A kind of graphene oxide composite material modified by silver carbonate nanospheres and its preparation method and application

A composite material, silver carbonate technology, applied in chemical instruments and methods, nanotechnology, nano optics, etc., can solve the problems of instability and low catalytic activity, and achieve the effect of improving photocatalytic performance and increasing specific surface area

Inactive Publication Date: 2019-07-05
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Technical problem to be solved: Aiming at the problem that single nano-silver carbonate as a photocatalytic material will show instability and low catalytic activity under light conditions, the invention provides a graphene oxide composite material modified with silver carbonate nanospheres and its The preparation method and application can efficiently photocatalyze the degradation of phenol under visible light, thereby providing a photocatalytic material that can be applied to the degradation of organic pollutants in wastewater treatment systems

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  • A kind of graphene oxide composite material modified by silver carbonate nanospheres and its preparation method and application
  • A kind of graphene oxide composite material modified by silver carbonate nanospheres and its preparation method and application
  • A kind of graphene oxide composite material modified by silver carbonate nanospheres and its preparation method and application

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Embodiment 1

[0026] A graphene oxide composite material modified by silver carbonate nanospheres. Rod-shaped nano-silver carbonate is modified on the surface of graphene oxide through electrostatic self-assembly and then transformed into nanospheres, with an average particle size of about 50nm.

[0027] A preparation method of a graphene oxide composite material modified by silver carbonate nanospheres, the steps are as follows:

[0028] Step 1. Under the condition of avoiding light, add 20ml 3.5mmol / L surfactant cetyltrimethylammonium bromide solution to 20ml 0.1m / L silver nitrate aqueous solution, then add 10ml 0.1m / L of sodium carbonate aqueous solution was transferred to the autoclave after being thoroughly mixed for 1 hour by magnetic stirring.

[0029] Hydrothermal reaction at 70°C for 2 hours, after the product was naturally cooled to room temperature, it was centrifuged and washed with ethanol for 3 times, and finally dried to obtain rod-shaped nano-silver carbonate;

[0030] Ste...

Embodiment 2

[0032] A graphene oxide composite material modified by silver carbonate nanospheres, the rod-shaped nanometer silver carbonate is modified on the surface of graphene oxide and then transformed into nanospheres, with an average particle size of about 100nm.

[0033] A preparation method of a graphene oxide composite material modified by silver carbonate nanospheres, the steps are as follows:

[0034] Step 1. Add 40ml of 3.5mmol / L surfactant cetyltrimethylammonium bromide solution to 40ml of 0.1m / L silver nitrate aqueous solution, and then add 20ml of 0.1m / L of sodium carbonate aqueous solution, fully mixed by magnetic stirring for 1 hour, then transferred to an autoclave, hydrothermally reacted at 70 ° C for 2 hours, after the product was naturally cooled to room temperature, it was washed with ethanol for 3 times, and finally dried to obtain Rod nano-silver carbonate;

[0035] Step 2. Ultrasonically disperse 3.0 mg of graphene oxide in ethylene glycol under light-proof condi...

Embodiment 3

[0037] A graphene oxide composite material modified by silver carbonate nanospheres. After the rod-shaped nano silver carbonate is modified on the surface of graphene oxide, it is transformed into nanospheres with an average particle size of about 70nm.

[0038] A preparation method of a graphene oxide composite material modified by silver carbonate nanospheres, the steps are as follows:

[0039] Step 1. Add 30ml 3.5mmol / L surfactant cetyltrimethylammonium bromide solution to 30ml 0.1m / L silver nitrate aqueous solution, and then add 15ml 0.1m / L of sodium carbonate aqueous solution, fully mixed by magnetic stirring for 1 hour, then transferred to an autoclave, hydrothermally reacted at 70 ° C for 2 hours, after the product was naturally cooled to room temperature, it was washed with ethanol for 3 times, and finally dried to obtain Rod nano-silver carbonate;

[0040] Step 2. Ultrasonically disperse 2.0 mg of graphene oxide in ethylene glycol under light-proof conditions. Take ...

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Abstract

A graphene oxide composite material modified by silver carbonate nano spheres, a preparation method and applications of same. The invention belongs to the technical field of photocatalytic nano-materials. When bar-shaped nano silver carbonate is modified on the surface of graphene oxide, the nano silver carbonate is converted into the form of nano spheres with particle size being 50-100 nm. The preparation method includes the steps of: 1) under a shade condition, adding a surfactant to a silver nitrate solution, dropwise adding sodium carbonate solution, magnetically stirring the solution uniformly and performing a hydrothermal reaction; 2) washing and drying the product to produce bar-shaped nano silver carbonate; and 3) performing mixing reaction to the graphene oxide with the bar-shaped nano silver carbonate, centrifugally washing and drying the product to obtain the final product. The composite material solves the problems of instability, poor repeatability and low catalytic activity of single nano silver carbonate as a photocatalytic material under visible light. The composite material can high-effectively photo-catalytically degrade phenol under the visible light, so that a photo-catalytic material for degradation of organic pollutants in a waste water treatment system can be provided.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic nanomaterials, in particular to a graphene oxide composite material modified by silver carbonate nanospheres and a preparation method and application thereof. Background technique [0002] Photocatalytic degradation is an important technology in the field of water pollution control developed in recent years. It refers to the degradation of organic matter through a series of reactions under the dual action of light and photocatalyst to produce hydroxyl radicals and super oxygen ions with strong oxidizing ability. Decompose organic pollutants, organic matter is gradually oxidized into low-molecular intermediate products, and finally generate carbon dioxide, water and other ions such as nitrate, phosphate, chloride ions, etc., so as to realize the degradation and removal of organic pollutants. The role of photocatalysts in the photodegradation of organic matter cannot be underestimated. Semico...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/232B82Y20/00B82Y30/00C02F1/30C02F101/34
CPCY02W10/37
Inventor 白雪梁禄禹露张琪
Owner HOHAI UNIV
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