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Graphene/titanium dioxide composite porous material, preparation method and application thereof

A technology of titanium dioxide and porous materials, applied in the field of porous materials, can solve the problems of high experimental cost and high energy consumption, and achieve the effects of simple preparation method, simple preparation process and easy industrialized preparation

Inactive Publication Date: 2014-11-19
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, graphene / titanium dioxide composite materials are prepared by using relatively expensive n-butyl titanate, isopropanol titanate, etc. as titanium sources, through hydrothermal hydrolysis, and finally obtaining graphene / titanium dioxide composite materials after high-temperature sintering. high, high energy consumption

Method used

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  • Graphene/titanium dioxide composite porous material, preparation method and application thereof
  • Graphene/titanium dioxide composite porous material, preparation method and application thereof
  • Graphene/titanium dioxide composite porous material, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Prepare 10 mg / mL linear styrene-butadiene-styrene triblock polymer in butanone micelle solution and 0.5 mg / mL graphene oxide in N,N-dimethylformamide solution, and mix them in equal volume. uniform. Add titanium dioxide to the mixed solution, and ensure that its concentration is 5 mg / mL, and sonicate uniformly. The above mixed solution is cast on a glass carrier plate placed in a saturated atmosphere of a precipitant such as ethanol, and is kept at rest until the solution is completely volatilized to form a film. The membrane together with the conductive glass was calcined at 500 °C for 4 h in a nitrogen atmosphere to obtain a graphene / titania composite porous material. The prepared graphene-titania composite porous material together with the carrier plate was placed in liquid nitrogen for quenching, and after a few minutes, it was taken out and brittle fracture. The surface and section of the film were sprayed with gold and observed under an electron microscope.

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Embodiment 2

[0039] First, prepare 10 mg / mL styrene-isoprene block polymer solution in tetrahydrofuran and 0.5 mg / mL graphene oxide solution in N,N-dimethylformamide, and mix them in equal volumes. Subsequent experimental steps are the same as in Example 1.

[0040] The scanning electron microscope picture of the graphene / titania composite porous material prepared by Example 2 is shown in figure 2 .

Embodiment 3

[0042] First, prepare a tetrahydrofuran solution of 20 mg / mL star-shaped styrene-butadiene-styrene triblock copolymer and a N,N-dimethylformamide solution of 2 mg / mL graphene oxide in a volume ratio of 1:2 Mix; then add nano-titanium dioxide, and ensure that its concentration is 10mg / mL, and then sonicate uniformly. The above mixed solution is cast on a glass carrier plate placed in a saturated atmosphere of a precipitating agent such as methanol, and is kept at rest until the solution is completely volatilized to form a film. Subsequent experimental steps are the same as in Example 1.

[0043] The scanning electron microscope picture of the graphene / titania composite porous material prepared by Example 3 is shown in image 3 and 4 .

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Abstract

A graphene / titanium dioxide composite porous material, a preparation method and an application thereof. The invention relates to porous materials. The composite material has an interpenetrated pore structure with a substrate structure size being 100 nm-5 [mu]m and a pore diameter being 100 nm-5 [mu]m. The composite material is in a three-dimension net-pore structure. A micro-scale structure of the substrate is a continuous phase composed of graphene and nano titanium dioxide is dispersed on a dispersed graphene sheet layer. The graphene / titanium dioxide composite porous material is prepared by following steps including: dissolving a styrene segmented copolymer in a selective solvent to form a polymer micelle solution; adding a graphene oxide solution; adding titanium dioxide after the graphene oxide solution and the polymer micelle solution being mixed uniformly; performing ultrasound wave treatment; performing a curtain coating process on a carrying plate which is placed in a saturated atmosphere of a precipitant to obtain a polymer / graphene oxide / titanium dioxide composite porous material after the solvent being volatilized; performing a carbonizing process in an inert atmosphere with the carrying plate to obtain a product. The composite porous material can be applied in preparation of a graphene / titanium dioxide porous composite electrode which can be used in the fields such as photocatalysis, a lithium ion battery, a super capacitor and the like.

Description

technical field [0001] The invention relates to porous materials, in particular to a graphene / titanium dioxide composite porous material and a preparation method and application thereof. technical background [0002] With the development of science and technology and society, the demand for high-performance power supply continues to increase, and the specific energy of traditional electrostatic capacitors is small, which is difficult to meet the actual requirements. In this context, supercapacitors have been widely studied in recent years due to their high charge and discharge rates, no pollution to the environment, long cycle life, and wide operating temperature range. [0003] Graphene is a carbonaceous material with a two-dimensional honeycomb lattice structure formed by a single layer of carbon atoms tightly packed. Graphene has been widely used in the preparation of ultra-high-performance electronic products due to its excellent electrical properties. Among them, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/133H01M4/131H01M4/1391H01M4/1393H01G11/32H01G11/46H01G11/86
CPCH01G11/36H01G11/46H01G11/50H01M4/366H01M4/48H01M4/583H01M10/0525Y02E60/10Y02E60/13
Inventor 熊晓鹏柯祺荣宋立卓姚舜
Owner XIAMEN UNIV
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