A novel flower-like 3D ZnO superstructure with high uniformity was fabricated on a large scale through a facile aqueous solution route at room temperature. The as-prepared ZnO superstructures with a diameter of about 3 mm are assembled by large amounts of interleaving nanosheets, which have a uniform thickness of about 15 nm and a well-crystalline structure with {10 10} planes as basal facets. The hierarchical microstructures, which were formed via a two-stage nucleation-growth process, highly depend on the concentration of NaOH and trisodium citrate dihydrate. The photoluminescence result indicates that the ZnO superstructures possess a relatively strong UV emission. The photodecomposition of methyl orange indicates that such ZnO superstructures possess excellent photocatalytic activity.
Covalent organic frameworks (COFs) with periodic network and open crystalline porous characteristic have received considerable attention due to their customizable structures and properties. Benefiting from the well-defined 1D nanochannels and...
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