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Titanium dioxide nano thin film composite material and constant-current preparation method thereof

A nano-film and composite material technology, applied in the field of nano-porous film and its preparation, can solve the problems of high cost, complex template preparation process, unsuitable for mass production, etc., achieve obvious catalytic effect, low implementation cost, and easy operation

Inactive Publication Date: 2012-07-04
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pore arrangement of the porous material prepared by this method is highly ordered, and the shape and size of the obtained pores depend on the template structure, but the preparation process of the template is complicated and expensive, and is not suitable for mass production

Method used

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  • Titanium dioxide nano thin film composite material and constant-current preparation method thereof
  • Titanium dioxide nano thin film composite material and constant-current preparation method thereof
  • Titanium dioxide nano thin film composite material and constant-current preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Electrolyte concentration: nitric acid aqueous solution with a mass fraction of 30%

[0020] Electrolyte temperature: 70°C

[0021] Constant current density: 1mA / cm 2

[0022] Response time: 5400s

[0023] Sample area: 0.6cm 2

[0024] Step 1. Prepare amorphous Ti 30 Cu 70 Alloy strips (that is, the atomic percentages of titanium and copper are 30% and 70%), after being super-grown in absolute ethanol for 5 minutes, washed in deionized water and dried in air for later use;

[0025] Step 2, the dried amorphous Ti 30 Cu 70 The alloy strip is coated with silica gel on both sides. The coating thickness of the silica gel is 0.3mm, and a working length of 4cm is left when coating the silica gel; dry the coated sample and wait for the silica gel to harden;

[0026] Step 3: Prepare the nitric acid aqueous solution and pour it into a reaction vessel, place the reaction vessel in a 70°C water bath, and wait for a certain period of time until the temperature in the reacti...

Embodiment 2

[0030] Electrolyte concentration: nitric acid aqueous solution with a mass fraction of 20%

[0031] Electrolyte temperature: 80°C

[0032] Constant current density: 1.5mA / cm 2

[0033] Response time: 3600s

[0034] Sample area: 0.6cm 2

[0035] Step 1. Prepare amorphous Ti 50 Cu 50 Alloy strips (that is, the atomic percentages of titanium and copper are 50% and 50%), after being super-grown in absolute ethanol for 5 minutes, washed in deionized water and dried in air for later use;

[0036] Step 2, the dried amorphous Ti 50 Cu 50 The alloy strip is coated with silica gel on both sides. The coating thickness of the silica gel is 0.3mm, and a working length of 4cm is left when coating the silica gel; dry the coated sample and wait for the silica gel to harden;

[0037] Step 3: Prepare the nitric acid solution and pour it into a reaction vessel, place the reaction vessel in an 80°C water bath, and wait for a certain period of time until the temperature in the reaction ve...

Embodiment 3

[0041] Electrolyte concentration: nitric acid aqueous solution with a mass fraction of 35%

[0042] Electrolyte temperature: 50°C

[0043] Constant current density: 0.8mA / cm 2

[0044] Response time: 10800s

[0045] Sample area: 0.6cm 2

[0046] Step 1. Prepare amorphous Ti 20 Cu 80 Alloy strips, after being overgrown in absolute ethanol for 5 minutes, washed in deionized water and dried in air for later use;

[0047] Step 2, the dried amorphous Ti 20 Cu 80 The alloy strip is coated with silica gel on both sides. The coating thickness of the silica gel is 0.3mm, and a working length of 4cm is left when coating the silica gel; dry the coated sample and wait for the silica gel to harden;

[0048] Step 3: Prepare the nitric acid solution and pour it into a reaction vessel, place the reaction vessel in a 50°C water bath, and wait for a certain period of time until the temperature in the reaction vessel reaches 50°C;

[0049] Step 4, the electrode system and the above-men...

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Abstract

The invention discloses a titanium dioxide nano thin film composite material and a constant-current preparation method of the composite material. The constant-current preparation method comprises the steps of: placing an amorphous Ti-Cu alloy in an electrolysis solution, and carrying out dealloying process by utilizing a three-electrode system and adopting a constant-current method, wherein a netted platinum electrode is used as a counter electrode, a saturated calomel electrode is used as a reference electrode, the amorphous alloy Ti-Cu is used as a working electrode, the current density is 0.8-2mA / cm<2>, the dealloying time is 3600-10800s, the electrolysis solution is 20-50wt% nitric acid aqueous solution, and the electrolysis solution temperature is 50-80 DEG C. According to the technical scheme disclosed by the invention, Ti-Cu amorphous alloy strips are placed in the electrolysis solution, and dealloying is carried out by three-electrode system reaction, thus a nano porous thin film structure with uniform pore distribution is prepared, the implementation cost is low, the operation is simple and convenient, the reaction temperature is low and the method is an efficient and economical synthesis method.

Description

technical field [0001] The invention relates to a nanoporous film and a preparation method thereof, in particular to a nanoporous TiO with small pore size and high porosity applied in the field of electrocatalysis 2 Thin films and methods for their preparation. Background technique [0002] Nanoporous metal materials refer to porous solid materials with significant surface effect, pore diameter between 0.1-100nm, porosity greater than 40%, and high specific surface area. In addition to the basic metal properties of metal materials (high thermal conductivity, high electrical conductivity, corrosion resistance, fatigue resistance, etc.), it also has some properties that dense metal bulk materials do not have, such as: a structure full of nanopores. Its specific gravity is relatively smaller, and its specific surface area is correspondingly increased; the nanoscale metal structure maintains good mechanical properties, which also saves raw materials accordingly. Nanoporous TiO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/02
Inventor 刘涛朱胜利崔振铎杨贤金何茂山
Owner TIANJIN UNIV
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