Preparation method and application for graphene multi-metal composite material

A technology of multiple metals and composite materials, applied in the direction of graphene, nanotechnology for materials and surface science, non-metallic elements, etc., can solve the problems of high energy consumption, low reaction rate, low removal rate of COD and TOC, etc. To achieve the effect of simple process, not easy to reunite, and fast processing speed

Inactive Publication Date: 2019-07-16
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has some limitations. In practical applications, it needs to heat a large water area, which requires high energy consumption, and the reaction rate is low, and

Method used

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  • Preparation method and application for graphene multi-metal composite material
  • Preparation method and application for graphene multi-metal composite material
  • Preparation method and application for graphene multi-metal composite material

Examples

Experimental program
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Example Embodiment

[0048] Embodiment 1: A method for preparing a graphene multi-element metal composite material, the specific steps are as follows:

[0049] (1) Add graphene oxide to 200 mL of solvent (water) and perform ultrasonic dispersion treatment for 60 minutes to obtain a graphene oxide dispersion; wherein the concentration of graphene oxide in the graphene oxide dispersion is 5 g / L;

[0050] (2) Dissolve reducing agent (hydrazine hydrate), alkali (sodium hydroxide), metal salt (a mixture of divalent metal salt (magnesium nitrate) and trivalent metal salt (aluminum nitrate)) in step (1) Graphene oxide A mixed solution is obtained from the dispersion; wherein the mass ratio of the reducing agent (hydrazine hydrate) to the graphene oxide is 10:1; the molar concentration of the alkali (sodium hydroxide) in the mixed solution is 4mol / L; the divalent metal salt in the mixed solution The molar concentration of (magnesium nitrate) is 60mmol / L, and the molar concentration of trivalent metal salt (alu...

Example Embodiment

[0055] Embodiment 2: The preparation method of the graphene multi-element metal composite material of this embodiment, the specific steps are as follows:

[0056] (1) Add graphene oxide to 200 mL of solvent (water: methanol (v / v) = 1:4) and perform ultrasonic dispersion treatment for 60 minutes to obtain a graphene oxide dispersion; wherein the graphene oxide dispersion in the graphene oxide dispersion The concentration is 1g / L;

[0057] (2) Dissolve reducing agent (sodium borohydride), alkali (sodium hydroxide), metal salt (a mixture of divalent metal salt (magnesium nitrate) and trivalent metal salt (aluminum nitrate)) in step (1) graphite oxide The mixed solution is obtained from the ene dispersion; the mass ratio of sodium borohydride to graphene oxide is 0.1:1; the molar concentration of alkali (sodium hydroxide) in the mixed solution is 1mol / L; the divalent metal salt (nitric acid) in the mixed solution The molar concentration of magnesium) is 30mmol / L, and the molar concent...

Example Embodiment

[0060] Embodiment 3: The preparation method of the graphene multi-element metal composite material of this embodiment, the specific steps are as follows:

[0061] (1) Add graphene oxide to 200 mL of solvent (water: ethanol (v / v) = 1:10) and perform ultrasonic dispersion treatment for 60 min to obtain a graphene oxide dispersion; wherein the graphene oxide in the graphene oxide dispersion is The concentration is 4g / L;

[0062] (2) Dissolve reducing agent (urea), alkali (sodium hydroxide), metal salt (mixture of divalent metal salt (magnesium nitrate) and trivalent metal salt (aluminum nitrate)) in step (1) Graphene oxide dispersion The mixed solution is obtained in the liquid; the mass ratio of urea to graphene oxide is 8:1; the molar concentration of alkali (sodium hydroxide) in the mixed solution is 1 mol / L; the moles of the divalent metal salt (magnesium nitrate) in the mixed solution The concentration is 30mmol / L, and the molar concentration of trivalent metal salt (aluminum ni...

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Abstract

The invention discloses a preparation method and an application for a graphene multi-metal composite material, belonging to the technical field of graphene multi-metal composite materials. The preparation method provided by the invention comprises the following steps: adding graphene oxide into a solvent, and carrying out ultrasonic dispersion treatment for 1 to 2 h so as to obtain a graphene oxide dispersion; dissolving a reducing agent, alkali and metal salt into the graphene oxide dispersion so as to obtain a mixed solution; and subjecting the mixed solution to a high-temperature hydrothermal reaction for 12 to 24 h, carrying out cooling to a room temperature, carrying out centrifuging treatment, removing a supernatant liquid, washing a solid with deionized water, and carrying out drying so as to obtain the graphene multi-metal composite material. According to the invention, by utilization of adjustment and control of the loading concentration and the particle size of a nano-sized multi-metal compound, nano-sized catalytic sites are loaded onto the surface of graphene, so a polymetallic compound loaded by a material has the advantages of high dispersion, uniform morphology, insusceptibility to agglomeration and reinforced catalytic performance; and activation of peroxides and inhibition of generation of disinfection by-products can be simultaneously realized, and the degradation ability of a disinfectant to organic matters is greatly enhanced.

Description

technical field [0001] The invention relates to a preparation method and application of a graphene multi-element metal composite material, and belongs to the technical field of graphene multi-element metal composite materials. Background technique [0002] In our daily life, water is indispensable, and the technology of water treatment is also constantly improving. Among them, the removal of organic matter has always been a research hotspot. As an oxidizing agent, peroxide has high water solubility, easy storage, and Stability and other characteristics are more and more widely used in the field of advanced oxidation technology. [0003] Specific to the removal process of actual organic matter, taking persulfate as an example, persulfate ionizes in water to produce S 2 o 8 2- ion, S 2 o 8 2- The redox potential (relative to a standard hydrogen electrode) of about E Θ =2.01V, between common oxidizing agent H 2 o 2 (E Θ =1.77V) and O 3 (E Θ =2.07V); due to the lower...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/28C01B32/184C01B32/194B82Y30/00C02F101/30
CPCB82Y30/00C02F1/283C02F1/722C02F2101/30C01B32/184C01B32/194
Inventor 苏青青韩绍弘叶辉黄鑫郦春蓉周吉峙
Owner SHANGHAI UNIV
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