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Preparation method and application of chitosan bi-metal complex catalyst

A chitosan and bimetallic technology, which is applied in the field of preparation of chitosan bimetallic complex catalysts, can solve the problems of low molecular weight and low catalytic efficiency, and achieve the effects of simple operation, low cost, good adsorption and catalytic performance

Inactive Publication Date: 2015-12-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to existing research statements, chitosan-copper complexes can catalyze the oxidation of hydrogen peroxide to degrade dye pollutants, but the catalytic efficiency is low, and it is only suitable for organic dyes with low molecular weight

Method used

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  • Preparation method and application of chitosan bi-metal complex catalyst
  • Preparation method and application of chitosan bi-metal complex catalyst
  • Preparation method and application of chitosan bi-metal complex catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Slowly dissolve 1 g of chitosan into 50 mL of acetic acid (2%) solution, slowly add 50 mL of a mixture containing ferric chloride (0.1 mol / L) and copper sulfate (0.1 mol / L), keep stirring at room temperature for 240 minutes, add 150mL of absolute ethanol precipitated the chitosan double metal complex solid, and obtained the chitosan double metal complex catalyst after filtering, washing and drying.

Embodiment 2

[0028] Slowly dissolve 1 g of chitosan into 50 mL of acetic acid (2%) solution, slowly add 50 mL of a mixture containing ferric chloride (0.1 mol / L) and copper sulfate (0.2 mol / L), keep stirring at room temperature for 240 minutes, add 150mL of absolute ethanol precipitated the chitosan double metal complex solid, and obtained the chitosan double metal complex catalyst after filtering, washing and drying.

Embodiment 3

[0030] Slowly dissolve 1 g of chitosan into 50 mL of acetic acid (2%) solution, slowly add 50 mL of a mixture containing ferric chloride (0.05 mol / L) and copper sulfate (0.1 mol / L), keep stirring at room temperature for 240 minutes, add 150mL of absolute ethanol precipitated the chitosan double metal complex solid, and obtained the chitosan double metal complex catalyst after filtering, washing and drying.

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Abstract

The invention discloses a preparation method and application of a chitosan bi-metal complex catalyst. The preparation method comprises the following steps: dissolving chitosan in an acetic acid solution; slowly adding a ferric chloride solution and copper sulfate mixed solution for stirring at room temperature; adding an organic solvent, and then separating out a solid; conducting filtration, washing and drying on the solid to obtain the chitosan bi-metal complex catalyst. The prepared chitosan bi-metal complex catalyst and a method for removing dye pollutants in water by use of the chitosan bi-metal complex catalyst are simple to implement, friendly to environment and low in cost, and the effect of removing the dye pollutants in water is good, so that the method can serve as an environment-friendly efficient dye wastewater treatment method.

Description

technical field [0001] The invention relates to a preparation method of a chitosan double metal complex catalyst and its application to removal of dye pollutants in water. Background technique [0002] Chitosan (chitosan, β-(1,4)-2-amino-2-deoxy-R-glucan) is chitin (chitin, β-(1,4)-2-acetylamino-2-deoxy -D-glucan) is a product of partial deacetylation, which is widely derived from the shells of crustaceans such as shrimp and crab, and has the advantages of abundant resources, non-toxicity and good biocompatibility. Chitosan molecules contain abundant -OH and -NH 2 The side group is a typical Lewis basic group. From the point of view of conformation, it is a flat bond. This special structure is very conducive to the formation of chelates with metal ions. Metal ions and chitosan macromolecules form a coordination polymer through coordination. On the one hand, metal ions are fixed in a specific position by the chitosan coordination group as a central ion, and on the other han...

Claims

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Application Information

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IPC IPC(8): B01J31/22C02F1/72
Inventor 沈忱思塞迪亚李素陈彦红陈小光柳建设林肇彧王鸿宇吴刘曦
Owner DONGHUA UNIV