fe 1.833 (oh) 0.5 o 2.5 Nitrogen-doped graphene nanocomposite material and preparation method thereof

A technology of nanocomposite materials and nitrogen-doped graphene, which is applied in the direction of nanotechnology, nanotechnology, material electrochemical variables, etc., can solve the problems of cumbersome operation, large waste, and complexity, and achieve the effect of simple process and easy control

Active Publication Date: 2019-07-16
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The present invention provides a kind of Fe 1.833 (OH) 0.5 o 2.5 Supported nitrogen-doped graphene (NG) nanocomposites (Fe 1.833 (OH) 0.5 o 2.5 / NG) and its one-pot simple preparation method

Method used

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  • fe <sub>1.833</sub> (oh) <sub>0.5</sub> o <sub>2.5</sub> Nitrogen-doped graphene nanocomposite material and preparation method thereof
  • fe <sub>1.833</sub> (oh) <sub>0.5</sub> o <sub>2.5</sub> Nitrogen-doped graphene nanocomposite material and preparation method thereof
  • fe <sub>1.833</sub> (oh) <sub>0.5</sub> o <sub>2.5</sub> Nitrogen-doped graphene nanocomposite material and preparation method thereof

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preparation example Construction

[0031] Such as figure 1 As shown, a Fe 1.833 (OH) 0.5 o 2.5 Supported nitrogen-doped graphene (NG) nanocomposites (Fe 1.833 (OH) 0.5 o 2.5 / NG) and a preparation method thereof, the method comprising the following steps:

[0032] Step 1, adopt the improved Hummers method to prepare graphite oxide solid with natural graphite powder;

[0033] Step 2, under ultrasound, prepare a DMF suspension of graphene oxide, the ratio of graphite oxide and ethanol solvent is 1 ~ 0.2 mg / mL; ultrasound time is 5 ~ 24 h;

[0034] Step 3, add FeCl 2 4H 2 O into the suspension and stir well, graphite oxide and FeCl 2 4H 2 The mass ratio of O is 1: 3 ~ 2: 1 mg / mg;

[0035] Step 4, mix the mixture of step 3 with NH 3 ·H 2 After O is mixed, it is quickly loaded into a hydrothermal reactor and heated for reaction; graphite oxide and NH 3 ·H 2 The ratio of O is 1:1 ~ 1:5 mg / μL; the reaction temperature is 160 ~ 200 ℃; the reaction time is 10 ~ 24h;

[0036] Step 5, after washing and dry...

Embodiment 1

[0038] The first step, the preparation of graphite oxide solid;

[0039] Preoxidize 20 g of natural graphite with 30 mL of concentrated sulfuric acid, 10 g of potassium persulfate and 10 g of phosphorus pentoxide at 80 °C, wash with water to pH = 7, and dry overnight at room temperature for use;

[0040] Cool 460 mL of concentrated sulfuric acid to about 0 °C, then add 20 g of pre-oxidized graphite into it, slowly add 60 g of potassium permanganate, so that the temperature of the system does not exceed 20 °C, after the addition is completed, raise the temperature to 35 °C, and stir After 2 h, 920 mL of deionized water was slowly added in batches so that the system temperature did not exceed 98 °C. After stirring for another 15 minutes, 2.8 L of deionized water and 50 mL of 30% hydrogen peroxide were added. The resulting bright yellow suspension was filtered under reduced pressure and washed. Until there is no sulfate ion in the filtrate, and when it is neutral, the product is...

Embodiment 2

[0049] The first step is the same as Step 1 in Example 1.

[0050] In the second step, put 50 mg of graphite oxide powder into a round bottom flask, then add 50 mL of ethanol solvent, and obtain a graphene oxide (GO) suspension after ultrasonication for 24 h;

[0051] In the third step, add 0.15 g FeCl 2 4H 2 O to the suspension in step 2 and stir evenly;

[0052] In the fourth step, mix the mixture from step 3 with 250 μL NH 3 ·H 2 After O was mixed, it was quickly put into a hydrothermal reactor, and heated at 180 °C for 12 h;

[0053] The fifth step is the same as step five in Example 1.

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Abstract

The invention discloses a Fe 1.833 (OH) 0.5 o 2.5 A nitrogen-doped graphene nanocomposite material loaded with nitrogen and a preparation method thereof, the steps of which are: using graphite oxide solids to prepare an ethanol suspension of graphene oxide under ultrasound; adding FeCl 2 4H 2 O into the suspension and stir well; mix the suspension with NH 3 ·H 2 After mixing O, a rapid hydrothermal reaction, graphite oxide and NH 3 ·H 2 The ratio of O is 1:1~1:5 mg / μl; the reaction temperature is 160~200°C; the nanocomposite material can be obtained after washing and drying. The preparation of the nanocomposite material is a scientific and comprehensive nanometer metal oxidation A one-pot hydrothermal assembly method for in situ growth and simultaneous reduction of graphene oxide. The hybrid material synthesized by the invention has simple and efficient synthesis steps, is easy to prepare in large quantities, and is especially suitable for the electrochemical catalysis detection and analysis of nitrite.

Description

technical field [0001] The present invention relates to a kind of functionalized graphene nanometer material and preparation method thereof, especially a kind of Fe 1.833 (OH) 0.5 o 2.5 Supported nitrogen-doped graphene (NG) nanocomposites (Fe 1.833 (OH) 0.5 o 2.5 / NG) and a preparation method thereof, belonging to the field of material preparation. Background technique [0002] Human beings use a lot of nitrogen-containing fertilizers in farming and a large amount of industrial wastewater is discharged, and the surface water resources available for human use are being polluted. Such environmental problems have attracted worldwide attention. Nitrite pollution in drinking water can lead to many diseases such as methemoglobinemia, blue baby syndrome and gastric cancer. The World Health Organization stipulates that the content of nitrite in drinking water should not exceed 3 mgL -1 . Due to the harmful effects of nitrite on the environment and human health, the sensitiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30C01G49/02B82Y30/00
Inventor 张树鹏刘茂祥宋海欧高娟娟钱悦月王霜谢康俊
Owner NANJING UNIV OF SCI & TECH
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