Reducing the particle size ofFe3O4 from the ferromagnetic regime to the superparamagnetic regime, the pore closure could be eliminated because of themore open pore as well as saving magnetic properties.
📌 3 Key Takeaways
🎯
Objective & Hypothesis:The magnetically separable mesoporous silica nanocomposites were successfully prepared through a one-pot methodincluding the co-condensation of tetraethoxysilane (TEOS) as silica precursor and 3-mercaptopropyl trimethoxysilane(MPTMS) as functionalizing agent accompanied with hydrogen peroxide for oxidation of mercapto groups and triblockcopolymers as structure directing agent in the presence of ferromagnetic and superparamagnetic Fe3O4 nanoparticles.
📊
Key Findings & Data:Byincorporating the superparamagnetic (near zero coercivity) Fe3O4 nanoparticles to the mesoporous silica (SBA-15) andfunctionalizing with sulfonic acid groups instead of ferromagnetic Fe3O4 nanoparticles, we developed versatilenanocomposite having superior properties with respect to magnetism, catalysis and porosity.
💡
Conclusion & Impact:Reducing the particle size ofFe3O4 from the ferromagnetic regime to the superparamagnetic regime, the pore closure could be eliminated because of themore open pore as well as saving magnetic properties.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters
Abstract
The magnetically separable mesoporous silica nanocomposites were successfully prepared through a one-pot methodincluding the co-condensation of tetraethoxysilane (TEOS) as silica precursor and 3-mercaptopropyl trimethoxysilane(MPTMS) as functionalizing agent accompanied with hydrogen peroxide for oxidation of mercapto groups and triblockcopolymers as structure directing agent in the presence of ferromagnetic and superparamagnetic Fe3O4 nanoparticles. Byincorporating the superparamagnetic (near zero coercivity) Fe3O4 nanoparticles to the mesoporous silica (SBA-15) andfunctionalizing with sulfonic acid groups instead of ferromagnetic Fe3O4 nanoparticles, we developed versatilenanocomposite having superior properties with respect to magnetism, catalysis and porosity. Reducing the particle size ofFe3O4 from the ferromagnetic regime to the superparamagnetic regime, the pore closure could be eliminated because of themore open pore as well as saving magnetic properties.
🔖
Cite This Article
ÖKSÜZOĞLU, R. M., ERDEM, B., ERDEM, S. (2022). MAGNETIC MESOPOROUS SILICA NANOCOMPOSITES PREPARED WITH DIFFERENT SIZED $Fe3O4:$ STRUCTURAL AND MAGNETIC PROPERTIES, CATALYTIC. Anadolu Üniversitesi Bilim ve Teknoloji Dergisi :A-Uygulamalı Bilimler ve Mühendislik, Cilt: 19 - Sayı: 2, 514–522. https://ajindex.com/articles/436292
Zhu H, Shanks BH, Heindel TJ. Enhancing CO-water mass transfer by functionalized MCM41 nanoparticles. Ind Eng Chem Res 2008; 47: 7881-7887
Rhijn WMV, De Vos DE, Sels BF, Bossaert WD, Jacobs PA. Sulfonic acid functionalised ordered mesoporous materials as catalysts for condensation and esterification reactions. Chem Commun 1998; 317-318
Polshettiwar V, Varma RS. Green chemistry by nano-catalysis. Green Chem 2010; 12: 743-754
Gill CS, Price BA, Jones CW. Sulfonic acid-functionalized silica-coated magnetic nanoparticle catalysts. J Catal 2007; 251: 145-152
Dung DTK, Hai TH, Phuc LH, Long BD, Vinh LK, Truc PN. Preparation and characterization of magnetic nanoparticles with chitosan coating. J Phys Conf Ser 2009; 187: 012036 (1-5)
Jun Y-W, Seo J-W, Cheon J. Nanoscaling laws of magnetic nanoparticles and their applicabilities in biomedical sciences. Acc Chem Res 2008; 41: 179-189
Delahaye E, Escax V, Hassan NE, Davidson A, Aquino R, Dupuis V, Perzynski R, Raikher YL. “Nanocasting”: Using SBA-15 silicas as hard templates to obtain ultrasmall monodispersed γ-Fe2O3 nanoparticles. J Phys Chem B 2006; 110: 26001- 26011
Castanheiro JE, Fonseca IM, Ramos AM, Vital J. Tungstophosphoric acid immobilised in SBA- 15 as an efficient heterogeneous acid catalyst for the conversion of terpenes and free fatty acids. Micro Meso Mater 2017; 249: 16-24
Lai D-m, Deng L, Li J, Liao B, Guo Q-x, Fu Y. Hydrolysis of cellulose into glucose by magnetic solid acid. ChemSusChem 2011; 4: 55-58
Erdem S, Öksüzoğlu RM, Avşar SB, Erdem B. Magnetic mesoporous silica nanocomposite for biodiesel production. Acta Phys Pol A 2017; 132: 763-766
Kassaee MZ, Masrouri H, Movahedi F. Sulfamic acid-functionalized magnetic Fe3O4 nanoparticles as an efficient and reusable catalyst for one-pot synthesis of α-amino nitriles in water. Appl Catal A: Gen 2011; 395: 28-33
Lai D-m, Deng L, Guo Q-x, Fu Y. Hydrolysis of biomass by magnetic solid acid. Energy & Environ Sci 2011; 4: 3552-3557
Souza KC, Salazar-Alvarez G, Ardisson JD, Macedo WAA, Sousa EMB. Mesoporous silicamagnetite nanocomposite synthesized by using a neutral surfactant. Nanotechnology 2008; 19: 185603 (1-7)
Caizer C, Savii C, Popovici M. Magnetic behaviour of iron oxide nanoparticles dispersed in a silica matrix. Mater Sci Eng B 2003; B97: 129-134
Mu B, Wang T, Wu Z, Shi H, Xue D, Liu P. Fabrication of functional block copolymer grafted superparamagnetic nanoparticles fo