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Graphene/ZnAlTi hydrotalcite-like composite material, method for preparing same and application of graphene/ZnAlTi hydrotalcite-like composite material

A composite material and graphene technology, applied in the field of environmental water treatment, can solve the problems of limited wide application, limited natural time, uneconomical, etc., and achieve the effects of high catalytic efficiency, low consumption, and energy reduction

Inactive Publication Date: 2019-04-05
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hexavalent chromium is an ingestion poison / inhalation extremely poison, skin contact may cause sensitivity; and it is genotoxic, it is likely to cause hereditary gene defects; inhalation may cause cancer, and there is a persistent danger to the environment
However, the main problems of the adsorption method are poor physical and chemical stability of the adsorbent and difficult regeneration; the membrane separation method has a short service life, which limits its wide application; the electrochemical treatment method has low efficiency and is uneconomical.
[0003] At present, photocatalytic removal and degradation of pollutants mostly requires the use of ultraviolet light and visible light simulating sunlight (usually a 300W tritium lamp). The biggest challenge in using this light source is that it is limited by natural time, and the other is nighttime operation. Or cloudy operation requires high-power light source, high energy consumption

Method used

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  • Graphene/ZnAlTi hydrotalcite-like composite material, method for preparing same and application of graphene/ZnAlTi hydrotalcite-like composite material
  • Graphene/ZnAlTi hydrotalcite-like composite material, method for preparing same and application of graphene/ZnAlTi hydrotalcite-like composite material
  • Graphene/ZnAlTi hydrotalcite-like composite material, method for preparing same and application of graphene/ZnAlTi hydrotalcite-like composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040](1) Take 1.20mL TiCl 4 Mix with an equal volume of concentrated HCl (mass fraction 36-38%), and add 20mL ultrapure water (UP water) to dissolve to obtain TiCl 4 HCl solution, weigh 6 x 10 -2 mol ZnCl 2 , 5.3×10 -3 mol AlCl 3 ·6H 2 O, add ultrapure water to dissolve, then add TiCl 4 HCl solution to obtain a mixed salt solution;

[0041] (2) Take 1.5mL of graphene oxide (Graphene oxide, GO) with a concentration of 10mg / mL, add 40-50mL of ultrapure water (UP water), and crush it with an ultrasonic cell breaker for 10min, in which the horn Φ10 , get GO aqueous suspension after the end;

[0042] (3) Under ultrasonic conditions, add the GO aqueous suspension dropwise to the mixed salt solution, and then add CO(NH 2 ) 2 The solution was transferred to a 500mL round-bottomed flask, heated to reflux at 100°C for 48h, and carried out in an ultrasonic cleaner, wherein CO(NH 2 ) 2 The solution consists of 0.58mol CO(NH 2 ) 2 and dissolved in water;

[0043] (4) Step (3...

Embodiment 2

[0060] (1) Take 1.20mL TiCl 4 Mix with an equal volume of concentrated HCl (mass fraction 36-38%), and add 20mL ultrapure water (UP water) to dissolve to obtain TiCl 4 HCl solution, weigh 6 x 10 -2 mol ZnCl 2 , 5.3×10 -3 mol AlCl 3 ·6H 2 O, add ultrapure water to dissolve, then add TiCl 4 HCl solution to obtain a mixed salt solution;

[0061] (2) Take 5 mL of graphene oxide (GO) with a concentration of 10 mg / mL, add 40 to 50 mL of ultrapure water (UP water), and crush it with an ultrasonic cell breaker for 10 minutes, wherein the horn Φ10, After the end, get GO water suspension;

[0062] (3) Under ultrasonic conditions, add the GO aqueous suspension dropwise to the mixed salt solution, and then add CO(NH 2 ) 2 The solution was transferred to a 500mL round-bottomed flask, heated to reflux at 100°C for 48h, and carried out in an ultrasonic cleaner, wherein CO(NH 2 ) 2 The solution consists of 0.58mol CO(NH 2 ) 2 and dissolved in water;

[0063] (4) Step (3) The sam...

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Abstract

The invention belongs to the field of environmental water treatment, and discloses a graphene / ZnAlTi hydrotalcite-like composite material, a method for preparing the same and application of the graphene / ZnAlTi hydrotalcite-like composite material. The graphene / ZnAlTi hydrotalcite-like composite material, the method and the application have the advantages that LDHs (layered double hydroxides) are used as catalyst carriers, three types of Zn, Al and Ti elements with photocatalytic performance are loaded between layers of the catalyst carriers, the photocatalytic efficiency can be reinforced by added graphene, accordingly, semiconductor materials with photocatalytic functions can be prepared by the aid of the method and can be used for degrading Cr (VI) and antibiotics in water, and the pioneer of application of graphene-LDHs composite materials to the field of treatment of sewage in low-power LED lamp environments can be initiated.

Description

technical field [0001] The invention belongs to the field of environmental water treatment, in particular to a graphene / ZnAlTi-like hydrotalcite composite material and its preparation method and application. Background technique [0002] my country's current heavy metal pollution is still very serious, such as the pollution of hexavalent chromium and antibiotics. Hexavalent chromium is an ingestion poison / inhalation extremely poison, and skin contact may cause sensitivity; and it is genotoxic, which is likely to cause hereditary gene defects; inhalation may cause cancer, and has a persistent danger to the environment. But these are properties of hexavalent chromium, chromium metal, trivalent or tetravalent chromium are not so highly toxic. The situation of antibiotic water pollution in the Pearl River Delta region is already very serious. The concentration of antibiotics in the Pearl River Basin has seriously exceeded the standard, and the concentration of antibiotics in wa...

Claims

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Application Information

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IPC IPC(8): B01J23/06C02F1/30C02F101/38C02F101/22
CPCC02F1/30B01J23/002B01J23/06C02F2101/22C02F2101/38B01J2523/00B01J35/39B01J2523/27B01J2523/31B01J2523/47
Inventor 黄柱坚叶家而张力吴思颖谢晓敏
Owner SOUTH CHINA AGRI UNIV
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