High-temperature-mixing hydrothermal synthesis of ZnO nanocrystals with wide growth window |
| |
Institution: | 1. College of Material Science and Technology, State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;2. Hubei University of Science and Technology, School of Nuclear Technology and Chemistry & Biology, Xianning 437100, China |
| |
Abstract: | High-quality and controllable growth of nanocrystals (NCs) have been attracting great attention. Here, a high-temperature-mixing hydrothermal (HTMH) method was designed to synthesize ZnO NCs with high crystallinity and narrow size distribution in a wide growth window. Compared with conventional hydrothermal (CH) growth, zinc source and alkali precursors were intentionally separated in temperature-rising stage and permitted to mix at the starting of heat preservation stage of HTMH growth. Highly crystalline ZnO NCs with uniform spherical morphology can be formed at alkali concentration and temperature windows as wide as 0.1–0.5 M and 160–200 °C, respectively. However, the products via CH method have much larger changes in not only morphology but also size. These results demonstrated that the high-temperature-mixing reaction greatly facilitates nucleation but depresses grain growth. Considering the simplicity and reproducibility, such HTMH method could have wide potentials for the fabrication of various functional nanocrystals. |
| |
Keywords: | ZnO High-temperature-mixing hydrothermal Colloid nanocrystals Solution-process |
本文献已被 ScienceDirect 等数据库收录! |
|