Preparation method of nano-copper oxide catalyst for degrading organic dye wastewater

Abstract

The invention belongs to the technical field of preparation of nano-catalytic materials and relates to a preparation method of a nano-copper oxide catalyst for degrading organic dye wastewater. The method comprises the following steps: 1) dissolving a strong base in hydrogen peroxide to prepare a strong base mixed solution, adding a copper ion solution with the concentration of 0.8-1.2mol / L into the strong base mixed solution while stirring, continuing stirring, centrifuging to obtain a precipitate, and washing with water; 2) dispersing the precipitate in deionized water to obtain a suspension, performing sealed aging treatment on the suspension at the temperature of 60 DEG C-100 DEG C for above 4h, then cooling, washing with deionized water and ethanol, and further drying to obtain the nano-copper oxide catalyst. According to the method provided by the invention, the advance preparation of a template and the use of any surfactant are not required, the method has the advantages of mild reaction, simple process, short period and no pollution of raw materials and products, and the prepared nano-copper oxide catalyst has the advantages of regular shape, uniform particle size and good catalytic performance.

Description

technical field [0001] The invention belongs to the technical field of preparation of nano catalytic materials, in particular to a preparation method of a nano copper oxide catalyst used for efficiently degrading organic dye wastewater. Background technique [0002] Since the 20th century, with the development of industry, the problem of environmental pollution has gradually become an important problem restricting the sustainable development of countries all over the world, and among the problems of environmental pollution, the problem of water pollution is particularly prominent. my country is a country with a relatively short supply of fresh water resources, but water pollution is increasing. Among them, dye wastewater has become one of the important sources of water pollution due to its complex composition, high chromaticity and high chemical oxygen demand. Therefore, the treatment technology of dye wastewater has been extensively studied. Among the advanced chemical ox...

AI Technical Summary

Problems solved by technology

[0004] At present, there are many researches on various preparation methods of nano-copper oxide applied in the field of catalysis, such as Zheng Gu, etc. (Zheng Gu, et al. Industrial and Engineering Chemistry Research 2004, 43, 30-35) Nano-copper oxide powder prepared by the optimized sol-gel method showed high catalytic activity when applied to the catalytic oxidation of methanol at a certain temperature; Yang Hui et al. (Yang Hui et al., Chemical Research and Application 2009, 21, 12-14) used the hydrothermal method to prepare the spherical structure nano-copper oxide of sheet-like self-assembled body. The copper oxide nano-powder obtained by this method has strong The catalytic effect can reduce the decomposition temperature of ammonium perchlorate by 70℃-80℃; Yang et al. (M. Q. Yang, et al. Journal of Colloid and Interface Science 2011, 355, 15-22) prepared the Nano-copper oxide powders with a series of morphologies such as flower-like, disc-shaped, and ellipsoidal. The copper oxide nano-powders obtained by this method all show excellent catalytic performance in the process of catalytic oxidation and degradation of methylene blue solution, but the catalytic cycle Longer, the degradation rate can reach about 97% when it is degraded for 10 hours

[0005] The preparation methods of nano-copper oxide catalysts are not mentioned one by one in the above content, but most of the methods have high requirements for raw materials and reaction conditions, and need to add regulators , the operation is relatively complicated, the obtained nano-copper oxide powder particles are not uniform, the product shape is not uniform, the catalytic effect is not ideal or the catalytic cycle is long, and some methods even have disadvantages such as waste and pollution of raw materials in the preparation process.

Images