A Research On New Surface Plasmon Photocatalytic Materials

With the increasingly serious environmental problems, environmental protection has become a major hot issue of this society. To develop a new non-polluting energy, reduce emissions of pollution and eliminate the existing pollutants are the main difficulties that required to be solved on the environmental problems. In this work, we do research on the new surface plasmon photocatalytic materials, as a new type of photocatalyst, which can not only make light energy into chemical energy to do the degradation of pollutants, but also does not produce any secondary pollution. The research and innovation of photocatalytic materials would have a great significance important on protecting the environment and reducing the greenhouse effects. The main content of this paper is as follows:In the first part, we describe the principle of the surface plasmon and relevant research progress, as well as the research on optical nanomaterials based on surface plasmon polaration.In the second part, we describe the production and characterization of micro-nanomaterials. The methods of preparation micro and nano materials include physical and chemical methods, and both have their advantages and disadvantages; the characterization of micro and nano materials includes electron microscopy, X-ray diffraction spectrum, UV-visible spectroscopy, Raman spectroscopy and so on. Also, we introduce the principle of photocatalytic experiment, relevant devices and the method of data processing. In the last of this part, we describe the Ag nanostructures that prepared by our independent innovation method. A detailed introduction was made to the synthesis process and the amount of the reactant. The morphology, structure and optical properties of the products were investigated.In the third part, we introduce a new facile solution phase route to prepare the novel heart-like AgCl micropaticles and propose a possible growth mechanism of the special novel morphology. The heart-like AgCl micropaticles are successfully prepared by means of a simple one-step hydrothermal method, with high yield, uniform size and unique appearance. The products were analysis by X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and UV-visible absorption spectrum. According to the investigated results of the influence on different reaction times on size and morphology of the products, a possible growth mechanism of AgCl microparticles has been proposed.In the fourth part, we describe how to systhesis the novel heart-like Ag@AgCl plasmonic photocatalyst. We use heart-like AgCl microparticles as the precursor, then fabricate by a photo-reduced method to produce the Ag@AgCl photocatalyst. Through changing the amount of reactants, another Ag@AgCl plasmonic photocatalyst with mixed heart and cube ones were prepared using the same method. Then photocatalytic experiments were made on the two samples. Photocatalytic experimental results show that the pure heart-like Ag@AgCl plasmonic photocatalyst has higher photocatalytic efficiency than the mixed one contains cubic particles, which mainly is due to the heart-like morphology has a bigger surface area than cube shape. So it has a larger contact area with methyl orange dye, and the photocatalytic reaction rate is faster and more efficient.In the last part, it is a summary of our full work and a prospect for future work.