Abstract
Uniform hierarchical Cu2O hollow submicrospheres have been successfully prepared via a facile sonochemical process at room temperature. The products were examined by XRD, FESEM, TEM, HRTEM, N2 adsorption/desorption isotherms and UV–vis diffuse reflectance spectra (DRS). It was found that the hierarchical Cu2O hollow spheres with 400–600nm in outer diameters are assembled by pure cubic Cu2O nanoparticles. The band gap energies were estimated to be 1.93eV. The pore size distribution displayed inhomogeneous mesopores with size ranging from 2 to 15nm. A possible growth mechanism for the hierarchical hollow Cu2O structures was simply proposed. More importantly, the adsorption capacities of as-prepared Cu2O hollow spheres for methyl orange were calculated to be 446.43mgg−1, suggesting a promising application for wastewater purification.
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