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Preparation method of nitrogen-doped carbon-cerium composite nanosheets

A nanosheet and nitrogen-doped technology, which is applied in separation methods, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem of no obvious effect of catalytic oxidation, improve visible light absorption capacity, and be easy to operate , Improve the effect of photocatalytic activity

Inactive Publication Date: 2018-10-09
NEIJIANG NORMAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem solved by the present invention is to provide a method for preparing nitrogen-doped carbon-cerium composite nanosheets, which solves the problem that ordinary micron-sized ceria particles have no obvious effect on catalytic oxidation in the prior art

Method used

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  • Preparation method of nitrogen-doped carbon-cerium composite nanosheets
  • Preparation method of nitrogen-doped carbon-cerium composite nanosheets
  • Preparation method of nitrogen-doped carbon-cerium composite nanosheets

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Embodiment 1

[0032] This embodiment provides a method for preparing nitrogen-doped carbon-magnesium composite nanosheets of the present invention, specifically:

[0033] Step 1. Preparation of cerium salt slurry: cerium nitrate hexahydrate (Ce(NO) 3 ·6H 2 O): 1.3026g and hexamethylenetetramine (C 6 h 12 N 4 ): 2.9469g was added to 70mL deionized water, stirred evenly at a constant temperature of 25°C, then 3mL of glacial acetic acid was added to adjust the pH of the system to 8.5, and stirred at a constant temperature of 25°C and a stirring speed of 450r / min for 4h to obtain cerium salt slurry;

[0034] Step 2. Prepare basic cerium carbonate precursor: put the cerium salt slurry solution into a hydrothermal reaction kettle and react at 160°C for 12 hours to obtain basic cerium carbonate slurry. After natural cooling, remove the supernatant, and The remaining slurry is centrifuged, and the obtained filter cake is washed with deionized water and ethanol for 3 times respectively; then dr...

Embodiment 2

[0040] This embodiment provides a method for preparing nitrogen-doped carbon-magnesium composite nanosheets of the present invention, specifically:

[0041] Step 1. Preparation of cerium salt slurry: cerium nitrate hexahydrate (Ce(NO) 3 ·6H 2 O): 5.8514g and hexamethylenetetramine (C 6 h 12 N 4): Add 9.5842g to 50mL deionized water, stir evenly at a constant temperature of 50°C, then add 1mL of sulfuric acid to adjust the pH of the system to 4.5, and stir at a constant temperature of 50°C and a stirring speed of 400r / min for 2h to obtain cerium salt slurry;

[0042] Step 2. Prepare basic cerium carbonate precursor: put the cerium salt slurry solution into a hydrothermal reactor and react at 180°C for 10 hours to obtain basic cerium carbonate slurry. After natural cooling, remove the supernatant, and The remaining slurry is centrifuged, and the obtained filter cake is washed with deionized water and ethanol for 3 times respectively; then dried to obtain the basic cerium ca...

Embodiment 3

[0048] This embodiment provides a method for preparing nitrogen-doped carbon-magnesium composite nanosheets of the present invention, specifically:

[0049] Step 1. Preparation of cerium salt slurry: Add 3.5185g of cerium carbonate and ammonia water (1moL / L): 5.0568g into 80mL of deionized water, stir evenly at a constant temperature of 35°C, then add 5mL of hydrochloric acid, adjust the pH value to 6, and Stir at a constant temperature for 5 hours at a temperature of 35°C and a stirring speed of 800r / min to prepare a cerium salt slurry;

[0050] Step 2. Prepare basic cerium carbonate precursor: put the cerium salt slurry solution into a hydrothermal reactor and react at 140° C. for 15 hours to obtain basic cerium carbonate slurry. After natural cooling, remove the supernatant, and The remaining slurry is centrifuged, and the obtained filter cake is washed with deionized water and ethanol for 3 times respectively; then dried to obtain the basic cerium carbonate precursor;

[...

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Abstract

The invention discloses a preparation method of nitrogen-doped carbon-cerium composite nanosheets, and solves the problem that in the prior art, common micro cerium dioxide particles do not have obvious effect on catalytic oxidation. The method comprises the following steps: taking cerium salt and a nitrogen-containing compound, adding deionized water and stirring at constant temperature, then adding an acid solution, and stirring at a constant temperature to obtain cerium salt slurry; reacting at a high temperature to obtain basic cerium carbonate slurry, and cooling, centrifuging, washing and drying to obtain a basic cerium carbonate precursor; then roasting to obtain cerium dioxide nanosheets; mixing the cerium dioxide nanosheet with an ethanol solution and the deionized water, then adding cyanamide and a surfactant, stirring at a constant temperature, reacting at a high temperature, cooling, and then centrifuging, washing and drying to obtain a nitrogen doped carbon-cerium composite nanosheet precursor; and then roasting at the atmosphere of inert gas to obtain the nitrogen-doped carbon-cerium composite nanosheets. The nitrogen-doped carbon-cerium composite nanosheets are lightin weight and high in photocatalytic activity.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a preparation method of nitrogen-doped carbon-cerium composite nanosheets. Background technique [0002] With the development of industrial and agricultural modernization, a large number of toxic, harmful and refractory organic pollutants (such as chlorophenols, pesticides, etc.) are put into the water environment to cause water pollution; at the same time, the gas pollution caused by automobile exhaust emissions has seriously threatened human existence. For these two types of pollutants, using the catalytic oxidation function of rare earth metal nanomaterials can effectively degrade pesticide wastewater, and can make CO and NO in automobile exhaust х It is transformed into carbon dioxide and nitrogen that are harmless to human body and environment, and has good economic and social effects. Therefore, it has attracted widespread attention. [0003] CeO 2...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J20/02B01J35/02B01J35/10C02F1/30B01D53/86B01D53/56C02F1/28B01D53/62C02F101/30
CPCB01D53/8628B01D53/864B01J20/0207C02F1/281C02F1/30B01J27/24C02F2101/308B01J35/39B01J35/00B01J35/30B01J35/60
Inventor 郑小刚李琴任莉英李达伟王丹袁小智周远亮
Owner NEIJIANG NORMAL UNIV
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