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Porous graphene loaded titanium dioxide composite material and preparation method thereof

A porous graphene, titanium dioxide technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of serious agglomeration, difficult dispersion, and easy falling off of graphene photocatalysts, and achieve excellent light Catalytic degradation performance, improving stability, preventing agglomeration effect

Inactive Publication Date: 2016-12-14
佛山市高明区尚润盈科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Combining titanium dioxide and graphene will improve the photocatalytic performance of titanium dioxide. However, the catalytic efficiency of this photocatalyst is still not ideal. It is easy to fall off during the process, thus affecting the service life and photocatalytic effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A preparation method of porous graphene-supported titanium dioxide composite material, which comprises the following steps:

[0016] (1) Preparation of graphene quantum dot suspension: weigh 0.5g of C60 powder, measure 50ml of 98% concentrated sulfuric acid, mix the C60 powder and concentrated sulfuric acid in a beaker, place the beaker in an ice water bath, and Stir at a speed of 500rpm to obtain a mixed solution; weigh 3g of potassium permanganate powder and slowly add it to the above-mentioned mixed solution; remove the ice water bath, change to a water bath, keep the temperature of the water bath 30-40℃, and react for 5h; add 100~ quickly 200ml of pure water was filtered, and then dialyzed with a dialysis bag with a molecular weight cutoff of 1000 for 3 days to obtain a graphene quantum dot suspension; the graphene quantum dot suspension was stirred at 100 rpm, and the laser was irradiated for 30 min at the same time, and the laser irradiation power was 2W.

[0017] (2) ...

Embodiment 2

[0021] A preparation method of porous graphene-supported titanium dioxide composite material, which comprises the following steps:

[0022] (1) Preparation of graphene quantum dot suspension: Weigh 0.6g C60 powder, measure 80ml of 98% concentrated sulfuric acid, mix C60 powder and concentrated sulfuric acid in a beaker, place the beaker in an ice water bath, and Stir at a speed of 500rpm to obtain a mixed solution; weigh 2g of potassium permanganate powder and slowly add it to the above-mentioned mixed solution; remove the ice-water bath, change to a water bath, keep the temperature of the water bath at 30-40℃, and reverse for 6h; quickly add 200ml pure Water, filtered, and then dialyzed with a dialysis bag with a molecular weight cut-off of 1000 for 3 days to obtain a graphene quantum dot suspension; the graphene quantum dot suspension was stirred at a speed of 100 rpm, and the laser was irradiated for 45 minutes at the same time, and the laser irradiation power was 1.2W.

[0023]...

Embodiment 3

[0027] A preparation method of porous graphene-supported titanium dioxide composite material, which comprises the following steps:

[0028] (1) Preparation of graphene quantum dot suspension: Weigh 0.8g of C60 powder, measure 100ml of 98% concentrated sulfuric acid, mix the C60 powder and concentrated sulfuric acid in a beaker, and place the beaker in an ice-water bath. Stir at a speed of 500rpm to obtain a mixed solution; weigh 0.5g of potassium permanganate powder and slowly add it to the above-mentioned mixed solution; remove the ice-water bath, change to a water bath, keep the temperature of the water bath 30-40℃, and react for 8h; add 200ml quickly Pure water was filtered, and then dialyzed with a dialysis bag with a molecular weight cutoff of 1000 for 3 days to obtain a graphene quantum dot suspension; the graphene quantum dot suspension was stirred at a speed of 100 rpm while the laser was irradiated for 60 minutes, and the laser irradiation power was 1W.

[0029] (2) Add 0....

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Abstract

The invention discloses a porous graphene loaded titanium dioxide composite material and a preparation method thereof. The preparation method includes the steps: (1) preparing graphene quantum dot suspension liquid; (2) preparing loaded titanium dioxide graphene quantum dots; (3) performing surface treatment; (4) preparing the composite material. The graphene quantum dots are used as titanium dioxide carriers, nano titanium dioxide is finally attached onto porous graphene after surface treatment, can be more effectively loaded and fixed and can be prevented from agglomeration, stability of the nano titanium dioxide is remarkably improved, and agglomeration of the composite material is avoided, so that obtained porous graphene / titanium dioxide photocatalysts have excellent photocatalytic degradation performance and can be widely applied to the environmental protection field of sewage treatment and the like.

Description

Technical field [0001] The invention relates to a porous graphene loaded titanium dioxide composite material and a preparation method thereof. Background technique [0002] Graphene, as an allotrope of carbon, is a single-layer two-dimensional crystalline material with a honeycomb structure formed by the sp2 orbital hybridization of carbon atoms. The good mechanical properties and chemical stability of graphene will also be used in composite materials. And other fields have broad application prospects. [0003] Titanium dioxide is a semiconductor material. Due to its non-toxicity and low cost, it is widely used as a photocatalyst in sewage treatment and other fields. The composite of titanium dioxide and graphene will improve the photocatalytic performance of titanium dioxide. However, the catalytic efficiency of this photocatalyst is still not ideal. The resulting graphene / titanium dioxide photocatalyst is severely agglomerated and difficult to disperse; and titanium dioxide and ...

Claims

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Application Information

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IPC IPC(8): B01J21/18
CPCB01J21/063B01J21/18B01J35/39
Inventor 陆庚
Owner 佛山市高明区尚润盈科技有限公司
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