Controllable Synthesis Of Hierarchical Micro/nano-Structure Materials And Their Photoelectric Properties

Hierarchical micro/nano-structure materials have unique physicochemical properties. And thesematerials have a wide application prospect in the optoelectronic field. Based on this background, the papermainly researches the controllable synthesis of hierarchical micro/nano-structure materials by four kinds ofnew synthesis method. Meanwhile, the paper also investigates their photoelectric properties and therelationship between structure and properties of hierarchical micro/nano-structure materials. The mainresearches as follows:1. Facile synthesis of rambutan-like ZnO hierarchical hollow microspheres with high photocatalytic activitytowards rhodamine BRambutan-like ZnO hierarchical hollow microspheres (ZnO HHMs) have been constructed usingcarboxyl methyl starch sodium (CMS) as a soft template via hydrothermal method. The products arecharacterized by XRD, BET, SEM, and TEM. The experimental parameters and growth mechanism of ZnOHHMs have been discussed in detail. The as-prepared samples display higher photocatalytic activitytowards the degradation of rhodamine B under ultraviolet (UV) irradiation.2. Facile solvothermal synthesis of BiOCl/ZnO heterostructures with high visible-light-inducedphotocatalytic activityMonodisperse and homogeneous nanosheet-assembled (BiOCl)x(ZnO)1-xflowers of variouscompositions were synthesized by solvothermal. The products are characterized by XRD, DRS, XPS, andTEM.(BiOCl)x(ZnO)1-xheterostructured photocatalysts displayed much higher photocatalytic activity thansingle component towards the degradation of Rhodamine B (RhB) under visible-light irradiation (λ>420nm). It was found that the (BiOCl)0.6(ZnO)0.4composites showed the best activity among theseheterostructured photocatalysts. The possible mechanism of the photocatalytic ability enhancement of theBiOCl and ZnO coupling was studied in some detail3. D-penicillamine assisted hydrothermal synthesis of Bi2S3nanoflowers and their electrochemicalapplicationSingle crystalline flower-like Bi2S3nanostructures were successfully synthesized via a simple, facile, and green hydrothermal method, with the assistance of D-penicillamine. The products were characterizedby XRD, SEM, TEM, and FT-IR, and found their morphologies mainly depend on the ratios of Bi3+toD-penicillamine, as well as the reaction temperature and time. And the possible grow th mechanism hasbeen discussed in some detail. In addition, the as-prepared Bi2S3nanoflowers show good hydrogen storageability. This strategy can be potentially expanded to prepare other metal chalcogenides materials.4. A simple and facile solvothermal synthesis of3D PbS microstars with multi-dendritic armsA simple and facile approach was developed in the solvothermal synthesis of hierarchical PbSmicrostars with multi-dendritic arms, which were characterized by XRD, SEM, TEM, FT-IR and PL. Themorphologies of the PbS products are strongly determined by the reaction time and temperature, the ratiosof the precursors and the mixed solvent with various components, and thereby their possible formationmechanism has been discussed in some detail. The as-prepared PbS crystals have potential and practicalapplications in nanomaterials and nanodevice.