▎ 摘　　要

Graphene-like cobalt-nickel double hydroxide nanocomposites have been successfully prepared by a mild hydrolysis process at the room temperature. The samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and thermal gravimetric analysis. The results reveal that the as-prepared samples are composed of alpha-Co(OH)(2) and alpha-Ni(OH)(2), and contain numerous thin flakes with wrinkle structure, and the thickness of the flakes is ca. 1 nm. Magnetic measurements indicate that the as-prepared nanocomposites have a weak ferromagnetic behavior at the room temperature, which is due to a small content of metallic Co. The as-synthesized products emerge large specific surface area (260.1 m(2) g(-1)) from the measurement of Brunauer-Emmett-Teller. Interestingly, compared to single components, the obtained nanocomposites have exhibited superiorly and enhanced catalytic activity to the hydrogenation of p-nitrophenol in the presence of excess sodium borohydride at room temperature. In addition, the adsorption property of the nanocomposites for methyl blue has also been examined.