scholarly journals Preparation and Characterization of Green Fe3 O4 Nanoparticle Using the Aqueous Plant Extract of Gundelia tournefortii L.

2021 ◽  
Vol 9 (2) ◽  
pp. 58-63
Author(s):  
Aveen F. Jalal ◽  
Nabil A. Fakhre
Keyword(s):  
Electron Microscopy ◽  
Plant Extract ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Stabilizing Agents ◽  
Green Approach ◽  
Fe3o4 Nps ◽  
Transmission Electron ◽  
Aqueous Leaf Extract

In this work, the magnetite nanoparticles (Fe3O4-NPs) synthesized using a simple, fast, and environmentally acceptable green approach. Gundelia Tournefortii Extract, an aqueous plant extract, was used for the first time in green synthesis to prepare nanoparticles as reducing, capping, and stabilizing agents. Such biomolecules as flavonoids, alkaloids, and antioxidants are found in the aqueous leaf extract, and their presence has been determined to have an important role in the synthesis of Fe3O4-NPs. The techniques used in this analysis include Fourier Transform Infrared, Scanning Electron Microscopy, Energy-Dispersive X-ray spectroscopy, X-ray Diffraction, Transmission Electron Microscopy, and Vibrating Sample Magnetometer. The Vibrating Sample Magnetometer demonstrated that the samples were superparamagnetic, with a magnetization value of 48.6 emu/g. The prepared nanoparticle was applied to  remove Chrystal Violet (CV), Malachite Green(MG), and Safranin (S) dyes from prepared aqueous solutions with the adsorption capacity of 13.9, 15.6, and 14.4 mg/g respectively.

An expeditious one-pot synthesis of pyrido[2,3-d]pyrimidines using Fe3O4–ZnO–NH2–PW12O40 nanocatalyst

2019 ◽  
Vol 43 (3-4) ◽  
pp. 135-139
Author(s):  
Pegah Farokhian ◽  
Manouchehr Mamaghani ◽  
Nosrat Ollah Mahmoodi ◽  
Khalil Tabatabaeian ◽  
Abdollah Fallah Shojaie
Keyword(s):  
Electron Microscopy ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
Facile Synthesis ◽  
Pyrimidine Derivatives ◽  
One Pot ◽  
X Ray ◽  
Transmission Electron ◽  
Novel Method ◽  
Operational Simplicity

An efficient protocol for the facile synthesis of a series of pyrido[2,3- d]pyrimidine derivatives has been developed applying Fe3O4–ZnO–NH2–PW12O40 nanocatalyst in water. This novel method has the benefits of operational simplicity, green aspects by avoiding toxic solvents and high to excellent yields of products. Fe3O4–ZnO–NH2–PW12O40 was synthesized and characterized by Fourier transform infrared, X-ray diffraction, vibrating sample magnetometer, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and transmission electron microscopy analyses. The nanocatalyst is readily isolated and recovered from the reaction mixture by an external magnet.

A Facile Method for the Synthesis of Silver Nanoparticles in the Presence of Sodium Phosphate

2011 ◽  
Vol 109 ◽  
pp. 174-177 ◽  
Author(s):  
Yu Li Shi ◽  
Qi Zhou ◽  
Li Yun Lv ◽  
Wang Hong
Keyword(s):  
Electron Microscopy ◽  
Silver Nanoparticles ◽  
Sodium Phosphate ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Stabilizing Agents ◽  
Transmission Electron ◽  
Silver Nps ◽  
Uv Visible

A facile method for the synthesis of silver nanoparticles (NPs) has been developed by using sodium phosphate (Na3PO4) as stabilizing agents and glucose the reducing agent, respectively. The obtained silver NPs have been characterized by X-ray diffraction (XRD), UV-visible spectroscopy (UV-vis) and transmission electron microscopy (TEM). It was found that in the presence of sodium phosphate, silver NPs with different morphologies and sizes were obtained. The formation mechanism of diverse silver NPs was studied preliminarily.

scholarly journals Sintesis Nanopartikel Nickel Ferrite (NiFe2O4) dengan Metode Kopresipitasi dan Karakterisasi Sifat Kemagnetannya (Halaman 20 s.d. 25)

2015 ◽  
Vol 19 (56) ◽  
Author(s):  
Muflihatun ◽  
Siti Shofiah ◽  
Edi Suharyadi
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fourier Transform ◽  
Nickel Ferrite ◽  
Fourier Transform Infrared ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron

Nanopartikel Nikel Ferit (NiFe2O4) telah disintesis dengan metode kopresipitasi dengan memvariasi konsentrasi NaOH dan suhu sintesis. Struktur kristal, ukuran partikel, dan morfologi dari sampel dianalisa menggunakan X-ray diffraction (XRD) dan transmission electron microscopy (TEM). Ukuran butir pada konsentrasi NaOH 3, 5, dan 10 M masing-masing adalah 5,7; 4,3; dan 4,2 nm, sedangkan pada suhu 60, 80, dan 150°C berturut-turut adalah 4,2; 4,9; dan 5,5 nm. Analisa fourier transform infrared (FTIR) menunjukkan dua puncak serapan pada rentang ~400-600 cm-1 yang terkait dengan site oktahedral dan tetrahedral pada struktur NiFe2O4. Sifat magnetik NiFe2O4 hasil analisa vibrating sample magnetometer (VSM) menunjukkan bahwa sampel berperilaku ferromagnetik dengan nilai koersivitasnya pada rentang 42-47 Oe. Sampel dengan variasi konsentrasi NaOH, koersivitasnya cenderung menurun dengan menurunnya ukuran partikel. Sementara sampel dengan variasi suhu, semakin kecil ukuran partikel, koersivitasnya cenderung meningkat. Pada 15 kOe, nilai magnetisasi terbesar (6,17 emu/g) diperoleh pada sampel dengan rasio fasa α-Fe2O3 paling rendah.

scholarly journals Biosynthesis, characterisation and therapeutic applications of plant-mediated silver nanoparticles

2018 ◽  
Vol 83 (5) ◽  
pp. 515-538 ◽  
Author(s):  
Andreia Corciova ◽  
Bianca Ivanescu
Keyword(s):  
Electron Microscopy ◽  
Silver Nanoparticles ◽  
Nanoparticle Synthesis ◽  
Special Importance ◽  
X Ray Diffraction ◽  
X Ray ◽  
Stabilizing Agents ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Nanoparticles Synthesis

Nanotechnology is one of the most studied domains, and nanoparticle synthesis, especially of silver nanoparticles, has gained special importance due to their properties, biocompatibility and applications. Today, the processes of nanoparticles synthesis tend toward the development of inexpensive, simple, non-toxic and environmentally friendly methods. Thus, the use of plants in the synthesis of silver nanoparticles has attracted considerable interest because biomolecules can act as both reducing and stabilizing agents. This survey aims at discussing the conditions for obtaining silver nanoparticles using plants and their characterization by several methods, such as FTIR and UV?Vis spectroscopy, X-ray diffraction, and scanning and transmission electron microscopy. In addition, it examines some of the most common biological uses of silver nanoparticles: antibacterial, antioxidant and cytotoxic.

Preparation and Surface Modification of Magnetic Fe3O4 Nanoparticles

2020 ◽  
Vol 12 (2) ◽  
pp. 131-136
Author(s):  
Sha-Sha Li ◽  
Zao Tian ◽  
De-Zhan Tian ◽  
Lei Fang ◽  
Yu-Wei Huang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Saturation Magnetization ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Magnetic Fe3o4 Nanoparticles ◽  
Magnetic Fe3o4 ◽  
Scanning Electron

In this work, the coprecipitation method was used to prepare the magnetic Fe3O4 nanoparticles which were characterized by X-ray diffraction (XRD), vibrating sample magnetometer (VSM), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The particle size and saturation magnetization of Fe3O4 nanoparticles were significant effected by temperature and the precipitant's precipitation time. Under the reaction temperature of 40 °C and the dropping time of 10 h, the size and the saturation magnetization of magnetic Fe3O4 nanoparticles were 9.4 nm and 37.5 emu/g, severally. Besides, the magnetic Fe3O4 nanoparticles were also resoundingly modified with silica (SiO2), chitosan (CS) and sodium alginate (SA). And the hydrodynamic diameters of the Fe3O4/CS micro-composites and Fe3O4/SA micro-composites in aqueous solution were 1.16 μm and 2.11 μm, respectively.

scholarly journals Pengaruh Konsentrasi Polyethylene glycol (PEG) pada Sifat Kemagnetan Nanopartikel Magnetik PEG-Coated Fe3O4 (Halaman 35 s.d. 40)

2014 ◽  
Vol 17 (51) ◽  
Author(s):  
Seveny Nuzully ◽  
Takeshi Kato ◽  
Edi Suharyadi
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fourier Transform ◽  
Polyethylene Glycol ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Peg 4000 ◽  
Infra Red

Nanopartikel magnetit (Fe3O4) telah berhasil disintesis menggunakan metode kopresipitasi dengan penambahan Polyethylene Glycol (PEG-4000) sebagai coating. Distribusi ukuran partikel dan sifat magnetik dari nanopartikel ini diteliti berdasarkan perbandingan massa Fe3O4 dan PEG, yaitu 1:1, 2:1, 3:1, 4:1, 1:2, dan 1:3. Distribusi ukuran partikel dikarakteristik dengan Transmission Electron Microscopy (TEM) sedangkan pengujian awal untuk mengetahui struktur kristal yang terkandung dalam sampel hasil sintesis dikarakteristik dengan X-Ray Diffraction (XRD), kemudian untuk mengetahui keberhasilan coating PEG dapat dikarakterisasi dengan menggunakan Fourier Transform Infra Red (FTIR) serta sifat magnetiknya dapat dikarakterisasi menggunakan Vibrating Sample Magnetometer (VSM). Sampel 1:1, 2:1, 3:1, 4:1, 1:2, 1:3 berturut-turut meiliki nilai Ms 37,2; 49,7; 55,2; 61,7; 27,7; 33,7 dan nilai Mr 4,8; 6,4; 6,6; 8,0; 3,3; 4,7. Hasil karakterisasi menunjukkan bahwa penambahan konsentrasi PEG mengakibatkan nilai saturation magnetic (Ms) dan remanence magnetic (Mr) turun, kecuali pada sampel dengan perbandingan 1:3.

scholarly journals Pengaruh Konsentrasi Polyethylene glycol (PEG) pada Sifat Kemagnetan Nanopartikel Magnetik PEG-Coated Fe3O4 (Halaman 35 s.d. 40)

2014 ◽  
Vol 17 (51) ◽  
Author(s):  
Seveny Nuzully ◽  
Takeshi Kato ◽  
Edi Suharyadi
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fourier Transform ◽  
Polyethylene Glycol ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Peg 4000 ◽  
Infra Red

Nanopartikel magnetit (Fe3O4) telah berhasil disintesis menggunakan metode kopresipitasi dengan penambahan Polyethylene Glycol (PEG-4000) sebagai coating. Distribusi ukuran partikel dan sifat magnetik dari nanopartikel ini diteliti berdasarkan perbandingan massa Fe3O4 dan PEG, yaitu 1:1, 2:1, 3:1, 4:1, 1:2, dan 1:3. Distribusi ukuran partikel dikarakteristik dengan Transmission Electron Microscopy (TEM) sedangkan pengujian awal untuk mengetahui struktur kristal yang terkandung dalam sampel hasil sintesis dikarakteristik dengan X-Ray Diffraction (XRD), kemudian untuk mengetahui keberhasilan coating PEG dapat dikarakterisasi dengan menggunakan Fourier Transform Infra Red (FTIR) serta sifat magnetiknya dapat dikarakterisasi menggunakan Vibrating Sample Magnetometer (VSM). Sampel 1:1, 2:1, 3:1, 4:1, 1:2, 1:3 berturut-turut meiliki nilai Ms 37,2; 49,7; 55,2; 61,7; 27,7; 33,7 dan nilai Mr 4,8; 6,4; 6,6; 8,0; 3,3; 4,7. Hasil karakterisasi menunjukkan bahwa penambahan konsentrasi PEG mengakibatkan nilai saturation magnetic (Ms) dan remanence magnetic (Mr) turun, kecuali pada sampel dengan perbandingan 1:3.

Synthesis and electromagnetic properties of nanodendritic γ′-Fe4N

2016 ◽  
Vol 09 (02) ◽  
pp. 1650021 ◽  
Author(s):  
Mengna Zhu ◽  
Meijie Yu ◽  
Qiong Mao ◽  
Fazhan Li ◽  
Chengguo Wang
Keyword(s):  
Electron Microscopy ◽  
Dendritic Morphology ◽  
Electromagnetic Properties ◽  
Network Analyzer ◽  
Vibrating Sample Magnetometer ◽  
Nitriding Temperature ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Nitrogen Potential

Nanodendritic [Formula: see text]-Fe4N was successfully synthesized through a nitriding process from dendritic [Formula: see text]-Fe2O3, which was prepared by hydrothermal method using potassium ferricyanide (K3[Fe(CN)6]) as iron source. The structure and electromagnetic properties of this material were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), vibrating sample magnetometer (VSM) and vector network analyzer (VNA). The results revealed that the dendritic morphology can be mostly inherited from [Formula: see text]-Fe2O3 to [Formula: see text]-Fe4N by controlling the nitriding temperature, duration and nitrogen potential precisely. The dendritic [Formula: see text]-Fe4N has the saturation magnetization of 146[Formula: see text]emu/g and the coercive force of 94[Formula: see text]Oe at 300[Formula: see text]K. The maximum reflection loss is [Formula: see text][Formula: see text]dB at 3[Formula: see text]GHz with the thickness of 3.0[Formula: see text]mm for the composite sample.

scholarly journals Sintesis Nanopartikel Manganese Ferrite (MnFe2O4) dengan Metode Kopresipitasi dan Karakterisasi Sifat Kemagnetannya (Halaman 1 s.d. 7)

2015 ◽  
Vol 18 (52) ◽  
Author(s):  
Rosita Dewi Tawainella ◽  
Yuni Riana ◽  
Rusliana Fatayati ◽  
Amelliya ◽  
Takeshi Kato ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Vibrating Sample Magnetometer ◽  
Manganese Ferrite ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron

Telah disintesis nanopartikel magnetit dengan berbagai ukuran butir yang berbeda yang berasal dari bahan MnSO4H2O dan FeCl3.6H2O  dengan metode kopresipitasi dengan memvariasi parameter suhu dan konsentrasi NaOH. Struktur dan ukuran partikel hasil analisa X-Ray Diffraction (XRD) dan Transmission Electron Microscopy (TEM) menunjukkan bahwa nanopartikel mengkristal dengan baik dan ada ketergantungan ukuran butir nanopartikel terhadap dua variasi parameter sintesis tersebut. Ukuran butir yang dihitung menggunakan persamaan Scherrer menunjukkan bahwa ukuran butir meningkat seiring peninggkatan suhu dan berkurangnya konsentrasi NaOH. Sifat kemagnetan MnFe2O4 hasil analisa Vibrating Sample Magnetometer (VSM). Sampel dengan variasi konsentrasi NaOH, semakin kecil ukuran butir nanopartikel, medan koersivitasnya semakin rendah. Sementara untuk sampel dengan variasi suhu, semakin kecil ukuran butir, medan koersivitasnya semakin tinggi. Hasil VSM juga menunjukkan bahwa semakin tinggi kristalinitas sampel, nilai magnetisasi saturasinya semakin tinggi. Dengan demikian dapat disimpulkan bahwa ukuran butir dan kehadiran fasa pengotor hematit (α-Fe2O3) mempengaruhi sifat kemagnetan nanopartikel MnFe2O4. 

scholarly journals Green Synthesis of Iron Oxide-Palladium Nanocomposites by Pepper extract and Its Application in Removing of Colored Pollutants from Water

2017 ◽  
Vol 7 (3) ◽  
Author(s):  
Shahab Khaghani
Keyword(s):  
Electron Microscopy ◽  
Fe3o4 Nanoparticles ◽  
Catalytic Properties ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Ultraviolet Light Irradiation ◽  
Paramagnetic Behaviour ◽  
Catalytic Behaviour

Fe3O4 nanoparticles were synthesized in the presence of pepper extract as a capping agent via a hydrothermal method. Then palladium nanoparticles and Fe3O4-Pd nanocomposites were synthesized with the aid of pepper extract as a reducing agent. Vibrating Sample magnetometer illustrated that Fe3O4 nanoparticles have super paramagnetic behaviour. The photo catalytic behaviour of Fe3O4-Pd nanocomposites was investigated using the degradation of two azo dyes under ultraviolet light irradiation. The results show that nanocomposites have feasible magnetic and photo catalytic properties. The prepared products were characterized by X-ray diffraction pattern, scanning electron microscopy, transmission electron microscopy and Fourier transform infrared spectroscopy.

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