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Graphene, silver phosphate and titanium dioxide dual-functional composite and method for preparing same

A composite material, titanium dioxide technology, applied in chemical instruments and methods, botanical equipment and methods, water/sludge/sewage treatment, etc., to achieve the effect of uniform size, controllable structure, and preventing large-scale agglomeration

Inactive Publication Date: 2014-08-20
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the composite photocatalyst prepared by the composite of graphene and titanium dioxide has shown excellent performance, it has received extensive attention from researchers. In order to further improve the graphene-based composite The photocatalytic performance of the material, and give full play to other performances, we can combine the characteristics of related materials, use the synergistic effect between the preparation technology of nanocomposites and different material functions, and prepare dual composites with excellent photocatalytic performance and efficient antibacterial and bactericidal activity. Functional composite materials. At present, graphene oxide with large specific surface area and good solubility and dispersion is used as the precursor, silver nitrate, phosphate and P25 are used as raw materials, and graphene / silver phosphate / titanium dioxide bifunctional composite materials are prepared in situ by hydrothermal method. And it has not been reported in the fields of photocatalytic degradation and antibacterial sterilization

Method used

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  • Graphene, silver phosphate and titanium dioxide dual-functional composite and method for preparing same
  • Graphene, silver phosphate and titanium dioxide dual-functional composite and method for preparing same
  • Graphene, silver phosphate and titanium dioxide dual-functional composite and method for preparing same

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Experimental program
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Effect test

Embodiment 1

[0025] Disperse 20 mg of graphene oxide in 20 ml of deionized water and sonicate for 3 hours to obtain a graphene oxide dispersion, weigh 1.529 g of silver nitrate and dissolve it in 20 ml of deionized water to obtain a silver nitrate solution, and dissolve the silver nitrate solution under magnetic stirring conditions Add it dropwise to the above-mentioned graphene oxide dispersion, and stir the solution slowly for 6 hours after the addition is complete, to obtain a mixed solution A; then weigh 300 mg P25 and ultrasonically disperse it in 50ml deionized water, and dissolve the P25 dispersion under magnetic stirring conditions After being added dropwise in mixed solution A, continue to stir for 30 minutes to obtain mixed precursor solution B, weigh 0.426 g Na 2 HPO 4 Dissolve the solid in 20 ml of deionized water to obtain a disodium hydrogen phosphate solution, then add the prepared disodium hydrogen phosphate solution to the mixed precursor solution B dropwise until the reac...

Embodiment 2

[0028] Disperse 50 mg graphene oxide in 20 ml deionized water and sonicate for 4 hours to obtain a graphene oxide dispersion, weigh 1.529 g silver nitrate and dissolve it in 20 ml deionized water to obtain a silver nitrate solution, and dissolve the silver nitrate solution under magnetic stirring conditions Add dropwise to the above-mentioned graphene oxide dispersion. After the dropwise addition, the solution was slowly stirred for 12 hours to obtain a mixed solution A. Then, 400 mg of P25 was ultrasonically dispersed in 50 ml of deionized water, and the P25 dispersion was mixed under magnetic stirring conditions. After being added dropwise in mixed solution A, continue to stir for 30 minutes to obtain mixed precursor solution B, weigh 0.36 g NaH 2 PO 4Dissolve the solid in 20 ml of deionized water to obtain a sodium dihydrogen phosphate solution, and then add the prepared sodium dihydrogen phosphate solution to the mixed precursor solution B drop by drop until the reaction s...

Embodiment 3

[0030] Disperse 100 mg of graphene oxide in 50 ml of deionized water and ultrasonically obtain a graphene oxide dispersion for 5 hours, weigh 1.529 g of silver nitrate and dissolve it in 20 ml of deionized water to obtain a silver nitrate solution, and dissolve the silver nitrate solution under magnetic stirring conditions Add dropwise to the above-mentioned graphene oxide dispersion, after the dropwise addition, the solution was slowly stirred for 8 hours to obtain a mixed solution A, then weigh 600 mg P25 and ultrasonically disperse it in 50ml deionized water, and dissolve the P25 dispersion under magnetic stirring conditions After being added dropwise in mixed solution A, continue to stir for 30 minutes to obtain mixed precursor solution B, weigh 0.426 g Na 2 HPO 4 The solid was dissolved in 20 ml of deionized water to obtain a disodium hydrogen phosphate solution, and then the prepared disodium hydrogen phosphate solution was added dropwise to the mixed precursor solution ...

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Abstract

The invention discloses a graphene / silver phosphate / titanium dioxide bifunctional composite material and a preparation method thereof, belonging to the fields of photocatalytic technology, biological antibacterial and water pollution control. The steps are as follows: ultrasonically treat graphene oxide in water to obtain a graphene oxide dispersion; dissolve silver nitrate in deionized water, add it to the graphene oxide dispersion under stirring, and stir to obtain a mixed solution A; P25 ultrasonically disperses After making a dispersion in deionized water, add the P25 dispersion dropwise to the mixed solution A under magnetic stirring conditions, and stir to obtain the mixed precursor solution B; add the phosphate solution dropwise to the mixed precursor solution B and continue stirring , transferred to a hydrothermal reaction kettle for reaction, cooled to room temperature, and the product was centrifuged, washed and vacuum-dried to obtain the composite material. The composite material prepared by the invention not only can rapidly degrade a certain concentration of organic pollutants under the irradiation of visible light, but also has broad-spectrum and high-efficiency bactericidal activity against various bacteria.

Description

technical field [0001] The invention relates to a graphene / silver phosphate / titanium dioxide bifunctional composite material and a preparation method thereof, in particular to a method for preparing a graphene / silver phosphate / titanium dioxide composite material by a hydrothermal method, which belongs to composite materials, photocatalytic technology, The field of biological antibacterial and water pollution control. Background technique [0002] With the acceleration of industrialization, the problem of water resources is becoming more and more serious. Water pollution has seriously affected people's quality of life, and has also had a greater impact on the implementation of my country's sustainable development strategy. In recent years, the use of photocatalytic technology to eliminate and degrade Pollutants are one of the most active research fields in current water environment governance. More and more photocatalytic materials are used in environmental protection, water ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/18A01N59/26A01P1/00C02F1/50C02F1/30C02F101/30
Inventor 杨小飞崔海英李扬刘恒秦洁玲张蓉仙高庆侠
Owner JIANGSU UNIV