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Silk fiber iron complex photocatalyst and preparation method thereof

A technology of silk fiber and iron complex is applied in the field of wool fiber metal complex photocatalyst and preparation thereof, and can solve the problems of not easy biodegradable synthetic fiber, complicated catalyst preparation process, unfavorable ecological environment protection, etc. Excellent reusability, favorable for industrialization, easy to operate

Inactive Publication Date: 2015-12-30
TIANJIN POLYTECHNIC UNIV
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  • Abstract
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  • Claims
  • Application Information

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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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  • Silk fiber iron complex photocatalyst and preparation method thereof
  • Silk fiber iron complex photocatalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0026] 1. Silk fiber pretreatment process: at room temperature and under stirring conditions, firstly use a non-ionic surfactant aqueous solution with a concentration of 2.0g / L to wash and treat the silk fiber for 10 minutes, then take it out, and then use distilled water to wash it 5 times , and finally vacuum-dry it at 50°C;

[0027] 2. Preparation of iron ion solution: use ferric chloride to prepare an iron ion aqueous solution with a molar concentration of 0.02mol / L-0.10mol / L, then leave the obtained iron ion aqueous solution for 2-5 hours, then filter for later use;

[0028] 3. Coordination reaction of silk fiber and iron ion: the silk fiber obtained by pretreatment is immersed in the described ferric ion mixed solution, the ratio that makes silk fiber weight (gram) and mixed metal ion mixed solution volume (milliliter) be 1: 40 , under the conditions of 50°C, pH value 1.5-2.0 and stirring, carry out the coordination reaction for 1-3 hours, use distilled water to wash the...

Embodiment 2

[0031] 1. The process is the same as Step 1 in Example 1 respectively.

[0032] 2. The molar concentration of the iron ion in the described iron ion solution is 0.05mol / L, and all the other are with step 2 in the embodiment 1.

[0033] 3. The process is the same as step 3 in Example 1 respectively. The obtained yellow silk fiber iron complex catalyst is abbreviated as Fe-Silk-2. After measurement and calculation: the contents of iron ions and copper ions in the catalyst are 37.47mg / g respectively.

Embodiment 3

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

[0036] 2. The molar concentration of the iron ion in the described iron ion solution is 0.1mol / L, and all the other are with step 2 in the embodiment 1.

[0037] 3. The process is the same as step 3 in Example 1 respectively. The obtained yellow silk fiber iron complex catalyst is abbreviated as Fe-Silk-3. After measurement and calculation: the contents of iron ions and copper ions in the catalyst are respectively 54.23 mg / g.

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Abstract

The invention relates to a silk fiber iron complex photocatalyst and a preparation method thereof. The photocatalyst is characterized in that the photocatalyst is formed by complexing reaction of silk fiber ligands containing a great number of complexing groups and iron ions, the appearance of the silk fiber iron complex photocatalyst is in a claybank fiber shape, and the content of the iron ions ranges from 21.85 mg / g to 54.23 mg / g. The preparation method includes the following steps of 1, preprocessing of silk fibers, 2, preparation of an iron ion solution and 3, the complexing reaction of the silk fibers and the iron ions, and the yellow green fibrous alginate fiber iron complex photocatalyst is obtained. The photocatalyst has excellent catalytic activity in a wide pH range, is high in salt tolerance, good in reusability, capable of being degraded in a natural environment after being used and basically free of environmental pollution and is a heterogeneous Fenton reaction catalyst which is excellent in comprehensive performance and environmentally friendly.

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] In recent years, the heterogeneous Fenton reaction technology has become a research hotspot in the field of organic pollutant degradation due to its strong pH applicability and easy recovery. The catalyst is usually made of iron ions fixed on the surface of the carrier. In addition to Nafion membranes and ion exchange resins, fiber materials, especially organic carriers such as polyacrylonitrile (PAN) fibers and modified polytetrafluoroethylene fibers, can react with iron ions to form complexes, which serve as catalysts for heterogeneous Fenton reactions. Degradation reactions such as dyes show excellent performance [see 1.IshtchenkoVVetal.ProductionofamodifiedPANfibrouscatalystand...

Claims

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Application Information

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IPC IPC(8): B01J31/22
Inventor 董永春陈震雷崔桂新沈伟峰李英超
Owner TIANJIN POLYTECHNIC UNIV
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