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Preparation method of nano TiO2 thin-film material

A thin-film material and thin-film preparation technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve problems such as low catalytic efficiency and loss, and achieve low cost, conducive to industrial production, photocatalytic The effect of high degradation rate

Inactive Publication Date: 2013-04-17
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

TiO 2 Photocatalysts can only absorb short-wavelength ultraviolet rays for excitation because of their wide band gap energy, which only accounts for about 4% of the solar rays irradiated on the ground; in addition, most of the photogenerated carriers will regenerate before migrating to the surface of the catalyst. Recombination, the absorbed light energy is lost in the form of heat or fluorescence, so the catalytic efficiency is low

Method used

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  • Preparation method of nano TiO2 thin-film material
  • Preparation method of nano TiO2 thin-film material
  • Preparation method of nano TiO2 thin-film material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Raw material: 25mm×15mm×2mm rectangular pure titanium sheet, 10g / L Na 3 PO 4 Solution, 1g / L NaF solution, 0.05mol / L copper sulfate solution.

[0014] Step 1: Place the pretreated titanium sheet on the micro-arc oxidation equipment for micro-arc oxidation (the sample is immersed in the treatment solution as the anode, and the stainless steel container with the cooling system is used as the cathode). The experimental parameters are: voltage 420V, preparation Time 30min, Na in phosphate electrolyte system 3 PO 4 The concentration is 10g / L, the NaF concentration is 1g / L, and the electrolysis temperature is controlled below 35℃; then the prepared nano-TiO 2 The films were rinsed with deionized water and dried.

[0015] Step 2: The prepared nano-TiO 2 The film was immersed in a copper sulfate solution with a concentration of 0.05 mol / L for 12 h, then taken out, washed with deionized water, and air-dried.

Embodiment 2

[0017] Raw material: 25mm×15mm×2mm rectangular pure titanium sheet, 10g / L Na 3 PO 4 Solution, 1g / L NaF solution, 0.075mol / L silver nitrate solution.

[0018] Step 1: Place the pretreated titanium sheet on the micro-arc oxidation equipment for micro-arc oxidation (the sample is immersed in the treatment solution as the anode, and the stainless steel container with the cooling system is used as the cathode). The experimental parameters are: voltage 420V, preparation Time 30min, Na in phosphate electrolyte system 3 PO 4 The concentration is 10g / L, the NaF concentration is 1g / L, and the electrolysis temperature is controlled below 35℃; then the prepared nano-TiO 2 The films were rinsed with deionized water and dried.

[0019] Step 2: The prepared nano-TiO 2 The film was immersed in a silver nitrate solution with a concentration of 0.075 mol / L for 14 h, then taken out, washed with deionized water, and air-dried.

Embodiment 3

[0021] Raw material: 25mm×15mm×2mm rectangular pure titanium sheet, 10g / L Na 3 PO 4 Solution, 1g / L NaF solution, 0.1mol / L cerium nitrate solution.

[0022] Step 1: Place the pretreated titanium sheet on the micro-arc oxidation equipment for micro-arc oxidation (the sample is immersed in the treatment solution as the anode, and the stainless steel container with the cooling system is used as the cathode). The experimental parameters are: voltage 420V, preparation Time 30min, Na in phosphate electrolyte system 3 PO 4 The concentration is 10g / L, the NaF concentration is 1g / L, and the electrolysis temperature is controlled below 35℃; then the prepared nano-TiO 2 The films were rinsed with deionized water and dried.

[0023] Step 2: The prepared nano-TiO 2 The film was immersed in a cerium nitrate solution with a concentration of 0.1 mol / L for 15 h, then taken out, washed with deionized water, and air-dried.

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Abstract

The invention discloses a preparation method of nano TiO2 thin-film material. The method comprises the following steps: firstly, preparing a pure titanium sheet into rectangular sheets of 25*15*2mm, secondly, pretreatment of the titanium sheet: sanding, degreasing, hydrochloric acidizing fluid rinsing, ultrasonic deionized water washing and vacuum drying, thirdly, laying the pretreated titanium sheet on micro-arc oxidation equipment, so as to be conducted to micro-arc oxidation, taking the titanium sheet as anode to be dipped into treating fluid and a stainless steel container with a cooling system as cathode, and fourthly, performing deionized water washing and drying to an obtained nano TiO2 thin-film, and then performing ion dipping to the thin-film, wherein experiment parameters are as follows: voltage is 420V, the preparation time is 30min, the content of Na3PO4 in a phosphate electrolyte system is 10g / L, the content of NaF is 1g / L, and the electrolyzing temperature is controlled to be below 35 DEG C. The method has the advantages that the photocatalytic degradation rate of the nano TiO2 thin-film exceeds 50 percent, the raw material is chip and common, the technology is simple, the cost is low, and the method is beneficial to industrial production.

Description

technical field [0001] The present invention relates to a kind of nanometer TiO 2 Preparation method of thin film material. Background technique [0002] In recent years, with the further in-depth research on photocatalytic technology, TiO as a semiconductor material 2 It has become the most popular nano-photocatalyst material in the world because of its own characteristics such as non-toxicity, low price, high activity and high stability. Through the micro-arc oxidation technology (MAO-Microarc Oxidation), a layer of TiO that is firmly bonded to the substrate can be produced on the surface of the titanium plate 2 The film has good wear resistance, corrosion resistance, high temperature impact resistance and other characteristics. But TiO 2 As a photocatalyst, the most prominent defect in its practical application is the utilization rate of solar energy. TiO 2 Due to the wide band gap, photocatalysts can only absorb ultraviolet rays with shorter wavelengths for excitat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/055B01J27/25B01J21/06B01J37/34B01J37/02
Inventor 宋仁国李鑫伟项博王超
Owner CHANGZHOU UNIV
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