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Octahedron anatase TiO2 orderly superstructure as well as preparation and application thereof

A super structure, anatase technology, applied in titanium dioxide, semiconductor devices, titanium oxide/hydroxide, etc., can solve the problems of low photoelectric hydrogen production efficiency, no octahedral anatase ordered super structure, etc. Achieve the effect of low cost, simple operation and high purity

Inactive Publication Date: 2014-04-30
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, currently commonly used TiO 2 Nanoparticles, such as P25, still have low photoelectric hydrogen production efficiency, so the development of new nanostructured TiO with higher photoelectric conversion efficiency 2 Photoanode materials are of great significance
There is no octahedral anatase TiO 2 Preparation of ordered superstructures and related patent reports as photoanode materials for photoelectrochemical cells

Method used

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  • Octahedron anatase TiO2 orderly superstructure as well as preparation and application thereof
  • Octahedron anatase TiO2 orderly superstructure as well as preparation and application thereof

Examples

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Effect test

Embodiment 1

[0013] Mix 0.5 g of titanium dioxide powder and 40 ml of potassium hydroxide solution with a concentration of 10 mol / L, and react at 160°C for 24 hours. After the reactant is washed with 0.2 mol / L of dilute acetic acid, 0.1 g is dispersed in 20 mL of 95 wt.% acetic acid solution , placed in a stainless steel reactor at 170 ° C for 2 days, and then centrifuged and dried to obtain the octahedral anatase TiO 2 Ordered superstructure.

Embodiment 2

[0015] Mix 1.5 grams of titanium dioxide powder and 50 ml of potassium hydroxide solution with a concentration of 20 mol / L, and react at 200°C for 80 h. After the reactant is washed with 0.2 mol / L of dilute acetic acid, 0.5 g is dispersed in 60 mL of 95wt.% acetic acid solution, put it into a stainless steel reactor at 200 ° C for 4 days, and then centrifuge and dry to obtain the octahedral anatase TiO 2 Ordered superstructure.

Embodiment 3

[0017] Mix 1.0 g of titanium dioxide powder and 45 ml of potassium hydroxide solution with a concentration of 15 mol / L, react at 180 °C for 50 h, wash the reactant with 0.2 mol / L of dilute acetic acid, take 0.3 g and disperse it in 40 mL of 95 wt.% acetic acid solution Put it into a stainless steel reactor and react at 185°C for 3 days, then centrifuge and dry to obtain the octahedral anatase TiO 2 Ordered superstructure.

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Abstract

The invention discloses an octahedron anatase TiO2 orderly superstructure as well as a preparation and an application of the superstructure. The octahedron anatase TiO2 orderly superstructure is synthesized by using a simple solvothermal method, wherein the purity of the superstructure is greater than 90%, the superstructure consists of nano crystals of 10-13nm and the overall particle size of the superstructure is 40-60nm. When the octahedron anatase TiO2 orderly superstructure is used as an anode material of a photoelectrochemistry battery, the result shows that under identical testing conditions, the largest light current and photoelectric conversion efficiency of the superstructure are more than 3 times of that of commercial P25 (Degussa company). The superstructure is simple in method, convenient to operate, low in cost, high in purity, and can be synthesized in large scales.

Description

technical field [0001] The invention belongs to the field of photoelectrochemical cell photoanode material preparation, in particular to an octahedral anatase TiO 2 Ordered superstructures and their preparation and applications. Background technique [0002] The research and development of hydrogen energy has become a strategic decision for sustainable energy development of governments around the world. Hydrogen production by solar photoelectrochemical (PEC) cells is an efficient hydrogen production technology and has attracted much attention in recent years. Semiconductor photoanode materials are the core technology of PEC cells and the key to determining their photoelectric performance. Studies have shown that TiO 2 It has become one of the most promising photoanode materials for PEC cells due to its excellent anti-photocorrosion properties, low cost, and non-toxicity. However, currently commonly used TiO 2 Nanoparticles, such as P25, still have low photoelectric hydr...

Claims

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Application Information

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IPC IPC(8): C01G23/047B82Y30/00B82Y40/00H01L31/0224
Inventor 洪振生黄志高
Owner FUJIAN NORMAL UNIV
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