Preparation method of graphene photocatalyst, product and application

A photocatalyst and graphene technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve low quantum yields, limited applications, and no micro Problems such as photocatalysts for pollutants, to achieve the effect of increasing the level of free radicals, fast electron transfer rate, and good solar light absorption performance

Inactive Publication Date: 2021-09-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Anthraquinone-2-sodium sulfonate (AQ2S) is a common photosensitizer with good photochemical activity, low cost, stable chemical properties, and can generate active chlorine free in water with high chloride ion concentration under sunlight However, its water solubility and low quantum yield limit its practical application. How to apply it in water through heterogeneous phase and improve the activity of AQ2S is the focus of researchers.
However, there has been no report on the preparation of photocatalysts for degrading micro-pollutants in wastewater using sodium anthraquinone-2-sulfonate and graphene oxide as raw materials.

Method used

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  • Preparation method of graphene photocatalyst, product and application
  • Preparation method of graphene photocatalyst, product and application
  • Preparation method of graphene photocatalyst, product and application

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Experimental program
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Embodiment 1

[0042] The preparation of anthraquinone-2-sodium sulfonate / graphene airgel photocatalyst comprises the following steps:

[0043] Disperse 0.050g graphene oxide (GO) in 25mL deionized water, and disperse evenly by ultrasonication for 120min to obtain a graphene oxide dispersion; add 0.0050g anthraquinone-2-sodium sulfonate (AQ2S) to the graphene oxide dispersion , and then magnetically stirred for 6 hours to disperse evenly to obtain a composite solution; put the composite solution into a 50mL stainless steel hydrothermal reactor and heat at 180°C for 12h; wash the hydrogel formed after the reaction with deionized water, Freeze-dry for 24 hours to obtain sodium anthraquinone-2-sulfonate / graphene airgel photocatalyst (AQ2S@rGO).

Embodiment 2

[0045] The preparation of anthraquinone-2-sodium sulfonate / graphene airgel photocatalyst, the steps are as follows:

[0046]Disperse 0.50g GO in 500mL deionized water and disperse evenly by ultrasonication for 100min to obtain a graphene oxide dispersion; add 0.0050g AQ2S to the graphene oxide dispersion, and then magnetically stir for 6h to disperse evenly to obtain a composite solution; Put it into a stainless steel hydrothermal reactor and heat at 120°C for 15h; the hydrogel formed after the reaction was washed with deionized water, and freeze-dried at -50°C for 24h to obtain AQ2S@rGO.

Embodiment 3

[0048] The preparation of anthraquinone-2-sodium sulfonate / graphene airgel photocatalyst comprises the following steps:

[0049] Disperse 0.250g GO in 50mL deionized water and disperse evenly by ultrasonication for 150min to obtain a graphene oxide dispersion; add 0.0050g AQ2S to the graphene oxide dispersion, and then magnetically stir for 6h to disperse evenly to obtain a composite solution; Put it into a stainless steel hydrothermal reactor and heat at 200°C for 10h; the hydrogel formed after the reaction was washed with deionized water, and freeze-dried at -50°C for 24h to obtain AQ2S@rGO.

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Abstract

The invention discloses a preparation method of a graphene photocatalyst, a product and application, and belongs to the technical field of photocatalysts. The preparation method comprises the following steps: adding graphene oxide into water to be dispersed, and obtaining graphene oxide dispersion liquid; adding anthraquinone-2-sodium sulfonate into the graphene oxide dispersion liquid to obtain a composite solution, then heating to obtain hydrogel, and then washing and freeze-drying; the photocatalyst prepared by the method has a relatively large specific surface area and aperture, can enrich micropollutants in water, has a relatively high electron transfer rate and good sunlight absorption performance, has a very good purification effect on the micropollutants in a high-salinity water body, especially has a sulfadiazine removal rate of 99%, and has good application prospects in the fields of high-salinity water body purification and the like.

Description

technical field [0001] The invention belongs to the technical field of photocatalysts, and in particular relates to a preparation method, product and application of graphene photocatalysts. Background technique [0002] With the rapid development of the economy and the emphasis on human health, pharmaceuticals and personal care products (PPCPs) are widely used. These compounds cannot be completely absorbed by animals and humans, and are often excreted with feces and urine, resulting in the presence of excess in water. Micropollutants such as antibiotics, tranquilizers, steroids, and endocrine disruptors. Among them, the abuse of antibiotics is a serious problem. Antibiotics will produce drug-resistant bacteria, threatening the health of the ecosystem and human body. How to efficiently remove antibiotics from water is a hot scientific issue in recent years. At present, the methods for removing antibiotics mainly include biological methods, chemical oxidation, physical adsorp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02C02F1/30C02F1/72C02F1/76C02F101/38
CPCB01J35/004B01J31/0229B01J31/0225B01J35/0013C02F1/30C02F1/76C02F1/725C02F2305/10C02F2101/40
Inventor 杨珊珊丁杰刘冰峰陈成新孙汉钧
Owner HARBIN INST OF TECH
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