Method for preparing tungsten doped zinc oxide nanosphere through liquid phases

Abstract

The invention relates to a method for preparing a tungsten doped zinc oxide nanosphere through liquid phases. The method comprises four stages of zinc oxide / sodium tungstate sol preparation, low-temperature drying, high-temperature annealing and grinding. Particularly, the tungsten doping proportion is preferably selected, and the preparation process parameters are optimized. The method comprisesthe steps that 2.3g of zinc acetate, and 0g, 0.03464g, 0.06927g, 0.10391g, 0.13854g and 0.17318g of sodium tungstate are dissolved into a mixed solution of 10mL of deionized water and 20mL of ethyl alcohol; stirring is performed for 10min; 1mL of neovaricaine is dripped at 65 DEG C; meanwhile, stirring is performed for 2h to obtain uniform and white sol; aging is performed for 36h at room temperature. The sol is dried for 2h at 60 DEG C; then, annealing is performed for 2h at 600 DEG C under the nitrogen gas protection in a CVD quartz tube; a sample is obtained; grinding is performed for 10min; a photocatalysis material of the tungsten doped zinc oxide nanosphere is obtained. The degradation rate of the product on 15mg / L methylene blue solution under the ultraviolet light irradiation of a300W mercury lamp is studied. The method has the advantages that the operation is simple; the equipment requirements are low; the repeatability is good; the cost is low; the obtained sample has excellent performance of degrading organic dye under the ultraviolet light irradiation.

Description

technical field [0001] The invention relates to a preparation method of a zinc oxide nanosphere photocatalytic material, in particular to a preparation method of a photocatalytic material based on tungsten-doped ZnO nanospheres which can significantly enhance the degradation of methylene blue under ultraviolet light. Background technique [0002] Since the 20th century, with the advancement of science and technology, people have brought serious environmental pollution while enjoying the convenience and comfort brought by the advancement of science and technology. The pollution problem has attracted more and more attention. However, there is still a lack of effective treatment methods for some toxic and refractory biochemical wastewater, such as the wastewater discharged from papermaking, dyes, and pesticides produced in industrial production. The photocatalytic degradation method has a simple process and low cost, and oxygen decomposes these structurally stable organic subst...

AI Technical Summary

Problems solved by technology

[0005] In view of the fact that metal-doped zinc oxide can obtain zinc oxide nanomaterials with different shapes, the liquid phase sol-gel method is used to prepare tungsten-doped zinc oxide nanosphere photocatalytic materials under the protection of nitrogen, which overcomes the traditional nanomaterial preparation process. The lack of tediousness and difficulty in regulation also optimizes the morphology of zinc oxide, providing an effective preparation method for finding a simple, low-cost and high-efficiency photocatalytic synthesis method

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