Preparation method and application of graphene/cellulose/titanium dioxide composite material

A technology of titanium dioxide and nanocomposite materials is applied in the field of preparation of graphene/cellulose/titanium dioxide nanocomposite materials, and can solve the problems of excessive amount of adsorbent, low adsorption rate, long adsorption time, etc.

Inactive Publication Date: 2016-01-20
JIANGSU UNIV
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Problems solved by technology

[0007] Journal of Textile Science, 2011, 32 (4): 23-28, reported the preparation and catalytic performance of titanium dioxide / carbon fiber porous film, the results showed that the amount of adsorbent was too much, up to 5g / L, the adsorption time was long, and the adsorption rate not tall

Method used

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Examples

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Effect test

preparation example Construction

[0027] The preparation steps of graphite oxide include:

[0028] Add 23mL concentrated H 2 SO 4 Put it in a beaker and place it in an ice-water bath at 0°C for 10 minutes; slowly add 0.5g of sodium nitrate, 1g of natural graphite powder and 3g of potassium permanganate in sequence, and react for 1h at a temperature lower than 20°C. The mixture is dark green, and the system is heated to 35°C, continue to stir for 2h; then, heat up to 90°C, the mixture turns brown; slowly add 46mL of deionized water dropwise with a normal pressure funnel, the mixture turns from brown to bright yellow, and then react in an oil bath at 100°C for 2h; Stop heating, then add 140mL H 2 O and 10mL30%H 2 o 2 , mixed and then centrifuged, washed with 5% hydrochloric acid solution, and finally the centrifuged product was dried in a vacuum oven at 60°C for 24 hours to obtain graphite oxide.

Embodiment 1

[0030] (1) Add 0.6g of graphite oxide into 60g of deionized water, and sonicate for 0.5h. 1.2 g of sodium borohydride was added to the graphene oxide solution after ultrasonic exfoliation, and the mixture was reacted at 35° C. for 0.5 h. After the reaction was finished, the reaction product was filtered by suction, and the filter cake was washed three times with secondary deionized water, and the black substance obtained was collected, and was collected at 50 o C under vacuum drying product promptly obtains graphene.

[0031] (2) Weigh 0.3g of graphene into 30g of deionized water and ultrasonically disperse for 0.5h; put 0.2g of cellulose into 80g of deionized water and ultrasonically disperse for 0.5h.

[0032](3) Pour the dispersed cellulose solution into a three-necked flask, add 1.0 g of mesoporous titanium dioxide powder to it, and mechanically stir in a water bath at 20°C for 0.5 h to load the titanium dioxide on the cellulose. Then, the ultrasonically dispersed graphe...

Embodiment 2

[0035] (1) Add 0.6g of graphite oxide into 120g of deionized water, and ultrasonicate for 1h. 3 g of sodium borohydride was added to the graphene oxide solution after ultrasonic exfoliation, and the mixture was reacted at 50° C. for 2 h. After the reaction was finished, the reaction product was filtered by suction, and the filter cake was washed three times with secondary deionized water, and the black substance obtained was collected, and was collected at 50 o C under vacuum drying product promptly obtains graphene.

[0036] (2) Weigh 0.3 g of graphene and ultrasonically disperse it into 60 g of deionized water, and ultrasonically disperse for 1 h; put 0.15 g of cellulose into 105 g of deionized water and ultrasonically disperse for 1 h.

[0037] (3) Pour the dispersed cellulose solution into a three-necked flask, add 0.05 g of mesoporous titanium dioxide powder therein, and mechanically stir and react in a water bath at 30° C. for 2 hours to load the titanium dioxide on the...

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Abstract

The invention belongs to the field of synthesis of nano materials, relates to the preparation of graphene/mesoporous oxide series of nano composite material, and particularly relates to a preparation method and application of graphene/cellulose/titanium dioxide composite material. The graphene/cellulose/titanium dioxide composite material is prepared by preparing graphite oxide by utilizing an improved Hummers method, carrying out ultrasound to obtain graphene oxide, reducing graphene oxide into graphene by using sodium borohydride; and finally uniformly mixing cellulose, titanium dioxide, a surface active agent (hexadecyl trimethyl ammonium bromide) and grephene. According to the invention, the synthesis method is simple, the prepared graphene/cellulose/titanium dioxide composite material is taken as an adsorbent, and a malachite green dye solution is taken as an adsorption object, the experiment shows that the composite material has an excellent adsorption removal effect. The composite material is applied to the treatment of dyes in sewage water, has the advantages of simplicity in operation, convenience, easiness in availability, high adsorption rate and the like, and has good industrially practical value.

Description

technical field [0001] The invention belongs to the field of nanomaterial synthesis, and relates to the preparation of graphene / mesoporous oxide series nanocomposite materials, in particular to a preparation method and application of graphene / cellulose / titanium dioxide nanocomposite materials. Background technique [0002] With the development of dye production and printing and dyeing industry, the discharge of dye-containing industrial wastewater has increased dramatically. According to the survey, 160 million cubic meters of dye wastewater is discharged into the natural environment every year in China. Dye wastewater is one of the most difficult industrial wastewater to treat, because of its complex composition, great harm and high potential danger. The components of dye wastewater are significantly different, with high organic content and large chroma, and most of them are aromatic hydrocarbons and heterocyclic compounds. Printing and dyeing wastewater contains a large ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C01B31/04
Inventor 邱凤仙赵浩闫洁李欣杨冬亚
Owner JIANGSU UNIV
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