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Preparation method and application of magnetic aminated graphene oxide

A technology of amination and graphene, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve problems such as the influence of the adsorption process, achieve high adsorption efficiency, simple preparation process, and extensive sources Effect

Inactive Publication Date: 2014-09-17
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, environmental conditions such as the amount of adsorption material, adsorption time, wastewater composition, temperature, pH value, and the background electrolyte in wastewater have a greater impact on the adsorption process.

Method used

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  • Preparation method and application of magnetic aminated graphene oxide
  • Preparation method and application of magnetic aminated graphene oxide
  • Preparation method and application of magnetic aminated graphene oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of magnetic aminated graphene oxide of the present invention:

[0022] 6g graphite powder, 5g K 2 S 2 o 8 and 5g P 2 o 5 Add it to 24mL of concentrated sulfuric acid with a mass concentration of 98%, react at 80°C for 4.5 hours, add 1000mL of ultrapure water after cooling to room temperature, wash the obtained product to neutrality after standing for 12 hours, and then dry it at 60°C to obtain Pre-oxidized graphene; the obtained pre-oxidized graphite is added to 240mL mass concentration of 98% concentrated sulfuric acid, then add 5g NaNO 3 and 30g KMnO 4 , react at 0°C for 4 hours, heat up to 35°C for 2 hours, add 500mL of ultrapure water, react at 98°C for 1 hour, then add 1000mL of ultrapure water and 40mL of concentrated H at room temperature 2 o 2 , continue the reaction for 2 hours, wash the obtained product with a HCl solution with a mass concentration of 10%, wash with a large amount of water until neutral, add water to volume, and ult...

Embodiment 2

[0027] The magnetic aminated graphene oxide of the present invention is used to remove heavy metal ions in water, comprising the following steps:

[0028] Take nine volumes of 50mL and an initial concentration of 10mg / L copper wastewater samples to be treated, adjust the pH value with nitric acid or sodium hydroxide in the range of 2 to 11, add the magnetic aminated graphene oxide prepared in Example 1 To the wastewater sample, the amount added per liter of wastewater is 96 mg based on the weight of magnetic aminated graphene oxide. The reactor is placed in a constant temperature water bath shaking box with a rotation speed of 150 rpm, and the temperature is kept at 30 ° C. After shaking for 24 hours, the The magnetic aminated graphene oxide is separated from the solution to complete the treatment of divalent copper wastewater. The concentration of the remaining divalent copper ions in the solution is measured by flame atomic absorption spectrophotometry, and the calculated ad...

Embodiment 3

[0031] The magnetic aminated graphene oxide of the present invention is used to remove heavy metal ions in water, comprising the following steps:

[0032] Take nine volumes of 50 mL and an initial concentration of 10 mg / L copper wastewater samples to be treated, then add a background electrolyte NaCl with a molar concentration of 0.01 mol / L, adjust the pH value with nitric acid or sodium hydroxide within the range of 2 to 11, The magnetic aminated graphene oxide prepared in Example 1 is added to the waste water sample, the amount added per liter of waste water is 96 mg based on the weight of the magnetic aminated graphene oxide, and the reactor is placed in a constant temperature water bath with a rotation speed of 150 rpm to vibrate In the box, the temperature is kept at 30°C, and the magnetic aminated graphene oxide is separated from the solution after oscillating for 24 hours to complete the treatment of divalent copper wastewater. The concentration of the remaining divalen...

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Abstract

The invention relates to a preparation method and application of magnetic aminated graphene oxide. The preparation method comprises the steps of firstly loading ferrite nanoparticles on a graphene oxide nanosheet so as to prepare magnetic graphene oxide, and grafting diethylenetriamine to the surface of the magnetic graphene oxide so as to prepare the magnetic aminated graphene oxide, wherein the prepared magnetic aminated graphene oxide is easily applied to solid-liquid separation and is easy to recycle. According to the magnetic aminated graphene oxide prepared by virtue of the preparation method, bivalent copper ions in water can be effectively removed, the adsorption property of the magnetic aminated graphene oxide is influenced by the pH value of a solution and back-ground electrolyte. The magnetic aminated graphene oxide can be applied to the treatment of copper-containing wastewater discharged by electroplate factories, smelting plants, electronic equipment factories and the like.

Description

technical field [0001] The invention belongs to the field of environmental functional materials and water treatment new technologies, and specifically relates to a preparation method and application of magnetic aminated graphene oxide. Background technique [0002] At present, my country's heavy metal pollution is relatively serious, and the heavily polluted provinces have affected the safety of agricultural products and drinking water. In particularly serious areas, basic farmland has been converted into urban construction land. How to deal with heavy metal wastewater has become a hot and difficult point in the field of environmental science and engineering research, and it is also the key to solving heavy metal pollution in our country. Compared with other methods, the adsorption method has the advantages of simple operation, short processing time, low cost, and good effect, but different adsorption materials have a great influence on the adsorption effect. Developing che...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F1/62
Inventor 胡新将刘云国曾光明王慧郭一明李婷婷周璐谭小飞江卢华郭方颖
Owner HUNAN UNIV
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