title: One-pot sonochemical fabrication of hierarchical hollow CuO submicrospheres.
abstract: Hierarchical hollow CuO submicrospheres have been fabricated on a large scale by a facile one-pot sonochemical process in the absence of surfactants and additives. The as-prepared products were investigated by XRD, FESEM, EDX, TEM, SAED, HRTEM and BET nitrogen adsorption-desorption isotherms. The results reveal that hollow pumpkin-shaped structures possess a monoclinic phase CuO with the diameters ranging from 400 to 500 nm, and their walls with around 45 nm in thickness are composed of numerous single crystalline CuO nanoribbons with a width of about 8 nm. The BET specific surface area of the as-synthesized CuO hollow structures was measured to be 59.60 m(2)/g, and the single point adsorption total pore volume was measured to be 0.1036 cm(3)/g. A possible growth mechanism for the formation of hierarchical hollow CuO structures was proposed, which is considered to be a sonohydrolysis - oriented aggregation - Ostwald ripening process. The novel hollow CuO spherical structures may utilize applications in biosensors, photonics, electronics, and catalysts.
authors.affiliation: Department of Chemical and Materials Engineering, Hefei University, Hefei, China.
authors.forename: Chonghai
authors.initials: C
authors.lastname: Deng
authors.forename: Hanmei
authors.initials: H
authors.lastname: Hu
authors.forename: Xinqing
authors.initials: X
authors.lastname: Ge
authors.forename: Chengliang
authors.initials: C
authors.lastname: Han
authors.forename: Difang
authors.initials: D
authors.lastname: Zhao
authors.forename: Guoquan
authors.initials: G
authors.lastname: Shao
mesh_terms: D003300:Copper / Q000737:chemistry* / Q000528:radiation effects*; D008863:Microspheres; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects*; D016062:Porosity / Q000528:radiation effects; D011829:Radiation Dosage; D013010:Sonication / Q000379:methods*
chemical_list: D003300:Copper; C030973:cupric oxide