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Preparation method of CdS/GO composite material with three-dimensional flowerlike nanostructure

A three-dimensional flower-like, uniform technology, applied in the field of photocatalysis and composite materials, can solve the problems of CdS photocorrosion, etc., and achieve the effect of improving photocatalytic stability, improving photocatalytic activity, and excellent photocatalytic degradation characteristics

Inactive Publication Date: 2017-07-18
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, long-term light exposure can easily cause CdS to be corroded by light.

Method used

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  • Preparation method of CdS/GO composite material with three-dimensional flowerlike nanostructure
  • Preparation method of CdS/GO composite material with three-dimensional flowerlike nanostructure
  • Preparation method of CdS/GO composite material with three-dimensional flowerlike nanostructure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of graphite oxide: Disperse 1.5g of 325 mesh flake graphite, 3g of potassium persulfate and 3g of phosphorus pentoxide into 10mL of concentrated sulfuric acid solution, react at 80~90°C for 24 h, filter the product, wash and dry to obtain pre-oxidized graphite. Disperse 1g of the pre-oxidized graphite synthesized above in the mixed acid formed by 5mL of concentrated sulfuric acid and 15mL of concentrated nitric acid, control the temperature at 0~5°C, add 4g of potassium permanganate under stirring, then raise the temperature to 50~60°C and continue stirring for 10~ After 12 hours, brown-green graphite oxide was obtained; then 5 mL of hydrogen peroxide was added under stirring in an ice bath, and after the solution turned golden yellow, it was washed with hydrochloric acid, washed repeatedly with ethanol and water, centrifuged, and dried to obtain graphite oxide.

[0026] Preparation of three-dimensional flower-like CdS: Add 1mmoL cadmium acetate and 3mmoL th...

Embodiment 2

[0029] The preparation of graphite oxide: with embodiment 1.

[0030] Preparation of three-dimensional flower-like CdS: Add 1mmoL cadmium acetate and 3mmoL thiourea into 50mL deionized water and stir to dissolve them. During this process, slowly add 20mL of pre-configured 10mmoL / L L-aspartic acid solution and continue stirring After 30 min, the homogeneous solution was transferred to a 100 mL reactor and reacted at 180 °C for 4 h. The precipitate was centrifuged, washed with ethanol and distilled water several times, and the product was dried in a 60 °C drying oven for 12 h to obtain three-dimensional flower-like CdS. The removal rate of flower-like CdS for MB was 81.97%.

[0031] Preparation of CdS / GO composite material: Firstly, 0.5mg of dry graphite oxide was firstly ultrasonicated in 5ml of deionized water for 6h to obtain a transparent bright yellow solution; then 50mg of flower-shaped CdS with the best catalytic effect for degradation was weighed and added to it, and the...

Embodiment 3

[0033] The preparation of graphite oxide: with embodiment 1.

[0034]Preparation of three-dimensional flower-like CdS: Add 1mmoL cadmium acetate and 3mmoL thiourea into 50mL deionized water and stir to dissolve them. During this process, slowly add 20mL of pre-configured 15mmoL / L L-aspartic acid solution and continue stirring After 30 min, the homogeneous solution was transferred to a 100 mL reactor and reacted at 180 °C for 4 h. The precipitate was centrifuged, washed with ethanol and distilled water several times, and the product was dried in a 60 °C drying oven for 12 h to obtain three-dimensional flower-like CdS. The removal rate of flower-like CdS for MB was 78.8%.

[0035] Preparation of CdS / GO composite material: 2.5mg of dry graphite oxide was firstly ultrasonicated in 5ml of deionized water for 6h to obtain a transparent bright yellow solution; then 50mg of flower-like CdS with the best catalytic effect degradation was weighed and added to it, and then 40mL was added ...

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Abstract

The invention provides a preparation method of a CdS / GO with a three-dimensional flowerlike nanostructure for photocatalytic degradation of organic pollutants, and belongs to the field of composite materials and the field of photocatalytic application. A three-dimensional flowerlike CdS is formed through hydrothermal synthesis of thiourea and cadmium acetate by adopting an amino acid as a structure-directing agent, so that the photocatalysis ability is obviously higher than that of single CdS; and graphite oxide is introduced into the three-dimensional flowerlike CdS, a well-structured CdS / GO composite material with a flower-like form is obtained through high-temperature reflowing and the CdS / GO composite material has higher visible light absorption efficiency, so that the photocatalytic activity of the three-dimensional flowerlike CdS / GO composite material is further improved, meanwhile, the influence of photocorrosion on a catalyst is greatly reduced, and the photocatalytic stability of the three-dimensional flowerlike CdS / GO composite material is well strengthened. Therefore, the CdS / GO composite material with the three-dimensional flowerlike nanostructure has excellent photocatalytic degradation characteristics in the aspect of organic pollutant degradation, and can be used for degradation of organic matters in dye wastewater.

Description

technical field [0001] The invention relates to a preparation method of a three-dimensional flower-like structure CdS / GO composite material, which is mainly used for photocatalytic degradation of organic pollutants, and belongs to the technical field of composite materials and the field of photocatalytic application. Background technique [0002] my country is a big country in the textile industry. With the vigorous development of the textile industry, dye wastewater has become one of the important sources of water pollution. The traditional methods of treating dye wastewater have certain shortcomings in terms of operation effect or cost. In recent years, photocatalytic oxidation technology has been widely studied as a green water treatment technology with high efficiency, low toxicity, low energy consumption and no secondary pollution, and semiconductor photocatalysts are therefore widely used. [0003] Due to its narrower bandwidth and larger contact area, 3D CdS has been...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J35/10C02F1/30C02F103/30
CPCC02F1/30B01J27/04C02F2103/30C02F2101/308B01J35/39B01J35/61
Inventor 莫尊理高虎虎牛小慧郭瑞斌李振亮
Owner NORTHWEST NORMAL UNIVERSITY
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