Preparation method of titanium dioxide and grapheme composite nanomaterial

A graphene composite and nanomaterial technology, applied in the field of nanomaterials, to avoid multi-step operations, controllable size, and good stability.

Inactive Publication Date: 2014-07-23
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can be operated in one step to prepare high-quality titanium dioxide and graphene composite nanomaterials

Method used

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  • Preparation method of titanium dioxide and grapheme composite nanomaterial

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (~2.5nm)TiO 2 Preparation of graphene composite nanomaterials: Add 5mL GO aqueous solution into a 30mL quartz microwave tube, then add 0.05mL tert-butylamine, and shake evenly. Next, pre-mix 0.075g (0.25mmol) of n-propyl titanate, 0.5mL oleic acid and 5mL toluene in the test tube, add them to the above-mentioned quartz microwave tube, add a magnetic stirrer, seal the quartz tube, Put it into a microwave instrument, set at 150°C, and react for 3h. After the reaction, the quartz microwave tube was naturally cooled to room temperature in a microwave instrument and then taken out. Centrifuge the upper organic phase at a rate of 8000rpm, and the obtained precipitate is TiO 2 Graphene composite nanomaterials.

Embodiment 2

[0023] (~6.7nm)TiO 2 Preparation of graphene composite nanomaterials: Add 5mL GO aqueous solution into a 30mL quartz microwave tube, then add 0.05mL tert-butylamine, and shake evenly. Next, pre-mix 0.075g (0.25mmol) of n-propyl titanate, 0.5mL oleic acid and 5mL toluene in the test tube, add them to the above-mentioned quartz microwave tube, add a magnetic stirrer, seal the quartz tube, Put it into a microwave instrument, set at 150°C, and react for 6h. After the reaction, the quartz microwave tube was naturally cooled to room temperature in a microwave instrument and then taken out. Centrifuge the upper organic phase at a rate of 8000rpm, and the obtained precipitate is TiO 2 Graphene composite nanomaterials.

Embodiment 3

[0025] (~8.4nm)TiO 2 Preparation of graphene composite nanomaterials: Add 5mL GO aqueous solution into a 30mL quartz microwave tube, then add 0.05mL tert-butylamine, and shake evenly. Next, pre-mix 0.075g (0.25mmol) of n-propyl titanate, 0.5mL oleic acid and 5mL toluene in the test tube, add them to the above-mentioned quartz microwave tube, add a magnetic stirrer, seal the quartz tube, Put it into a microwave instrument, set at 150°C, and react for 9 hours. After the reaction, the quartz microwave tube was naturally cooled to room temperature in a microwave instrument and then taken out. Centrifuge the upper organic phase at a rate of 8000rpm, and the obtained precipitate is TiO 2 Graphene composite nanomaterials.

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Abstract

The invention provides a preparation method of a titanium dioxide and grapheme composite nanomaterial. The method comprises the following steps: taking and mixing a graphene oxide aqueous solution and tert-butylamine so as to obtain mixed liquid, mixing the obtained mixed liquid with a titanium precursor solution, carrying out magnetic stirring on the obtained mixture under the condition that the obtained mixture is heated to 120-200 DEG C by way of microwave-assisted heating, carrying out a reaction on the obtained product so as to obtain an organic phase solution, and separating the titanium dioxide and grapheme composite nanomaterial from the organic phase solution, wherein the titanium precursor solution is composed of titanium propoxide, an organic coating agent and toluene. The method is used for preparing high-quality titanium dioxide and grapheme composite nanomaterial. The high quality means that nanoparticles are good in crystallinity, narrow in particle size distribution, and controllable in size; nanoparticles can be uniformly dispersed on the surface of grapheme in the composite material, do not fall off, are not agglomerated, and are good in stability.

Description

technical field [0001] The present invention relates to a kind of TiO 2 The invention discloses a preparation method of a graphene composite nano material, which belongs to the field of nano materials. Background technique [0002] Over the past two decades, TiO 2 The preparation of nanocrystals has been widely studied, and many preparation methods have been developed, such as hydrolytic sol-gel, non-hydrolytic sol-gel, hydrothermal, solvothermal and microemulsion methods. However, TiO prepared by these methods 2 Nanocrystals either have poor crystallinity, or have poor size controllability and wide particle size distribution. [0003] Graphene is a two-dimensional planar structure composed of carbon atoms closely packed to form a honeycomb. It is the basic unit of carbon allotropes including zero-dimensional fullerenes, one-dimensional carbon nanotubes, and three-dimensional diamonds. Since Geim first reported independently existing graphene in 2004, its excellent perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053C01B31/04B82Y30/00B82Y40/00C01B32/184
Inventor 马晓波汪联辉韦玮
Owner NANJING UNIV OF POSTS & TELECOMM
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