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

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

Inactive Publication Date: 2013-01-16
JIANGSU UNIV
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  • Description
  • Claims
  • Application Information

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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 wi

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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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[0024] Example 1

[0025] Disperse 20 mg of graphene oxide in 20 ml of deionized water for 3 hours to obtain a graphene oxide dispersion. Weigh 1.529 g of silver nitrate and dissolve in 20 ml of deionized water to obtain a silver nitrate solution. The silver nitrate solution is stirred under magnetic stirring. Add dropwise to the above graphene oxide dispersion. After the addition is complete, the solution is stirred slowly for 6 hours to obtain mixed solution A; then 300 mg of P25 is ultrasonically dispersed in 50ml of deionized water, and the P25 dispersion is magnetically stirred. Add dropwise to mixed solution A and continue to stir for 30 minutes to obtain mixed precursor solution B, weigh 0.426 g Na 2 HPO 4 The solid is dissolved in 20 ml of deionized water to obtain a disodium hydrogen phosphate solution, and then the prepared disodium hydrogen phosphate solution is added dropwise to the mixed precursor solution B, until the reaction system appears grayish green turbidity, ...

Example Embodiment

[0027] Example 2

[0028] Disperse 50 mg of graphene oxide in 20 ml of deionized water for 4 hours to obtain a graphene oxide dispersion. Weigh 1.529 g of silver nitrate and dissolve in 20 ml of deionized water to obtain a silver nitrate solution. The silver nitrate solution is stirred under magnetic stirring. Add dropwise to the above graphene oxide dispersion. After the addition is complete, the solution is stirred slowly for 12 hours to obtain mixed solution A, then 400 mg of P25 is ultrasonically dispersed in 50ml of deionized water, and the P25 dispersion is magnetically stirred. Add dropwise to mixed solution A and continue stirring for 30 minutes to obtain mixed precursor solution B, weigh 0.36 g NaH 2 PO 4 The solid was dissolved in 20 ml of deionized water to obtain a sodium dihydrogen phosphate solution, and then the prepared sodium dihydrogen phosphate solution was added dropwise to the mixed precursor solution B until the reaction system appeared brownish-yellow turbid...

Example Embodiment

[0029] Example 3

[0030] Disperse 100 mg of graphene oxide in 50 ml of deionized water for 5 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. The silver nitrate solution is stirred under magnetic stirring. Add dropwise to the above graphene oxide dispersion. After the addition is complete, the solution is slowly stirred for 8 hours to obtain mixed solution A, and then 600 mg of P25 is ultrasonically dispersed in 50ml of deionized water, and the P25 dispersion is magnetically stirred. Add dropwise to mixed solution A and 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 B until the reaction system appeared grayish-green t...

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Abstract

The invention discloses a graphene, silver phosphate and titanium dioxide dual-functional composite and a method for preparing the same, and belongs to fields of photocatalysis technology, biological antibiosis and water pollution control. The method includes steps of ultrasonically treating oxidized graphene in water to obtain oxidized graphene dispersion liquid; dissolving silver phosphate in deionized water, adding the deionized water with the silver phosphate into the oxidized graphene dispersion liquid under the condition of stirring, and then stirring the oxidized graphene dispersion liquid to obtain mixed solution A; ultrasonically dispersing P25 in deionized water to prepare dispersion liquid, dripping the P25 dispersion liquid into the mixed solution A under the condition of magnetic stirring, and then stirring the mixed solution A to obtain mixed precursor solution B; and dripping phosphate solution into the mixed precursor solution B, then continuing stirring the mixed precursor solution B, shifting the mixed precursor solution B into a hydrothermal reaction kettle to enable the mixed precursor solution B to react so as to obtain a product, cooling the product to the room temperature, centrifuging the product, then washing the product and performing vacuum drying for the product to obtain the composite. The prepared composite not only can quickly degrade organic pollutants with certain concentration when irradiated by visible light, but also has broad-spectrum and efficient bactericidal activity for 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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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
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