Controlled-synthesis and photocatalytic properties of ZnO hierarchical nanorod-based whisks and nanorod-based dandelions

Abstract

A facile approach has been developed to fabricate ZnO hierarchical architectures with different morphologies under hydrothermal conditions. ZnO nanorod-based whisks and nanorod-based dandelions have been synthesized through the adjustment of the ratio of Zn(NO 3 ) 2 to glycine. The structures of ZnO hierarchical architectures have been examined by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), and high-resolution transmission electron microscopy (HRTEM), and the possible growth mechanism of these ZnO nanostructures has also been discussed. In addition, the photocatalytic properties of these ZnO nanostructures have been also investigated. Investigations confirm that the morphology and specific surface areas play important roles in the photocatalytic properties of these ZnO nanomaterials.

Sonochemical Coating of Textiles with Zinc Oxide: Robust, Silver-Seeded Growth on Cotton for Effective UV Shielding

“…Intermediate seed concentrations resulted in a higher density of still, well-resolved rods, though with overlapping island growth. At the highest seed Ag-concentrations, there is highly competitive growth upon growth, induced by a greater number of smaller nucleation clusters, resulting in dense, hexagonal nanorod clusters and sometimes, flower-type (i.e., linked rod) structures in the ZnO overlayer, as reported previously . In all cases, there seems to be only minor yarn damage to the polymeric substrate during the coating process …”

“…At the highest seed Ag-concentrations, there is highly competitive growth upon growth, induced by a greater number of smaller nucleation clusters, resulting in dense, hexagonal nanorod clusters and sometimes, flower-type (i.e., linked rod) structures in the ZnO overlayer, as reported previously. 62 In all cases, there seems to be only minor yarn damage to the polymeric substrate during the coating process. 63 Light Fe-doping of ZnO affords nucleation and growth versus the direct growth of ZnO, thus yielding crystalline, pure wurtzite (i.e., not mixed phase).…”