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Process for preparing photocatalyst composite material

A composite material and photocatalyst technology, applied in the field of preparation of photocatalyst composite materials, can solve the problems of unfavorable application, no activity, low surface coverage, etc., to improve the quantum reaction efficiency of free radicals, increase the utilization rate of light energy, and improve quantum efficiency Effect

Inactive Publication Date: 2006-01-25
SHANGHAI EAWADA ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a small reaction area and low photocatalytic efficiency.
[0007] 3. Composite electrodeposited photocatalytic powder material on foam metal nickel material: titanium dioxide powder is extremely difficult to disperse and maintain in ionic liquid, and the agglomerated particles are no longer nanomaterials; the surface coverage is too low, no more than 70%, low photocatalytic activity
This method requires two times of sintering, the fiber wall of the metal foam is extremely thin, the oxidation and sintering process will seriously affect the strength and flexibility of the metal foam, and the resulting product is brittle and has poor mechanical strength, which is not conducive to application. activity under

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1. Organotitanium sol configuration with photocatalytic activity.

[0041] (1) Weigh 200 g of n-butyl titanate, 735 grams of absolute ethanol, 10 grams of 37% hydrochloric acid or 40% concentration of sulfuric acid, 40 grams of tetraethyl orthosilicate, 5 grams of a mixed solution of copper sulfate and rare earth chloride , 10 grams of nano titanium dioxide powder;

[0042] (2) adding n-butyl titanate to ethanol under stirring, then dripping hydrochloric acid or sulfuric acid under high-speed stirring;

[0043] (3) Add the mixed solution of copper sulfate and rare earth chloride under stirring state;

[0044] (4) Under stirring state, irradiate with ultraviolet light for 20 hours;

[0045] (5) Under stirring state, add ethyl orthosilicate dropwise;

[0046] (6) Under the stirring state, add the nano-titanium dioxide powder assisted infiltration with ethanol and ultrasonic waves, and continuously stir for 1 to 3 hours;

[0047] (7) The prepared organic titanium sol wit...

Embodiment 2

[0056] Titanium sol and composite electrodeposition solution were prepared according to the requirements in Example 1, and the concentration of the anodic oxidation electrolyte was 0.5Mol.

[0057] 1. Select semi-finished nickel foam metal (70PPI, surface density 90 grams, thickness 2.5mm, produced by Shenzhen Ronglianxing Battery Material Co., Ltd. or self-produced using known technology), firstly carry out electrolytic treatment in the surface anodic oxidation electrolytic cell, select current 1.5 A, the time is 6 minutes; after taking it out, control the residual liquid, put it directly into the composite deposition tank for electroplating nickel, iron, rare earth alloys, the current is 10A, the electroplating time is 15 seconds, take it out, wash and dry it with water.

[0058] 2. Immediately immerse the surface-treated foam metal in the organic titanium sol with photocatalytic activity after drying, use the titanium plate as the anode, apply a DC voltage of 90 volts, and c...

Embodiment 3

[0063] Titanium sol and composite electrodeposition solution were configured according to the requirements in Example 1, and the concentration of the anodic oxidation electrolyte was 0.8Mol.

[0064] 1. Select cable-stayed metal mesh (thickness 0.05 mm, produced by Shenzhen Beichen Nonferrous Metals Co., Ltd.), firstly perform electrolytic treatment in the surface anodic oxidation electrolytic cell, select current 2A, and take 5 minutes; take it out, control the residual liquid, and put it directly into the Nickel, iron, and rare earth alloys were electroplated in the composite deposition tank with a current of 4A and an electroplating time of 20 seconds. After taking it out, it was washed with water and dried.

[0065] 2. Immediately immerse the surface-treated foam metal in the organic titanium sol with photocatalytic activity after drying, use the titanium plate as the anode, apply a DC voltage of 60 volts, and conduct electrophoretic deposition for 3 minutes.

[0066] 3. D...

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Abstract

A composite photo-catalyst for cleaning air and treating drinking water and sewage is prepared from foam metal or metallic net through electrochemical anodizing to its surface, flash plating in the low-concentration aqueous solution containing Cu and RE to form binding layer and diffusing layer, electrophoresis in the organo-titanium sol with photo-catalytic activity, drying in air and low-temp sintering. It has high specific surface area, photo-catalytic activity and antibacterial performance.

Description

Technical field: [0001] The invention relates to a method for preparing a photocatalyst composite material, in particular to a method for preparing a photocatalyst composite material in which nanometer photocatalyst materials are composited on foam metal or cable-stayed metal mesh. It belongs to the field of nanometer surface engineering. Background technique: [0002] Photocatalytic technology is the most ideal technology for air and water treatment with the most development prospects recognized at home and abroad. The research on related components in photocatalytic materials can be traced back to the nineteenth century. But it was not until the 1990s that Japanese scientists really discovered its great application value in the fields of health and environmental protection. In the past five years, Japan has used photocatalytic materials to create a wide variety of application products in the fields of textiles, drinking water treatment, cosmetics, food, medicine and air ...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J35/04B01J37/02C23C28/00
Inventor 王宝柱何峰
Owner SHANGHAI EAWADA ENVIRONMENTAL TECH CO LTD
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