Enhanced enrichment performance of nickel oxide nanoparticles via fabrication of a nanocomposite with a graphene template

RSC Advances ◽  
2015 ◽  
Vol 5 (30) ◽  
pp. 23658-23665 ◽  
Author(s):  
Batool Fatima ◽  
Fahmida Jabeen ◽  
Zahra Padashbarmchi ◽  
Muhammad Najam-ul-Haq
Keyword(s):  
Nickel Oxide ◽  
Surface Area ◽  
Oxide Nanoparticles ◽  
Nickel Oxide Nanoparticles

Using graphene as a template after modification with nickel oxide, a nanocomposite with an increased surface area is fabricated and applied to phosphopeptides.

Thermal Conductivity of Nickel Oxide Nanoparticles Synthesized by Combustion Method

2010 ◽  
Vol 1256 ◽  
Author(s):  
Pranati Sahoo ◽  
Dinesh Misra ◽  
Girija Shankar Chaubey ◽  
James Salvador ◽  
Nathan J. Takas ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Nickel Oxide ◽  
Surface Area ◽  
Reaction Temperature ◽  
Synthesis Method ◽  
Solution Combustion Synthesis ◽  
Bet Surface Area ◽  
Oxide Nanoparticles ◽  
Solution Combustion ◽  
Nickel Oxide Nanoparticles

AbstractMonodispersed nickel oxide nanoparticles have been synthesized using solution combustion synthesis method. Size of the nanoparticles was controlled by varying different reaction parameters such as reaction temperature and reaction time. Structure and morphology of the nanoparticles were investigated using X-ray diffraction and transmission electron microscopy. BET surface area of 99.7 m2/g was obtained for the nanoparticles synthesized at 300 °C. A decrease in surface area was observed with increase in reaction temperature. The nanoparticles were compacted using spark plasma sintering technique at 950 °C and thermal conductivity was studied on compacted sample. Significant decrease in thermal conductivity was observed for nanoparticles in compared to their bulk counter-part.

scholarly journals Phytochemical-Assisted Green Synthesis of Nickel Oxide Nanoparticles for Application as Electrocatalysts in Oxygen Evolution Reaction

Catalysts ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1523
Author(s):  
Vidhya Selvanathan ◽  
M. Shahinuzzaman ◽  
Shankary Selvanathan ◽  
Dilip Kumar Sarkar ◽  
Norah Algethami ◽  
...  
Keyword(s):  
Particle Size ◽  
Nickel Oxide ◽  
Green Synthesis ◽  
Surface Area ◽  
Water Splitting ◽  
Aloe Vera ◽  
Oxide Nanoparticles ◽  
Average Particle ◽  
Nickel Oxide Nanoparticles ◽  
Peel Extract

Electrocatalytic water splitting is a promising solution to resolve the global energy crisis. Tuning the morphology and particle size is a crucial aspect in designing a highly efficient nanomaterials-based electrocatalyst for water splitting. Herein, green synthesis of nickel oxide nanoparticles using phytochemicals from three different sources was employed to synthesize nickel oxide nanoparticles (NiOx NPs). Nickel (II) acetate tetrahydrate was reacted in presence of aloe vera leaves extract, papaya peel extract and dragon fruit peel extract, respectively, and the physicochemical properties of the biosynthesized NPs were compared to sodium hydroxide (NaOH)-mediated NiOx. Based on the average particle size calculation from Scherrer’s equation, using X-ray diffractograms and field-emission scanning electron microscope analysis revealed that all three biosynthesized NiOx NPs have smaller particle size than that synthesized using the base. Aloe-vera-mediated NiOx NPs exhibited the best electrocatalytic performance with an overpotential of 413 mV at 10 mA cm−2 and a Tafel slope of 95 mV dec−1. Electrochemical surface area (ECSA) measurement and electrochemical impedance spectroscopic analysis verified that the high surface area, efficient charge-transfer kinetics and higher conductivity of aloe-vera-mediated NiOx NPs contribute to its low overpotential values.

TOXIC EFFECTS ASSESSMENT OF NICKEL OXIDE NANOPARTICLES BY INHALATION

2018 ◽  
pp. 24-29 ◽  
Author(s):  
B.A. Katsnelson ◽  
M.P. Sutunkova ◽  
L.I. Privalova ◽  
S.N. Solovjeva ◽  
V.B. Gurvich ◽  
...  
Keyword(s):  
Nickel Oxide ◽  
Redox Balance ◽  
Systemic Toxicity ◽  
Laboratory Animals ◽  
Oxide Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
White Rats ◽  
Liver And Kidney ◽  
Stimulation Of Erythropoiesis ◽  
Nio Nps

The article presents in an experiment obtained principal results based on repeated low-level inhalation exposures of laboratory animals (white rats, outbred) to nickel oxide nanoparticles with a diameter of (23 ± 5) nm, 4 hours a day, 5 times a week for up to 10 months in a «nose only» installation. It was shown that non-specific body reactions to the action of NiO NPs include: diverse manifestations of systemic toxicity with a particularly pronounced influence on liver and kidney function, redox balance, damage to some areas of brain tissue, associated with proven movement of the nanoparticles themselves from the nasal mucosa along the olfactory tract; some cytological signs of probable development for allergic syndrome; paradoxically low severity of pulmonary pathology by pneumoconiotic type explained by a small chronic delay of nanoparticles in the lungs; the genotoxic effect of the organismal level, even at those low levels of chronic exposure, at which systemic toxicity is rather poorly. Along with that, NiO NPs also induce phase-stimulation of erythropoiesis, which is relatively specific for the toxic nickel effects.

scholarly journals The inhibitory role of synthesized Nickel oxide nanoparticles against Hep-G2, MCF-7, and HT-29 cell lines: the inhibitory role of NiO NPs against Hep-G2, MCF-7, and HT-29 cell lines

2021 ◽  
Vol 14 (3) ◽  
pp. 443-453
Author(s):  
Mohammad Amin Jadidi Kouhbanani ◽  
Yasin Sadeghipour ◽  
Mina Sarani ◽  
Erfan Sefidgar ◽  
Saba Ilkhani ◽  
...  
Keyword(s):  
Nickel Oxide ◽  
Cell Lines ◽  
Oxide Nanoparticles ◽  
Hep G2 ◽  
Nickel Oxide Nanoparticles ◽  
Inhibitory Role ◽  
Nio Nps ◽  
Ht 29 ◽  
Mcf 7

Nickel oxide nanoparticles induce genotoxicity and cellular alterations in the ground beetle Blaps polycresta (Coleoptera: Tenebrionidae)

2021 ◽  
pp. 074823372110009
Author(s):  
Dalia Abdel Moneim Kheirallah ◽  
Awatef Mohamed Ali ◽  
Salah Eldein Osman ◽  
Amal Mohamed Shouman
Keyword(s):  
Nickel Oxide ◽  
Structural Changes ◽  
Ground Beetle ◽  
Biological Tissues ◽  
Treated Group ◽  
Sublethal Dose ◽  
Oxide Nanoparticles ◽  
Nickel Oxide Nanoparticles ◽  
Nio Nps ◽  
The Impact

Nickel nanoparticles (Ni-NPs) have advantageous applications in the industry; however, little is known of their adverse effects on biological tissues. In the present study, the ground beetle Blaps polycresta was employed as a sensitive indicator for nickel oxide nanoparticles (NiO-NPs) toxicity. Adult male beetles were injected with six dose levels of NiO-NPs (0.01, 0.02, 0.03, 0.04, 0.05, and 0.06 mg/g body weight). Mortality was reported daily over 30 days under laboratory conditions to establish an LD50. Nickel was detected in the testicular tissues of the beetles using X-ray analysis and transmission electronic microscopy. Beetles treated with the sublethal dose of 0.02 mg/g were selected to observe molecular, cellular, and subcellular changes. Gene transcripts of HSP70, HSP90, and MT1 were found to be increased >2.5-, 1.5-, and 2-fold, respectively, in the treated group compared with the controls. Decreased gene expression of AcPC01, AcPC02, and AcPC04 (≤1.5-, ≤2-, and < 2.5-fold, respectively, vs. controls) also were reported in the treated group. Under light microscopy, various structural changes were observed in the testicular tissues of the treated beetles. Ultrastructure observations using scanning and transmission electron microscopy showed severe damage to the subcellular organelles as well as deformities of the heads and flagella of the spermatozoa. Therefore, the present study postulated the impact of NiO-NPs in an ecological model.

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