| The promising applications of semiconductor naomaterials in a wide range make them attract much attention. Thus, we have witnessed growing efforts toward developing various morphology-controlled synthesis routes. But there are plenty of space in the application of green chemistry in nanomaterials preparation. Therefore, this thesis focuses on the followings:(1) Truncated tetrahedral, hexagonal, tetrahedronal, cauliflower-like CuI nanostructures have been successfully at room temperature in short time. Hexagonal CuI film displays excellent superhydrophobicity without further modification by low-free-energy materials; The large surface area and rich exposed active sites are expected to endow such truncated tetrahedral nanostructures with excellent performance on catalysis; The preliminary investigations show that the tetrahedronal and cauliflower-like CuI structure not only exhibits high catalytic activity with respect to coupling reaction but also possesses high removal capacity for Cd (II).(2) By combining green chemistry and hydrothermal route, Ag-doped CuO metal-semiconductor nanocomposites have been prepared by using L-tryptophan as the stabilizing and reducing agent. In the reaction process, the complexation of Ag+ with NH3 and OH? decreased the redox potential of Ag+/Ag, which prevented the formation of isolated Ag nanoparticles in solution. The prepared Ag/CuO nanocomposites showed potential applications in photodegradation of organic dye pollutants under simulated sunlight. In contrast to the reported recipe, we have simplified the procedure, and made the route green. The results suggest that this biopolymer-assisted hydrothermal method is an efficient route for the fabrication of Ag-doped CuO metal-semiconductor nanocomposites. |
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