Synthesis and characterization of ball-in-ball CuSCN hollow architecture

Ball-in-ball CuSCN hollow architecture is successfully synthesized by a facile one-pot aqueous solution method in the presence of poly(vinylpyrrolidone) at room temperature. The as-synthesized products are characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance absorption spectra (DRS) and nitrogen adsorption–desorption measurement. A possible formation mechanism for CuSCN hollow spheres by the difference of solubility products (Ksp) of CuBr and CuSCN or chemical self-transformation is proposed based on the experimental observations. The band gap energy of hollow CuSCN sphere is estimated to be 3.77 eV based on the results of optical measurement. The BET specific surface area of ball-in-ball CuSCN hollow architecture is calculated to be 30.5 m2/g and it has a bimodal mesoporous structure from nitrogen adsorption–desorption investigation.

Novel ball-in-ball CuSCN hollow hierarchical structure has been synthesized by a facile one-pot solution method in the presence of poly(vinylpyrrolidone) at room temperature.Figure optionsDownload as PowerPoint slideHighlights
► Ball-in-ball CuSCN hollow architecture were prepared via a facile one-pot aqueous solution route.
► The poly(vinylpyrrolidone) (PVP) played a key role in the formation of ball-in-ball structure.
► The crystal phase and morphology of the products were characterized.
► The formation mechanism of CuSCN hollow spheres were investigated.
► The optical absorption and nitrogen adsorption–desorption property have been studied.