Preparing method and application of compound titanate nanotube photocatalyst

A composite titanate and photocatalyst technology, which is applied in the field of nanotube photocatalyst preparation, can solve problems such as poor stability, small loading capacity, and complex process, and achieve simple process, improved spectral response range, and improved quantum efficiency and optical efficiency. The effect of catalytic hydrogen production performance

Inactive Publication Date: 2008-07-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the existing preparation process of composite titanate nanotube catalyst is complex, the loading capacity is small, it can only be excited by ultraviolet light, and the stability is poor, and a composite titanate nanotube catalyst is provided. Preparation method and application of tube photocatalyst

Method used

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specific Embodiment approach 1

[0012] Specific implementation mode one: the preparation method of composite titanate nanotube photocatalyst in this embodiment is as follows: one, titanate and diluent are made into solution according to the volume ratio of 1:10; The mass ratio of ionized water is 0.2-18:100. Dissolve metal salt in deionized water, slowly drop concentrated nitric acid, the volume ratio of concentrated nitric acid and dissolved metal salt in deionized water is 1:5, and then stir evenly to make Solution; 3. Drop the solution prepared in step 2 into the solution prepared in step 1, so that the mass ratio of the metal salt in the solution to the titanium dioxide contained in the solution in step 1 is 0.01-40: 100, stir for 30-60 minutes, and prepare into a sol; 4. Dry the sol for 8-16 hours at 50-100°C, then put it into a crucible and sinter it at 200-1000°C for 4-6 hours, then mix the product with aqueous sodium hydroxide solution at 0.2-30: Disperse in 4-16mol / L sodium hydroxide aqueous solutio...

specific Embodiment approach 2

[0013] Embodiment 2: This embodiment differs from Embodiment 1 in that in step 2, the metal salt and deionized water are dissolved in deionized water at a mass ratio of 0.3-5:100. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0014] Embodiment 3: This embodiment differs from Embodiment 1 in that in step 2, the metal salt and deionized water are dissolved in deionized water at a mass ratio of 5.5-10:100. Others are the same as in the first embodiment.

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Abstract

The invention discloses a preparation method of a composite titanate nano tube photocatalyst and application thereof, which relates to a preparation method of a nano tube photocatalyst and application thereof. The invention solves the problems that the present composite titanate nano tube photocatalysts have complicate preparation techniques, small loading which is only excited by ultraviolet light with poor stability. The method of the invention is as follows: metal salt is dissolved into ionized water, in which concentrated nitric acid is dripped, then the solution obtained is dripped into the solution prepared by titanium ester and diluent to be stirred, dried and sintered, then yield obtained is dispersed into oxyhydrogen sodium solution; after being reacted for 24-72 hours, the solution is washed to neutral before being carried out temperature reduction and heat preservation. The photocatalyst of the invention has high metal loading or the oxide loading which not only can be excited by the ultraviolet light but also can be excited by visible light. The catalytic performance of the invention is 3-15 times higher than common catalyst activity and can be used more than 100h stably, and service life thereof is 100-1000 hours. The method of the invention has simple technique.

Description

technical field [0001] The invention relates to a preparation method and application of a nanotube photocatalyst. Background technique [0002] With the continuous development of human society, human activities and industrial production have continuously aggravated environmental pollution, and at the same time there has been a shortage of energy sources. How to control environmental pollution and find new energy sources has attracted more and more attention. Hydrogen, as a pollution-free and renewable energy among all energy sources, is undoubtedly a new generation of energy that will be widely used after non-renewable energy such as oil, coal and natural gas. [0003] Photocatalytic technology can solve energy and environmental problems well. The traditional preparation of composite metal / titanate nanotubes or metal oxide / titanate nanotubes mostly uses photolysis, γ-ray irradiation to decompose metal salts or chemical reduction, which requires TiO 2 Three steps of prepara...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50B01J23/72B01J23/745B01J23/755B01J21/06
Inventor 李中华陈刚尚志强
Owner HARBIN INST OF TECH
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