Research On The Construction And Catalytic Properties Of New Copper-based Catalytic Material

With the development of industrial technology and the expansion of production scale, industrial wastewater which organic printing and dyeing wastewater amount to about 10% is increasing in China. There are about hundreds of millions of tons of printing and dyeing wastewater is discharged into the water environment around us every year. Currently wastewater are mainly in the treatment of adsorption, electrochemistry, microbiological, etc.However, to some extent, the methods above are of high cost, poor selectivity, poor adaptability, sensitive to environmental conditions and other disadvantages. While the catalyst process possesses advantages of low cost and high efficiency in degradation and is widely used. Copper catalysts in particular, due to environmentally-friendly, low cost, low toxicity, and simple ligands, are highly concerned by researchers, the application of copper salts catalyze chemical reactions is currently a hot field.In this paper, a series of Cu₂（OH）PO₄ catalysts pretreated by surfactants were prepared and used to catalyze the degradation of methylene blue solution. When this catalyst was used to degrade methylene blue, 8 hours later, the total organic carbon decreased to 5%, the dye was mineralized completely. The experiment proved that the function of Cu₂（OH）PO₄ catalyst before combination of the composite surfactant（anion surfactant SDBS） neutral surfactant（PVP）has smaller size, larger specific surface area, higher catalytic efficiency.Based on the interaction the copper ions, anionic surfactants and neutral surfactants in the solution in the crystallization process of copper. Electrostatic attraction between anions and cations, the anionic surfactant SDBS chelates the Cu₂+ and forms a protective layer outside. The long chain structure of PVP forms a blocked layer outside the Cu₂+ due to the dispersion effect. The anionic surfactant（SDBS） and polymer（PVP） form a lyophilic protective layer on the surface of the Cu₂+. The addition of electrolytes increases the charge density interface and the solution viscosity, and the mixed surfactant has a higher surface adsorption capability. Thus, the composite surfactants have more impact on decreasing the size of Cu₂（OH）PO₄ catalyst in the process of crystallization. Thereby, increasing the specific surface area of S@P-Cu₂（OH）PO₄ catalyst which can increase the contact area with methylene blue in the solution so that the efficiency of degradation of methylene blue greatly improved.Meanwhile, a novel photocatalytic material Cu₂MoS₄/RGO was synthesized and applied to the photocatalytic degradation of dyes and photocatalytic reduction of methylene blue.The research results of this paper reveal the characteristics of the two kinds of copper-base catalysts and the differences of their catalytic performance for pollutants degradation, which can provide some theoretical guidance for the application of copper-base catalysts in the purification of water.