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Surface gaseous penetration modification method of nanometer titanium dioxide film photocatalyst

A nano-titanium dioxide, photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problems of low hydrogen production efficiency of titanium dioxide thin films, and achieve improved performance, improved efficiency, and simple process. Effect

Active Publication Date: 2012-01-18
HARBIN INST OF TECH
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of low hydrogen production efficiency of existing titanium dioxide thin films used for photocatalytic hydrogen production. The present invention provides a method for modifying the surface of nano titanium dioxide thin film photocatalysts by gas phase diffusion and permeation

Method used

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  • Surface gaseous penetration modification method of nanometer titanium dioxide film photocatalyst
  • Surface gaseous penetration modification method of nanometer titanium dioxide film photocatalyst
  • Surface gaseous penetration modification method of nanometer titanium dioxide film photocatalyst

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specific Embodiment approach 1

[0016] Specific embodiment 1: The nano-titanium dioxide thin film photocatalyst surface vapor phase diffusion modification method of the present embodiment is realized through the following steps: 1. Prepare a nano-titanium dioxide thin film on a titanium substrate: pretreat the titanium substrate to remove the surface oxide film, Then put the pretreated titanium substrate as the working electrode in the electrolyte, and the copper sheet as the counter electrode, control the reaction voltage to 10~30V, and carry out constant voltage anodization for 20~120min, that is, obtain nano-titanium dioxide film on the titanium substrate, The electrolyte composition is: 5~6g / L NaF and 2%~5% H 3 PO 4 Solution, the solvent is water; 2. Heat the carburizing furnace to 500~800°C, keep it warm, then drop methanol into the carburizing furnace, stop adding methanol after continuing to drop for 10~30min, and then put the Put the titanium matrix on the sample holder of the carburizing furnace, a...

specific Embodiment approach 2

[0019] Embodiment 2: This embodiment differs from Embodiment 1 in that the titanium substrate in step 1 is commercially pure titanium, TC4 titanium alloy, titanium-nickel alloy or titanium-niobium alloy. Other steps and parameters are the same as those in Embodiment 1.

[0020] In this embodiment, the commercially pure titanium is TA1 or TA2.

specific Embodiment approach 3

[0021] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 1, the reaction voltage is controlled to be 15-25V. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention provides a surface gaseous penetration modification method of a nanometer titanium dioxide film photocatalyst, which relates to the penetration modification method of the nanometer titanium dioxide film photocatalyst. The invention solves the problem of low hydrogen production efficiency of the titanium dioxide film used for catalysis hydrogen preparation. The method of the invention comprises the following steps: using an anodic oxidation method for preparing the nanometer titanium dioxide film on a titanium substrate; then, heating a dripping penetration furnace to 500 to 800 DEG C; dripping methanol into the dripping penetration furnace for exhausting the air in the dripping penetration furnace; then, placing the treated titanium substrate into the dripping penetration furnace; and next, dripping penetration agents into the dripping penetration furnace. The method of the invention modifies the carbon, the carbon and the nitrogen, the carbon and the rare earth elements, or the carbon, and the nitrogen and the rare earth elements onto the surface of the nanometer titanium dioxide film and into the crystal lattices, the hydrogen production speed of the photocatalysishydrogen production of the obtained modified nanometer titanium dioxide photocatalyst is 1.16 to 1.48 times of that of the titanium dioxide film without carrying out gaseous penetration treatment, and the photocatalysis hydrogen production performance is greatly improved.

Description

technical field [0001] The invention relates to a method for modifying the diffusion and penetration of nanometer titanium dioxide film photocatalyst. Background technique [0002] As human beings enter the 21st century and social development accelerates, traditional resources such as coal, natural gas, and oil are facing the trend of depletion, and at the same time, the environmental problems brought about by these energy sources are also becoming more and more serious. A new industrial revolution is emerging with the goal of saving energy and resources, protecting the ecological environment, reducing environmental pollution, and achieving sustainable development. As a clean new energy source, solar energy has the advantages of being inexhaustible and inexhaustible without causing any pollution. Since 1972, fujishima and honda discovered TiO 2 Photoelectrochemical splitting of water to generate H 2 Since then, the work of producing hydrogen energy through the development...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J27/20B01J21/06B01J37/34C01B3/04
CPCY02E60/364Y02E60/36
Inventor 姜兆华姚忠平贾方舟李春香
Owner HARBIN INST OF TECH
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