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One-step preparation method of magnetic Cu(I) microspheric catalyst

A catalyst and microsphere technology, which is applied in the field of one-step preparation of magnetic Cu microsphere catalysts, can solve the problems of limited use efficiency and environmental factors of magnetic chitosan microspheres, and achieve the goals of improving catalyst separation performance, simple operation, and simplified preparation methods Effect

Active Publication Date: 2019-04-05
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by this invention is to provide a method for preparing magnetic Cu(I) microsphere catalysts in one step, to solve the problem of using Fe in the prior art. 3 o 4 The use efficiency of magnetic chitosan microspheres prepared for magnetic substances and the limitations of environmental factors in the use process

Method used

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  • One-step preparation method of magnetic Cu(I) microspheric catalyst
  • One-step preparation method of magnetic Cu(I) microspheric catalyst
  • One-step preparation method of magnetic Cu(I) microspheric catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0039]Weigh 2 g of α-chitosan powder, slowly add 100 mL of acetic acid (1% mass fraction) into a 250 mL beaker, stir at room temperature, and the chitosan is completely dissolved after about 2 hours. Due to the low solubility of copper acetate, 1.9963g of copper acetate monohydrate was added into a beaker of 50mL of acetic acid (1% by mass fraction), ultrasonically dissolved, and then slowly dropped into the chitosan solution after complete dissolution, and stirred at room temperature for 1h. 4.9703g ferrous chloride tetrahydrate is dissolved in the beaker of 10mL acetic acid (mass fraction is 1%), slowly drop in the chitosan copper solution after dissolving completely, stir 1h at room temperature, obtain chitosan-copper-iron Complex precursor solution (containing ferrous chloride 0.16mol / L, containing copper acetate 0.06mol / L). Use a syringe pump to drop the precursor solution into a sodium hydroxide solution with a concentration of 2 mol / L at a rate of 1.0 mL / min to form pel...

Embodiment 2

[0055] Change the quality 4.9703g of ferrous chloride tetrahydrate into 3.4792g in Example 1, all the other are the same as Example 1, prepare magnetic Cu(I) microsphere catalyst, take it out and air-dry naturally when used.

Embodiment 3

[0057] Change the quality 4.9703g of ferrous chloride tetrahydrate into 3.9762g in Example 1, all the other are the same as Example 1, prepare magnetic Cu(I) microsphere catalyst, take it out and air-dry naturally when used.

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Abstract

The invention relates to a one-step preparation method of a magnetic Cu(I) microspheric catalyst. The method includes: mixing chitosan, a bivalent copper source and a bivalent iron source to prepare chitosan-copper-iron precursor solution; dropwise adding the precursor solution into strong alkaline solution to form microspheres, curing, washing the microspheres to neutral, and performing cross linking, washing and drying. The method is simple and low in cost, and stability and hydrogen peroxide degradation catalyzing performance of the prepared magnetic Cu(I) microspheric catalyst are superiorto those of a normal copper-iron Fenton catalyst.

Description

technical field [0001] The invention belongs to the field of preparation of copper-iron double metal oxides, in particular to a method for preparing magnetic Cu(I) microsphere catalysts in one step. Background technique [0002] Compared with traditional monometallic iron-based catalysts, copper-iron bimetallic oxides can more effectively activate oxidants such as hydrogen peroxide and persulfate to produce strong oxidizing active species. More importantly, copper-iron bimetallic oxides can still maintain high catalytic activity under neutral conditions, which significantly broadens the pH application range of Fenton-like catalysts. However, such catalysts are currently mostly obtained by hydrothermal method or high-temperature roasting method, and it is difficult to separate the powdered catalyst from water after use, and there is still a lot of room for improvement in terms of preparation methods and separation performance. [0003] Chitosan is a polysaccharide product ob...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J35/08C02F1/72C02F101/30
CPCC02F1/722C02F1/725B01J31/223C02F2101/308C02F2101/306C02F2101/30B01J35/33B01J35/51
Inventor 沈忱思曾夏梅张迪刘艳彪彭程李豪赵凤肖锐陈慧
Owner DONGHUA UNIV
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