scholarly journals Microwave-Assisted Synthesis of Nickel Oxide Nanoparticles Using Coriandrum sativum Leaf Extract and Their Structural-Magnetic Catalytic Properties

Materials ◽  
2017 ◽  
Vol 10 (5) ◽  
pp. 460 ◽  
Author(s):  
Ramakrishnan Azhagu Raj ◽  
Mohamad AlSalhi ◽  
Sandhanasamy Devanesan
Keyword(s):  
Nickel Oxide ◽  
Leaf Extract ◽  
Catalytic Properties ◽  
Coriandrum Sativum ◽  
Microwave Assisted Synthesis ◽  
Oxide Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Microwave Assisted

Synthesis of NiO Nanoparticles by Microwave Assisted and Molten Salts Methods

2016 ◽  
Vol 721 ◽  
pp. 71-75 ◽  
Author(s):  
Jānis Grabis ◽  
Gundega Heidemane ◽  
Aija Krūmiņa
Keyword(s):  
Nickel Oxide ◽  
Crystallite Size ◽  
Molten Salts ◽  
Urea Solution ◽  
Microwave Assisted Synthesis ◽  
Oxide Nanoparticles ◽  
Nio Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Microwave Assisted ◽  
Direct Formation

Nickel oxide nanoparticles were prepared via molten salts and microwave assisted synthesis from nickel nitrate and the parameters of obtained nanopowders were compared. NiO nanoparticles with crystallite size in the range of 6-8 nm have been prepared by combining microwave assisted treatment of Ni (NO3)2 and urea solution with calcination at 300-320 °C. Molten salts (NaNO2-NaCl) ensured direct formation of NiO from Ni (NO3)2.6H2O and salts mixture at 350 °C but crystallite size of the particles reached 51-69 nm.

Spectroscopic, Structural, and Morphology of Nickel Oxide Nanoparticles Prepared Using Physalis angulata Leaf Extract

2018 ◽  
Vol 917 ◽  
pp. 167-171 ◽  
Author(s):  
Najmawati Sulaiman ◽  
Yoki Yulizar
Keyword(s):  
Electron Microscopy ◽  
Particle Size ◽  
Nickel Oxide ◽  
Band Gap ◽  
Leaf Extract ◽  
Optical Band Gap ◽  
Oxide Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Microscopic Studies ◽  
Nio Nps

Green synthesis of nickel oxide nanoparticles (NiO NPs) usingPhysalisangulataleaf extract (PALE) as weak base sources and stabilizing agents has been reported. Chemical bonding and vibration spectroscopy, crystallographic structure, optical band gap, particle size and microscopic studies of NiO NPs were also investigated. Ni-O vibration modes of NiO NPs were analyzed by FTIR and Raman instrument at ~400 and ~900 cm-1wavenumber. XRD pattern of NiO NPs confirmed cubic crystal structure with space groupFm-3m.Optical band gap of NiO NPs determined by using Tauc plot method was about 3.42 eV. Particle size analyzer showed size distribution of NiO NPs was 64.13 nm which confirm NiO formed in nanoscale. Electron microscopic studies of NiO NPs were observed by using scanning electron microscopy and transmission electron microscopy.

Biological Activity and Characterization of Green Synthesized Nickel Oxide Nanoparticles Derived from Sterculia foetida Leaf Extract

2019 ◽  
Vol 17 (12) ◽  
pp. 977-981
Author(s):  
K. Subashini ◽  
S. Prakash ◽  
V. Sujatha
Keyword(s):  
Antibacterial Activity ◽  
Nickel Oxide ◽  
Leaf Extract ◽  
Combustion Method ◽  
Oxide Nanoparticles ◽  
Solution Combustion ◽  
Nickel Oxide Nanoparticles ◽  
Pxrd Pattern ◽  
Stretching Vibration ◽  
Nio Nps

The catalytic, optical and thermal properties are based on the size of the nanoparticles. Nickel oxide nanoparticles have unique optical property and excellent antibacterial activity. The present study aims for the synthesis of Nickel oxide nanoparticles (NiO NPs) using Sterculia foetida (S. foetida) leaf extract as reducing agent by solution combustion method. The synthesized Nickel oxide nanoparticles (NiO NPs) were confirmed by UV-Visible spectroscopy (UV) with the peak at 370 nm and at the temperature of 450 ± 10 °C, Fourier transform infrared (FTIR) wavelength was observed at 1418 cm–1 1027 cm–1 shows C–O stretching vibration and at 507 cm–1 vibration of Ni–O bond found. Crystalline structure and the formation of monoclinic phase revealed by Powder X-ray diffraction (PXRD) pattern, the percentage of nickel and oxygen of NiO NPs were confirmed with EDAX analysis. The Scanning electron microscopy (SEM) and Transmission electron microscope (TEM) images indicate the shape of Nickel oxide nanoparticles (NiO NPs) with the size range of 10–51 nm. Staphylococcus aureus (S. aureus) (Gram positive) and Escherichia coli (E. coli) (Gram negative) bacteria's were taken to study about antibacterial activity against the green synthesized Nickel oxide nanoparticles (NiO NPs). The Nickel oxide nanoparticles have pharmaceutical and other biomedical applications.

scholarly journals Suaeda maritima (L.) Dumort GREEN SYNTHESIS- REDUCED NICKEL OXIDE NANOPARTICLES FOR ANTIOXIDANT AND BACTERICIDAL ACTIVITY

2021 ◽  
Vol 9 (6) ◽  
pp. 823-830
Author(s):  
T. Krishnasree ◽  
Pavani Peddi
Keyword(s):  
Antioxidant Activity ◽  
Nickel Oxide ◽  
Leaf Extract ◽  
Diffusion Method ◽  
Oxide Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
X Ray ◽  
Suaeda Maritima ◽  
Ft Ir ◽  
Uv Visible

A unique way, green, cost-effective, and direct fabrication method is proposed for the synthesis of Nickel Oxide Nanoparticles (NPs) in an eco-environmentally way through leaf extract of Suaeda maritima (L.) Dumort. The nickel oxide nanoparticles were synthesized using Nickel (II) nitrate hexahydrate as a metal source and aqueous leaf extract of S. maritima was utilized as a green reducing agent. The formation of NPs was monitored by the change in color in the reaction mixture and the synthesized NPs were characterized using UV-visible spectrophotometer, Fourier Transform infrared (FT-IR) spectroscopy, field emission scanning electron microscope (FE SEM), X-ray diffractometer (XRD), and energy-dispersive X-ray spectroscopy (EDX). Further, the antibacterial activity of synthesized NPs was carried using the agar plate well diffusion method and antioxidant activity by DPPH free radical scavenging activity of the NPs was studied. The UV-visible absorption spectra of nanoparticles show a characteristic maximum absorption peak centered at 397 nm. The functional group analysis by FT-IR confirms the presence of various bio-active functional groups in the synthesized particles. The structural characterization confirms that the particles were Face Centred Cubic lattice structure having IR-regular in shape and rough surface with average atomic weight percentages of 76.3%. The synthesized nanoparticles were found to be potent against the growth of gram-positive (Bacillus subtilis, Staphylococcus aureus) and gram-negative (Escherichia coli, Pseudomonas aeruginosa) bacteria. In the DPPH assay, the IC 50 values of the synthesized NPs were found to be 28.01 μg/mL which is very close to standard ascorbic acid (22.19 μg/mL) whereas the IC 50 of the aqueous plant leaf extract was found to be 47.30 μg/m confirms that the nanoparticles having enhanced antioxidant activity. From the results of the study it can be concluded that this protocol is simple, rapid, one step, eco-friendly, non-toxic for the synthesis of nickel nanoparticles.

Microwave-assisted and liquid oxidation combination techniques for the preparation of nickel oxide nanoparticles

2008 ◽  
Vol 450 (1-2) ◽  
pp. 318-322 ◽  
Author(s):  
Teh-Long Lai ◽  
Youn-Yuen Shu ◽  
Gim-Lin Huang ◽  
Chia-Chan Lee ◽  
Chen-Bin Wang
Keyword(s):  
Nickel Oxide ◽  
Oxide Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Microwave Assisted
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