Facile synthesis of MnFe2O4 nanoparticles and investigation of various reductant and capping agents on their size and morphology

This study investigate the role of hydroxide ions (OH-) in the synthesis of Ni nanoparticles through polyol method at the temperature of 180°C. Ni nanoparticles were prepared using ethylene glycol (EG) as the solvent and hydrazine (N2H4) as the reducing agent. Sodium hydroxide (NaOH) was used to introduce the OH-in solutions. Amount of OH-has been controlled through manipulation of OH-/Ni2+ratios. The role of OH-has been discussed in terms of size, morphology and reaction rate. Particles size and morphology were determined by Transmission Electron Microscopy (TEM). X-Ray Diffractometer (XRD) was used to verify the chemical composition of as-synthesized particles. The results demonstrated that at temperature of 180°C, Ni nanoparticles can be synthesized even without the existance of OH-. Although there no significant particles size changes,synthesis without OH-showed the most rapid reaction as compared to samples with OH-. Probable mechanisms for formation of Ni nanoparticles with and without OH-are also discussed. This finding contribute to a new rapid and facile synthesis of Ni nanoparticles.

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Facile Synthesis of Monodispersed Ag NPs in Ethylene Glycol Using Mixed Capping Agents

ACS Omega ◽

10.1021/acsomega.9b04492 ◽

2020 ◽

Vol 5 (11) ◽

pp. 6069-6073 ◽

Cited By ~ 1

Author(s):

Suyue Chen ◽

Jacob R. Drehmel ◽

R. Lee Penn

Keyword(s):

Ethylene Glycol ◽

Facile Synthesis ◽

Ag Nps ◽

Capping Agents

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Facile synthesis and temperature dependent dielectric properties of MnFe2O4 nanoparticles

10.1063/1.5112943 ◽

2019 ◽

Author(s):

Pankaj Singh Rawat ◽

R. C. Srivastava ◽

Gagan Dixit ◽

G. C. Joshi ◽

K. Asokan

Keyword(s):

Dielectric Properties ◽

Temperature Dependent ◽

Facile Synthesis ◽

Mnfe2o4 Nanoparticles

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Size-Controlled Facile Synthesis of Silver Nanoparticles by Chemical Reduction Method and Their Antibacterial Performance Against Staphylococcus Aureus and Escherichia Coli

10.21203/rs.3.rs-359254/v1 ◽

2021 ◽

Author(s):

Sanjoy Halder ◽

Aninda Nafis Ahmed ◽

M A Gafur ◽

Gimyeong Seong ◽

Muhammad Zamir Hossain

Keyword(s):

Escherichia Coli ◽

Staphylococcus Aureus ◽

Silver Nanoparticles ◽

Chemical Reduction ◽

Facile Synthesis ◽

Capping Agents ◽

X Ray ◽

E Coli ◽

Antibacterial Performance ◽

Size Controlled

Abstract This article describes the size-controlled one-pot facile synthesis of silver nanoparticles (AgNPs) and their antibacterial response against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) bacteria. AgNPs coated with and without trisodium citrate (TSC) were synthesized using silver nitrate aqueous precursor and hydrazine as a reducing agent. The appearance of yellowish color with surface plasmon resonance (SPR) with maximum absorbance (λmax) at 416 nm from the ultraviolet-visible (UV–vis) spectrum of the product indicated primarily the formation of the desired product. X-ray diffraction (XRD) pattern confirmed the crystallinity of those products. Field emission scanning microscopy (FESEM) and transmission electron microscopy (TEM) images indicated only spherical AgNPs formation. The existence of a functional group of chemically bonded surface capping agents is confirmed by Fourier transform infrared (FTIR) and the themogravimetric analysis (TGA) weight loss assessment proved the attachment of good amount of capping agents. Energy dispersive X-ray (EDX) spectroscopic analysis of products revealed the existence of high percentage (96.36%) of silver. Exposing the synthesized AgNPs to Gram-positive S. aureus and Gram-negative E. coli bacteria, the zone inhibition was found to be 8 mm and 6 mm at a concentration of 50 mgL− 1, respectively. These results imply that TSC capped AgNPs can be considered as effective human pathogens for S. aureus and E. coli which is very inspiring.

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