Graphene/titanate nanometer composite visible-light activated photocatalyst and preparation method thereof

A nanocomposite and photocatalyst technology, applied in the field of nanocomposite materials and photocatalysis, to achieve the effects of good surface morphology, enhanced visible light catalytic performance, and large specific surface area

Inactive Publication Date: 2013-01-02
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] From the above literature research, it can be found that although there have been reports on the preparation of strontium titanate, barium titanate and calcium titanate with various structures by hydrothermal method using different raw mat

Method used

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  • Graphene/titanate nanometer composite visible-light activated photocatalyst and preparation method thereof
  • Graphene/titanate nanometer composite visible-light activated photocatalyst and preparation method thereof
  • Graphene/titanate nanometer composite visible-light activated photocatalyst and preparation method thereof

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Experimental program
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Example Embodiment

[0031] Example 1

[0032]Dissolve 2.55 mL of tetrabutyl titanate in 20 mL of absolute ethanol, add ammonia aqueous solution under stirring, filter and wash to obtain titanium oxyhydroxide precipitate. Dissolve 4.76 g of barium nitrate and 2.1 g of potassium hydroxide, respectively, in 10 mL of deionized water. 20 mg of graphene oxide was sonicated in 20 mL of deionized water for 3 h, and then an aqueous barium nitrate solution was added and stirred for another 8 h. The oxyhydroxide precipitation of titanium, barium nitrate and graphene oxide solution were mixed and stirred for 30 minutes, then potassium hydroxide aqueous solution was added and stirred for 10 minutes, then transferred to the inner tank of the reactor with a volume of 100 mL, and the reaction was adjusted with deionized water. The volume of the reaction material in the inner tank of the kettle reaches 75% of the volume of the inner tank of the reaction kettle, and then it is placed in a stainless steel jacket, ...

Example Embodiment

[0033] Example 2

[0034] Dissolve 2.55 mL of tetrabutyl titanate in 20 mL of absolute ethanol, add ammonia aqueous solution under stirring, filter and wash to obtain titanium oxyhydroxide precipitate. Dissolve 4.76 g of barium nitrate and 2.1 g of potassium hydroxide, respectively, in 10 mL of deionized water. 50 mg of graphene oxide was sonicated in 20 mL of deionized water for 4 h, and then an aqueous solution of barium nitrate was added and stirred for another 10 h. The oxyhydroxide precipitation of titanium, barium nitrate and graphene oxide solution were mixed and stirred for 30 minutes, then potassium hydroxide aqueous solution was added and stirred for 10 minutes, then transferred to the inner tank of the reactor with a volume of 100 mL, and the reaction was adjusted with deionized water. The volume of the reaction material in the inner liner of the kettle reaches 75% of the volume of the inner liner of the reactor, and then it is placed in a stainless steel jacket, s...

Example Embodiment

[0035] Example 3

[0036] Dissolve 2.55 mL of tetrabutyl titanate in 20 mL of absolute ethanol, add ammonia aqueous solution under stirring, filter and wash to obtain titanium oxyhydroxide precipitate. Dissolve 4.76 g of barium nitrate and 2.1 g of potassium hydroxide, respectively, in 10 mL of deionized water. 100 mg of graphene oxide was sonicated in 20 mL of deionized water for 5 h, and then an aqueous solution of barium nitrate was added and stirred for another 10 h. The oxyhydroxide precipitation of titanium, barium nitrate and graphene oxide solution were mixed and stirred for 30 minutes, then the potassium hydroxide aqueous solution was added and stirred for 10 minutes, then transferred into the inner tank of a 100 mL reactor, and the reactor was adjusted with deionized water. The volume of the reaction material in the inner tank reaches 75% of the volume of the inner tank of the reaction kettle, and then placed in a stainless steel jacket, sealed, and kept at 180 ° C ...

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Abstract

The invention discloses a graphene/titanate nanometer composite visible-light activated photocatalyst and a preparation method thereof, and belongs to the fields of nanometer composite materials and photocatalysis technology. The composite photocatalyst is prepared by compounding titanate and graphene, and the preparation method comprises the following steps: reacting tetrabutyl titanate with ammonia water to obtain a titanium hydroxyl compound; performing ultrasonic dispersion of graphene oxide in water, adding nitrate, stirring, mixing with the titanium hydroxyl compound and a potassium hydroxide aqueous solution, stirring, finally transferring the mixed solution into a reaction vessel to perform a hydrothermal reaction, after the reaction, performing centrifugation, filtration, washing, and vacuum drying of the product to obtain the composite photocatalyst. Photocatalytic degradation experiments show that the graphene/titanate composite photocatalyst prepared by the method has good photocatalytic degradation effect on rhodamine B under visible light irradiation. The photocatalyst of the invention has the advantages of relatively simple operation process, controllable morphology, no requirements for other reducing agents, and good visible-light activated photocatalysis performance.

Description

technical field [0001] The invention relates to a graphene / titanate nanocomposite visible light catalyst and a preparation method thereof, in particular to a method for preparing a graphene / titanate nanocomposite visible light catalyst by a hydrothermal method, belonging to the technical field of nanocomposite materials and photocatalysis . Background technique [0002] At present, the world is seriously polluted. my country is the largest country in the production and consumption of dyestuffs in the world. The pollution of dyestuffs and printing and dyeing wastewater is large and widespread. These wastewaters are one of the industrial wastewaters that are difficult to treat. It has the characteristics of complex chemical composition and difficult biochemical degradation; in recent years, the use of photocatalytic technology to degrade dye wastewater has become a research hotspot. Photocatalytic technology has the advantages of non-toxic, harmless, low cost, high activity...

Claims

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Application Information

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IPC IPC(8): B01J23/02B01J35/10
Inventor 张蓉仙杨小飞李扬高庆侠严学华夏娴娴刘恒
Owner JIANGSU UNIV
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