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

A technology of porous materials and azo dyes, used in chemical instruments and methods, manufacturing tools, water pollutants, etc., can solve the problems of poor self-stability, increased preparation cost, physiological toxicity, etc., and achieves good conductivity and low price. , Easy to operate and controllable effect

Inactive Publication Date: 2019-03-01
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 met

Method used

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

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Embodiment 1

[0018] (1) Fe 76 Si 9 B 10 P 5 As the initial alloy composition, the raw material purity required for the initial alloy is 99.98% Fe, 99.998% Si, 99.5% B and alloy 99.5% Fe 3 The mixture composed of P is put into a crucible, and the crucible is put into a melting furnace. First, vacuumize the furnace chamber so that the vacuum inside the furnace chamber is 5*10 -3 Pa, and then filled with argon, so as to ensure that the melting of the alloy can be carried out uniformly in the atmosphere protection of the inert gas. In order to ensure that the alloy can be mixed evenly, each alloy ingot is repeatedly smelted 3 to 4 times.

[0019] (2) Put the smelted master alloy into the quartz tube, put the quartz tube into the belt throwing equipment, melt the alloy through induction heating, and finally use high-pressure argon to spray the molten alloy onto the high-speed rotating copper roller , forming Fe with a thickness of 20 μm and a width of 5 mm 76 Si 9 B 10 P 5 Amorphous ...

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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...

Claims

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Application Information

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IPC IPC(8): C21D9/52C22C3/00C02F1/70
CPCC02F1/705C02F2101/308C02F2101/38C21D9/52C21D2201/03C22C3/00
Inventor 秦凤香翁楠淡振华王凤周洋李云
Owner NANJING UNIV OF SCI & TECH
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