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Three-dimensional dendritic structure TiO2 array preparation method

A three-dimensional dendritic and array technology, applied in the direction of titanium oxide/hydroxide, titanium dioxide, etc., can solve the problems of unfavorable photogenerated charge transport, poor incident light capture ability, and insufficient contact, etc., to achieve high light absorption and photogenerated charge transmission efficiency , low cost, and the effect of reducing contact resistance

Inactive Publication Date: 2016-05-04
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to excessive interfaces and defects, nanoparticle films and porous films are easy to capture photogenerated charges, which is not conducive to the transmission of photogenerated charges; the specific surface area of ​​nanorod or nanotube arrays is relatively small, and the ability to capture incident light is relatively poor
[0004] The Chinese patent with the publication number CN104310794A discloses a porous TiO with a three-dimensional nanorod flower structure 2 Nanocrystalline film, preparation method and application, prepared porous TiO 2 Nanocrystalline film is a double-layer structure of nanorods and nanoflowers, which can increase light scattering and improve the absorption of incident light, but the direct contact between nanoflowers and nanorods is not close enough, which is not conducive to the transmission of photogenerated charges.

Method used

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  • Three-dimensional dendritic structure TiO2 array preparation method
  • Three-dimensional dendritic structure TiO2 array preparation method
  • Three-dimensional dendritic structure TiO2 array preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Mix 24mL deionized water and 24mL concentrated hydrochloric acid with a mass concentration of 37% evenly, then add 0.8mL tetrabutyl titanate, stir until the solution is clear to obtain a precursor solution, and transfer the obtained precursor solution to a hydrothermal Put the clean conductive glass in the reaction kettle, then hydrothermally react at 150°C for 10h, cool down to room temperature naturally, take out the sample, rinse it and dry it, then put it in a muffle furnace and calcinate at 450°C for 30min to improve the crystallization Tetragonal TiO 2 nanorod arrays;

[0018] (2) Mix 10 mL of deionized water and 100 μL of concentrated hydrochloric acid with a mass concentration of 37% and add 50 μL of titanium trichloride. After mixing evenly, transfer to a hydrothermal reaction kettle. Put the pre-synthesized tetragonal TiO 2 The nanorod arrays were placed in a hydrothermal reactor at 80°C for 15 minutes, cooled naturally to room temperature, the samples we...

Embodiment 2

[0021] (1) Mix 24mL deionized water and 24mL concentrated hydrochloric acid with a mass concentration of 37% evenly, then add 0.8mL tetrabutyl titanate, stir until the solution is clear to obtain a precursor solution, and transfer the obtained precursor solution to a hydrothermal Put clean conductive glass in the reaction kettle, then react with water at 150°C for 20h, cool down to room temperature naturally, take out the sample, rinse it and dry it, then put it in a muffle furnace and calcinate at 450°C for 30min to improve crystallization Tetragonal TiO 2 nanorod arrays;

[0022] (2) Mix 10mL deionized water and 100μL concentrated hydrochloric acid with a mass concentration of 37% evenly, then add 100μL titanium trichloride, mix evenly, transfer to a hydrothermal reaction kettle, and put the pre-synthesized tetragonal TiO 2 The nanorod arrays were placed in a hydrothermal reactor at 80°C for 60 minutes, cooled naturally to room temperature, the samples were taken out, rinse...

Embodiment 3

[0024] (1) Mix 24mL deionized water and 24mL concentrated hydrochloric acid with a mass concentration of 37% evenly, then add 0.8mL tetrabutyl titanate, stir until the solution is clear to obtain a precursor solution, and transfer the obtained precursor solution to a hydrothermal Put clean conductive glass in the reaction kettle, then react with water at 150°C for 15 hours, cool down to room temperature naturally, take out the sample, rinse it and dry it, then put it in a muffle furnace and calcinate at 450°C for 30 minutes to improve crystallization Tetragonal TiO 2 nanorod arrays;

[0025] (2) Mix 10 mL of deionized water and 100 μL of concentrated hydrochloric acid with a mass concentration of 37% evenly, then add 75 μL of titanium trichloride, mix evenly, transfer to a hydrothermal reaction kettle, and put the pre-synthesized tetragonal TiO 2 The nanorod arrays were placed in a hydrothermal reactor at 120°C for 60 minutes, cooled naturally to room temperature, the samples...

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Abstract

The present invention discloses a three-dimensional dendritic structure TiO2 array preparation method, the specific steps are as follows: (1) hydrolysis of tetrabutyl titanate as a titanium source under acidic conditions, and use of conductive glass as a substrate for hydrothermal reaction to obtain a quartet TiO2 nanorod array; and (2) use of the quartet TiO2 nanorod array as a substrate for secondary hydrothermal reaction to obtain a three-dimensional dendritic structure TiO2 array by use of titanium trichloride as a source of titanium. The resulting three-dimensional dendritic structure TiO2 array has a large specific surface area and collimated electron transport channel, helps capture of incident light and transmission of photogenerated charges, and can be used as a light anode material for solar cells and photoelectrochemical decomposition of water.

Description

technical field [0001] The invention belongs to the technical field of synthesis of micro-nano materials, in particular to a three-dimensional dendritic structure TiO 2 Array preparation method. Background technique [0002] With the development of modern industry, the consumption of fossil fuels is increasing, which has brought varying degrees of damage to the earth and the environment. With the depletion of fossil fuels and the requirement for environmental protection, the demand for clean energy is becoming more and more urgent. Solar cells using solar energy and photoelectrochemical water splitting to produce hydrogen are currently the most active research fields. Since 1972, Japanese scholars Fujishima and Honda adopted single crystal n-TiO 2 The success of solar photocatalytic water splitting to produce hydrogen uncovered the TiO 2 As a prelude to the photoanode for photoelectrochemical splitting of water. TiO 2 As a photoanode material for photoelectrochemical w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053
CPCC01G23/053C01P2002/72C01P2004/30C01P2004/61
Inventor 徐芳白丹丹陈会敏梅晶晶蒋凯高志勇武大鹏
Owner HENAN NORMAL UNIV
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