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Titanium dioxide/sulfonated oxidized graphene/silver nanoparticle composite film and preparation method and application thereof

A technology of silver nanoparticles and titanium dioxide, applied in the direction of titanium oxide/hydroxide, titanium dioxide, chemical instruments and methods, etc., can solve the problems of rare materials and achieve low cost, superior oil/water separation performance, and easy to obtain effects

Active Publication Date: 2018-04-10
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, materials that achieve emulsion separation and organic dye degradation in one step are relatively rare.

Method used

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  • Titanium dioxide/sulfonated oxidized graphene/silver nanoparticle composite film and preparation method and application thereof
  • Titanium dioxide/sulfonated oxidized graphene/silver nanoparticle composite film and preparation method and application thereof
  • Titanium dioxide/sulfonated oxidized graphene/silver nanoparticle composite film and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment one: the preparation of sulfonated graphene oxide, the specific steps are as follows:

[0044] Mix 180ml of concentrated sulfuric acid and 20ml of concentrated phosphoric acid (180:20) evenly, accurately weigh 1.5g of graphite flakes, and mix and stir for 15 minutes. Weigh 9g of potassium permanganate again, and add it slowly while stirring. It was then stirred for 12 hours in an oil bath at 50°C. After cooling to room temperature, pour it into 200 ml of ice water, add an appropriate amount of hydrogen peroxide until the solution turns yellow, wash with 5% hydrochloric acid solution for 3 times after centrifugation, and then wash with deionized water several times until the pH is 5 to 6. Dialyze for another week, change the water frequently every day, and finally put it into a watch glass and freeze it at -40 degrees Celsius, and then vacuum dry it until it becomes fluffy.

[0045]Mix 200mg of graphene oxide, 3g of sodium chloroethylsulfonate, and 1.6g of s...

Embodiment 2

[0046] Embodiment two: the preparation of silver nanoparticles and sulfonated graphene oxide composite material, concrete steps are as follows:

[0047] Add 4 ml of silver nitrate aqueous solution (0.2 M) into a beaker containing 20 ml of sulfonated graphene oxide dispersion (1 mg / ml), and stir magnetically for 3 hours (25 degrees Celsius). Then 2 ml of ascorbic acid (0.5M) was quickly added to the mixture, and magnetic stirring was continued for 1 hour. The reactants were centrifuged and washed with ultrapure water for several times. The final product silver nanoparticles / sulfonated graphene oxide composite was dispersed in 20 ml of in ultrapure water; figure 1 It is a scanning electron microscope image of silver nanoparticles and sulfonated graphene oxide composite material, and the distribution of nanoparticles can be seen through the picture.

Embodiment 3

[0048] Embodiment three: the preparation of titanium dioxide nanorod array, concrete steps are as follows:

[0049] The cleaned copper mesh was placed in a reaction kettle, and 2.5 ml of tetra-n-butyl titanate, 12.5 ml of glycerin, and 37.5 ml of ethanol were added, mixed evenly, and reacted at 180 degrees Celsius for 24 hours to obtain a metal mesh with titanium dioxide nanoclusters; then The titanium dioxide nanocluster network was ultrasonically cleaned with sulfuric acid (0.5M) and acetone, respectively, and then subjected to hydrothermal treatment; 4.05 ml of titanium trichloride, 31 ml of supersaturated sodium chloride solution and 0.3 g of urea, the mixed solution was placed Put the cleaned net against the wall of the kettle, react at 160 degrees Celsius for 2 hours, then take out the sample and immerse it in sulfuric acid for 5 minutes, then wash it with distilled water and ethanol for 3 times, and dry the sample in vacuum at 60 degrees Celsius for 10 hours ; attached ...

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Abstract

The invention discloses a titanium dioxide / sulfonated oxidized graphene / silver nanoparticle composite film and a preparation method and application thereof. The method comprises the steps of evenly mixing oxidized graphene, chloroethanesulfonic acid sodium salt and sodium hydroxide with water and then adding concentrated nitric acid to conduct a reaction to obtain sulfonated oxidized graphene; mixing an aqueous solution of the sulfonated oxidized graphene and a silver nitrate aqueous solution, stirring the mixture in a dark place, adding ascorbic acid and continuing stirring to obtain a silvernanoparticle / sulfonated oxidized graphene composite; dispersing the silver nanoparticle / sulfonated oxidized graphene composite into the water, and laying the silver nanoparticle / sulfonated oxidized graphene composite onto a titanium dioxide nanorod array through vacuum deposition and obtaining the titanium dioxide / sulfonated oxidized graphene / silver nanoparticle composite film through vacuum drying. The titanium dioxide / sulfonated oxidized graphene / silver nanoparticle composite film has the photocatalytic effect under ultraviolet light, has special wettability and underwater super-oleophobic / under-oil super-hydrophobic properties and can separate and degrade oil-water emulsion in situ to achieve extensive application in the aspects of effluent oil treatment and oil-water emulsion separation.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and relates to the preparation and application of an underwater super-oleophobic / sub-oil super-hydrophobic composite membrane material with special wettability, specifically relates to titanium dioxide / sulfonated graphene oxide / silver nanoparticle composite Membrane and its preparation method and application. Background technique [0002] Global water pollution has brought increasing attention to wastewater treatment and renewable energy industries, and various materials have been developed to remove pollutants from water. However, materials that achieve emulsion separation and organic dye degradation in one step are relatively rare. Contents of the invention [0003] The purpose of the present invention is to prepare the copper mesh of titanium dioxide nanorod arrays by solvothermal and hydrothermal methods, reduce the silver nanoparticles on the surface of sulfonated graphene ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/12C23C26/00B01J27/02B22F1/054
CPCB01J27/02C23C18/1216C23C26/00B22F1/054B01J35/39B01D71/022B01D71/0211B01D69/12B01D67/0041B01D71/024C01B32/198C01P2004/03C01G23/053C01G23/0536C01P2004/16C22C5/06B22F9/24B22F2007/042C02F2305/08C02F1/725C02F2305/10C02F2101/308C02F2101/325C02F1/44C02F1/32B82Y30/00B82Y40/00B01D67/00042B01D67/00043B22F2301/255B01D67/0072B01D67/0076C01G23/08B22F9/18C02F1/00B01D17/00
Inventor 路建美陈冬赟蒋军
Owner SUZHOU UNIV
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