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Metal oxide/carbon nitride composite material and preparation method and application thereof

A composite material, carbon nitride technology, applied in the directions of peroxide/peroxyhydrate/peroxyacid/superoxide/ozone, chemical instruments and methods, non-metallic elements, etc., can solve explosion hazards, production Complex system, high toxicity and other problems, to achieve the effect of less demanding equipment requirements, simple preparation process and mild reaction conditions

Active Publication Date: 2015-11-11
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is that the production system is complex, the production process consumes a lot of energy, and the H 2 o 2 Existing with organic substances in the reaction system at the same time, it is easy to cause explosion hazard and high toxicity
However, this method requires the use of organic alcohols to provide hydrogen sources, which significantly increases production costs, and produces carbon emission pollution problems, which cannot achieve clean production

Method used

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  • Metal oxide/carbon nitride composite material and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A. Weigh 0.0872g of nickel nitrate, 0.0404g of ferric nitrate, 0.1201g of urea, and 0.0741g of ammonium fluoride, dissolve them in 50mL of deionized water, and sonicate for 5min to obtain solution A.

[0026] B. Add 2.76 g of C to solution A 3 N 4 , ultrasonically stirred at the same time for 20min, moved to a hydrothermal kettle to react at 120°C for 12h, cooled to room temperature, filtered and washed to pH = 7, dried at 70°C for 12h to obtain NiFe-LDH / C 3 N 4 .

[0027] C. NiFe-LDH / C obtained in step B 3 N 4 Put it in a muffle furnace and roast in the air. The roasting conditions are as follows: increase the temperature at a rate of 5 °C / min to 300 °C and keep it for 1 h to obtain NiFe composite oxide / C 3 N 4 .

Embodiment 2

[0029] A. Weigh 0.1104g of nickel sulfate, 0.0735g of iron sulfate, 0.1682g of urea, and 0.2074g of ammonium fluoride, dissolve them in 70mL of deionized water, and sonicate for 5 minutes to obtain solution A.

[0030] B. Add 2.576 g of C to solution A 3 N 4 , ultrasonically stirred at the same time for 20min, moved to a hydrothermal kettle to react at 140°C for 12h, cooled to room temperature, filtered and washed to pH = 7, dried at 80°C for 10h to obtain NiFe-LDH / C 3 N 4 .

[0031] C. NiFe-LDH / C obtained in step B 3 N 4 Place in a muffle furnace and roast in nitrogen. The roasting conditions are as follows: increase the temperature at a rate of 5 °C / min to 300 °C and keep it for 2 hours to obtain NiFe composite oxide / C 3 N 4 .

Embodiment 3

[0033] A. Weigh 0.1426g of nickel chloride, 0.05418g of ferric chloride, 0.2402g of urea, and 0.2963g of ammonium fluoride, dissolve them in 100mL of deionized water, and sonicate for 5 minutes to obtain solution A.

[0034] B. Add 5.52 g of C to solution A 3 N 4 , ultrasonically stirred at the same time for 20min, moved to a hydrothermal kettle to react at 120°C for 12h, cooled to room temperature, filtered and washed to pH = 7, dried at 70°C for 12h to obtain NiFe-LDH / C 3 N 4 .

[0035] C. NiFe-LDH / C obtained in step B 3 N 4 Put it in a muffle furnace and roast in the air. The calcining conditions are: increase the temperature at a rate of 10 °C / min to 400 °C and keep it for 1 h to obtain NiFe composite oxide / C 3 N 4 .

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Abstract

The invention provides a metal oxide / carbon nitride composite material and a preparation method and application thereof. The preparation method of the metal oxide / carbon nitride composite material comprises the steps that metal salts, a precipitant and a complexing agent are dissolved into water to form a solution, carbon nitride is added into the solution, after ultrasonic and sufficient stirring is performed uniformly, the solution is placed into a hydrothermal kettle for a reaction, the thermometal hydroxide / carbon nitride (LDH / C3N4) composite material is generated, roasting is performed in the air or inert atmosphere, the thermometal hydroxide is dehydrated, anions between layers are removed, the structure is converted into the composite metal oxide, the structure of the carbon nitride is not changed in the process, and therefore the metal oxide / carbon nitride composite material is obtained. The composite material is used as a catalyst used in the photic driving H2O2 production process, and is the catalyst for producing H2O2 by using water and oxygen as raw materials, and clean production of H2O2 can be achieved at normal temperature and normal pressure.

Description

technical field [0001] The invention belongs to the field of preparation of catalytic materials, in particular to a composite material of metal oxide and carbon nitride and a preparation method thereof, and is used for clean production of hydrogen peroxide driven by sunlight. Background technique [0002] The demand for energy in today's society is becoming more and more urgent, but the ensuing problems such as energy shortage and environmental degradation are becoming more and more prominent. The development of renewable and clean energy is an important way to solve these problems. Solar energy is regarded as one of the important objects of new energy utilization due to its huge energy volume and clean and pollution-free use process. Hydrogen peroxide (H 2 o 2 ) is an important form of solar fuel that can be synthesized by photosynthesis. When it is used as an energy source, the product is only H 2 O or O 2 , no carbon emissions, is a clean energy source with great deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C01B15/027
CPCB01J27/24C01B15/027
Inventor 项顼王瑞瑞潘科成
Owner BEIJING UNIV OF CHEM TECH