Synthesis And Characterization Of Chalcogenide Micro- And Nanostructure By Hydrothermal Method

Different morphological Ag₂S/Al₂O₃ nanocomposites, CdS micro- or nanocrystals and CuS hollow microprisms were prepared by low temperature hydrothermal process. The influence of the experimental parameters on the morphologies of as-prepared products and the corresponding growth process has been investigated. The research results we acquired were as follows:1. Different morphological Ag₂S/Al₂O₃ nanocomposites were prepared by hydrothermal condition. The formation and evolution of this structure was investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and EDAX. A possible growth process and the effect of experimental parameters for different morphological Ag₂S/Al₂O₃ nanocomposites have been proposed.2. Different morphological CdS crystals, including nanospheres, microcorns, and multi-armed microrods, have been synthesized by a facile hydrothermal method. The formation and evolution of the products were characterized by XRD pattern, SEM images and TEM images. Meanwhile, the influences of the experimental conditions, such as the Cd/ Na₂S₂O₃ molar ratio, concentration of sodium hydroxide, reaction time, and inorganic additive on the morphologies of the CdS crystals have been investigated. A possible growth process of CdS microcorns has been studied.3. CuS hollow microprisms have been synthesized by a low temperature hydrothermal process. The product was characterized by SEM, XRD and DTA. And the influences of the experimental condition have been investigated. The CuO microparticles obtained by the decomposition of CuS microprisms were investigated as an additive for promoting the thermal decomposition of ammonium perchlorate (AP).