Compound Pt/TiO(2-x)Nx catalyst with performance of preparing hydrogen through water decomposition by visible light as well as preparation and application of compound Pt/TiO(2-x)Nx catalyst

A tio2-xnx and water-splitting technology, which is applied to the visible light photocatalyst and its preparation and application fields, can solve the problems of only absorbing ultraviolet light and cannot be used, and achieves the effects of improving the photon quantum efficiency, uniform composition and easy mass production.

Inactive Publication Date: 2018-10-02
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nano-titanium dioxide is a very effective photocatalyst, but it also has the disadvantages that it can only absorb ultraviolet light and cannot use visible light, which accounts for 40% of sunlight.

Method used

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  • Compound Pt/TiO(2-x)Nx catalyst with performance of preparing hydrogen through water decomposition by visible light as well as preparation and application of compound Pt/TiO(2-x)Nx catalyst
  • Compound Pt/TiO(2-x)Nx catalyst with performance of preparing hydrogen through water decomposition by visible light as well as preparation and application of compound Pt/TiO(2-x)Nx catalyst
  • Compound Pt/TiO(2-x)Nx catalyst with performance of preparing hydrogen through water decomposition by visible light as well as preparation and application of compound Pt/TiO(2-x)Nx catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0034](1) Add 4.3ml of 0.1M nitric acid in ethanol to 90ml of tetraethyl orthosilicate ethanol solution with a volume ratio of 1:1, reflux at 70°C for 2 hours, and cool to room temperature. Take 90ml of the above solution, then add 44ml of butyl titanate ethanol solution with a volume ratio of 1:1 and stir. Then gradually add 9.2ml of 0.1M nitric acid ethanol solution, so that the amount of water is twice the sum of the amounts of titanium and silicon. Stand still until a gel is formed to obtain a titanium-silicon composite oxide gel, which is dried at 110°C, crushed, sieved, and calcined at 600°C for two hours. Weigh 2 grams after cooling, place in a tube furnace, flow rate is 400 ml / min in flowing ammonia, nitriding at 900 degrees Celsius for 5 hours, and cool to room temperature in nitrogen protection. Then placed in 2.0M sodium hydroxide solution, washed at 70 degrees Celsius for 12 hours, washed with water until neutral, and then dried at 110 degrees Celsius to obtain gr...

Embodiment 2

[0039] (1) Add 4.3ml of 0.1M nitric acid in ethanol to 90ml of tetraethyl orthosilicate in ethanol with a volume ratio of 1:1, reflux at 70°C for 2 hours, and cool to room temperature. Take 60ml of the above solution, then add 44ml of butyl titanate ethanol solution with a volume ratio of 1:1 and stir. Then gradually add 9.2ml of 0.1M nitric acid ethanol solution, so that the amount of water is twice the sum of the amounts of titanium and silicon. Stand still until a gel is formed to obtain a titanium-silicon composite oxide gel, which is dried at 110°C, crushed, sieved, and calcined at 600°C for two hours. Weigh 2 grams after cooling, place in a tube furnace, flow rate is 400 ml / min in flowing ammonia, nitriding at 900 degrees Celsius for 5 hours, and cool to room temperature in nitrogen protection. Then placed in 2.0M sodium hydroxide solution, washed at 70 degrees Celsius for 12 hours, washed with water until neutral, and then dried at 110 degrees Celsius to obtain gray po...

Embodiment 3

[0045] (1) Add 4.3ml of 0.1M nitric acid in ethanol to 90ml of tetraethyl orthosilicate in ethanol with a volume ratio of 1:1, reflux at 70°C for 2 hours, and cool to room temperature. Take 30ml of the above solution, then add 44ml of butyl titanate ethanol solution with a volume ratio of 1:1 and stir. Then gradually add 9.2ml of 0.1M nitric acid ethanol solution, so that the amount of water is twice the sum of the amounts of titanium and silicon. Stand still until a gel is formed to obtain a titanium-silicon composite oxide gel, which is dried at 110°C, crushed, sieved, and calcined at 600°C for two hours. Weigh 2 grams after cooling, place in a tube furnace, flow rate is 400 ml / min in flowing ammonia, nitriding at 900 degrees Celsius for 5 hours, and cool to room temperature in nitrogen protection. Then placed in 2.0M sodium hydroxide solution, washed at 70 degrees Celsius for 12 hours, washed with water until neutral, and then dried at 110 degrees Celsius to obtain gray po...

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Abstract

The invention relates to a compound Pt / TiO(2-x)Nx catalyst with the performance of preparing hydrogen through water decomposition by visible light as well as a preparation and application of the compound Pt / TiO(2-x)Nx catalyst. The catalyst is an aggregate formed by platinum particles and mesoporous nitrogen-doped titanium dioxide. The preparation method comprises the following steps: preparing titanium silicon compound oxide gel; preparing a mesoporous TiO(2-x)Nx compound solution; preparing platinum nanoparticle suspension; preparing the compound Pt / TiO(2-x)Nx catalyst. The catalyst is applied to preparation of the hydrogen by water photocatalytic decomposition taking the visible light as a light source. The preparation method disclosed by the invention has the advantages of being simplein process and equipment, easy to obtain, short in preparation period and easy in mass production; the obtained catalyst has the advantages of high specific surface area, wider visible light absorption range and high efficiency of preparation of the hydrogen through water decomposition by the visible light.

Description

technical field [0001] The invention belongs to the field of visible light photocatalyst and its preparation and application, in particular to a composite Pt / TiO with the performance of visible light splitting water to produce hydrogen 2-x N x Catalysts and their preparation and applications. Background technique [0002] Hydrogen energy is recognized as a clean energy source and is emerging as a low-carbon and zero-carbon energy source. In the 21st century, my country, the United States, Japan, Canada, and the European Union have all formulated hydrogen energy development plans, and currently my country has made many progresses in the field of hydrogen energy, and is expected to become a leading country in hydrogen energy technology and applications in the near future one. In addition, the conventional energy sources used today are non-renewable resources and are becoming increasingly depleted, so new sources of energy must be found. Hydrogen is just such a new secondary...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C01B3/04
CPCB01J27/24B01J35/004C01B3/042C01B2203/0277C01B2203/107C01B2203/1082Y02E60/36
Inventor 张青红韩鑫王宏志李耀刚侯成义
Owner DONGHUA UNIV
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