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Preparation method of photocatalyst material based on graphene

A photocatalyst and graphene technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of reducing material quantum efficiency and unsatisfactory photocatalytic effect, so as to reduce defects and increase Effects of light absorption efficiency and apparent photocatalytic performance

Inactive Publication Date: 2017-08-08
孝感双华应用科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is well known that the photogenerated carriers generated by nanophotocatalysts such as lanthanum titanate after ultraviolet light excitation are prone to hole-electron pair recombination during the transport process, which significantly reduces the quantum efficiency of the material, resulting in unsatisfactory photocatalytic effect

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  • Preparation method of photocatalyst material based on graphene
  • Preparation method of photocatalyst material based on graphene
  • Preparation method of photocatalyst material based on graphene

Examples

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Effect test

Embodiment 1

[0029] A kind of preparation method of photocatalyst material based on graphene, its preparation steps are as follows:

[0030] Step 1, adding lanthanum chloride to absolute ethanol, then adding a titanium source, and continuing to stir until a sol is formed;

[0031] Step 2, put the sol in the reactor for aeration reaction for 2 hours, then carry out sealing and heating cycle aeration reaction for 10 hours, filter and wash after natural cooling, and obtain mixed sediment;

[0032] Step 3, put the mixed precipitate in step 2 into absolute ethanol, add dispersant and graphene powder in sequence, and ultrasonically react for 2 hours to obtain a dispersion precursor;

[0033] Step 4, put the dispersed precursor liquid into the light reactor to react for 2 hours, and filter after the reaction to obtain the photocatalytic material.

[0034] The preparation formula of described photocatalyst material is as follows:

[0035] 10 parts of lanthanum chloride, 11 parts of titanium sour...

Embodiment 2

[0048] A kind of preparation method of photocatalyst material based on graphene, its preparation steps are as follows:

[0049] Step 1, adding lanthanum chloride to absolute ethanol, then adding a titanium source, and continuing to stir until a sol is formed;

[0050] Step 2, put the sol in the reactor for aeration reaction for 5 hours, then carry out sealing and heating cycle aeration reaction for 15 hours, filter and wash after natural cooling, and obtain mixed sediment;

[0051] Step 3, put the mixed precipitate in step 2 into absolute ethanol, add dispersant and graphene powder in sequence, and ultrasonically react for 4 hours to obtain a dispersion precursor;

[0052] Step 4, put the dispersed precursor liquid into the light reactor to react for 5 hours, and filter after the reaction to obtain the photocatalytic material.

[0053] The preparation formula of described photocatalyst material is as follows:

[0054] 15 parts of lanthanum chloride, 18 parts of titanium sour...

Embodiment 3

[0064] A kind of preparation method of photocatalyst material based on graphene, its preparation steps are as follows:

[0065] Step 1, adding lanthanum chloride to absolute ethanol, then adding a titanium source, and continuing to stir until a sol is formed;

[0066] Step 2, put the sol in the reactor for aeration reaction for 4 hours, then carry out sealing and heating cycle aeration reaction for 13 hours, filter and wash after natural cooling, and obtain mixed sediment;

[0067] Step 3, put the mixed precipitate in step 2 into absolute ethanol, add dispersant and graphene powder in sequence, and ultrasonically react for 3 hours to obtain a dispersion precursor;

[0068] Step 4, put the dispersed precursor liquid into the light reactor to react for 3 hours, and filter after the reaction to obtain the photocatalytic material.

[0069] The preparation formula of described photocatalyst material is as follows:

[0070] 13 parts of lanthanum chloride, 16 parts of titanium sour...

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Abstract

The invention relates to a preparation method of a photocatalyst material based on graphene. The preparation method comprises the following steps: taking lanthanum chloride, a titanium source and the graphene as raw materials; carrying out precipitation aeration reaction and rice flour heating and aeration reaction to obtain a lanthanum titanate material; carrying out ultrasonic and illumination reaction on the lanthanum titanate material and the graphene to obtain a graphene-lanthanum titanate material. According to the preparation method provided by the invention, the graphene is further reduced by utilizing an in-situ photocatalytic reduction capability of a La2Ti2O7 nano material and defects of the graphene material are reduced; meanwhile, a direction relation between the graphene and the La2Ti2O7 nano material is increased and the light absorption efficiency of the La2Ti2O7 nano material is improved.

Description

technical field [0001] The invention belongs to the technical field of photocatalysts, and relates to a preparation method of a graphene-based photocatalyst material. Background technique [0002] Since its discovery in 2004, graphene has become a dazzling new star in the nanometer world, which has attracted great attention of scientific researchers. Graphene is sp 2 The carbonaceous material with a single-layer two-dimensional honeycomb lattice structure formed by hybridized carbon atoms is the basic unit of other graphite materials. Its morphology is a sheet structure similar to thin paper, and the thickness of a single layer is only 0.335. nm, is the thinnest two-dimensional material found in the world so far. Graphene has excellent comprehensive properties: its theoretical strength is 125GPa, which is 100 times stronger than steel; its elastic modulus can reach 1.0TPa, which is comparable to that of carbon nanotubes; its thermal conductivity is 5300W / (m•K), which is be...

Claims

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Application Information

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IPC IPC(8): B01J23/10B01J21/06B01J21/18B01J37/34
CPCB01J21/063B01J21/18B01J23/10B01J37/34B01J37/343B01J35/39
Inventor 祝艳华
Owner 孝感双华应用科技开发有限公司
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