Co-based ternary nanocomposites: synthesis and their superior performances for hydrogenation of p-nitrophenol and adsorption for methyl blue

A new kind of Co-based ternary nanocomposites has been obtained via one step without any additional surfactant at zero centigrade degree. Some experimental parameters play crucial roles in determining the morphologies and homogeneity of the final products, such as reaction temperature and the introduction of Na₂S₂O₃·5H₂O. The samples were characterized by XRD, SEM, TEM, UV–Vis, XPS, and BET. The result reveals that the as-prepared samples are Co_1.29Ni_1.71O₄–Co₃S₄–Co₃O₄ Co-based ternary nanocomposites with an elliptic morphology composed of numerous fold-shaped superthin films (average thickness of ca. 2 nm). Interestingly, the obtained nanocomposites display superior performance for the hydrogenation of p-nitrophenol at room temperature in the presence of NaBH₄. More importantly, the as-prepared nanocomposites show the huge adsorption capacity for methyl blue at room temperature, reaches 1100 mg g⁻¹.

A kind of new-type Co-based ternary nanocomposites has been obtained via one step without surfactants at zero centigrade degree. The as-prepared nanocomposites display superior performance for the hydrogenation of p-nitrophenol in the presence of NaBH₄ at room temperature.