Preparation method and application of electrostatic self-assembly of graphene/titanium dioxide material

An electrostatic self-assembly, titanium dioxide technology, applied in chemical instruments and methods, separation methods, physical/chemical process catalysts, etc., can solve the problems of hydrazine hydrate safety, unfavorable large-scale production, complex production processes, etc. Easy to prepare on a large scale, reducing the effect of agglomeration

Inactive Publication Date: 2020-05-19
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The production process of this patent is complicated, energy consumption is high, and there are serious safety problems in the use of hydrazine hydrate, which is not conducive to large-scale production

Method used

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  • Preparation method and application of electrostatic self-assembly of graphene/titanium dioxide material
  • Preparation method and application of electrostatic self-assembly of graphene/titanium dioxide material
  • Preparation method and application of electrostatic self-assembly of graphene/titanium dioxide material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: prepare graphene / titanium dioxide material, the steps are as follows:

[0034] (1) Add graphene (PDR) with a mass fraction of 0.1% in 100ml deionized water, sonicate for 10 minutes and then stir for 10 minutes, and repeat the process twice before sonicating and then stirring, and finally centrifuge to remove excess dodecylbenzene Sodium sulfonate (SDBS), redisperse the product in 100ml deionized water to obtain a graphene (PDR) dispersion;

[0035] (2) Disperse 2g of titanium dioxide (P25) powder in 50ml of deionized water, add 0.5ml of acetic acid, sonicate for 4 minutes and then stir for 10 minutes. Obtain titanium dioxide (P25) powder;

[0036](3) Add 1 g of titanium dioxide (P25) powder prepared in step (2) to 20 mg of graphene (PDR) dispersion prepared in step (1), stir for 3 hours, centrifuge and freeze-dry to obtain graphene / titanium dioxide in powder form composite materials;

[0037] (4) Take 150 mg of the composite material prepared in step (3...

Embodiment 2

[0039] Embodiment 2: prepare graphene / titanium dioxide material, the steps are as follows:

[0040] (1) Add graphene (PDR) with a mass fraction of 0.1% in 100ml deionized water, stir mechanically to disperse the graphene (PDR) in the water, then add sodium dodecylbenzenesulfonate (SDBS) with a concentration of 20CMC, Sonicate for 10 minutes and then stir for 10 minutes, and repeat the process of ultrasonication and stirring twice, and finally remove excess sodium dodecylbenzenesulfonate (SDBS) by centrifugation, and redisperse the product in 100ml deionized water to obtain graphite olefin (PDR) dispersion;

[0041] (2) Take 2g of titanium dioxide (P25) powder and disperse it in 50ml of deionized water, add 0.5ml of acetic acid, ultrasonicate for 4 minutes and then stir for 10 minutes, and repeat the process twice, after drying in an oven at 60°C to obtain Titanium dioxide (P25) powder;

[0042] (3) Add 1 g of titanium dioxide (P25) powder prepared in step (2) to 20 mg of gra...

Embodiment 3

[0045] Embodiment 3: prepare graphene / titanium dioxide material, the steps are as follows:

[0046] (1) Add graphene (PDR) with a mass fraction of 0.1% in 100ml deionized water, stir mechanically to disperse graphene (PDR) in the water, then add sodium dodecylbenzenesulfonate (SDBS) with a concentration of 40CMC, Sonicate for 10 minutes and then stir for 10 minutes, and repeat the process of ultrasonication and stirring twice, and finally remove excess sodium dodecylbenzenesulfonate (SDBS) by centrifugation, and redisperse the product in 100ml deionized water to obtain graphite olefin (PDR) dispersion;

[0047] (2) Take 2g of titanium dioxide (P25) powder and disperse it in 50ml of deionized water, add 0.5ml of acetic acid, ultrasonicate for 4 minutes and then stir for 10 minutes, and repeat the process twice, after drying in an oven at 60°C to obtain Titanium dioxide (P25) powder;

[0048] (3) Add 1 g of titanium dioxide (P25) powder prepared in step (2) to 20 mg of graphen...

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Abstract

The invention discloses an electrostatic self-assembly preparation method and application of a graphene / titanium dioxide material, belonging to the fields of photocatalysis and air purification. The preparation method of the graphene / titanium dioxide material comprises the following steps: 1) chemical modification of graphene: adding modifier 1 to the graphene dispersion; 2) chemical modification of titanium dioxide: adding modifier 2 to the titanium dioxide dispersion; 3 ) Add the modified titanium dioxide dispersion in step 2 to the modified graphene dispersion in step 1 after drying, and mechanically stir at room temperature for 3-5 hours; 4) Dry the mixed solution prepared in step 3. The beneficial effects of the present invention are: the graphene / titanium dioxide material prepared by the present invention has excellent photocatalytic degradation performance to formaldehyde, and the preparation method is simple to operate, consumes less energy, and is easy to prepare graphene / titania material on a large scale. The commercial application of titanium dioxide materials provides a possibility.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis and air purification, and in particular relates to an electrostatic self-assembly preparation method and application of graphene / titanium dioxide materials. Background technique [0002] With the development of society, people's requirements for the quality of living environment are also increasing. How to effectively remove harmful gases in the air, especially formaldehyde, has become a research hotspot. At present, the commonly used formaldehyde removal method is to use porous carbon materials such as activated carbon for adsorption. This method has the disadvantages that formaldehyde cannot be completely removed, it will be inactivated after being placed until the adsorption is saturated, and the high concentration of formaldehyde on the surface of the activated carbon material will cause desorption and release of formaldehyde. Secondary pollution etc. [0003] The emergence of photocat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/18B01D53/86B01D53/72
CPCB01D53/8668B01D2255/802B01D2257/708B01J21/18B01J35/004
Inventor 陈金伟张进王瑞林王刚
Owner SICHUAN UNIV
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