Wool fiber metal complex photocatalyst and preparation method thereof

A metal complex, wool fiber technology, applied in the field of wool fiber metal complex photocatalyst and preparation thereof, can solve the problems of not easily biodegradable synthetic fibers, complicated catalyst preparation process, protection of unfavorable ecological environment, etc. Conducive to industrialization, easy operation, good catalytic performance

Inactive Publication Date: 2015-12-23
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Nafion membrane is expensive, and modified polyacrylonitrile fibers and modified polytetrafluoroethylene fibers need to undergo complex modification reactions to introduce functional groups that can coordinate with metal ions, which makes the catalyst preparation process complicated. On the other hand, these fibers are synthetic fibers that are not easy to biodegrade, which is not conducive to the protection of the ecological environment, which limits their application as a heterogeneous Fenton reaction photocatalyst carrier

Method used

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  • Wool fiber metal complex photocatalyst and preparation method thereof
  • Wool fiber metal complex photocatalyst and preparation method thereof
  • Wool fiber metal complex photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Pretreatment process: at room temperature and under agitation, first use a nonionic surfactant aqueous solution with a concentration of 2.0g / L to wash and treat the wool fiber for 10 minutes, then take it out, then wash it with distilled water for 5 times, and finally wash it with It can be dried under vacuum at 50°C;

[0028] 2. Preparation of iron-copper metal ion mixed solution: use copper sulfate and ferric chloride to prepare a mixed metal ion aqueous solution with a molar concentration of 0.10 mol / L, and the molar concentration ratio of iron ions and copper ions in the mixed aqueous solution is required to be 1: 0.33, that is, the volume concentration of ferric chloride aqueous solution and copper sulfate aqueous solution is 0.075mol / L and 0.025mol / L respectively. Then the resulting mixed aqueous solution was left to stand for 2-5 hours, and filtered for subsequent use;

[0029] 3. Coordination reaction between wool fibers and metal ions: immerse the wool fibe...

Embodiment 2

[0033] 1. The process is the same as Step 1 in Example 1 respectively.

[0034] 2. The molar concentration ratio of iron ion and copper ion in the mixed aqueous solution of metal ions is adjusted to 1: 1, that is, the volume concentration of ferric chloride aqueous solution and copper sulfate aqueous solution is 0.05mol / L and 0.05mol / L respectively. All the other are with 2 in embodiment 1.

[0035] 3. The process is the same as step 3 in Example 1 respectively.

[0036] 4. The process is the same as step 4 in Example 1 respectively. The obtained yellow-green wool fiber metal complex catalyst is abbreviated as Cu-Fe-wool-2. After measurement and calculation: the contents of iron ions and copper ions in the catalyst Cu-Fe-ALG-2 are 30.46mg / g and 23.37mg / g respectively.

Embodiment 3

[0038] 1. The process is the same as Step 1 in Example 1 respectively.

[0039] 2. The molar concentration ratio of iron ion and copper ion in the mixed aqueous solution of metal ions is adjusted to 1: 3, that is, the volume concentration of ferric chloride aqueous solution and copper sulfate aqueous solution is 0.025mol / L and 0.075mol / L respectively. All the other are with 2 in embodiment 1.

[0040] 3. The process is the same as step 3 in Example 1 respectively.

[0041] 4. The process is the same as step 4 in Example 1 respectively. The obtained yellow-green wool fiber metal complex catalyst is abbreviated as Cu-Fe-Wool-3. After measurement and calculation: the contents of iron ions and copper ions in the catalyst Cu-Fe-ALG-3 are 41.35mg / g and 37.35mg / g respectively.

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Abstract

The invention relates to a wool fiber metal complex photocatalyst and a preparation method thereof. The wool fiber metal complex photocatalyst is characterized by being composed of an alginate fiber ligand which contains a large amount of carboxyl and has excellent biodegradability and a double complexing reagent of iron ions and copper ions, wherein the content of the iron ions is 22.7-41.35 mg/g, and the content of the copper ions is 14.3-37.35 mg/g. The preparation method comprises the following processes that 1, pretreatment process of wool fibers is conducted; 2, an iron and copper metal ion mixed solution is prepared; 3, complexing reaction is conducted on the wool fibers and the metal ions; 4, aftertreatment is conducted, and a yellow-green fibrous wool fiber iron compolex catalyst is obtained. The wool fiber metal complex photocatalyst has excellent catalytic activity within a wide pH range, the salt tolerance is strong, the reusability is good, degradation in the natural environment can be achieved after using, environmental pollution can almost not be caused, and the wool fiber metal complex photocatalyst is an environmentally friendly heterogeneous Fenton reaction catalyst with excellent comprehensive performance.

Description

technical field [0001] The invention relates to chemical catalyst technology, in particular to a wool fiber metal complex photocatalyst for promoting the degradation of organic pollutants such as dyes in printing and dyeing wastewater and a preparation method thereof. Background technique [0002] Fenton oxidation technology is an industrial wastewater treatment technology with bright development prospects, which can rapidly and completely degrade and mineralize refractory organic pollutants such as dyes. The heterogeneous Fenton reaction catalyst made by immobilizing iron ions on the surface of the supporting material can not only significantly promote the degradation reaction of organic pollutants, but also has the advantages of strong pH applicability and easy recovery, so the heterogeneous Fenton catalyst Research and development is currently the key to improving Fenton oxidation technology. As a heterogeneous Fenton photocatalyst, fiber metal complexes have attracted p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C02F1/30C02F1/32C02F1/72C02F103/30C02F101/38
Inventor 董永春李英超崔桂新陈震雷沈伟峰
Owner TIANJIN POLYTECHNIC UNIV
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