Composite photocatalysis material for degrading rhodamine B and preparation method and application of material

A composite material and photocatalytic technology, which is applied in the field of photocatalytic composite materials for degrading rhodamine B and its preparation, can solve the problems of human health and ecosystem threats, difficult to be widely used, and high processing costs, and achieve good reducibility and stability. high catalytic activity and selectivity, easy separation effect

Active Publication Date: 2019-07-05
宿州学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, rhodamine B is the most representative pollutant in colored wastewater. It is difficult to degrade, easy to accumulate, can cause teratogenicity and carcinogenicity, and poses a serious threat to human health and ecosystems.
At present, the treatment methods of Rhodamine B-containing wastewater mainly include adsorption method, Fenton reaction method, ozone oxidation method, electrocatalytic oxidation method, etc. These methods are difficult to be widely used due to high treatment costs or easy to produce secondary pollution.

Method used

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  • Composite photocatalysis material for degrading rhodamine B and preparation method and application of material
  • Composite photocatalysis material for degrading rhodamine B and preparation method and application of material
  • Composite photocatalysis material for degrading rhodamine B and preparation method and application of material

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Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of a photocatalytic composite material for degrading rhodamine B, comprising the following steps:

[0028] S1. Preparation of matrix magnetic Fe 3 o 4 Particles, the specific steps are as follows: Measure 8mL of 0.02mol / L FeCl 3 ·6H 2 0 solution and 8mL of 0.01mol / L FeCl 2 4H 2 0 solution was mixed into a 100mL three-necked flask, mechanically stirred for 5min at a stirring rate of 200rpm, fed with nitrogen as a protective gas and placed in a constant temperature water bath at 60°C, using a peristaltic pump at a rate of 3mL / min under a mechanical stirring condition of 200rpm Add 1 mol / L ammonia water dropwise to the three-necked flask to adjust the pH of the solution to 10, stop adding ammonia water and continue the reaction for 1 hour, so that the magnetic Fe produced by the co-precipitation method 3 o 4 The particle size and shape are more uniform; then the mixed solution is magnetically separated and filtered, washed with deionized water an...

Embodiment 2

[0033] A preparation method of a photocatalytic composite material for degrading rhodamine B, comprising the following steps:

[0034] S1. Preparation of matrix magnetic Fe 3 o 4 Particles: Take 5mL of FeCl with a concentration of 0.03mol / L 3 ·6H 2 O solution and 5 mL of FeCl with a concentration of 0.01 mol / L 2 4H 2 O solution was mixed, mechanically stirred at 200rpm for 5min, under the protection of nitrogen, continued to stir, and under the condition of a constant temperature water bath at a temperature of 50°C, a peristaltic pump was used to drop the substance into the mixed solution at a rate of 3mL / min. The concentration was 1mol / min. L ammoniacal liquor, continue to stir, and the ammoniacal liquor is added dropwise to the pH value of mixed solution to 10, stops dripping ammoniacal liquor and continues reaction 1h, makes the magnetic Fe that co-precipitation method produces 3 o 4 The particle size and shape are more uniform; then the mixed solution is magnetically...

Embodiment 3

[0038] A preparation method of a photocatalytic composite material for degrading rhodamine B, comprising the following steps:

[0039] S1. Preparation of matrix magnetic Fe 3 o 4 Particles: Take 6.5mL of FeCl with a concentration of 0.01mol / L 3 ·6H 2 O solution and 6.5 mL of FeCl with a concentration of 0.01 mol / L 2 4H 2 O solution was mixed, mechanically stirred at 200rpm for 5min, under nitrogen protection, continued to stir, and under the condition of a constant temperature water bath at 70°C, use a peristaltic pump to drop the substance into the mixed solution at 3mL / min with a concentration of 1mol / L ammonia water , continue to stir, add ammonia water dropwise until the pH value of the mixed solution reaches 10, stop dripping ammonia water and continue the reaction for 1 hour, so that the magnetic Fe produced by the co-precipitation method 3 o 4 The particle size and shape are more uniform; then the mixed solution is magnetically separated and filtered, washed with ...

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Abstract

The invention discloses a composite photocatalysis material for degrading rhodamine B. With magnetic Fe3O4 as a substrate, a magnetism technology is combined with high-adsorption and high-activity chitosan (CS), the surface of the substrate is wrapped by the chitosan to obtain magnetic chitosan microspheres, the surface of the chitosan contains rich amidogen and hydroxyl and has high coordinationcapacity, the amidogen and hydroxyl are used for loading Al3+ ions, through NaBH4, the microspheres are subjected to reduction into metal nano particles Al, and the composite photocatalysis material is obtained. The prepared composite photocatalysis material is high in activity, good in dispersion stability and low in cost and is easily separated and recycled, the experiment process is simple, andthe material has important application prospects in the field of catalytic degradation of wastewater with the rhodamine B.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis for environmental functional materials and colored wastewater treatment, and in particular relates to a photocatalytic composite material for degrading rhodamine B and its preparation method and application. Background technique [0002] With the rapid development of modern industry, water pollution is an urgent problem worldwide due to its harmful effects on human health and the environment. Colored wastewater is the main pollutant in industrial parks. On the one hand, colored wastewater seriously affects the visual appearance. On the other hand, it can reduce the penetration of sunlight in the water body and destroy the photosynthesis of aquatic plants. In addition, the deposition and anaerobic decomposition of colored wastewater may produce harmful secondary pollutants. Secondary pollutants, causing water and soil pollution. Colored wastewater mainly comes from many industries such as t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28C02F1/30C02F101/30
CPCB01J31/28B01J35/0033B01J35/004C02F1/30C02F2101/308C02F2305/10
Inventor 张萍花李阳阳王红艳张春丽谢永吴宁
Owner 宿州学院
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