Synthesis and Characterization of Nickel Particles by Hydrogen Reduction Assisted Ultrasonic Spray Pyrolysis(USP-HR) Method

Abstract

Spherical nickel particles were prepared by hydrogen reduction assisted ultrasonic spray pyrolysis (USP-HR) method using nickel chloride solution without any additives. Thermodynamic of the hydrogen reduction of the nickel chloride were studied by FactSage software. Particles were obtained at 800 reaction temperature by hydrogen reduction of aerosol droplets under H2 flow. The effects of the precursor concentration on the particle size and morphology were investigated by scanning electron microscopy. Results showed that nickel particle sizes were decreased from 630 to 270 nm by reducing solution concentration, and also narrower size distribution was obtained using lower concentrated precursor. Nickel particle sizes were theoretically calculated and results indicated that there was a slight difference in the particle sizes compared to experimental values.

Single-Step Production of Nanostructured Copper-Nickel (CuNi) and Copper-Nickel-Indium (CuNiIn) Alloy Particles

“…The main reason for the slightly variation of the average particle sizes is the sintering effect arising from temperature-residence time relation, as explained. The obtained particles were mainly in submicron size, and those are the aggregates of the primary nucleated nanosized particles, as also observed in the previous studies on production of metallic [43,45] and alloy [2,46] particles. The theoretically calculated particle size for CuNiIn alloy is 279 nm.…”

“…For the determination of the theoretical particle size, aerosol droplet size must be calculated by taking into account the frequency of ultrasonic atomizer, surface tension, and density of solution. [41][42][43] The aerosol droplet diameter was calculated as 2.92 lm for 1.7 MHz atomizer. Particle formation is the result of the reaction between aerosol droplets and reducing H 2(g) in the heated zone.…”

“…It is assumed that droplet is transformed into a dense particle, and no collision occurs between particles, droplets and each other. [41][42][43] According to the one droplet to one particle conversion mechanism, the calculated particle size for CuNi alloy is 279 nm, which is independent from the reaction temperature. The theoretical and experimental particle sizes slightly differ because of the densification amount of particles effecting from reaction temperatures [973 K, 1073 K, and 1173 K (700°C, 800°C, and 900°C)] and the residence time of aerosol/particles.…”

Preparation and electrochemical properties of nanocrystalline LiBxMn2−xO4 cathode particles for Li-ion batteries by ultrasonic spray pyrolysis method

“…In addition, a homogeneous composition of its products, easy controllability, and short production times are the additional advantages of this process [27][28][29][30][31]. Nanostructured electrodes for lithium batteries have some advantages compared to conventional electrodes due to the short diffusion path and higher electrode/electrolyte contact area that translates to higher charge/discharge rates [31][32][33].…”

Kinetics study of a palladium–nickel colloidal nanocatalyst synthesized by a wet-chemical method for reduction of nitrophenol, nitroaniline, and 4-nitrobenzo-15-crown compounds

“…In the case of nickel particles, the relation between the grain size of Ni nano-crystals and their magnetic properties has been studied in the past decade. The unique physical and chemical properties which providing an opportunity to use them in various practical applications such as catalysts, electrodes in electronic products, magnetic fluids and high density recording media (Ebin and Gurmen 2011).…”