Controlled electrodeposition of iron oxide/nickel oxide@Ni for the investigation of the effects of stoichiometry and particle size on energy storage and water splitting applications

2018 ◽  
Vol 6 (20) ◽  
pp. 9657-9664 ◽  
Author(s):  
Sanjit Saha ◽  
J. Sharath Kumar ◽  
Naresh Chandra Murmu ◽  
Pranab Samanta ◽  
Tapas Kuila
Keyword(s):  
Particle Size ◽  
Energy Storage ◽  
Iron Oxide ◽  
Nickel Oxide ◽  
Water Splitting ◽  
Reaction Medium ◽  
Controlled Synthesis ◽  
Particle Sizes ◽  
Nickel Iron

Controlled synthesis of nickel/iron multimetal oxides with different stoichiometry and particle sizes was carried out by varying the pH of the reaction medium.

Influence of Particle Size and Thickness of Material on Anti-voltage Strength of Energy-storage Composite

2006 ◽  
Vol 949 ◽  
Author(s):  
Dabing Luo ◽  
Yan Guo ◽  
Hao Hua ◽  
Hanxing Liu ◽  
Shixi Ouyang
Keyword(s):  
Particle Size ◽  
Energy Storage ◽  
Particle Sizes ◽  
Energy Storage Density ◽  
Storage Density ◽  
Particle Dimension

ABSTRACTAfter combining the PVDF and BST powders with different particle sizes, the anti-voltage strengths of composites was tested. Although the concentrates of ceramic were all the same, their anti-voltage strengths were distinguished. The results showed that the bigger particles or less thickness of material could benefit to the anti-voltage strength and ultimately enhanced the energy storage density of composites. Moreover, the distribution of particle dimension also influenced the strengths of materials. Composite with homogeneous particles performed higher strength than that of composites with inhomogeneous particles.

Iron oxide promoted nickel/nickel oxide rough nanorods for efficient urea assisted water splitting

2020 ◽  
Vol 353 ◽  
pp. 136516 ◽  
Author(s):  
Xiaocong Gu ◽  
Dawen Yang ◽  
Zong Liu ◽  
Shuli Wang ◽  
Ligang Feng
Keyword(s):  
Iron Oxide ◽  
Nickel Oxide ◽  
Water Splitting

Production of iron oxide and nickel oxide nanostructural particles, investigation of the supercapacitor and photocatalytic properties

2019 ◽  
Vol 234 (11-12) ◽  
pp. 725-731 ◽  
Author(s):  
Süleyman Kerli ◽  
Ali Kemal Soğuksu
Keyword(s):  
Iron Oxide ◽  
Nickel Oxide ◽  
Xenon Lamp ◽  
Impedance Spectra ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Nickel Iron ◽  
Nanostructured Particles ◽  
Crystal Properties ◽  
Photocatalytic Activities

AbstractIn this study, iron oxide, nickel oxide, and nickel-iron oxide nanostructured particles were produced by the hydrothermal method. X-ray diffraction (XRD) and SEM measurements were performed to investigate the physical properties of these nanostructured particles. According to the XRD results, the crystal properties of these particles were determined. From the SEM images, these particles understood to be nano-structured. The electrodes were examined for electrochemical properties by using these nanostructured particles. Electrochemical measurements of the produced electrodes were performed, and capacitance values and impedance spectra of the electrodes were determined. The specific capacitance values of the iron oxide, nickel-iron oxide, and nickel oxide nanostructured particles, respectively are 30 F/g, 55 F/g, and 67 F/g. Also, the photocatalytic activities of nanostructured particles were investigated. This examination methylene blue (MB) was used and made under a xenon lamp. In light of our findings, it was observed that high photocatalytic degradation rate. Nickel-iron oxide nanostructured particles, the degradation of MB were found to be about 87%.

scholarly journals Investigations on the Modifications in Ignition Delay Time of Shellac-based Pyrotechnic Igniter using Additives of Varying Particle Size

2020 ◽  
Author(s):  
Lakshay Bansal ◽  
Prakhar Jindal ◽  
Manish Kumar Bharti
Keyword(s):  
Particle Size ◽  
Activated Carbon ◽  
Iron Oxide ◽  
Ignition Delay ◽  
Delay Time ◽  
Base Composition ◽  
Ignition Delay Time ◽  
Particle Sizes ◽  
Opposite Trend ◽  
Pyrotechnic Compositions

Modifications achieved in the ignition delay time of shellac-based pyrotechnic igniter using different additives of varying particle size are observed and compared. 40 different pyrotechnic compositions were prepared using five additives i.e. aluminium, magnesium, red iron oxide, naphthalene and activated carbon. Four particle sizes i.e. <75 µm, 75-150 µm, 150-300 µm, 300-600 µm and two weight percentages of the additives i.e. 3% and 5% were investigated. A base composition, without any additive, was also prepared to compare and investigate the effects of additives and their particle size on the ignition delay time of the composition. The incorporation of additives significantly reduced the ignition delay time of the base composition. Addition of 5% red iron oxide having a particle size of <75 µm, delivered the maximum decrement in ignition delay time i.e. by 49.7%. Naphthalene of particle size of <75 µm added as 3% in the composition weight, provided the minimum reduction in the ignition delay time i.e. by 13.7%. It was also observed that all of the additives exhibited a similar manner of decrement in ignition delay time as the particle size decreased, except for naphthalene which exhibited an opposite trend.

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.

scholarly journals Surface Modification of PES Hollow Fiber Membranes using Iron Oxide Particles for Water Treatment Does Particle Size Really Matter?

2021 ◽  
Vol 17 (5) ◽  
pp. 621-635
Author(s):  
Nadiene Salleha Mohd Nawi ◽  
Lau Woei Jye ◽  
Norhaniza Yusof ◽  
Noresah Said ◽  
Ahmad Fauzi Ismail
Keyword(s):  
Particle Size ◽  
Surface Modification ◽  
Iron Oxide ◽  
Water Treatment ◽  
Polymeric Membranes ◽  
Particle Sizes ◽  
Particle Type ◽  
Iron Oxide Particles ◽  
Oxide Particles

Factors such as particle type and its loading have been previously studied in tailoring the efficiency of particles-modified polymeric membranes for water treatment. However, the role of particle sizes in membrane modification is often overlooked. 

Highly Active Ternary Nickel–Iron oxide as Bifunctional Catalyst for Electrochemical Water Splitting

2019 ◽  
Vol 4 (27) ◽  
pp. 7791-7796 ◽  
Author(s):  
Namita Dalai ◽  
Bishnupad Mohanty ◽  
Arijit Mitra ◽  
Bijayalaxmi Jena
Keyword(s):  
Iron Oxide ◽  
Water Splitting ◽  
Bifunctional Catalyst ◽  
Nickel Iron ◽  
Highly Active ◽  
Electrochemical Water Splitting

Surface energy of cellulosic materials: The effect of particle morphology, particle size, and hydroxyl number

TAPPI Journal ◽  
2015 ◽  
Vol 14 (9) ◽  
pp. 565-576 ◽  
Author(s):  
YUCHENG PENG ◽  
DOUGLAS J. GARDNER
Keyword(s):  
Particle Size ◽  
Surface Energy ◽  
Particle Morphology ◽  
Nanofibrillated Cellulose ◽  
Particle Sizes ◽  
Hydroxyl Number ◽  
Small Individual ◽  
Dispersion Component ◽  
Commercial Applications ◽  
Lower Temperature

Understanding the surface properties of cellulose materials is important for proper commercial applications. The effect of particle size, particle morphology, and hydroxyl number on the surface energy of three microcrystalline cellulose (MCC) preparations and one nanofibrillated cellulose (NFC) preparation were investigated using inverse gas chromatography at column temperatures ranging from 30ºC to 60ºC. The mean particle sizes for the three MCC samples and the NFC sample were 120.1, 62.3, 13.9, and 9.3 μm. The corresponding dispersion components of surface energy at 30°C were 55.7 ± 0.1, 59.7 ± 1.3, 71.7 ± 1.0, and 57.4 ± 0.3 mJ/m2. MCC samples are agglomerates of small individual cellulose particles. The different particle sizes and morphologies of the three MCC samples resulted in various hydroxyl numbers, which in turn affected their dispersion component of surface energy. Cellulose samples exhibiting a higher hydroxyl number have a higher dispersion component of surface energy. The dispersion component of surface energy of all the cellulose samples decreased linearly with increasing temperature. MCC samples with larger agglomerates had a lower temperature coefficient of dispersion component of surface energy.

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