Synthesis And Property Study Of Micro/Nanostructured Bismuthal Compounds

In this dissertation, we explored a facile and economical hydrothermal method and precursor template method to prepare bismuthal compounds micro/nanostructures, respectively. The structure and the morphologies of samples and the formation mechanism were studied. Furthermore, the photocatalytic properties of the samples were also investigated.The scientific details could be divided into three parts as followings:1.Bismuth oxide submicrorods were prepared by hydrothermal method using Bi(NO3)3·5H2O and NaOH as starting materials and PEG as surfactant. The formation mechanism on the products of three different morphologies was investigated. The optical properties of the bismuth oxide were studied and the value of energy gap calculated from the absorption spectra, was about 2.64eV.2. BiOCOOH 3D flowerlike nanostructures have been successfully synthesized by a facile and economical DMF hydrothermal process, which was used as precursor template to synthesis of Bi2O2CO3 and Bismuth Oxide. In order to study the photocatalytic of the as-synthesized Bismuth Oxide structures, these samples were applied to decompose a typical textile industry pollution Rhodamine B under exposure to Xe lamp irradiation. Therefore, the preparation and property studies of Bismuth Oxide structures suggest the potential future applications in photocatalysis by sunlight.3. Bismuth phosphate microspindles have been synthesized on a large scale by a convenient microwave method. The effects of reaction time and temperature were studied. The samples were investigated by means of XRD, FE-SEM and TEM. The length of bismuth phosphate microspindls was about 300-400nm, and the diameter was about 100-200nm.