Investigations of suspension stability of iron oxide nanoparticles using time-resolved UV–visible spectroscopy

2016 ◽  
Vol 18 (9) ◽  
Author(s):  
S. Vikram ◽  
R. Vasanthakumari ◽  
Takuya Tsuzuki ◽  
Murali Rangarajan
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Suspension Stability ◽  
Visible Spectroscopy ◽  
Time Resolved ◽  
Uv Visible

Diospyros lotus-mediated Synthesis of Iron Oxide Nanoparticles and Their Application as a Catalyst in Fenton Reaction

2020 ◽  
Vol 16 (1) ◽  
pp. 91-100
Author(s):  
Sadaf Batool ◽  
Zakir Hussain
Keyword(s):  
Methylene Blue ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Environmental Remediation ◽  
Metal Salt ◽  
Blue Dye ◽  
Oxide Nanoparticles ◽  
Visible Spectroscopy ◽  
Diospyros Lotus ◽  
Uv Visible

Background: : Iron Oxide nanoparticles have enormous applications in environmental remediation and catalysis. The synthesis of such nanoparticles through a green approach provides a significant advantage due to the non-toxic nature of the ingredients involved. Method: : In the present work, Diospyros lotus fruit extract was used for the synthesis of iron oxide nanoparticles (NPs). The plant biomolecules were extracted employing two different solvents, i.e. water and methanol. The effect of both the extracts on the reduction of metal salt as well as on the shape and size of the produced NPs was investigated. Results:: UV-Visible spectroscopy confirmed the synthesis of iron oxide NPs, Fourier Transform Infrared (FTIR) spectrum depicted the presence of biomolecules on the surface of NPs as capping agents, X-ray Diffraction (XRD) diffractogram confirmed the crystalline structure of mixed iron oxide NPs and Scanning Electron Microscopy (SEM) images showed the spherical shape of NPs. The synthesized NPs were exploited to catalyze the degradation of methylene blue dye in the Fenton type catalytic reaction. The degradation reaction was monitored using UV-Visible spectroscopy, which indicated that the percent degradation increased from 15% (without iron oxide NPs) to 91% in the presence of organic extract prepared iron oxide NPs and to 81% in the presence of aqueous extract prepared iron oxide NPs. The effect of the concentration of methylene blue and iron oxide NPs on the degradation process was also investigated. Conclusion: : The results indicated the potential of synthesized nanoparticles to promote catalytic reactions involved in environmental remediation.

Shaping and Cellular Uptake of Folic Acid Coated Gold and Magnetite Nanoparticles

2019 ◽  
Vol 9 (2) ◽  
pp. 166-172
Author(s):  
Ahmed A.G. El-Shahawy ◽  
Gamal Elghnam ◽  
Alsayed A.M. Alsherbini
Keyword(s):  
Folic Acid ◽  
Iron Oxide ◽  
Tumor Cells ◽  
Iron Oxide Nanoparticles ◽  
Individual Cell ◽  
Oxide Nanoparticles ◽  
Cellular Compartment ◽  
Specific Tumor ◽  
Uv Visible

Background:Gold and Iron Oxide nanoparticles NPs play as nanocarriers for a specific drug delivery and contrast agents. Intercellular uptake of these nanoparticles and targeting to individual cell and sub-cellular compartment is essential.Objective:The aim of the current study is to evaluate the intracellular uptake of these NPs to specific tumor cells in vitro conjugated with folic acid with a goal of enhancing the efficiency of specific targeting to tumor cells.Methods:We synthesized the nanoparticles by a chemical method and characterized by UV-Visible, FTIR, XRD, and TEM.Results & Conclusion:The results revealed the conjugation of Gold and Iron Oxide nanoparticles with folic acid increased the intercellular uptake with high percent compared to non- conjugated nanoparticles.

PHOTOCATALYTIC DEGRADATION OF METHYLENE BLUE USING IRON OXIDE NANOPARTICLES SYNTHESIZED USING ANNONA MURICATA LEAF EXTRACT

2020 ◽  
pp. 46-51
Author(s):  
BEENA JOSE ◽  
FEMY THOMAS
Keyword(s):  
Electron Microscopy ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Leaf Extract ◽  
Iron Oxide Nanoparticle ◽  
Oxide Nanoparticles ◽  
Annona Muricata ◽  
Aqueous Leaf Extract ◽  
Oxide Nanoparticle ◽  
Uv Visible

Objective: The objective of the present study is the synthesis of iron oxide nanoparticles using Annona muricata aqueous leaf extract, characterization of the synthesized nanoparticles and evaluation of the antibacterial, photocatalytic activity and cytotoxicity. Methods: The iron oxide nanoparticle was synthesized using Annona muricata aqueous leaf extract and the crystal structure of the iron oxide nanoparticle was determined by UV-Visible spectroscopy, Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR). The in vitro cytotoxicity of iron oxide nanoparticles was evaluated using Dalton’s lymphoma ascites cells and the antibacterial assay was conducted using agar well diffusion method. Results: The UV-Visible spectrum of iron oxide nanoparticle showed a maximum absorption peak at 265 nm. This is the XRD pattern of iron oxide nanoparticles exhibited a distinct peak at 26.029 (2θ), accounting for crystal plane (211). SEM images revealed that the synthesized iron oxide nanoparticles were aggregated as irregular sphere shapes with rough surfaces. TEM image reveals the size of the synthesized iron oxide nanoparticles are spherical in shape with an average size of 20 nm. Green synthesized iron oxide nanoparticles using Annona muricata leaf extract effectively degraded methylene blue dye. Conclusion: This study showed that the synthesized iron oxide nanoparticles using Annona muricata aqueous leaf extract exhibited pronounced antibacterial, anticancer and photocatatytic activity and can be used in the textile industry for the purification of water contaminated with carcinogenic textile dyes. It can also be used as an external antiseptic in the prevention and treatment of bacterial infections.

scholarly journals Combining fast-XANES and SAXS for time-resolved studies on the formation mechanism of iron oxide nanoparticles

2015 ◽  
Vol 71 (a1) ◽  
pp. s386-s387
Author(s):  
Anke Kabelitz ◽  
Katrin Schulz ◽  
Ana Guilherme ◽  
Ralf Bienert ◽  
Uwe Reinholz ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Formation Mechanism ◽  
Oxide Nanoparticles ◽  
Time Resolved

scholarly journals Time-resolved in situ studies on the formation mechanism of iron oxide nanoparticles using combined fast-XANES and SAXS

CrystEngComm ◽  
2015 ◽  
Vol 17 (44) ◽  
pp. 8463-8470 ◽  
Author(s):  
Anke Kabelitz ◽  
Ana Guilherme ◽  
Maike Joester ◽  
Uwe Reinholz ◽  
Martin Radtke ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Formation Mechanism ◽  
Oxide Nanoparticles ◽  
Time Resolved ◽  
In Situ Studies

The reaction of iron chlorides with an alkaline reagent is one of the most prominent methods for the synthesis of iron oxide nanoparticles.

Observation of Transient Iron(II) Formation in Dye-Sensitized Iron Oxide Nanoparticles by Time-Resolved X-ray Spectroscopy

2010 ◽  
Vol 1 (9) ◽  
pp. 1372-1376 ◽  
Author(s):  
Jordan E. Katz ◽  
Benjamin Gilbert ◽  
Xiaoyi Zhang ◽  
Klaus Attenkofer ◽  
Roger W. Falcone ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Time Resolved ◽  
X Ray ◽  
Dye Sensitized

scholarly journals Biosynthesized Iron Oxide Nanoparticles (Fe3O4 NPs) Mitigate Arsenic Toxicity in Rice Seedlings

Toxics ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 2
Author(s):  
Sehresh Khan ◽  
Nazneen Akhtar ◽  
Shafiq Ur Rehman ◽  
Shaukat Shujah ◽  
Eui Shik Rha ◽  
...  
Keyword(s):  
Bacillus Subtilis ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Dry Matter ◽  
Oxide Nanoparticles ◽  
Arsenic Toxicity ◽  
Fe3o4 Nps ◽  
Arsenic Stress ◽  
Uv Visible ◽  
Shoot Weight

Arsenic (As) contamination has emerged as a serious public health concern worldwide because of its accumulation and mobility through the food chain. Therefore, the current study was planned to check the effect of Bacillus subtilis-synthesized iron oxide nano particles (Fe3O4 NP) on rice (Oryza Sativa L.) growth against arsenic stress (0, 5, 10 and 15 ppm). Iron oxide nanoparticles were extracellular synthesized from Bacillus subtilis with a desired shape and size. The formations of nanoparticles were differentiated through UV-Visible Spectroscopy, FTIR, XRD and SEM. The UV-Visible spectroscopy of Bacillus subtilis-synthesized nanoparticles showed that the iron oxide surface plasmon band occurs at 268 nm. FTIR results revealed that different functional groups (aldehyde, alkene, alcohol and phenol) were present on the surface of nanoparticles. The SEM image showed that particles were spherical in shape with an average size of 67.28 nm. Arsenic toxicity was observed in seed germination and young seedling stage. The arsenic application significantly reduced seed germination (35%), root and shoots length (1.25 and 2.00 cm), shoot/root ratio (0.289), fresh root and shoots weight (0.205 and 0.260 g), dry root and shoots weight (6.55 and 6.75 g), dry matter percentage of shoot (12.67) and root (14.91) as compared to control. Bacillus subtilis-synthesized Fe3O4 NPs treatments (5 ppm) remarkably increased the germination (65%), root and shoot length (2 and 3.45 cm), shoot/root ratio (1.24) fresh root and shoot weight (0.335 and 0.275 mg), dry root and shoot weight (11.75 and 10.6 mg) and dry matter percentage of shoot (10.40) and root (18.37). Results revealed that the application of Fe3O4 NPs alleviated the arsenic stress and enhanced the plant growth. This study suggests that Bacillus subtilus-synthesized iron oxide nanoparticles can be used as nano-adsorbents in reducing arsenic toxicity in rice plants.

scholarly journals SIMAROUBA GLAUCA BARK EXTRACT MEDIATED SYNTHESIS AND CHARACTERISATION OF IRON OXIDE AND SILVER NANOPARTICLES AND THEIR ANTIBACTERIAL, CYTOTOXIC AND PHOTOCATALYTIC ACTIVITY

2020 ◽  
pp. 23-28
Author(s):  
BEENA JOSE ◽  
RIYA MARTIN
Keyword(s):  
Electron Microscopy ◽  
Silver Nanoparticles ◽  
Photocatalytic Activity ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Absorption Maximum ◽  
Bark Extract ◽  
Oxide Nanoparticles ◽  
Uv Visible ◽  
Simarouba Glauca

Objective: The objective of the present study is the synthesis of iron oxide and silver nanoparticles using Simarouba glauca aqueous bark extract, characterization of the synthesized nanoparticles and evaluation of their antimicrobial, photocatalytic activity and cytotoxicity. Methods: The iron oxide and silver nanoparticles were synthesized using Simarouba glauca aqueous bark extract and crystal structures of the nanoparticles were determined by UV-Visible spectroscopy, Transmission Electron Microscopy, Scanning Electron Microscopy, X-ray Diffraction and Fourier Transform Infrared Spectroscopy. The in vitro cytotoxicity of the silver nanoparticles was evaluated using Dalton’s lymphoma ascites cells. The antibacterial assay of the silver nanoparticles was conducted using agar well diffusion method. Results: The UV-Visible spectrum of iron oxide nanoparticle showed an absorption maximum at 280 nm and silver nanoparticles showed an absorption maximum at 436 nm. This is XRD pattern of iron oxide nanoparticles exhibited a characteristic peak at 26.85 is of maghemite the corresponding miller indices is (211) and the synthesized iron oxide nanoparticles are amorphous in nature. TEM image reveals the size of the synthesized iron oxide nanoparticles in the range of 26-30 nm and the size of silver nanoparticles is in the range of 120-140 nm. Green synthesized iron nanoparticles using Simarouba glauca bark extract effectively degraded methylene blue dye. Conclusion: This study showed that the synthesized iron oxide and silver nanoparticles using Simarouba glauca aqueous bark extract exhibited pronounced antibacterial, anticancer and photocatalytic activity and can be used in the textile industry and also as an external antiseptic in prevention and treatment of bacterial infections.

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