Hierarchical β-Ni(OH)₂ and NiO Carnations Assembled from Nanosheet Building Blocks

Abstract

β-Ni(OH)2 carnationlike structures assembled from nanosheet building blocks were successfully synthesized via a hydrothermal method through the hydrolysis of nickel acetate in mixed solvents of water and glycerol. NiO carnations assembled from nanosheets with nanopores were obtained by thermal decomposition of the as-synthesized carnationlike β-Ni(OH)2 at 400 °C for 2 h in air. The as-obtained β-Ni(OH)2 carnations showed a different cyclic voltammogram (CV) curve from that of β-Ni(OH)2 nanosheets.