Sol–gel preparation and characterization of NiCo and Ni3Fe nanoalloys

Preparation of nickel and Ni3Sn nanoparticles via extension of conventional citric acid and ethylene diamine tetraacetic acid mediated sol–gel method

“…CA and EDTA are popular chelating agents that can be applied to chelating with metallic ions, and these two chelating agents can also be operated to prepare Ni and Ni 3 Sn alloy nanoparticles. It seems that EDTA is more effective in controlling grain sizes of Ni nanoparticles than CA since broad diffraction peaks of 11 fcc Ni can be obtained by using EDTA with pH being equal to 8 while sharp diffraction peaks of fcc Ni emerge by using CA with pH equals to 8. However, EDTA can′t be used in organic solution because it doesn′t soluble in organic solvents.…”

“…Oxygen is believed to be originates from the surface oxidized layer of Ni and carbon originates from CA since the molar of metallic Ni 2+ : CA is 1:5. It is suggested that the excess amount of carbon acts as supporting media of nickel nanoparticles [11], as evidenced by the fact that the nanoparticles are dispersed in a supporting substance in Fig. 2 and 5.…”

“…Finally, black products were obtained and kept in a sample sack in a drying dish in air. It should be pointed out that the nanoparticles were supported by amorphous media main containing carbon [15] because the heating treatment should be carried out at temperature higher than 1073 K to eliminate carbon [14]. When nickel sulphate, nickel formate, nickel acetate, and nickel aminosulfonate were used, nickel nitrate was replaced by these nickel sources.…”

“…This work was supported by National Science Foundation of China (51201090), the Zijin Intelligent Programme of Nanjing University of Science and Technology, 15 and Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).…”

“…Metallic nanoparticles can also be obtained by CA mediated sol-gel method [9]. The CA mediated process can be performed in aqueous as well as organic solutions [10][11][12][13]. Since EDTA have been widely used in sol-gel method, it is still necessary to explore the possibility of preparation of metallic nanoparticles by applying EDTA.…”