Preparation of Nano Cuo Photocatalysts and Coupled Cuo/Zno Photocatalysts Using a Rotating Packed Bed with Blade Packings

During the past few years, utilizing high gravity technology to prepare nanoparticles become the important trend. China has developed this novel technology to prepare nano calcium carbonate in the industrial scale. Based on this novel technology, the conventional rotating packed bed and the spinning disk reactor would be applied to the production of nanoparticles. However, a conventional rotating packed bed has larger surface area of packings where nanopaticles would attach to easily, thus affecting the nuclear environment. Also, characteristics of micromixing in a spinning disk reactor would be significantly influenced by flow rate. Therefore, the conventional rotating packed bed and the spinning disk reactor would not be the best choice for producing nanoparticles in industry. Owing to that flow pattern and mixing efficiency of a rotating packed bed with blade packings are different from traditional apparatus, as expected; this novel equipment could have characteristics of micromixing similar to the conventional rotating packed bed and the spinning disk reactor. Moreover, a rotating packed bed with blade packings could offer smaller surface area of packings and higher micomixng efficiency at larger flow rates. As a result, a rotating packed bed with blade packings would be suitable for the production of nanoparticles. At first, this study will investigate characteristics of micromixing in a rotating packed bed with blade packings for designing this novel equipment for the production of nano CuO photocatalysts and coupled CuO/ZnO photocatalysts. Finally, we hope that a rotating packed bed with blade packings could be used for the production of these photocatalysts in industry. In the first part of this study, nano CuO photocatalysts will be prepared by precipitation method in a rotating packed bed with blade packings. Their photocatalytic activities will be investigated as a function of the main operating parameters, including concentration of copper salt, concentration of the precipitant, rotating speed, flow rate of reactants, type of blade, calcination temperature, and calcination time. In the second part of this study, coupled CuO/ZnO photocatalysts will be prepared by co-precipitation method in a rotating packed bed with blade packings. Their photocatalytic activities will be investigated as a function of the main operating parameters, including ratio of metal salts, concentration of copper salt, concentration of zinc salt, rotating speed, flow rate of reactants, type of blade, calcinatio temperature, and calcination time. In the third part of this study, Ag/CuO and Ag/CuO/ZnO were prepared by doping Ag into nano CuO photocatalysts and coupled CuO/ZnO photocatalysts. Their photocatalytic activities will be investigated as a function of the main operating parameters, including amount of Ag, kind of silver salt, reduction temperature, and reduction time.

Project ID:PB10401-0083
External Project ID:NSC102-2221-E182-001-MY3