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Three-dimensional porous structure graphene-cerium dioxide composite photocatalyst

A three-dimensional porous, cerium oxide technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical/physical process, etc. The low utilization rate of visible light and other problems can achieve the effect of high light utilization efficiency, stable photocatalytic performance and continuous photocatalytic performance

Active Publication Date: 2016-08-17
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Ceria has photocatalytic properties similar to titanium dioxide, which can make it have broad application prospects in the field of photocatalysis, but its disadvantages are low utilization rate of visible light, poor dispersion when combined with other substances, and easy agglomeration, resulting in its photocatalysis Catalytic performance is affected
Photocatalytic experiments prove that this product overcomes the shortcomings of existing graphene-ceria composite nanoparticles such as easy agglomeration, uneven distribution and low photocatalytic performance

Method used

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  • Three-dimensional porous structure graphene-cerium dioxide composite photocatalyst
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  • Three-dimensional porous structure graphene-cerium dioxide composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In the mixture of 500mg graphite powder and 2.0g sodium nitrate, add 18 ml of concentrated sulfuric acid with a mass concentration of 98%, and stir the reaction for 1 hour at a temperature lower than 5 °C; after that, slowly add it to the reactor within 0.5 hours 3.0g of potassium permanganate powder was reacted for 1.5h at a temperature less than 5°C; the above reaction system was heated to 35°C, kept for 1h, and 40ml of deionized water was added to the reactor after the heat preservation, and then the temperature was raised to 100°C Then, the reaction product was cooled to room temperature, 70 milliliters of deionized water were added to dilute, and then 10 milliliters of hydrogen peroxide solution with a mass concentration of 35% was added to it; Washed with 400 ml of 5% hydrochloric acid three times, then washed with deionized water three times, and finally dialyzed the filter cake with a dialysis bag for two days, then vacuum-dried at 60 ° C for 24 hours, and obtain...

Embodiment 2

[0034] The graphene oxide obtained in Example 1 was weighed to prepare a graphene oxide dispersion, and then a three-dimensional structure of graphene-ceria composite was prepared.

[0035] Preparation of three-dimensional graphene-titania composites

[0036] Disperse 60 mg of graphene oxide obtained in Example 1 in 20 milliliters of deionized water, and sonicate for 2 h; dissolve 60 mg of cerium trichloride into 10 milliliters of water, add it to the above-mentioned graphene oxide dispersion, and then use Pipette pipetting mass concentration is that 100-800 microliters of 28% ammonia water is added therein, and after ultrasonic treatment reaction mixture, put into polytetrafluoroethylene lined autoclave again, react 12 hours at 180 ℃ of temperature, obtain After the hydrogel product is freeze-dried, a three-dimensional graphene-ceria composite photocatalyst is prepared.

Embodiment 3

[0038] The graphene oxide obtained in Example 1 was weighed to prepare a graphene oxide dispersion, and then a three-dimensional structure of graphene-ceria composite was prepared.

[0039] Preparation of three-dimensional graphene-ceria composites

[0040] Disperse 120 mg of graphene oxide prepared in Example 1 in 40 milliliters of deionized water, and ultrasonically treat it for 2.5 h; dissolve 120 mg of cerium trichloride into 20 milliliters of water, add it to the above-mentioned graphene oxide dispersion, and then Pipette the mass concentration with a pipette to be 300 microliters of 28% ammonia water and add it, after ultrasonic treatment of the reaction mixture, put it into a polytetrafluoroethylene lined autoclave again, and react at 180 ° C for 12 hours, the obtained hydrogel After the product is freeze-dried, a three-dimensional graphene-ceria composite photocatalyst is prepared.

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Abstract

The invention discloses a three-dimensional porous structure graphene-cerium dioxide composite photocatalyst. A three-dimensional porous structure graphene-cerium dioxide compound is prepared through hydrothermal reaction of graphene oxide and cerous chloride. The graphene-cerium dioxide compound has excellent photocatalytic performance, is capable of quickly degrading organic pollutants in wastewater, especially pesticides and other organic pollutants into pollution-free materials of H2O, CO2 and the like under the conditions of room temperature, atmospheric pressure and illumination, can be repeatedly utilized for multiple times, and has lasting photocatalytic activity. In addition, the three-dimensional porous structure graphene-cerium dioxide composite photocatalyst can be used as a material for a super capacitor, a lithium-ion battery and a fuel cell and is wide in application prospect.

Description

technical field [0001] The invention relates to a three-dimensional porous structure graphene-ceria composite photocatalyst, and specifically belongs to the technical field of photocatalysts. Background technique [0002] Water pollution is one of the major environmental pollutions, especially the pollution of organic matter in water bodies. Organic pollution has high toxicity, high environmental release rate, and wide impact, which has brought a great degree of harm to human health and the environment. For example, soil quality is degraded, water pollution, and pollutant residues in food exceeding the standard, etc., resulting in the deterioration of the ecological environment. At present, the main sources of water pollution in my country are industrial wastewater, agricultural pesticide wastewater and urban domestic sewage, and the pollution sources in these wastewaters are mainly organic pollutants. Therefore, establishing an effective method for degrading organic pollu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10
CPCB01J23/10B01J35/399B01J35/39
Inventor 谢宇宋健华刘玉应方晶凌云
Owner NANCHANG HANGKONG UNIVERSITY
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