Photocatalytic material and preparation method and fabric thereof

A technology of photocatalytic materials and fabrics, applied in chemical instruments and methods, separation methods, chemical/physical processes, etc., to achieve excellent electron transfer performance, uniform dispersion, and good stability

Inactive Publication Date: 2019-01-01
宁波米瑞科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Based on this, it is necessary to provide a photocatalytic material and its preparation method and fabric for the photocatalytic effect of titanium dioxide; through this preparation method, a composite photocatalytic material of graphene and titanium dioxide nanoparticles can be obtained, thereby effectively improving the performance of titanium dioxide nanoparticles. The photocatalytic effect, and then when the photocatalytic material is applied to fabrics, it can efficiently degrade the polluting gases in the environment

Method used

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  • Photocatalytic material and preparation method and fabric thereof
  • Photocatalytic material and preparation method and fabric thereof
  • Photocatalytic material and preparation method and fabric thereof

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preparation example Construction

[0028] The preparation method of photocatalytic material provided by the invention comprises the following steps:

[0029] S1, providing graphene oxide solution;

[0030] S2, performing thermal reduction treatment on the graphene oxide solution to obtain a graphene solution, the concentration of graphene in the graphene solution is 10mg / mL-20mg / mL, and the oxygen content of graphene is 5w%-10w %;

[0031] S3, adding hydrated titanium dioxide to the graphene solution, and performing homogeneous treatment to obtain a mixed solution;

[0032] S4, using a spray dryer to spray-dry the mixed solution to obtain a photocatalytic material, the photocatalytic material is composed of graphene and titanium dioxide nanoparticles, and there is a gap between the graphene and the titanium dioxide nanoparticles .

[0033] In step S1, the graphene oxide solution is prepared by the Hummers method. The preparation process of the Hummers method is relatively time-sensitive and relatively safe ...

Embodiment 1

[0057] The graphene oxide solution was prepared by the Hummers method, and then the graphene oxide solution was subjected to thermal reduction treatment at 300° C. to obtain the graphene solution. Wherein, the graphene concentration in the graphene solution is 10mg / mL, and the oxygen content of the graphene is 5w%.

[0058] The conditions for setting homogeneous treatment are: pressure 120MPa, flow rate 50mL / min. Add hydrated titanium dioxide to the graphene solution, the mass ratio of graphene and hydrated titanium dioxide is 1:3, and perform homogenization treatment to obtain a uniformly dispersed mixed solution.

[0059] Set the air inlet temperature of the spray dryer to 170°C, the air outlet temperature to 100°C, and the spray drying speed to 5mL / min. The mixed solution is spray-dried by a spray dryer to obtain a photocatalytic material. The obtained photocatalytic material is composited by graphene and titanium dioxide nanoparticles, gaps exist between the graphene and...

Embodiment 2

[0061] The graphene oxide solution was prepared by the Hummers method, and then the graphene oxide solution was subjected to thermal reduction treatment at 320° C. to obtain the graphene solution. Wherein, the graphene concentration in the graphene solution is 13mg / mL, and the oxygen content of the graphene is 7w%.

[0062] The conditions for setting homogeneous treatment are: pressure 130MPa, flow rate 65mL / min. Add hydrated titanium dioxide to the graphene solution, the mass ratio of graphene and hydrated titanium dioxide is 1:1, and perform homogenization treatment to obtain a uniformly dispersed mixed solution.

[0063] Set the air inlet temperature of the spray dryer to 175°C, the air outlet temperature to 100°C, and the spray drying speed to 6mL / min. The mixed solution is spray-dried by a spray dryer to obtain a photocatalytic material. The obtained photocatalytic material is composited by graphene and titanium dioxide nanoparticles, gaps exist between the graphene and...

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Abstract

The invention relates to a photocatalytic material and a preparation method and a fabric thereof. The preparation method for the photocatalytic material comprises the following steps: a graphene oxidesolution is provided; thermal reduction treatment is carried out for the graphene oxide solution, so that a graphene solution is obtained, the concentration of graphene in the graphene solution is 10mg/mL to 20mg/mL, and the oxygen content of the graphene is 5 to 10 percentage by weight; the graphene solution is added with hydrated titanium dioxide and is subjected to homogenization treatment, sothat mixed liquid is obtained; and a spray dryer is adopted to carry out spray-drying for the mixed liquid, so that the photocatalytic material is obtained. The graphene and the titanium dioxide nanoparticles are combined to form the photocatalytic material, and voids exist between the graphene and the titanium dioxide nanoparticles. Because the photocatalytic material which is formed by combining the graphene and the titanium dioxide nanoparticles can be obtained by the preparation method, the photocatalytic effect of the titanium dioxide nanoparticles can be effectively improved, and thereby the photocatalytic material can effectively degrade polluting gas in the environment when being applied to fabrics.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to photocatalytic materials, their preparation methods and fabrics. Background technique [0002] There are many photocatalytic materials in the world, including semiconductors of various oxides and sulfides such as titanium dioxide, zinc oxide, tin oxide, zirconium dioxide, and cadmium sulfide. Among them, titanium dioxide has become the most popular nano-photocatalyst material in the world because of its strong oxidation ability, stable and non-toxic chemical properties, and is widely used in sewage treatment, gas purification and other industries. However, the band gap of titanium dioxide is relatively large, and only by absorbing photons with higher energy can the electrons in the valence band migrate to the conduction band, so the electrons will be excited under ultraviolet light. In addition, the photogenerated electrons and holes of titanium dioxide are very easy to recombine, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01D53/86B01D53/72A61L9/00D06M11/74D06M11/46D06M101/06
CPCA61L9/00B01D53/8668B01D2255/20707B01D2255/702B01J21/18B01J35/004D06M11/46D06M11/74D06M16/00D06M2101/06
Inventor 欧阳申珅刘明
Owner 宁波米瑞科技有限公司
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