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Method for preparing water splitting hydrogen production catalyst by using nitrogen-containing polymer modified titanium dioxide

A titanium dioxide and photocatalyst technology, applied in the field of photocatalysis, can solve the problems of poor visible light absorption ability, unsatisfactory and other problems

Inactive Publication Date: 2019-08-16
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, titania is not ideal for efficient photocatalytic hydrogen production because of the high bandgap width of 3–3.2 eV.
In addition, poor visible light absorption results in less than 5% of the energy in solar radiation being utilized by titanium dioxide

Method used

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  • Method for preparing water splitting hydrogen production catalyst by using nitrogen-containing polymer modified titanium dioxide
  • Method for preparing water splitting hydrogen production catalyst by using nitrogen-containing polymer modified titanium dioxide
  • Method for preparing water splitting hydrogen production catalyst by using nitrogen-containing polymer modified titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Mix 1 g of anatase titanium dioxide, 1 mg of cyclohexanone octahydrate and 1 mg of melamine in a mortar and grind for one hour.

[0030] 2. Then add the ground mixture into glacial acetic acid and keep the temperature at 35°C and stir for one hour. The stirred suspension was freeze-dried.

[0031] 3. Heat the freeze-dried powder to 600°C at a rate of 5°C per minute under the protection of argon, and obtain TiO after holding for one hour. 2 @COP HM -1.

Embodiment 2

[0033] 1. Mix 1 g of anatase titanium dioxide, 0.1 mg of cyclohexanone octahydrate and 0.1 mg of melamine in a mortar and grind for one hour.

[0034] 2. Then add the ground mixture into glacial acetic acid and keep the temperature at 35°C and stir for one hour. The stirred suspension was freeze-dried.

[0035] 3. Heat the freeze-dried powder to 600°C at a rate of 5°C per minute under the protection of argon, and obtain TiO after holding for one hour. 2 @COP HM -0.1.

Embodiment 3

[0037] 1. Mix 1 g of anatase titanium dioxide, 10 mg of cyclohexanone octahydrate and 10 mg of melamine in a mortar and grind for one hour.

[0038] 2. Then add the ground mixture into glacial acetic acid and keep the temperature at 35°C and stir for one hour. The stirred suspension was freeze-dried.

[0039] 3. Heat the freeze-dried powder to 600°C at a rate of 5°C per minute under the protection of argon, and obtain TiO after holding for one hour. 2 @COP HM -10.

[0040]Method for hydrogen production by photolysis of water: The hydrogen production experiment was carried out in a Pyrex glass bottle with a volume of 145ml, and the hydrogen production experiment was carried out at room temperature and normal pressure. During the test, 5 mg of photocatalyst was dispersed into 80 ml of 10% methanol aqueous solution, and methanol was used as a sacrificial agent for donating electrons. After adding 17 μL of chloroplatinic acid and ultrasonically stirring for 30 minutes, the sol...

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Abstract

A method for preparing a water splitting hydrogen production catalyst by using nitrogen-containing polymer modified titanium dioxide belongs to the field of photocatalysis. A novel covalent organic polymer COPHM with high nitrogen grows in situ on the surface of anatase titanium dioxide. The method comprises the following steps: mixing anatase titanium dioxide, hexaketocyclohexane octahydrate andmelamine in a mortar according to a certain ratio, and grinding and uniformly mixing the obtained mixture; adding the ground mixture to glacial acetic acid, and performing stirring at a kept temperature of 20-70 DEG C for at least 0.5 h; and freeze-drying the obtained stirred suspension to remove the glacial acetic acid, and calcining the freeze-dried powder under the protection of argon to obtainthe covalent organic polymer modified high-efficiency photocatalyst having a core-shell structure. The catalyst can realize high-efficiency water splitting for producing hydrogen, and is of great significance for the high-efficiency production of clean energy.

Description

technical field [0001] The invention belongs to the field of photocatalysis, and relates to a method for preparing a catalyst for photolysis of water to produce hydrogen by modifying titanium dioxide with a nitrogen-containing polymer; it is particularly suitable for the application of high-efficiency photocatalysis of water splitting for hydrogen production. Background technique [0002] With the accelerated development of globalization and industrialization, a series of serious problems such as environmental pollution and energy shortage have emerged and attracted a lot of attention. As an abundant, clean and renewable energy source, solar energy has shown the potential to replace fossil energy sources. However, due to the scattered distribution of solar energy, low energy density, and instability, these problems prevent solar energy from becoming the core of the energy system. At present, the photovoltaic industry has become the main way of solar energy application, but ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06C01B3/04
CPCB01J31/069C01B3/042B01J35/398B01J35/39Y02E60/36
Inventor 刘广青周卓航黄燕
Owner BEIJING UNIV OF CHEM TECH