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Graphene/modified titanium dioxide nano sol composite material and preparation method thereof

A titanium dioxide and nano-sol technology, applied in titanium dioxide, graphene, chemical instruments and methods, etc., can solve the problems of uneven size and distribution of nanoparticles, affect product performance, consume large heat energy, etc., and achieve large-scale industrial production, The effect of chemical and thermal stability, optimized performance

Active Publication Date: 2012-06-20
重庆天渝新材料技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The size and distribution of most nanoparticles are not uniform, and it is difficult to effectively control them
In the preparation process, most of the reducing agents are highly toxic, flammable and explosive dangerous drugs, and the reaction process is generally in a high-temperature environment, which requires a large amount of heat energy consumption
During the application process, due to uneven distribution, a large number of particles agglomerated, reaction deactivation and other phenomena seriously affect the performance of the product

Method used

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  • Graphene/modified titanium dioxide nano sol composite material and preparation method thereof
  • Graphene/modified titanium dioxide nano sol composite material and preparation method thereof

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preparation example Construction

[0032] The present invention also provides a preparation method of graphene / modified titanium dioxide nano-sol composite material, comprising:

[0033] Provide titanium dioxide nano-sol and graphene;

[0034] Using chloroauric acid as raw material, mercaptan as surfactant, and tetraoctyl ammonium bromide as phase transfer agent, a reduction reaction occurs under the action of mercaptocarboxylic acid and sodium borohydride to obtain a modified gold nano-sol;

[0035] The modified gold nano sol and the titanium dioxide nano sol are respectively dispersed in an organic solvent and then mixed to obtain a titanium dioxide sol modified with the gold nano sol.

[0036] The titanium dioxide sol modified by the gold nano sol is mixed with the toluene solution of the graphene, dispersed uniformly and then filtered to obtain the graphene / modified titanium dioxide sol composite material,

[0037] According to the present invention, titanium dioxide nano-sol and graphene are firstly provi...

Embodiment 1

[0051] Add 100mL concentrated sulfuric acid to a dry beaker, cool with ice water, add 10g graphite and 10g NaNO while stirring 3 The mixture was stirred rapidly, and 30g KMnO was slowly added after 15min 4 powder, while controlling the temperature below 20°C, to be KMnO 4 After the addition, remove the water bath, strictly control the temperature of the mixture within the range of 35±3°C and continue to stir for 5 hours, slowly add 460mL of deionized water to raise the temperature to 98°C, maintain this temperature for 15min, and dilute to 1400mL with warm water , pour a certain amount of hydrogen peroxide aqueous solution (30%), centrifuge while hot and filter, wash the filter cake with 5% HCl solution, and wash with deionized water until the filtrate is neutral.

[0052] Disperse 0.15g of TTIP and 5mL of oleic acid in toluene, dissolve 0.1mL of tert-butylamine in water, mix the toluene solution of TTIP and oleic acid with the aqueous solution of tert-butylamine in a 50mL re...

Embodiment 2

[0058] Add 100mL concentrated sulfuric acid to a dry beaker, cool with ice water, add a mixture of 10g graphite and 10g NaNO3 while stirring, stir rapidly, and slowly add 30gKMnO after 15min 4 powder, while controlling the temperature below 20°C, to be KMnO 4 After the addition, remove the water bath, strictly control the temperature of the mixture within the range of 35±3°C and continue to stir for 5 hours, slowly add 460mL of deionized water to raise the temperature to 98°C, maintain this temperature for 15min, and dilute to 1400mL with warm water , pour a certain amount of hydrogen peroxide aqueous solution (30%), centrifuge while hot and filter, wash the filter cake with 5% HCl solution, and wash with deionized water until the filtrate is neutral.

[0059] Disperse 0.15g of TTIP and 5mL of oleic acid in toluene, dissolve 0.1mL of tert-butylamine in water, mix the toluene solution of TTIP and oleic acid with the aqueous solution of tert-butylamine in a 50mL reactor, heat to...

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Abstract

The invention provides a preparation method of a graphene / modified titanium dioxide sol composite material. The preparation method is characterized by comprising the steps of: providing titanium dioxide nano sol and graphene; carrying out a reduction reaction under the action of mercapto carboxylic acid and sodium borohydride with auric chloride acid as a raw material, thiol as a surfactant and tetraoctyl ammonium bromide as a phase transfer agent to obtain modified gold nano sol; respectively dispersing the modified gold nano sol and the titanium dioxide nano sol in organic solvents, and mixing to obtain gold nano sol modified titanium dioxide sol; and mixing the gold nano sol modified titanium dioxide sol with a toluene solution of graphene, uniformly dispersing and filtering to obtain the graphene / modified titanium dioxide sol composite material. The modified titanium dioxide nano sol can be uniformly dispersed on the surface of graphene and does not agglomerate.

Description

technical field [0001] The invention relates to the field of preparation of inorganic composite materials, in particular to a graphene / modified titanium dioxide nano-sol composite material and a preparation method thereof. Background technique [0002] Titanium dioxide nano-sol and gold nano-particles have good multi-sensitivity and are used in chemical industry, medicine, machinery, catalysis, molecular biology, biosensor and other fields. With the development of science and technology, titanium dioxide nano-sol and gold nano-sol will be applied to more fields. Titanium dioxide nano-sol can be used in sewage treatment, air purification treatment, product surface antibacterial treatment, glass coating treatment and other fields. [0003] The preparation method of titanium dioxide nano-sol in the prior art is: tetrapropyl titanate (titanium (iv) n-propoxide abbreviation TTIP) is dispersed in the oily phase that toluene or hexanaphthene form, tert-butylamine (tert-butylamine)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00C01G23/047C01B31/04C01B32/184
Inventor 张育新董萌郝晓东宋宏方李新禄黄佳木
Owner 重庆天渝新材料技术研究院有限公司
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