Abstract
We demonstrate here that single-crystalβ-Ni(OH)2 nanosheets can be selectively synthesized in large quantities through a facile hydrothermalsynthetic method using aqueous nickel nitrate as the nickel source and sodium hydroxide asalkaline reagent. This attempt is based on the treatment of aqueous nickel nitrate with highconcentrations of sodium hydroxide solution under hydrothermal condition. Single-crystalNiO nanorolls can be obtained via a thermal decomposition method using single-crystalβ-Ni(OH)2 nanosheets as the precursor. The influences of alkaline concentration and reactiontemperature are carefully investigated in this paper. The morphologies and phasestructures of the as-prepared products are investigated in detail by x-ray diffraction(XRD), transmission electron microscopy (TEM), and selected area electron diffraction(SAED). The probable formation mechanism of the NiO nanorolls is proposed on the basisof the experimental results.
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