Iron-based porous material for degrading azo dye and preparation method of iron-based porous material

Abstract

The invention discloses an iron-based porous material for degrading an azo dye. The iron-based porous material comprises an iron element which has an atom percentage within 73.5-86%. The preparation method comprises the following steps: selecting raw materials according to proportions of a target alloy, smelting in high-vacuum 5*10<-3>Pa, and repeatedly smelting for 3 to 4 times to uniformly mix the alloy; carrying out a single copper roller throwing quick-cooling method on the smelted main alloy so as to obtain an iron-based amorphous alloy strip; carrying out isothermal annealing thermal treatment on the iron-based amorphous alloy strip so as to obtain an iron-based nano crystal strip; selecting an appropriate corrosive solution to carry out dealloying treatment on the iron-based nano crystal strip, so as to obtain an iron-based porous strip. By adopting the method, the structure and the size of iron-based porous iron can be controlled by changing components of an iron-based amorphous alloy, thermal treatment temperatures and dealloying times, the operation process is simple, convenient and controllable, meanwhile, the prepared iron-based porous material has the advantages of being high in specific surface area, high in porosity, high in activity, and the like, and the treatment efficiency is remarkably improved when the azo dye is degraded with the iron-based porous material.

Description

technical field [0001] The invention relates to the field of porous material preparation and chemical materials, in particular to an iron-based porous material for degrading azo dyes and a preparation method thereof. Background technique [0002] According to the composition, properties and treatment indicators of sewage, the methods for degrading azo dyes in wastewater can be divided into physical, biological and photochemical methods. Activated carbon adsorption method is a conventional physical process. Biological method refers to the sewage treatment technology that uses the metabolism of microorganisms to degrade and remove organic pollutants in sewage. The limitation of this method is that it can only degrade some special toxic compounds. Nitrogen dyes, which cannot function in complex environments containing various chemicals. On the other hand metals have been shown to effectively degrade organic compounds. [0003] The degradation of azo dyes by zero-valent iron m...

AI Technical Summary

Problems solved by technology

However, nano-zero-valent iron materials face many problems, such as high production costs, poor self-stability, and physiological toxicity.

Some studies have found that the degradation efficiency of organic pollutants can be improved by plating noble metal elements on the surface of zero-valent iron, but the disadvantages of this method are very obvious. The addition of noble metals will greatly increase the preparation cost, and the noble metal elements will Cause secondary pollution to the environment

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