scholarly journals Superior removal of tetracycline antibiotic using SiO2 nanoparticles biosynthesized from the extract of Nerium oleander leaves

Chemosphere ◽  
2021 ◽  
pp. 132453
Author(s):  
Noureddine El Messaoudi ◽  
Mohammed El Khomri ◽  
El-houssaine Ablouh ◽  
Amal Bouich ◽  
Abdellah Lacherai ◽  
...  
Keyword(s):  
Sio2 Nanoparticles ◽  
Nerium Oleander ◽  
Tetracycline Antibiotic

Multilayer Polymeric Nano composite Membrane for Oxygen Separation

2019 ◽  
Vol 1 (2) ◽  
pp. 1-11
Author(s):  
Gobi Nallathambi ◽  
Hazel Dhinakaran
Keyword(s):  
Polymer Concentration ◽  
Sio2 Nanoparticles ◽  
Air Separation ◽  
Regression Equations ◽  
Permeate Flux ◽  
Nano Composite ◽  
Box Behnken Design ◽  
Oxygen Selectivity ◽  
Multilayer Membrane ◽  
Spun Fiber

Air separation is a process of separating primary components from the atmospheric air. Development of membrane technologies plays a key role in air separation. Multi-layer polymeric nanocomposite membranes have been developed by a novel technique using Polyacrylonitrile (PAN) and cellulose acetate (CA) along with nano silica particles (SiO2) to obtain a higher oxygen selectivity and permeability. For the construction of the multilayer membrane, the Box-Behnken design has been used by employing three independent variables namely PAN Electro spinning time, the SiO2 percentage in the PAN polymer and CA/PEG polymer concentration. The developed membranes have been characterized for its surface morphology and physical properties. Along with the analysis of compound desirability, the results were also subject to statistical analysis in order to form regression equations. The electro spun fiber diameter increases along with the concentration of SiO2 nanoparticles and the range is from 50 nm to 400 nm. Moreover, the maximum pore size on the surface of the membrane lies between 200 to 400 nm whereas the maximum percentage of oxygen purity obtained is 48 with the permeate flux of 5.45 cm3/cm2/min.

4-Hydroxy Pyridinium Triflate@SiO2 Nanoparticles as a Novel Efficient Catalyst for Fries Rearrangement of Aryl Esters with High Selectivity

2020 ◽  
Vol 17 (8) ◽  
pp. 654-660
Author(s):  
Shermineh Sadat Ghalehbandi ◽  
Dadkhoda Ghazanfari ◽  
Sayed Ali Ahmadi ◽  
Enayatollah Sheikhhosseini
Keyword(s):  
High Selectivity ◽  
Sio2 Nanoparticles ◽  
High Yield ◽  
Synthetic Method ◽  
Functionalized Silica ◽  
Efficient Catalyst ◽  
Fries Rearrangement ◽  
Free Condition ◽  
Solvent Free Condition ◽  
Work Up

Introduction: We developed a simple, fast and new method for the Fries rearrangement of aryl esters. Materials and Methods: 4-Hydroxy pyridinium triflate functionalized silica is a very efficient, reusable and economically available catalyst for the Fries rearrangement in solvent-free condition and under microwave irradiation. Results and Discussion: Also, a notable selectivity was observed in the presence of 4-hydroxy pyridinium triflate functionalized silica. Conclusion: Selectivity, shorter reaction time, high yield, and easy work-up are advantages of this synthetic method.

Functionalized Surface-Charged SiO2 Nanoparticles Induce Pro-Inflammatory Responses, but Are Not Lethal to Caco-2 Cells

2020 ◽  
Vol 33 (5) ◽  
pp. 1226-1236 ◽  
Author(s):  
Saeko Tada-Oikawa ◽  
Mana Eguchi ◽  
Michiko Yasuda ◽  
Kiyora Izuoka ◽  
Akihiko Ikegami ◽  
...  
Keyword(s):  
Inflammatory Responses ◽  
Sio2 Nanoparticles ◽  
Functionalized Surface

scholarly journals Graphene/SiO2 nanocomposites: The enhancement of photocatalytic and biomedical activity of SiO2 nanoparticles by graphene

2017 ◽  
Vol 121 (24) ◽  
pp. 244901 ◽  
Author(s):  
Aqsa Arshad ◽  
Javed Iqbal ◽  
Qaisar Mansoor ◽  
Ishaq Ahmed
Keyword(s):  
Sio2 Nanoparticles ◽  
Sio2 Nanocomposites

Molecular Imprinting and Immobilization of Cellulase Onto Magnetic Fe3O4@SiO2 Nanoparticles

2014 ◽  
Vol 14 (4) ◽  
pp. 2931-2936 ◽  
Author(s):  
Yue Li ◽  
Xiang-Yu Wang ◽  
Rui-Zhuo Zhang ◽  
Xiao-Yun Zhang ◽  
Wei Liu ◽  
...  
Keyword(s):  
Molecular Imprinting ◽  
Sio2 Nanoparticles ◽  
Magnetic Fe3o4
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