Preparation of porous magnetic composite wool-loaded rhodium-doped BiOBr photocatalyst

A photocatalyst and wool technology, which is applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve the problems of inability to use visible light, poor dispersion, and difficult separation of solutions and other problems, to achieve good physical and chemical stability, excellent mechanical stability, and increase the effect of specific surface area

Inactive Publication Date: 2018-08-17
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Powder photocatalyst has the characteristics of large specific surface, high reaction rate, and easy preparation, but it has disadvantages such as poor dispersion, difficult separation from solution, and difficult recovery, especially for fine particles with micro-nano structure, so the catalyst magnetic Recyclable, conducive to solid-liquid separation and reuse, more convenient for the treatment of organic pollutants in water
BiOBr has great application potential, but its forbidden band width is wide, it can only absorb photons with a wavelength of ≤387nm, and cannot use visible light, which accounts for most of the energy of sunlight.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Preparation of liquid A: In the reaction kettle, add 1-allyl-3-methylimidazolium bromide: 72g, degreased wool: 28g, seal, place in an oven, and the temperature rises to 140±2°C React at constant temperature for 14 h, and cool down to room temperature naturally to prepare liquid A;

[0022] (2) Suspension B preparation: In the reactor, add deionized water: 87 mL, polyvinyl alcohol: 6 g, heat and stir to dissolve, add nano-ferric oxide: 7 g, ultrasonically disperse for 40 min, and cool to room temperature , make B suspension;

[0023] (3) Preparation of porous magnetic composite wool particles: In the reactor, add separately, A solution: 52g, B suspension: 44g, ammonium tetraborate: 1.0g, stir evenly, stir, the temperature rises to 45°C, add brine dropwise : 3mL, placed at 55±2°C for 10 hours, cooled to room temperature, separated from solid and liquid, washed, and repeatedly freeze-dried to obtain porous magnetic composite wool particles;

[0024] (4) Preparation o...

Embodiment 2

[0027] (1) Preparation of liquid A: In the reaction kettle, add 1-allyl-3-methylimidazolium bromide: 75g, degreased wool: 25g, seal, place in an oven, and the temperature rises to 140±2°C React at constant temperature for 13 h, and cool naturally to room temperature to prepare liquid A;

[0028] (2) Suspension B preparation: In the reactor, add deionized water: 85 mL, polyvinyl alcohol: 7 g, heat and stir to dissolve, add nano-ferric oxide: 8 g, ultrasonically disperse for 40 min, cool to room temperature , make B suspension;

[0029](3) Preparation of porous magnetic composite wool particles: In the reactor, add separately, A solution: 50g, B suspension: 43g, ammonium tetraborate: 2g, stir evenly, stir, the temperature rises to 45°C, add brine dropwise: 5mL, keep the temperature at 55±2℃ for 10h, cool to room temperature, separate the solid from the liquid, wash, freeze-dry repeatedly to obtain porous magnetic composite wool particles;

[0030] (4) Preparation of rhodium-do...

Embodiment 3

[0033] (1) Preparation of liquid A: In the reaction kettle, add 1-allyl-3-methylimidazolium bromide: 70g, degreased wool: 30g, seal it, place it in an oven, and raise the temperature to 140±2°C React at constant temperature for 15 h, and cool down to room temperature naturally to prepare liquid A;

[0034] (2) Suspension B preparation: In the reactor, add deionized water: 88 mL, polyvinyl alcohol: 8 g, heat and stir to dissolve, add nano-ferric oxide: 5 g, ultrasonically disperse for 40 min, cool to room temperature , make B suspension;

[0035] (3) Preparation of porous magnetic composite wool particles: In the reactor, add separately, A solution: 54g, B suspension: 42g, ammonium tetraborate: 1.5g, stir evenly, stir, the temperature rises to 45°C, add brine dropwise : 3mL, placed at 55±2°C for 10 hours, cooled to room temperature, separated from solid and liquid, washed, and repeatedly freeze-dried to obtain porous magnetic composite wool particles;

[0036] (4) Preparation...

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PUM

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Abstract

The invention discloses a preparation method of a porous magnetic composite wool-loaded rhodium-doped BiOBr photocatalyst. The preparation method of the porous magnetic composite wool-loaded rhodium-doped BiOBr photocatalyst is characterized by comprising the following steps: dissolving wool by using 1-allyl-3-methylimidazolium bromide and adding polyvinyl alcohol and nano ferroferric oxide to obtain porous magnetic composite wool particles; preparing bulking rhodium-doped BiOBr powder by using a combustion method; and then adding the following components in a reactor in percentages by mass: 72-78% of liquid paraffin and 4-8% of sorbitan fatty acid ester, adding 2-5% of rhodium-doped BiOBr powder while stirring violently, adding 12-18% of porous magnetic composite wool particles, stirringand reacting, carrying out solid-liquid separation, washing with anhydrous ethanol, and drying to obtain the porous magnetic composite wool-loaded rhodium-doped BiOBr photocatalyst. The preparation method of the porous magnetic composite wool-loaded rhodium-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 and is 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 wool-supported rhodium-doped BiOBr photocatalyst and its application in the degradation of organic pollutants. Background technique [0002] Wool is a natural protein fiber. As a raw material for textiles, it has the advantages of strong hygroscopicity, warmth retention, wear resistance, and soft luster. However, it is worth noting that in the wool spinning industry, a large amount of wool is discarded and thrown away during the weaving process. According to reports, there are about 100,000 tons of waste wool in my country every year, which not only leads to the waste of a large amount of wool keratin resources , has also brought certain pressure to environmental protection. In the past, the dissolution of wool was generally made of strong alkali or strong acid solution as a solvent to dissolve stubby or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28B01J35/10C02F1/30C02F101/34C02F101/38
CPCB01J31/28B01J35/004B01J35/10C02F1/30C02F2101/345C02F2101/40
Inventor 李慧芝翟涛韩斌
Owner UNIV OF JINAN
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