaslain ◽  
Claire Marichal ◽  
Bénédicte Lebeau ◽  
Raphaël Schneider ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Functionalized Mesoporous Silica ◽  
One Step

Molecular design of the amphiphilic AB diblock copolymer toward one-step synthesis of amino-group functionalized large pore mesoporous silica

RSC Advances ◽  
2014 ◽  
Vol 4 (81) ◽  
pp. 43047-43051 ◽  
Author(s):  
Dongpo Xu ◽  
Yuan Yao ◽  
Lu Han ◽  
Shunai Che
Keyword(s):  
Acrylic Acid ◽  
Mesoporous Silica ◽  
Pore Size ◽  
Diblock Copolymer ◽  
Molecular Design ◽  
Amino Group ◽  
Structure Directing Agent ◽  
Functionalized Mesoporous Silica ◽  
One Step ◽  
Loading Amount

A functionalized mesoporous silica with an amino group loading amount of 3.1 mmol g−1 and a pore size of 27.5 nm was achieved by the co-structure directing agent (CSDA) method using poly(styrene)-b-poly(acrylic acid) (PS-b-PAA) as the template.

scholarly journals Preparation of functionalized mesoporous silica as a novel carrier and immobilization of laccase

2021 ◽  
Author(s):  
Bo Yang ◽  
Kun Tang ◽  
Shuwei Wei ◽  
Xuejun Zhai ◽  
Nanzhu Nie
Keyword(s):  
Mesoporous Silica ◽  
Immobilized Enzyme ◽  
Nitrogen Adsorption ◽  
Mesoporous Structure ◽  
Optimal Conditions ◽  
Step Method ◽  
Immobilized Laccase ◽  
Functionalized Mesoporous Silica ◽  
One Step ◽  
Laccase Immobilization

Abstract Amino modified mesoporous silica (SBA-15-NH2) was prepared by hydrothermal method, which is a kind of excellent carrier for enzyme immobilization. The structure of SBA-15 was characterized by SEM and FTIR, which proved that amino group was successfully attached to the surface of SBA-15. The carrier had good mesoporous structure by nitrogen adsorption and desorption test. Using SBA-15-NH2 as the carrier, the optimal conditions of laccase immobilization by two different cross-linking methods were explored. At the same time, the properties of immobilized enzyme and free enzyme were compared. The results showed that the activity of immobilized laccase by two-step method (2977.5 U/g) was much higher than that by one-step method (239.5 U/g). The optimal conditions were as follows: free laccase (35℃, pH = 4.5), two-step immobilized laccase (40℃, pH = 4.0), one-step immobilized laccase (35℃, pH = 4.0). The two-step method was more adaptable to temperature. The pH adaptation range of immobilized enzyme was wider, and the thermal stability was greatly enhanced. After five cycles of repeated reaction, the residual enzyme activity of two-step and one-step methods were 56% and 43% of the original. The treatment of simulated wastewater containing 2,4-dichlorophenol (2,4-DCP) by immobilized laccase was also studied. Under the optimum conditions (40℃, pH = 5.0, 20 mg/L), the removal of 2,4-DCP can reach 89.06%.

The Synthesis and Application of Functionalized Mesoporous Silica SBA-15 as Heterogeneous Catalyst in Organic Synthesis

2020 ◽  
Vol 24 ◽  
Author(s):  
Ghodsi Mohammadi Ziarani ◽  
Shima Roshankar ◽  
Fatemeh Mohajer ◽  
Alireza Badiei
Keyword(s):  
Mesoporous Silica ◽  
Heterogeneous Catalyst ◽  
Organic Synthesis ◽  
Lewis Acid ◽  
Heterogeneous Catalysts ◽  
Organic Transformations ◽  
Functionalized Mesoporous Silica ◽  
Silica Nanomaterials ◽  
Wide Range ◽  
Target Molecules

Abstract:: Mesoporous silica nanomaterials provide an extraordinary advantage for making new and superior heterogeneous catalysts because of their surface silanol groups. The functionalized mesoporous SBA-15, such as acidic, basic, BrÖnsted, lewis acid, and chiral catalysts, are used for a wide range of organic synthesis. The importance of the chiral ligands, which were immobilized on the SBA-15, was mentioned in this review to achieve chiral products as valuable target molecules. Herein, their synthesis and application in different organic transformations are reviewed from 2016 till date 2020.

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