Preparation of three-dimensional flower-like Ni(OH) 2 nanostructures by a facile template-free solution process

• Published in: Journal of alloys and compounds 2010-04, Vol.496 (1), p.300-305
• Main Authors: Li, Q.Y., Wang, R.N., Nie, Z.R., Wei, Q., Wang, Z.H.
• Format: Article
• Language: English
• Subjects: Chemical synthesis methods; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Flower-like; Materials science; Methods of nanofabrication; Nanoflakelet; Nanopowders; Nanoscale materials and structures: fabrication and characterization; Ni(OH) 2; Physics; Three-dimensional nanostructure
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2010.02.001

Three-dimensional (3D) flower-like Ni(OH) 2 nanostructures have been successfully synthesized by a facile template-free solution process, in which F − and NH 3 were used as Ni 2+ coordination agents, and ammonia hydroxide solution was used as OH − supplier to accelerate the hydrolyzation of nickel complex species. The flower-like Ni(OH) 2 nanostructures consisted of many intercrossed nanoflakelets with a mixed crystal structure of α- and β-Ni(OH) 2. The F − and NH 3 in reactive solutions played important roles in the nanostructure growth process. The Ni(II) concentration had great influence on the morphologies of Ni(OH) 2 nanostructures. The possible growth mechanisms including aggregation growth, surface growth and surface dissolution were also proposed. The magnetization measurement indicated that the flower-like Ni(OH) 2 nanostructures exhibited paramagnetic behavior above the critical temperature (10 K) and ferromagnetic behavior below the critical temperature.