Modeling performance of rhamnolipid-coated engineered magnetite nanoparticles for U(vi) sorption and separation

2020 ◽  
Vol 7 (7) ◽  
pp. 2010-2020
Author(s):  
Neha Sharma ◽  
Anushree Ghosh ◽  
John D. Fortner ◽  
Daniel E. Giammar
Keyword(s):  
Iron Oxide ◽  
Water Chemistry ◽  
Iron Oxide Nanoparticles ◽  
Magnetite Nanoparticles ◽  
Oxide Nanoparticles

Iron oxide nanoparticles were stabilized in water using the biosurfactant rhamnolipid, and the adsorption of U(vi) to these nanoparticles was measured and modeled as a function of water chemistry.

Magnetite nanoparticles program the assembly, response, and reconfiguration of structured emulsions

Soft Matter ◽  
2019 ◽  
Vol 15 (7) ◽  
pp. 1529-1538 ◽  
Author(s):  
Tamás A. Prileszky ◽  
Eric M. Furst
Keyword(s):  
Iron Oxide ◽  
Magnetic Fields ◽  
Iron Oxide Nanoparticles ◽  
Magnetite Nanoparticles ◽  
Shape Change ◽  
Oxide Nanoparticles ◽  
Emulsion Droplets ◽  
Ferromagnetic Iron ◽  
External Stimuli

Endoskeletal droplets—non-spherical emulsion droplets that respond to external stimuli with shape change—are modified with ferromagnetic iron oxide nanoparticles to make them susceptible to magnetic fields.

scholarly journals Superparamagnetic Iron Oxide Nanoparticles and Essential Oils: A New Tool for Biological Applications

2020 ◽  
Vol 21 (18) ◽  
pp. 6633
Author(s):  
Maria Graça Miguel ◽  
João Paulo Lourenço ◽  
Maria Leonor Faleiro
Keyword(s):  
Iron Oxide ◽  
Essential Oils ◽  
Iron Oxide Nanoparticles ◽  
Magnetite Nanoparticles ◽  
Current Knowledge ◽  
Superparamagnetic Iron Oxide ◽  
Biological Properties ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Pathogenic Microorganisms

Essential oils are complex mixtures of volatile compounds with diverse biological properties. Antimicrobial activity has been attributed to the essential oils as well as their capacity to prevent pathogenic microorganisms from forming biofilms. The search of compounds or methodologies with this capacity is of great importance due to the fact that the adherence of these pathogenic microorganisms to surfaces largely contributes to antibiotic resistance. Superparamagnetic iron oxide nanoparticles have been assayed for diverse biomedical applications due to their biocompatibility and low toxicity. Several methods have been developed in order to obtain functionalized magnetite nanoparticles with adequate size, shape, size distribution, surface, and magnetic properties for medical applications. Essential oils have been evaluated as modifiers of the surface magnetite nanoparticles for improving their stabilization but particularly to prevent the growth of microorganisms. This review aims to provide an overview on the current knowledge about the use of superparamagnetic iron oxide nanoparticles and essential oils on the prevention of microbial adherence and consequent biofilm formation with the goal of being applied on the surface of medical devices. Some limitations found in the studies are discussed.

Rolling and unrolling of graphene sheets via in situ generation of superparamagnetic iron oxide nanoparticles

2019 ◽  
Vol 21 (30) ◽  
pp. 16413-16417 ◽  
Author(s):  
Meera Sathyan ◽  
M. K. Jayaraj ◽  
Honey John
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Magnetite Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Graphene Sheets ◽  
In Situ Generation

The role of magnetite nanoparticles in the scrolling and unscrolling of graphene sheets.

Controllable synthesis of exceptionally small-sized superparamagnetic magnetite nanoparticles for ultrasensitive MR imaging and angiography

2021 ◽  
Author(s):  
Pingli Dong ◽  
Tingting Zhang ◽  
Huijing Xiang ◽  
Xue Xu ◽  
Yihui Lv ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Mr Imaging ◽  
Iron Oxide Nanoparticles ◽  
Magnetite Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Diagnosis And Treatment ◽  
Oxide Nanoparticles ◽  
Controllable Synthesis ◽  
Broad Application ◽  
Application Prospects

The superparamagnetic iron oxide nanoparticles have broad application prospects in the diagnosis and treatment of cancer.

Magnetic Nanoparticles: Synthesis and Properties

2015 ◽  
Vol 241 ◽  
pp. 177-201
Author(s):  
Kishor G. Rewatkar
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Magnetite Nanoparticles ◽  
Materials Science ◽  
Oxide Nanoparticles ◽  
Creative Imagination ◽  
Chemical Route ◽  
High Gradient Magnetic Separation ◽  
Wide Range ◽  
Almost All

The discovery of novel materials, processes, and phenomena at the nanoscale and the development of new experimental and theoretical techniques for research provide fresh opportunities for the development of innovative nanosystems and nanostructured materials. Nanomaterials with tailored unique properties have limitless possibilities in materials science. The most widely used synthesis routes for iron oxide nanoparticles are based on precipitation from solution. Most of the nanoparticles available to date have been prepared using chemical route. Physical processes have also been recently developed to produce high quality monodisperse and monocrystalline iron oxide nanoparticles. Magnetite has recently attracted attention because bulk Fe3O4has a high Curie temperature of 850 K and nearly full spin polarization at room temperature, and due to its wide range of applications in almost all branches of science and technology. Clearly, nanoscale magnetite offers potential for creation of novel technology in multiple fields of study. Opportunities for magnetite nanoparticles to be effectively incorporated into environmental contaminant removal and cell separation magnetically guided drug delivery, imaging of tissue and organs, magnetocytolysis, sealing agents (liquid O-rings), dampening and cooling mechanisms in loudspeakers, high gradient magnetic separation (HGMS) techniques and contrasting agents for magnetic resonance imaging (MRI). Advancement of synthesis and stabilization procedures towards production of uniformly sized, dispersed (potentially embedded) magnetite nanoparticles has clearly inspired creative imagination and application in various fields.

scholarly journals Alginate and Gum Arabic Coated Iron Oxide Nanoparticles as an Efficient Drug Carrier Agent

2021 ◽  
Vol 34 (1) ◽  
pp. 133-139
Author(s):  
Jaiveer Singh ◽  
Arti Jangra ◽  
Keerti Rani ◽  
Parvin Kumar ◽  
Suresh Kumar ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Surface Functionalization ◽  
Magnetite Nanoparticles ◽  
Drug Carrier ◽  
Drug Loading ◽  
Gum Arabic ◽  
Oxide Nanoparticles ◽  
Magnetic Iron Oxide Nanoparticles ◽  
Coating Materials

Multifunctional iron oxide nanoparticles have a vast and emerging scope in the field of nanotechnology. Out of numerous techniques available to develop multifunctional magnetite nanoparticles, co-precipitation is considered as one of the most efficient and economical techniques. Bare magnetite nanoparticles could be functionalized to act as multifunctional nanoparticles with the help of some suitable and biocompatible coating materials. In present study, surface functionalization of magnetic iron oxide nanoparticles has been carried out with alginate and gum Arabic, respectively. For the confirmation of surface functionalization, the synthesized multifunctional magnetite nanoparticles were characterized FTIR spectroscopy and thermogravimetric analysis. Further, the drug loading efficiency of these surface coated iron oxide nanoparticles has been evaluated with the help of UV-visible spectrophotometric studies

scholarly journals Comparative Studies of Dye Removal Efficiency of Surface Functionalized Nanoparticles with Other Adsorbents: Isotherm and Kinetic Study

2021 ◽  
Vol 33 (12) ◽  
pp. 3031-3038
Author(s):  
Arti Jangra ◽  
Jaiveer Singh ◽  
Radhika Khanna ◽  
Parvin Kumar ◽  
Suresh Kumar ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Humic Acid ◽  
Iron Oxide Nanoparticles ◽  
Removal Efficiency ◽  
Magnetite Nanoparticles ◽  
Dye Removal ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction ◽  
Crystal Violet Dye ◽  
Pseudo Second Order

In present work, the synthesis of the humic acid functionalized iron oxide nanoparticles and their application in water treatment are reported. The bare and humic acid functionalized iron oxide nanoparticles were characterized using different techniques such as X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), thermogravimetric analysis (TGA) and Fourier transform infrared (FTIR) spectroscopy. The synthesized magnetite nanoparticles coated with humic acid showed efficient removal of crystal violet dye from the aqueous solution. The functionalized magnetite nanoparticles were found to have higher adsorption capacity as compared to bare magnetite nanoparticles and the pure humic acid under specific conditions. The adsorption kinetics study was found in accordance with pseudo-second order kinetics while the isotherm data was observed to be in good agreement with the Tempkin isotherm. A comparative study of dye removal efficiency of humic acid functionalized magnetite nanoparticles with reported adsorbents has also been made.

Retracted Article: Equilibrium and kinetic studies on adsorptive removal of malachite green by the citrate-stabilized magnetite nanoparticles

RSC Advances ◽  
2014 ◽  
Vol 4 (93) ◽  
pp. 51787-51793 ◽  
Author(s):  
Rashmi Rani Mishra ◽  
Preethy Chandran ◽  
S. Sudheer Khan
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Malachite Green ◽  
Magnetite Nanoparticles ◽  
Kinetic Studies ◽  
Oxide Nanoparticles ◽  
Efficient Removal ◽  
Adsorptive Removal ◽  
Retracted Article

Citrate-stabilized iron oxide nanoparticles can be used for the efficient removal of malachite green.

Cr(VI) Adsorption on Engineered Iron Oxide Nanoparticles: Exploring Complexation Processes and Water Chemistry

2019 ◽  
Vol 53 (20) ◽  
pp. 11913-11921 ◽  
Author(s):  
Zezhen Pan ◽  
Xiaoming Zhu ◽  
Anshuman Satpathy ◽  
Wenlu Li ◽  
John D. Fortner ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Water Chemistry ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles

scholarly journals Utilization of Neem Leaf Extract on Biosynthesis of Iron Oxide Nanoparticles

Molecules ◽  
2019 ◽  
Vol 24 (20) ◽  
pp. 3803 ◽  
Author(s):  
Nur Diyana Syazwani Zambri ◽  
Nurul Izza Taib ◽  
Famiza Abdul Latif ◽  
Zakiah Mohamed
Keyword(s):  
Electron Microscope ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Magnetite Nanoparticles ◽  
Leaf Extract ◽  
Xrd Analysis ◽  
Oxide Nanoparticles ◽  
Spectra Analysis ◽  
X Ray ◽  
Average Size

The present work reports the successful synthesis of biosynthesized iron oxide nanoparticles (Fe3O4-NPs) with the use of non-toxic leaf extract of Neem (Azadirachta indica) as a reducing and stabilizing agent. The successful synthesis was confirmed by infrared spectra analysis with strong peak observed between 400–600 cm−1 that corresponds to magnetite nanoparticles characteristics. X-ray diffraction (XRD) analysis revealed that iron oxide nanoparticles were of high purity with crystalline cubic structure phases in nature. Besides, the average size of magnetite nanoparticles was observed to be 9–12 nm with mostly irregular shapes using a transmission electron microscope (TEM) and was supported by field emission scanning electron microscope (FESEM). Energy dispersive X-ray analysis shown that the elements iron (Fe) and oxygen (O) were present with atomic percentages of 33.29% and 66.71%, respectively. From the vibrating sample magnetometer (VSM) analysis it was proven that the nanoparticles exhibited superparamagnetic properties with a magnetization value of 73 emu/g and the results showed superparamagnetic behavior at room temperature, suggesting potential applications for a magnetic targeting drug delivery system.

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