Optimization Study on Formation and Decomposition of Zinc Hydroxynitrates to Pure Zinc Oxide Nanoparticles in Supercritical Water

2013 ◽  
Vol 52 (4) ◽  
pp. 1448-1454 ◽  
Author(s):  
Seyed Javad Ahmadi ◽  
Morteza Hosseinpour ◽  
Farzad Javadi ◽  
Reza Tayebee
Keyword(s):  
Zinc Oxide ◽  
Supercritical Water ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Pure Zinc ◽  
Optimization Study

SERS activity and spectroscopic properties of Zn and ZnO nanostructures obtained by electrochemical and green chemistry methods for applications in biology and medicine

2020 ◽  
Vol 22 (48) ◽  
pp. 28100-28114
Author(s):  
Edyta Proniewicz ◽  
Agnieszka Tąta ◽  
Anna Wójcik ◽  
Maria Starowicz ◽  
Joanna Pacek ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Green Chemistry ◽  
Zinc Oxide Nanoparticles ◽  
Spectroscopic Properties ◽  
Body Fluids ◽  
Oxide Nanoparticles ◽  
Selective Detection ◽  
Zno Nanostructures ◽  
Pure Zinc

This work evaluates the ability of homogeneous, stable, and pure zinc oxide nanoparticles (ZnONPs-GS) synthesized by “green chemistry” for the selective detection of four neurotransmitters present in body fluids and promotion of the SERS effect.

Continuous synthesis of zinc oxide nanoparticles in supercritical water

2003 ◽  
Vol 5 (5) ◽  
pp. 659 ◽  
Author(s):  
Kiwamu Sue ◽  
Kenji Murata ◽  
Kazuhito Kimura ◽  
Kunio Arai
Keyword(s):  
Zinc Oxide ◽  
Supercritical Water ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Continuous Synthesis

scholarly journals Leonotis Nepetifolia Mediated Eco-Friendly Synthesis of Zno Nps: Photocatalytic, Antioxidant Activities and Their Applications to Nano-Composite Electrode Material for Supercapacitor

2021 ◽  
Author(s):  
Gajendran Pavithra ◽  
Santhakumar kannappan
Keyword(s):  
Electron Microscopy ◽  
Zinc Oxide ◽  
Zno Nanoparticles ◽  
Zinc Oxide Nanoparticles ◽  
Antioxidant Activities ◽  
Electrochemical Analysis ◽  
Oxide Nanoparticles ◽  
Zno Nps ◽  
Pure Zinc ◽  
X Ray

Abstract The present paper describes the green synthesis of Zinc oxide nanoparticles (ZnO NPs) from the flowers of L. nepetifolia. The synthesis of ZnO nanoparticles and examined by using Ultraviolet-visible spectroscopy, Fourier Transform-Infrared spectroscopy, X-ray Diffraction analysis, Dynamic Light Scattering analysis, Raman spectroscopy, Scanning Electron Microscopy and Energy Dispersive X-ray spectroscopy, Transmission Electron Microscopy, and Thermogravimetric Analysis. The photocatalytic studies were followed using methylene blue (MB) dye by ZnO nanoparticles by using sunlight as a source. The degradation of MB dye is found to be 90 %. Then the synthesized ZnO nanoparticles help to evaluate the antioxidant activities. The antioxidant activities of ZnO nanoparticles were exhibiting through scavenging of Nitric oxide, Hydrogen peroxide, and DPPH free radicals. Furthermore, the electrochemical analysis of reduced Graphene Oxide-Zinc oxide (rGO-ZnO) nanocomposite shows that the prepared rGO-ZnO nanocomposite has a high specific capacitance of about 667 F g-1 in comparison with the pure Zinc oxide nanoparticles (200 F g-1) and has good cycling stability of around 1000 cycles. The synthesis of multifunctional ZnO nanoparticles by using natural plant products like seeds, leaves, flowers, etc may help to explore as environment-friendly which is opposite to chemical synthesis.

Structural and Thermal Diffusivity of Sm3+ Doped Willemite Glass Ceramics System from Waste Materials

2017 ◽  
Vol 268 ◽  
pp. 117-123
Author(s):  
I.A. Auwalu ◽  
Mohamed Kamari Halimah ◽  
A.W. Zaidan ◽  
K.T. Chan ◽  
U. Abdullahi
Keyword(s):  
Zinc Oxide ◽  
Thermal Diffusivity ◽  
Zinc Oxide Nanoparticles ◽  
Dopant Concentration ◽  
Glass Ceramics ◽  
Waste Materials ◽  
Zinc Silicate ◽  
Oxide Nanoparticles ◽  
Pure Zinc ◽  
State Technique

This study presents the formation of the zinc silicate from amorphous silica obtained from waste rice ash, with the addition of zinc oxide nanoparticles by conventional solid-state technique. The XRD showed the sharp intensive and small peaks while FTIR results indicated very slight variations in their peaks with the increased of samarium dopant concentrations. The FESEM clearly showed the cracks of zinc silicate doped with samarium the samples. The least thermal diffusivity values from 0.2039 to 0.1392 mm2/s acquired by pure zinc silicate (willemite) sintered at 1000°C. The thermal diffusivity was increasing with dopant concentration and decreasing with the rise in temperature (27-500°C). The thermal diffusivity curves revealed the exponential decay with the pores and cracks in the samples.

Optical Characteristics of Zinc Oxide Nanoparticles with Surface Modification Using Polyethylene Glycol

2014 ◽  
Vol 29 (10) ◽  
pp. 1039
Author(s):  
TAN Man-Lin ◽  
WANG Yan-Tao ◽  
ZHANG Wei-Li ◽  
FU Dong-Ju ◽  
LI Dong-Shuang ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Surface Modification ◽  
Polyethylene Glycol ◽  
Zinc Oxide Nanoparticles ◽  
Optical Characteristics ◽  
Oxide Nanoparticles

A comparative study of the antibacterial activity of Quercus robur (Ethanolic extract) and Zinc oxide nanoparticles on Salmonella (In vitro)

2018 ◽  
Vol 9 (SPL1) ◽  
Author(s):  
Hams H. H. Alfattli ◽  
Ghufran Zuhair Jiber ◽  
Ghaidaa Gatea Abbass
Keyword(s):  
Zinc Oxide ◽  
Antibacterial Activity ◽  
Zinc Oxide Nanoparticles ◽  
Quercus Robur ◽  
Ethanolic Extract ◽  
Inhibitory Effect ◽  
Significant Inhibition ◽  
Oxide Nanoparticles ◽  
Inhibition Zones

This study which designed to evaluate the inhibitory effect of Ethanolic extract of (Quercusrobur) and Zinc oxide nanoparticles on the growth of one genus of enterobacteriacae (Salmonella). In vitro. For this purpose graduate concentrates for plant extract (50, 100, 200, 400 )mg/ml which prepared and compared with Zinc oxide nanoparticles of different concentration (2, 1, 0.5, 0.25) μg/ml,and examined. The result showed that the studied medicinal plant has antibacterial activity against this bacteria which used. The result showed that the plant has good activity in decrease the growth of this bacteria. The results of the study also showed that the nano-ZnO has very effective antibacterial action against the studied bacteria which was Salmonella,nanoparticles concentrations lead to increasing in the inhibition zones of tested bacterial growth. We also study the effect of three antibiotics Lomefloxacin (LOM), Ciprofloxacin (SIP) and Rifampin (RA) and the result showed,in a comparison within the tested bacteria,Salmonella had a significant inhibition increase in Lomefloxacin ; the ciprofloxacin showed effect on tested bacteria. However,Rifampin does not show any effect on tested bacteria.

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