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Method for preparing porous titanium filtering material surface functionalization nano-structure film

A technology of surface functionalization and filtering materials, applied in chemical instruments and methods, filtration separation, separation methods, etc., can solve problems such as surface modification reports of porous structure titanium alloy materials, etc., to improve photocatalytic efficiency, diffusion Process reduction, the effect of increasing the filtration rate

Inactive Publication Date: 2008-02-13
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no report on the surface modification of porous titanium alloy materials

Method used

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  • Method for preparing porous titanium filtering material surface functionalization nano-structure film
  • Method for preparing porous titanium filtering material surface functionalization nano-structure film
  • Method for preparing porous titanium filtering material surface functionalization nano-structure film

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Embodiment 1

[0024] The industrial porous titanium alloy filter material is cleaned in sequence with ethanol, acetone and deionized water in ultrasonic, and dried in a hot air oven at 70°C to 80°C. At room temperature, the platinum sheet is used as the counter electrode (cathode), and the porous titanium alloy filter material is used as the anode; the 1M (NH 4 ) 2 SO 4 with 0.5wt% NH 4 F is the electrolyte, in the state of magneton stirring, an external voltage of 20V is applied, and the electrochemical reaction 2H is carried out. The oxidized porous titanium alloy filter material is washed several times until there is no F- and other ions except Ti cations on the surface and in the pores, and then dried at room temperature and placed in a hot air drying oven at 70°C to 80°C for 1 hour. The morphology of the titanium oxide nanotube array prepared by this process is shown in Fig. 1 .

Embodiment 2

[0026] The porous titanium alloy filter material is processed into a sample of 100×10×1mm by mechanical processing. After pretreatment, the applied voltage is 30V, and the volume ratio of ethylene glycol is 97%, and the volume ratio of water is 2.5%. The volume ratio of HF acid is 0.5%, and the anodic oxidation is carried out for 17 hours in the electrolyte solution whose pH value is adjusted to 6. Titanium dioxide nanotube arrays were washed with deionized water several times until there were no fluoride ions in the surface and pores, and no other ions except Ti cations, and placed in a drying oven at 70°C to 80°C for 1 hour. The morphology of the titanium oxide nanotube array prepared by this process is shown in Fig. 2 .

Embodiment 3

[0028] Process the porous titanium alloy filter material for industrial use into a sample of 100mm×10mm×1mm, clean it with ethanol, acetone and deionized water sequentially in ultrasonic, and dry it in a hot air oven at 70°C to 80°C. At room temperature, the platinum sheet is used as the counter electrode (cathode), and the porous titanium alloy filter material is used as the anode; the 1M (NH 4 ) 2 SO 4 with 0.5wt% NH 4 F is the electrolyte, in the state of magneton stirring, an external voltage of 15V is applied, and the electrochemical reaction is carried out for 25min. The oxidized porous titanium alloy filter material is washed several times until the surface is free of F- and other ions except Ti cations, dried at room temperature, placed in a hot air drying oven, and dried at 70°C to 80°C for 1 hour. The morphology of the titanium oxide nanotube array prepared by this process is shown in Fig. 3 .

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Abstract

The invention provides a method of preparing a functional nano structure film of the surface of a multi-hole titanium filtering material. The method is to deoil and clean the surface of a micro-hole alloy titanium slice and use the slice as the anode, use the inorganic or organic solution with fluorinion as the electrolyte, and a platinum electrode as the cathode, conduct anodic oxidation to a multi-hole titanium sample, and then anneal in the high temperature range of 430 to 600DEG C, so as to obtain a 1 to 120Mu m thick TiO2 nano structure array film on the multi-hole metal titanium. A composite structure prepared by the invention has functions and effects of photocatalysis organic sewage treatment, filtering and separation. Meanwhile, the titanium dioxide structure grows from the basal in situ, so that interfaces are firmly adhered, and preparation and loading of the photochemical catalyst can be completed at a time.

Description

technical field [0001] The invention relates to a method for modifying the surface of a metal porous material, in particular to a method for preparing a functionalized nanostructure membrane on the surface of a porous titanium filter material. Background technique [0002] Nano-TiO 2 It is an important inorganic functional material. Its good photoelectric, photosensitive, gas sensitive and pressure sensitive properties make it attractive in solar cells, photocatalytic degradation of pollutants, various sensors and anti-fog glass windows. Application prospects. Since Fujishima and Honda discovered in 1972 that continuous redox reactions occurred on the surface of titanium dioxide after ultraviolet light irradiation, nano-TiO 2 It has become a hotspot of research by domestic and foreign scholars. For example, in 1997, Wang et al. reported in the journal Nature that photoinduced TiO 2 The film produces amphiphilic (hydrophilic and lipophilic) properties; in 2005, Feng et al....

Claims

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Application Information

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IPC IPC(8): C25D11/26B01D39/20B01D71/02
Inventor 奚正平张文彦李广忠汪强兵李亚宁
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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