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A kind of graphene-titanium dioxide-attapulgite composite material and its preparation method and application

A technology of titanium dioxide and composite materials, applied in chemical instruments and methods, catalyst activation/preparation, separation methods, etc., can solve the problems of small specific surface area, hindering application, etc., and achieve large specific surface area, reduce composite efficiency, and high photocatalytic effect. Effect

Active Publication Date: 2019-11-05
XIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When TiO2 nanoparticles also have the disadvantage of small specific surface area, which hinders their wider application in the purification industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of preparation method of graphene-titanium dioxide-attapulgite composite material, comprises the following steps:

[0034] (1) Prepare graphene oxide suspension solution;

[0035] (11) Mix 8g of graphite powder and 210ml of concentrated sulfuric acid in an ice bath, then gradually add 230ml of potassium permanganate to it within 1 hour to obtain a mixed solution;

[0036] (12) Place the mixed solution obtained in step (11) at 30°C for constant temperature reaction for 0.5 hours, then place it on a magnetic stirrer and stir for 20 hours, then react at 90°C for 0.5 hours, filter to obtain a muddy mass, and then Add distilled water to the above-mentioned muddy mass, at 3000-4000r. min -1 Centrifuge for 10 minutes and centrifuge 2-3 times to obtain a graphene oxide suspension solution.

[0037] (2) Preparation of titanium dioxide suspension solution: Mix 18ml of concentrated hydrochloric acid, 10ml of water and 0.36g of ammonium sulfate, stir, then slowly add 4ml ...

Embodiment 2

[0043] A kind of preparation method of graphene-titanium dioxide-attapulgite composite material, comprises the following steps:

[0044] (1) Prepare graphene oxide suspension solution;

[0045] (11) Mix 12g of graphite powder and 220ml of concentrated sulfuric acid in an ice bath, then gradually add 210ml of potassium permanganate to it within 3 hours to obtain a mixed solution;

[0046] (12) Place the mixed solution obtained in step (11) at 50°C for constant temperature reaction for 2 hours, then place it on a magnetic stirrer and stir for 24 hours, then react at 70°C for 2 hours, filter to obtain a muddy mass, and then Add distilled water to the above-mentioned muddy mass, at 4000r. min -1 Centrifuge for 20 minutes and centrifuge 2-3 times to obtain a graphene oxide suspension solution.

[0047] (2) Preparation of titanium dioxide suspension solution: Mix 20ml of concentrated hydrochloric acid, 20ml of water and 0.38g of ammonium sulfate, stir, then slowly add 4.5ml of te...

Embodiment 3

[0052] A kind of preparation method of graphene-titanium dioxide-attapulgite composite material, comprises the following steps:

[0053] (1) Prepare graphene oxide suspension solution;

[0054] (11) Mix 10g of graphite powder and 230ml of concentrated sulfuric acid in an ice bath, then gradually add 220ml of potassium permanganate to it within 2 hours to obtain a mixed solution;

[0055] (12) Put the mixed solution obtained in step (11) at 40°C for constant temperature reaction for 1 hour, then place it on a magnetic stirrer and stir for 22 hours, then react at 80°C for 1 hour, filter to obtain a muddy mass, and then Add distilled water to the above-mentioned muddy mass, at 3000r. min -1 Centrifuge for 10 minutes and centrifuge 2-3 times to obtain a graphene oxide suspension solution.

[0056] (2) Preparation of titanium dioxide suspension solution: Mix 20ml of concentrated hydrochloric acid, 20ml of water and 0.38g of ammonium sulfate, stir, then slowly add 4.5ml of tetrab...

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Abstract

The invention discloses a graphene-titanium dioxide-attapulgite composite material and its preparation method and application. The method includes: preparing a graphene oxide suspension solution; preparing a titanium dioxide suspension solution; and using a hydrothermal reaction method to mix the graphene oxide suspension solution, the titanium dioxide suspension solution and the asperity to obtain a graphene-titanium dioxide-attapulgite composite material. The invention combines graphene and titanium dioxide with excellent material properties and attapulgite with large specific surface area, and combines the advantages of the three materials to prepare a product with high electronic conductivity, high recyclability, high specific surface area, and high adsorption capacity. , graphene-titanium dioxide-attapulgite composite material with high strength, high photocatalytic effect and high sterilization and purification ability; this method has low preparation cost, simple and easy operation, and is conducive to large-scale production.

Description

technical field [0001] The invention specifically relates to a graphene-titanium dioxide-attapulgite composite material and its preparation method and application. Background technique [0002] Photocatalyst is a photo-semiconductor material with photocatalytic function, and it is currently the safest and cleanest environmental purification material in the world. It has the characteristics of low energy consumption, high catalytic rate, long service life, reusable, sterilizing and purifying, and is widely used in disinfection engineering, oil pollution degradation engineering, purification engineering and other fields. The stability and reliability of photocatalyst in the application process are gradually recognized by everyone, and it is a new type of environmental purification material. With the continuous emergence of new purification industries and new purification-related products, photocatalysts have gradually become the main material for large-scale environmental pur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B01J21/18B01J35/10B01J37/10B01D53/86C02F1/28C02F1/30
CPCB01D53/86B01J20/20C02F1/288C02F1/30B01J20/28057B01J21/18B01J37/10B01J35/61B01J35/60B01J35/39Y02W10/37
Inventor 姜丽丽李友建杨邦建张勤勇闵中华
Owner XIHUA UNIV
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