Synthesis Of Nickel Nanoparticles Research Articles

Preparation of an inclusion complex of nickel-based β-cyclodextrin: Characterization and accelerating the osteoarthritis articular cartilage repair

Abstract Osteoarthritis is caused by the cartilage destruction of the bones of the joint surfaces and structures that produce synovium fluid. Osteoarthritis treatment includes the use of surgical methods and non-surgical or maintenance treatments including knee orthoses, medical insoles with external edges, use of physiotherapy techniques, exercise, weight loss in obese people, and teaching the principles of joint care. The main goal of treatment in osteoarthritis of the knee is to ameliorate physical function, decrease pain, and reduce the progression of the disease, through correcting the knee alignment and reducing the varus torque. Previous studies have indicated that medicinal plants and herbal nanoparticles (NPs) have the best anti-inflammatory effects. β-Cyclodextrin is a cyclic carbohydrate molecule that is used as a host to prepare inclusion complexes. In this study, the synthesis of nickel NPs is based on β-cyclodextrin (NiBCD NPs) for accelerating the osteoarthritis articular cartilage repair. The FT-IR and XRD techniques confirmed the formula of NiO for the NiBCD NPs. The FE-SEM imaging shows a non-spherical structure for NiBCD NPs with a size of less than 100 nm. In EDX, the signals at the energy levels of 8.3, 7.5, and 0.87 keV are assigned for the electron migration of Ni Kβ, Ni Kα, and Ni Lα. Furthermore, the signals for the elements of oxygen and carbon of BCD appeared at 0.52 and 0.28 keV. The effectiveness of NiBCD NPs in promoting chondrogenesis was examined in orthopedic experiments using primary cultured chondrocytes. Subsequently, we determined the functional restoration following NiBCD NPs’ transplantation in a knee osteoarthritis articular cartilage injury model. We conducted histological, PCR, and Western blot assays. In the immunological analysis, the levels of MMPs, IL-1β, TNF-α, and p-p65 expression were found to be reduced by NiBCD NPs. This reduction may be attributed to the regulation of cellular redox homeostasis through Nrf2. Furthermore, our findings demonstrated the positive impact of NiBCD NPs on stimulating chondrogenesis in vitro. Notably, the NiBCD NPs’ application accelerated the recovery of injury-induced dysfunction. Additionally, the presence of NiBCD NPs at the injury site suppressed abnormal fibrosis and angiogenesis. The histological assay revealed the chondrocytes’ proliferation and increased cartilage matrix synthesis in the NiBCD NPs’ presence.

Application of nanoparticles to increase biological hydrogen production: the difference in metabolic pathways in batch and continuous reactors

An alternative to improve the production of biorefinery products, such as biohydrogen (H2) and volatile fatty acids (VFA), is the combination of nanotechnology and biological processes. In order to compare the use of both processes in two different reactor configurations, batch reactors and continuous anaerobic fluidized bed reactors (AFBR) were studied under the same conditions (37 °C, pH 6.8, Clostridium butyricum as inoculum and glucose as substrate) to evaluate the influence of zero valence iron and nickel nanoparticles (NPs) on H2 and VFA production. There was a shift in the production of acetic and butyric acids to produce mainly valeric acid when NPs were added in batch reactors. Meanwhile, in AFBR the change was from lactic acid to butyric and acetic acids with the addition of NPs. It showed that the effect of NPs on the fermentation process was different when the configuration of batch and continuous reactors was compared. The H2 yield in both reactor configurations increased with the addition of NPs. In batch reactors from 6.6 to 8.0 mmol H2 g-1 of COD, and in AFBR from 4.9 to 6.2 mmol of H2 g-1 of COD. Therefore, given the simplicity and low cost of the synthesis of metallic NPs, it is a promising additive to optimize the fermentation process in different reactor configurations.

Synthesis of nickel nanoparticles by pulsed laser ablation in different liquid media

Nickel nanoparticles exhibit superior ferromagnetic properties. This has attracted great interest due to its significant potential applications in various fields. The properties of nanomaterials are greatly affected by the environmental conditions during the synthetization process. In this work, nickel nanoparticles were synthesized by pulsed laser ablation in distilled water, ethylene glycol, chitosan, gum Arabic and walnut oil. For all samples, the ablated process was conducted for 5 minutes. The optical properties of colloidal nanoparticles were investigated by UV-Visible spectroscopy and Fourier Transform Infrared (FT-IR) spectrometer. Data from experimental works released that walnut oil has highest absorbance intensity which might be contributed to the existence of alkene functional group.

The effect of pH on X-ray-radiolysis-induced synthesis of nickel nanoparticles on lithium niobate substrates

Photochemical reactions in aqueous media induced by X-ray irradiation have been shown to enable the synthesis of functional structures ranging from nanometer to millimeter scales. Herein, we demonstrate the synthesis and immobilization of nanoscale/microscale Ni particles onto lithium niobate (LiNbO3) substrates directly by X-ray irradiation of nickel sulfate (NiSO4) solutions with pHs from 1 to 9 using a synchrotron radiation facility. We found that the size and composition of the synthesized particles strongly depends on the pH of the solution; as pH increases, oxidation is accelerated and particle size increases. The synthesized particles exhibit magnetic hysteresis and are found to have ferromagnetic properties. Our investigation reveals that pH regulation is essential for controlling the synthesis of particles and providing characteristic functionalities to the materials. The X-ray radiolysis technique enables a state-of-the-art nanoscale/microscale three-dimensional manufacturing process that can create functional structures comprising composite constituents such as metallic and plastic materials.

Synthesis of Nickel Nanoparticles by Using Collagen Extract of Emperor Fish Waste and Biological Applications

The biosynthesis method of nanoparticles is a alternative, inexpensive and eco-friendly as compared to physical and chemical methods. The aim of this work is the biosynthesis of Nickel nanoparticles from collagen extract of emperor fish wastes such as bone, skin, scales. Fishes are the alternative sources of collagen and it is extracted by acid soluble soluble method (ASC). The green synthesized nickel nanoparticles from collagen extract were characterized by UV-Vis spectroscopy (UV-Vis), X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM). Keywords: Collagen, Fish waste, Acid soluble collagen extraction method (ACS)

Peumus Boldus Koch Özütü Kullanılarak Nikel Nanopartiküllerin Yeşil Sentezi ve Antibakteriyel Aktivitesi

Today, nano-systems, especially multi-functional inorganic nanoparticles, attract a lot of attention in the biomedical field. Nickel nanoparticles, known as inorganic nanoparticles in nanotechnology and known as metallic nanoparticles with an important place, show antibacterial properties. The fact that nickel nanoparticles find use in areas requiring human contact leads to nanoparticle synthesis with biological systems. Thus, more environmentally friendly structures emerge. In this study, nickel nanoparticles were synthesized for the first time by biosynthesis using Peumus boldus extract. Structural, chemical and morphological properties were examined by UV-vis, FTIR, XRD, and SEM methods. Extract obtained from Peumus boldus was used as reducing agent in the synthesis of nickel nanoparticles. In addition, the antibacterial activities of the obtained nickel nanoparticles were investigated against E. coli and S. aureus.

FORMATION OF NICKEL NANOPARTICLES IN SOLUTIONS OF A HYDROPHILIC GRAFT COPOLYMER

A graft copolymer of poly(vinyl alcohol) and polyacrylamide (PVA-g-PAAm) with interacting main and grafted chains was synthesized by radical matrix polymerization of PAAm from the PVA backbone in an aqueous medium. Its basic molecular parameters including the number and length (molecular weight) of grafts were determined using elemental analysis, DTGA and viscometry. The copolymer macromolecules formed special monomolecular micelles of elipsoidal shape and length ~18-64 nm in aqueous solutions due to the formation of intramolecular polycomplexes between the main and grafted chains. This copolymer was used as a hydrophilic matrix for the in situ synthesis of nickel nanoparticles (NiNPs) in aqueous solutions.On the basis of UV-Vis spectroscopy, an original and simple method for monitoring the kinetics of the formation and yield of metal nanoparticles in systems in which a surface plasmon resonance band does not appear has been proposed and implemented. Using this approach, the kinetics of borohydride reduction of Ni-salt to NiNPs in pure water and PVA-g-PAAm solutions was studied depending on the concentrations of Ni-salt and copolymer matrices. An increase in the initial rate of accumulation and yield of NiNPs with an increase in the concentration of Ni-salt and a decrease in both parameters in copolymer solutions in comparison with pure water was established. At the same time, the accumulation rate and NiNP yield in a complex way was depended on the matrix concentration that was determined by the ratio of such factors as a decrease in the diffusion rate of NaBH4 molecules in copolymer solutions and the accumulation of Ni2+-ions in matrix particles due to complexation with active chemical groups at the first stage of reduction process. The morphology and main structural elements of the NiNPs/PVA-g-PAAm composition were revealed using TEM. It was shown that the in situ synthesis of NiNPs in copolymer matrices was accompanied by the “detachment” of PAAm grafts from the main PVA chains and led to the appearance of two new structures, such as “hairy coils” and “hairy rods”, containing small spherical NiNPs (d~0,5–12,0 nm) in isolated and chain states, respectively. The appearance of the latter structures was explained by the formation of coordination complexes of Ni2+-ions with active groups of both PVA and PAAm chains at the first stage of the reduction reaction.

Electric discharge synthesis of nickel nanoparticles with virtual instrument control

Colloidal nickel nanoparticles were prepared by a top-down approach using an electric discharge. The method was improved by a computerized control unit implemented with virtual instrumentation. A controlled electric arc discharge between two nickel electrodes generates a plasma, which rapidly disintegrates the nickel to form nanoparticles in deionized water. Dynamic light scattering and scanning electron microscopy show synthesis of nickel nanoparticles with size distributions that depend on the discharge parameters.

Synthesis of nickel nanoparticles by a green and convenient method as a magnetic mirror with antibacterial activities

In this work, a simple protocol was described for the synthesis of nickel magnetic mirror nanoparticles (NMMNPs) including antibacterial activities. The identification of NMNPs was carried out by field-emission scanning electron microscopy (FESEM) images, energy-dispersive X-ray (EDX) analysis, X-ray diffraction (XRD) pattern, transmission electron microscopy (TEM) images and vibrating sample magnetometer (VSM) curve. The antibacterial activities are investigated against S. aureus and E. coli as the Gram-positive and Gram-negative bacteria, respectively. The UV–Vis absorption was also studied in the present of NMMNPs at different time intervals that disclosed decreasing of the bacterial concentration. More than 80% of the bacteria were disappeared after treating in the presence of NMMNPs for 18 h. The Ni-NPs revealed an excellent mirror attribute with a well-controlled transmission (7%). A better light-reflectivity over conventional glass or a mercury mirror proved their utility for domestic uses in comparison with conventional mirrors as rather toxic materials like mercury. Owing to its magnetic properties, this kind of mirror can be easily made onto glass by using an external magnet. An ordered crystalline structure, admissible magnetic properties, substantial antibacterial activities, tunable mirror properties, mild reaction conditions, and overall, the facile synthesis are the specific features of the present protocol for the possible uses of NMMNPs in diverse applications.

Synthesis of Nickel nanoparticles on graphene oxide as a promising reinforcement for epoxy composites

AbstractHerein, Nickel‐decorated graphene oxide nanoplatelets (Ni@GNs) were introduced as a promising reinforcement for epoxy composites. The morphology and structure of Ni@GNs were characterized by X‐ray diffraction, atomic force microscope, and scanning electron microscope equipped with an energy‐dispersive X‐ray analyzer. This study sought to investigate the effects of Ni@GNs addition at different weight percentages (0.05, 0.1, 0.3, 0.5, and 0.7 wt%) on the tensile and dry‐sliding wear properties of epoxy composites. Maximum enhancements in tensile strength (ie, 36%) and failure strain (ie, 56%) were observed for the specimen filled with 0.1 wt% Ni@GNs. In addition, by the introduction of 0.7 wt% Ni@GNs, a maximum enhancement of tensile modulus (ie, 39%) was achieved. The results of the wear tests demonstrated that the wear rate and friction coefficient of the epoxy matrix were decreased by 86% and 75%, respectively, by the addition of 0.3 wt% Ni@GNs. It was also found that the Ni@GNs/epoxy nanocomposite showed significant improvements in tensile and wear properties in comparison to the specimen filled with GNs.

Synthesis of Nanosized Nickel Particle from Spent Cathodic Material Containing Lithium

Due to the rapid development of electricity, electronics, information communication, and biotechnology in recent years, studies are actively being conducted on nanopowders as it is required not only for high strengthening but also for high-function powder with electric, magnetic, and optical properties. Nonetheless, studies on nickel nanopowders are rare. In this study of the synthesis of nickel nanoparticles from LiNiO2 (LNO), which is a cathode active material, we have synthesized the nanosized nickel powder by the liquid reduction process of NiSO4 obtained through the leaching and purification of LNO. Moreover, we have studied the reduction reaction rate according to the temperature change of liquid phase reduction and the change of particle size as a function of NaOH addition amount using hydrazine monohydrate (N2H4·H2O) and NaOH.

Synthesis of nickel nanoparticles by sol-gel method and their characterization

Synthesis of nickel nanoparticles by sol-gel method and their characterization

Synthesis of Nickel Nanoparticles with Controlled Pyrophoricity and Average Size

The nickel formate decomposition in an argon flow at 209°C with subsequent treatment of the obtained nanopowder in a hydrogen flow for a given time was shown to enable one to control the pyrophoricity and average size of Ni nanoparticles.

Ablated nickel nanoparticles: third harmonic generation and optical nonlinearities

We report the two-photon absorption and nonlinear refraction studies of the nickel nanoparticles (NPs) in deionized water using femtosecond laser pulses at 400 and 800 nm. The laser ablation technique was employed for the synthesis of nickel NPs using nanosecond, picosecond, and femtosecond pulses. The largest values of nonlinear absorption coefficients and nonlinear refractive indices were determined to be 9 × 10−11 cm W−1 and 2 × 10−15 cm2 W−1 for smaller sized nickel NPs suspension. Third harmonic generation from the Ni plasma which contained NPs was analyzed using picosecond and femtosecond pulses as heating radiation and femtosecond probe pulses.

Synthesis of nickel nanoparticles by pulse laser ablation method using Nd:YAG laser

Nickel nanoparticles have interesting future prospect in various fields such as sensors, catalysts, and medical applications. The synthesis of nickel nanoparticles (NiNPs) using the pulse laser ablation method has been successfully performed by using low laser energy Neodymium Yttrium Aluminum Garnet (Nd:YAG). A high-purity nickel plate was immersed in 10 ml deionized water in a petri dish and a pulsed Nd:YAG laser (1064 nm, 30 mJ, 15 Hz) was then irradiated on the nickel surface for 20 minutes. Light grey color of colloidal NiNPs were successfully synthesized. The morphology of NiNPs shows that the spherical shape of NiNPs was produced with an average diameter of 25 nm and standard deviation of 3 nm. The surface plasma resonance was around 290 nm.

Synthesis of Nickel Nanoparticles by the Reduction of Its Salts Using the Modified Polyol Method in the Presence of Sodium Polyacrylates with Various Molecular Weights

Nickel nanoparticles were synthesized by the reduction of its salts by hydrazine hydrate in a polyol medium in the presence of sodium polyacrylates with molecular weights of 1200, 5100, and 8000. The nanoparticles were characterized by X-ray diffraction, scanning and transmission electron microscopy, IR spectroscopy, and thermogravimetric analysis. The effect of the synthesis conditions, such as temperature, molecular weight of sodium polyacrylate, and polyol and precursor types, on the reduction products were studied. It was shown that the average particle sizes, their aggregation and polydispersity degrees increase as the polymer molecular weight increases.

Room-temperature synthesis of nickel nanoparticles and their use as catalyst for methyl orange dye degradation

We demonstrate here a simple and versatile route to prepare nickel nanoparticles from nickel sulphate using a surfactant and sodium borohydride as the reductant. These active and ordered structures of nickel nanoparticles were found to be efficient catalysts for degradation of methyl orange in aqueous medium. The particles remaining in solution were found to possess excellent catalytic activity even after several recycling attempts and have little propensity to coalesce or aggregate into inactive bigger lumps. Size selectivity was found to be one major reason of catalytic reusability using metal nanoclusters for similar dye degradation under identical reaction conditions.

Synthesis of nickel nanoparticles via biological entity and their Anti- inflammatory activity

The present study described biosynthesis of nickel nanoparticles using a bacterial strain Alcaligenes faecalis. The synthesized nanoparticles were characterized by UV-visible, XRD, SEM and FT-IR spectral studies. Nanoparticles were tested for their anti-inflammatory property. Nickel nanoparticles exhibited 51.46 percentage inhibitions at concentration of 200 µg/ml. This biosynthesis is good source for green environment approach towards the synthesis of metal nanoparticles and has many advantages such as, comfort with which the process can be scaled up and economic feasibility.

Mechanistic Investigations of the Synthesis of Size‐Tunable Ni Nanoparticles by Reduction of Simple NiII Diamide Precursors

Herein, we present a detailed study of the conversion of a nickel(II) diamide precursor to size-tunable, monodisperse nickel nanoparticles (NPs). The thermal decomposition of nickel(II) dioleylamide, synthesized either independently or in situ, resulted in the formation of Ni NPs without the coproduction of water. Mechanistic studies were conducted on the stability and reduction pathway of the NiII precursor, and on the consequent particle formation. Variations in the ratio of trioctylphosine (TOP) to nickel allowed size tunability, which resulted in nanoparticles that ranged in size from 4 to 11 nm in diameter. The DFT calculations support a mechanistic pathway that involves nickel reduction by imine formation. This water-free method was extended to the synthesis of water-sensitive M0 NPs (M=Fe, Co).

In Situ, Fast, High‐Temperature Synthesis of Nickel Nanoparticles in Reduced Graphene Oxide Matrix

For the first time, a fast heating–cooling process is reported for the synthesis of carbon‐coated nickel (Ni) nanoparticles on a reduced graphene oxide (RGO) matrix (nano‐Ni@C/RGO) as a high‐performance H2O2 fuel catalyst. The Joule heating temperature can reach up to ≈2400 K and the heating time can be less than 0.1 s. Ni microparticles with an average diameter of 2 µm can be directly converted into nanoparticles with an average diameter of 75 nm. The Ni nanoparticles embedded in RGO are evaluated for electro‐oxidation performance as a H2O2 fuel in a direct peroxide–peroxide fuel cell, which exhibits an electro‐oxidation current density of 602 mA cm−2 at 0.2 V (vs Ag/AgCl), ≈150 times higher than the original Ni microparticles embedded in the RGO matrix (micro‐Ni/RGO). The high‐temperature, fast Joule heating process also leads to a 4–5 nm conformal carbon coating on the surface of the Ni nanoparticles, which anchors them to the RGO nanosheets and leads to an excellent catalytic stability. The newly developed nano‐Ni@C/RGO composites by Joule heating hold great promise for a range of emerging energy applications, including the advanced anode materials of fuel cells.