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Preparation method of graphene-based photocatalytic material

A photocatalytic material and graphene-based technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problem of low separation efficiency of photogenerated carriers, difficulties in meeting requirements, and poor photocatalytic efficiency and other problems, to achieve the effect of high crystallinity, easy operation and high separation efficiency

Inactive Publication Date: 2019-07-05
TAIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing photocatalytic materials generally have low separation efficiency of photogenerated carriers, resulting in low light utilization rate and poor photocatalytic efficiency, which are difficult to meet the requirements of practical applications.

Method used

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  • Preparation method of graphene-based photocatalytic material
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  • Preparation method of graphene-based photocatalytic material

Examples

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Embodiment 1

[0029] A preparation method of a graphene-based photocatalytic material, comprising the preparation of graphene oxide, the synthesis and catalyst crystallization of titanium dioxide / molybdenum disulfide / graphene composite hydrogel, comprising the following steps:

[0030] (1) Accurately weigh 1g of graphite powder, add it to an open glass beaker filled with 70mL of concentrated sulfuric acid, heat it in an oil bath at 35°C and keep it warm for 30min, keep magnetic stirring at a stirring speed of 60r / min;

[0031] (2) In the open glass beaker in step (1), add 3.5g potassium permanganate evenly in 10 times, keep the stirring speed of 60r / min, and stir for 4h;

[0032] (3) Transfer the open glass beaker in step (2) to an ice-water bath environment, add 200mL of deionized water and stir evenly, then add 20mL of hydrogen peroxide aqueous solution every 5min, adding 150mL of hydrogen peroxide aqueous solution in total, the process Keep magnetic stirring in the middle, the stirring s...

Embodiment 2

[0042] A preparation method of a graphene-based photocatalytic material, comprising the preparation of graphene oxide, the synthesis and catalyst crystallization of titanium dioxide / molybdenum disulfide / graphene composite hydrogel, comprising the following steps:

[0043](1) Accurately weigh 1g of graphite powder, add it to an open glass beaker filled with 50mL of concentrated sulfuric acid, heat it in an oil bath at 30°C and keep it warm for 30min, keep magnetic stirring, and the stirring speed is 60r / min;

[0044] (2) In the open glass beaker in step (1), add 3g potassium permanganate evenly in 5 times, keep the stirring speed of 60r / min, stir for 3h;

[0045] (3) Transfer the open glass beaker in step (2) to an ice-water bath environment, add 200mL of deionized water and stir evenly, then add 20mL of hydrogen peroxide aqueous solution every 3min, and add 120mL of hydrogen peroxide aqueous solution in total. Keep magnetic stirring in the middle, the stirring speed is 180r / mi...

Embodiment 3

[0055] A preparation method of a graphene-based photocatalytic material, comprising the preparation of graphene oxide, the synthesis and catalyst crystallization of titanium dioxide / molybdenum disulfide / graphene composite hydrogel, comprising the following steps:

[0056] (1) Accurately weigh 1g of graphite powder, add it to an open glass beaker filled with 100mL of concentrated sulfuric acid, heat it in an oil bath at 40°C and keep it warm for 30min, keep magnetic stirring, and the stirring speed is 120r / min;

[0057] (2) Add 5g potassium permanganate evenly in the open glass beaker in step (1) 10 times, keep the stirring speed of 120r / min, and stir for 5h;

[0058] (3) Transfer the open glass beaker in step (2) to an ice-water bath environment, add 200mL of deionized water and stir evenly, then add 20mL of hydrogen peroxide aqueous solution every 5min, and add 200mL of hydrogen peroxide aqueous solution in total. Keep magnetic stirring in the middle, the stirring speed is 30...

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Abstract

The invention discloses a preparation method of a graphene-based photocatalytic material, which comprises the steps of preparing graphene oxide, synthesizing titanium dioxide / molybdenum disulfide / graphene composite hydrogel and crystallization of a catalyst; the raw materials comprise graphite powder, concentrated sulfuric acid, potassium permanganate, aqueous hydrogen peroxide solution, hydrochloric acid, anhydrous ethanol, deionized water, sodium molybdate, L-cysteine, titanium sulfate and glucose. The graphene-based photocatalyst prepared by the method has the advantages of uniform pore size, high crystallinity, large specific surface area, high separation efficiency of photogenerated carriers, and the preparation method is safe, simple and easy to operate.

Description

technical field [0001] The invention relates to the technical field of graphene, in particular to a method for preparing a graphene-based photocatalytic material. Background technique [0002] Graphene is a new type of two-dimensional nanomaterial. Since its discovery, people have discovered more and more excellent properties of graphene, such as high strength, high conductivity, high sensing sensitivity and so on. [0003] Photocatalytic technology is a technical field that has been vigorously developed in recent years. Through photocatalytic technology, solar energy can be directly solidified into chemical energy, thus providing a new way to solve energy and environmental problems. [0004] The existing photocatalytic materials generally have low separation efficiency of photogenerated carriers, resulting in low light utilization rate and poor photocatalytic efficiency, which are difficult to meet the requirements of practical applications. Contents of the invention [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051B01J35/10
CPCB01J27/051B01J35/39B01J35/23B01J35/647
Inventor 肖圣威
Owner TAIZHOU UNIV
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