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Preparation of Porous Magnetic Composite Silk Supported Praseodymium Doped Biobr Photocatalyst

A photocatalyst and magnetic technology, applied in catalyst activation/preparation, organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, etc., to achieve the effect of light specific gravity, increased loading capacity, and high loading rate

Inactive Publication Date: 2019-08-02
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on the preparation of supported BiOBr photocatalysts.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of liquid A: In the reaction kettle, add 1-ethyl-3-methylimidazole bromide: 58g, degummed silk: 42g, seal it, place it in an oven, and raise the temperature to 120±2°C. After reacting for 11 h, take it out and let it cool down to room temperature naturally to prepare liquid A;

[0025] (2) Suspension B preparation: In the reactor, add deionized water: 86 mL, polyvinyl alcohol: 9 g, heat and stir to dissolve, add nano-ferric oxide: 5 g, ultrasonically disperse for 20 min, and cool to room temperature , make B suspension;

[0026] (3) Preparation of porous magnetic composite silk: In the reactor, add respectively, A solution: 48g, B suspension: 46g, ammonium tetraborate: 2g, stir and mix evenly, stir, the temperature rises to 50°C, drop by mass volume Magnesium chloride solution with a percentage concentration of 8%: 4mL, continue to stand at a constant temperature of 50±2°C for 8 hours, cool to room temperature, separate solid and liquid, wash, and freez...

Embodiment 2

[0030] (1) Preparation of liquid A: In the reaction kettle, add 1-ethyl-3-methylimidazole bromide: 55g, degummed silk: 45g, seal it, place it in an oven, and raise the temperature to 120±2°C. After reacting for 10 h, take it out and let it cool down to room temperature naturally to prepare liquid A;

[0031] (2) Suspension B preparation: In the reactor, add deionized water: 84 mL, polyvinyl alcohol: 8 g, heat and stir to dissolve, add nano-ferric oxide: 8 g, ultrasonically disperse for 20 min, cool to room temperature , make B suspension;

[0032] (3) Preparation of porous magnetic composite silk: In the reactor, add respectively, A solution: 45g, B suspension: 48g, ammonium tetraborate: 1g, stir and mix evenly, stir, the temperature rises to 50°C, drop by mass volume Magnesium chloride solution with a percentage concentration of 8%: 6mL, continue to stand at a constant temperature of 50±2°C for 8 hours, cool to room temperature, separate solid and liquid, wash, and freeze-dr...

Embodiment 3

[0036] (1) Preparation of liquid A: In the reaction kettle, add 1-ethyl-3-methylimidazole bromide: 60g, degummed silk: 44g, seal it, place it in an oven, and raise the temperature to 120±2°C. After reacting for 12 hours, take it out and let it cool down to room temperature naturally to prepare liquid A;

[0037] (2) Suspension B preparation: In the reactor, add deionized water: 88 mL, polyvinyl alcohol: 6 g, heat and stir to dissolve, add nano-ferric oxide: 6 g, ultrasonically disperse for 20 min, and cool to room temperature , make B suspension;

[0038] (3) Preparation of porous magnetic composite silk: In the reactor, add respectively, A solution: 50g, B suspension: 44g, ammonium tetraborate: 3g, stir and mix evenly, stir, the temperature rises to 50°C, drop by mass volume Magnesium chloride solution with a percentage concentration of 8%: 3mL, continue to stand at a constant temperature of 50±2°C for 8 hours, cool to room temperature, separate solid and liquid, wash, and f...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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PUM

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Abstract

The invention discloses a preparation method for porous magnetic composite silk loaded with praseodymium-doped BiOBr photocatalyst. It is characterized in that silk and polyvinyl alcohol are added to add nanometer iron tetraoxide to obtain porous magnetic composite silk; the expanded material is prepared by combustion method. Pine samarium doped BiOBr powder; then in the reactor, add the following composition mass percentage, liquid paraffin: 70~76%, sorbitan monostearate: 4~8%, add praseodymium doping under vigorous stirring BiOBr powder: 2~5%, ultrasonically dispersed for 30 minutes, add porous magnetic composite silk: 16~20%, stir, react, solid-liquid separation, wash with absolute ethanol, dry, prepare porous magnetic composite silk loaded praseodymium Doped BiOBr photocatalyst. The invention has the characteristics of simple preparation method, good catalyst stability, degradability and environmental friendliness; the catalyst is easy to recover, has mild reaction conditions, high catalytic activity and low dosage.

Description

technical field [0001] The invention relates to the technical field of preparation of supported catalysts, in particular to a method for preparing a porous magnetic composite silk supported praseodymium-doped BiOBr photocatalyst and its application in the degradation of organic pollutants. Background technique [0002] Silk (silk) is a continuous long fiber that is coagulated by the silk liquid secreted by cooked silkworms when they cocoon. It is also called natural silk and is a natural fiber. One of the earliest animal fibers used by humans, silk is the lightest, softest and thinnest natural fiber in nature. Silk is mainly composed of animal protein, rich in 18 kinds of amino acids necessary for the human body, which can promote the vitality of skin cells. The silk fibers of silkworm cocoons are very thin, only 20 to 30 microns, which is one of the most precious ecological resources, a renewable resource, and a very precious long fiber raw material. The application of th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06B01J31/26B01J35/06B01J37/02B01J37/32C02F1/28C02F1/30C02F101/30C02F101/34
CPCC02F1/285C02F1/30B01J31/06B01J31/26B01J37/0009B01J37/0207B01J37/32C02F2101/345C02F2101/30C02F2101/308C02F2305/10B01J35/39B01J35/58B01J35/33
Inventor 李慧芝王英姿韩斌
Owner UNIV OF JINAN
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