scholarly journals Immobilization of Bacillus licheniformis using Fe3O4@SiO2 nanoparticles for the development of bacterial bioreactor

2019 ◽  
Vol 35 (2) ◽  
pp. 854-862
Author(s):  
Ayoub Nadi ◽  
Marouane Melloul ◽  
Aicha Boukhriss ◽  
Elmostafa El-Fahime ◽  
Damien Boyer ◽  
...  
Keyword(s):  
Bacillus Licheniformis ◽  
Fe3o4 Nanoparticles ◽  
Sol Gel ◽  
Sio2 Nanoparticles ◽  
Industrial Applications ◽  
Basic Medium ◽  
Magnetite Fe3o4 ◽  
Sol Gel Process ◽  
Co Precipitation

In the biotechnology field, nanoparticles with a strong magnetic moment can bring attractive and novel potentialities. They are detectable, manipulable, stimulable by a magnetic field and they could be applied as nano-tracers for medical imaging and nano-vectors for transporting therapeutic agents to a target. For our part, we applied Fe3O4 nanoparticles to immobilize bacteria of Moroccan strains in order to develop bacterial bioreactor. For this aim, we got through the synthesis and characterization of magnetite Fe3O4 nanoparticles by co-precipitation in basic medium. The obtained nanoparticles were encapsulated in silica by sol-gel process. The results of this step allowed us to use Fe3O4@SiO2 nanoparticles to immobilize Bacillus licheniformis by adsorption and separate it magnetically. The principle of this system gives us the opportunity to develop a bacterial bioreactor for industrial applications.

scholarly journals Preparation and characterization of superparamagnetic magnetite (Fe3O4) nanoparticles: A short review

2019 ◽  
Vol 15 (1) ◽  
pp. 23-31 ◽  
Author(s):  
Khong Nee Koo ◽  
Ahmad Fauzi Ismail ◽  
Mohd Hafiz Dzarfan Othman ◽  
Noriah Bidin ◽  
Mukhlis A Rahman
Keyword(s):  
Fe3o4 Nanoparticles ◽  
Environmental Remediation ◽  
High Surface ◽  
Sol Gel ◽  
Magnetic Domain ◽  
Volume Ratio ◽  
Future Perspective ◽  
Practical Applications ◽  
Magnetite Fe3o4

Magnetic magnetite (Fe3O4) nanoparticles have attracted a great deal of attention in both fundamental research and practical applications over the past decades. Down to the nanoscale, superparamagnetic Fe3O4 nanoparticles with only a single magnetic domain exhibit high magnetic susceptibility, which provides a stronger and faster magnetic response. Their superparamagnetic properties together with other intrinsic properties such as low toxicity, high surface area-to-volume ratio and simple separation methodology, making them ideal for environmental remediation, biomedical, and agricultural applications. This review discusses three conventional wet chemical methods, including chemical co-precipitation, sol-gel synthesis and thermal decomposition for the preparation of superparamagnetic Fe3O4 nanoparticles with controlled size and magnetic properties. Nowadays, with the growing research interest in Fe3O4 nanoparticles, there is a great amount of researches reported on efficient routes to prepare size-controlled magnetic nanoparticles. Thus, this review is designed to report the recent information from synthesis to the characterization of Fe3O4 nanoparticles as well as the discussion of future perspective in this research area.

Studies on Adsorption Performance of Reactive Dye Remazol Navy RGB (RN-RGB) via Epoxide Functional Magnetic ?-Al2O3 Nanocomposite Particles

2017 ◽  
Vol 9 (4) ◽  
pp. 421-429
Author(s):  
S. S. Bristy ◽  
H. Ahmad
Keyword(s):  
Sol Gel ◽  
Reactive Dye ◽  
Al2o3 Nanoparticles ◽  
Silica Layer ◽  
Seeded Polymerization ◽  
Nanocomposite Particles ◽  
Adsorption Performance ◽  
Magnetite Fe3o4 ◽  
Co Precipitation

The nanocomposite particles named as ?-Al2O3/Fe3O4/SiO2/poly(glycidyl methacrylate) or ?-Al2O3/Fe3O4/SiO2/PGMA were prepared by multi-step process. At first, ?- Al2O3 nanoparticles were prepared by sol-gel method. Magnetite, Fe3O4, nanoparticles were then precipitated by in situ co-precipitation in presence of ?-Al2O3 particles, followed by incorporation of mesoporous silica layer using Stöber process. Finally, the surface of the ?-Al2O3/Fe3O4/SiO2 nanocomposite particles was modified by seeded polymerization of GMA using free radical polymerization. The surface modification, morphology and size distribution of the prepared nanocomposite particles were confirmed by FTIR, scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The adsorption capacity of ?-Al2O3/Fe3O4/SiO2/PGMA nanocomposite particles was evaluated using remazol navy RGB (RN-RGB) as a model dye.

The preparation and characterization of transparent nano-sized thermochromic VO2–SiO2 films from the sol–gel process

2004 ◽  
Vol 347 (1-3) ◽  
pp. 138-143 ◽  
Author(s):  
Hua-Kuo Chen ◽  
Hsin-Chin Hung ◽  
Thomas C.-K. Yang ◽  
Sea-Fue Wang
Keyword(s):  
Sol Gel ◽  
Sio2 Films ◽  
Sol Gel Process

ChemInform Abstract: Preparation and Characterization of Machinable Mica Glass-Ceramics by the Sol-Gel Process.

ChemInform ◽  
1989 ◽  
Vol 20 (9) ◽  
Author(s):  
T. HAMASAKI ◽  
K. EGUCHI ◽  
Y. KOYANAGI ◽  
A. MATSUMOTO ◽  
T. UTSUNOMIYA ◽  
...  
Keyword(s):  
Sol Gel ◽  
Glass Ceramics ◽  
Sol Gel Process

Synthesis and characterization of well-defined star polymers via a controlled sol-gel process

1991 ◽  
Vol 24 (6) ◽  
pp. 1431-1434 ◽  
Author(s):  
Timothy E. Long ◽  
Larry W. Kelts ◽  
S. Richard Turner ◽  
Jeffrey A. Wesson ◽  
Thomas H. Mourey
Keyword(s):  
Sol Gel ◽  
Star Polymers ◽  
Synthesis And Characterization ◽  
Sol Gel Process
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