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A preparation method of titanium dioxide sheet/graphene composite film with {001} crystal plane

A graphene composite and titanium dioxide technology, which is applied in chemical instruments and methods, chemical/physical processes, light water/sewage treatment, etc., can solve problems that have not been reported, improve the transmission path, solve the problem of unrecyclable, and simple operation Effect

Inactive Publication Date: 2020-09-29
XINJIANG UYGUR AUTONOMOUS REGION PROD QUALITY SUPERVISION & INSPECTION RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes a method for preparing a lamellar titanium dioxide / graphene composite film with {001} crystal planes, which can overcome the existing problems. At present, domestic and foreign publications and patents have not yet been reported.

Method used

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  • A preparation method of titanium dioxide sheet/graphene composite film with {001} crystal plane
  • A preparation method of titanium dioxide sheet/graphene composite film with {001} crystal plane
  • A preparation method of titanium dioxide sheet/graphene composite film with {001} crystal plane

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Effect test

Embodiment 1

[0020] a. Add 1mg of graphite oxide to 10mL of deionized water, sonicate for 0.5h to ensure that the graphite oxide is evenly dispersed, and then vacuum filter to obtain a graphite oxide film;

[0021] b. Add 0.1g of titanium tetrafluoride as a titanium source to 60mL of tetraethylene glycol solution, stir evenly at room temperature, add 0.1mL of glacial acetic acid, and react to obtain a clear solution without insoluble matter;

[0022] c. Then immerse the graphite oxide film obtained in step a into the clear solution obtained in step b, and then put it into the reaction kettle at a temperature of 80°C and keep it for 8h. After the reaction is completed, wash it alternately with deionized water and ethanol. Dry at a temperature of 60°C to obtain a titanium dioxide sheet / graphene composite thin film material with a {001} crystal plane.

Embodiment 2

[0024] a. Add 5 mg of graphite oxide to 10 mL of deionized water, ultrasonicate for 2 hours to ensure uniform dispersion of graphite oxide, and then vacuum filter to obtain graphite oxide film;

[0025] b. Add 0.5g of ammonium fluotitanate to 60mL of diethylene glycol solution, stir evenly at room temperature, add 0.5mL of glacial acetic acid, and react to obtain a clear solution without insoluble matter;

[0026] c. Then immerse the graphite oxide film obtained in step a into the clear solution obtained in step b, and then put it into the reaction kettle at a temperature of 120°C and keep it for 8h. After the reaction is completed, wash it alternately with deionized water and ethanol, Dry at a temperature of 60°C to obtain a titanium dioxide sheet / graphene composite thin film material with a {001} crystal plane.

Embodiment 3

[0028] a. Add 10 mg of graphite oxide to 10 mL of deionized water, ultrasonicate for 4 hours to ensure uniform dispersion of graphite oxide, and then vacuum filter to obtain graphite oxide film;

[0029] b. Add 1g of titanium tetrafluoride as a titanium source to 60mL of triethylene glycol solution, stir evenly at room temperature, add 3mL of glacial acetic acid, and react to obtain a clear solution without insoluble matter;

[0030] c. Then immerse the graphite oxide film obtained in step a into the clear solution obtained in step b, and then put it into the reaction kettle at a temperature of 160°C and keep it for 10h. After the reaction is completed, wash it alternately with deionized water and ethanol, Dry at a temperature of 60°C to obtain a titanium dioxide sheet / graphene composite thin film material with a {001} crystal plane.

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Abstract

The invention relates to a preparation method of a titanium dioxide sheet / graphene composite film with a {001} crystal face. According to the preparation method, a solvothermal process is used to enable a titanium dioxide sheet with the {001} crystal face to grow on the surface of a graphene film in situ. The immobilization of graphene can effectively improve the transmission path of a photocarrier, so that excited electrons generated by TiO2 in a photocatalytic reaction can be easily transferred to the graphene film for derivation, and thus enhancing of the transfer efficiency of the photoexcited electrons is facilitated. In addition, the film material also solves the disadvantages that a powder material is unstable, easy to agglomerate and difficult to reuse. The preparation process hasthe advantages of high operability, easy industrialization, etc. In the field of sewage treatment, the prepared composite film has certain application value and market prospects. Moreover, since TiO2itself has a wide range of applications, the composite film can also be applied to other fields such as solar cells, air purification, antibiosis, self-cleaning, and the like.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic material preparation, and in particular relates to a preparation method of a titanium dioxide sheet / graphene composite film with a {001} crystal plane. Background technique [0002] Semiconductor photocatalysis technology is a green and efficient method for removing organic pollutants in water bodies. The development of semiconductor photocatalytic materials with excellent performance has always been a hot spot in the research of photocatalytic technology. [90,91] . Among many semiconductor materials, TiO 2 It has the advantages of non-toxicity, low cost, and good stability, and has been widely concerned by the majority of scientific research workers. Generally, anatase TiO 2 The photocatalytic performance of the photocatalyst is often restricted by its crystal morphology, more precisely, the exposure rate of highly active crystal planes and its atomic arrangement. For example, anatase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J35/00B01J35/06C02F1/32C02F101/30
CPCB01J21/063B01J35/004B01J35/065C02F1/32C02F2101/308
Inventor 陈琳杨苏东马研
Owner XINJIANG UYGUR AUTONOMOUS REGION PROD QUALITY SUPERVISION & INSPECTION RES INST
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