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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

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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...

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PUM

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Abstract

The invention discloses a preparation method of a porous magnetic composite silk-loaded praseodymium-doped BiOBr photocatalyst. The preparation method of the porous magnetic composite silk-loaded praseodymium-doped BiOBr photocatalyst is characterized by comprising the following steps: adding silk and polyvinyl alcohol in nano ferroferric oxide to obtain porous magnetic composite silk; preparing bulking samarium-doped BiOBr powder by using a combustion method; adding the following components in a reactor in percentages by mass: 70-76% of liquid paraffin and 4-8% of sorbitan monostearate, adding 2-5% of praseodymium-doped BiOBr powder while stirring violently, ultrasonically dispersing for 30 min, adding 16-20% of the porous magnetic composite silk, stirring and reacting, carrying out solid-liquid separation, washing with anhydrous ethanol, and drying to obtain the porous magnetic composite silk-loaded praseodymium-doped BiOBr photocatalyst. The preparation method of the porous magneticcomposite silk-loaded praseodymium-doped BiOBr photocatalyst has the characteristics that the preparation method is simple, the stability of the catalyst is good, and the catalyst can be degraded andis environmentally friendly and the like; and the catalyst is easy to recycle, reaction conditions are gentle, the catalytic activity is high, the use amount is small and the like.

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

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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
CPCB01J31/06B01J31/26B01J35/0033B01J35/004B01J35/06B01J37/0009B01J37/0207B01J37/32C02F1/285C02F1/30C02F2101/30C02F2101/308C02F2101/345C02F2305/10
Inventor 李慧芝王英姿韩斌
Owner UNIV OF JINAN
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