On the Preparation of Nickel Nanoparticles by Chemical Reduction Method: X-ray Absorption Spectroscopy

Abstract

Nickel nanoparticles were synthesized by the chemical reduction of NiCl2 with N2H4 under controlled pH environment. During nucleation, polyvinyl pyrrolidone (PVP) was added as the protective agents for preventing the agglomeration of metal clusters. Color of the solution changed from green to blue during the reaction period. X-Ray Adsorption Spectroscopy (XAS), X-Ray Diffraction (XRD), and Transmission Electron Microscopy (TEM) analytical methods were used to characterize the product. XAS analysis showed that the reduction reaction occurred within 5 minutes after the addition of N2H4. The length of Ni-Ni bond was 2.59 nm. The results of XRD analysis of the three cases with pH ranging from 11.0 to 13.0 suggest that the optimum pH value for the reaction appeared to be 12.0. The average particle size was 20-50 nm under this condition.

Adsorption Behavior of Magnetic Carbon-Supported Metal Nickel for the Efficient Dye Removal from Water

“…Wu et al [21] successfully synthesized spherical pure metal nickel nanoparticles by chemical reduction of nickel chloride with hydrazine at room temperature without any protective agent or inert gas, and the obtained nickel nanoparticles could be separated in solid state and stabilized in the atmosphere for several months. Chou et al [22] prepared nickel nanoparticles by chemical reduction method under a controlled pH environment and also characterized the product. Meshkani et al [23] prepared a series of nickel catalysts with different contents of supported mesoporous spherical SiO2 by sol-gel method, and the experimental results showed that the samples prepared with 55% nickel performed the best in the temperature and stability tests.…”

Acrylamide in starchy foods subjected to deep-frying, 20 years after its discovery (2002-2022): a patent review

“…These pre-treatments include drying, [66][67][68] blanching, 69,70 electric pulses, 71 electroporation, 72 and others. 3,[73][74][75][76][77][78][79][80] For example, inventors like Kim, Jeong 81 have patented the impregnation of amino acids such as arginine, valine, proline, sodium chloride, citric acid, and vitamin C, along with prior blanching and prefrying treatments, for the production of potato snacks. On the other hand, Boudreaux, Desai 82 focus on a method to leach acrylamide precursors using an extract deficient in the precursors, proposing the leaching of asparagine and untreated potato starch with a potato extract lacking asparagine.…”

Highly-dispersed nickel nanoparticles decorated titanium dioxide nanotube array for enhanced solar light absorption

“…In Ni-NPs, the transitions of sp-electrons and partially filled d-bands (3d 8 ) contribute to enhanced absorption in a broader spectral region [20][21][22], which is desired for harvesting solar energy [23,24]. Although their light absorption capability is weaker than noble metal nanoparticles, Ni-NPs are a promising alternative for light absorption due to their low-cost as well as feasible and facile synthesis by various methods, including chemical reduction and electrodeposition [25,26].…”