Abstract
A novel three-dimensional binary structure was successfully synthesized with the assist of soluble long-chain tetraalkylammonium carboxylate zinc salt by hydrothermal treatment. The unique binary structure consists of two different crystal structures in one individual, with the head being a layered basic zinc salt (LBZS) microsphere and the body being a ZnO rod. During the synthesis process, careful concentration and time-controlled experiments were needed to achieve a key intermediate of stable self-assembled LBZS, which was subsequently converted into an LBZS/ZnO binary structure. The presence of the binary structure demonstrates a possible growth mechanism involving stepwise evolution as zinc salt → LBZS → LBZS/ZnO → ZnO, giving an improvement of the understanding of the growth of ZnO in solution. Thus, this study provides the rationality for the existence of the solid-phase transformation as well as the competition relationship between the solid-phase transformation and the dissolution–renucleation process during the transformation process of LBZS to ZnO.
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