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Amorphous titanium dioxide nano dot array and preparation method thereof

A technology of nano-dot array and titanium dioxide, which is applied in the direction of nanostructure manufacturing, nanotechnology, nanotechnology, etc., can solve the problem of high preparation temperature, and achieve the effects of simple operation, reduced diameter and increased density

Inactive Publication Date: 2011-02-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the titanium dioxide prepared by the above method is crystalline, and the preparation temperature is high

Method used

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  • Amorphous titanium dioxide nano dot array and preparation method thereof

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example 1

[0016] 1) Polish and clean the surface of the silicon substrate to remove surface impurities;

[0017] 2) Dissolve tetrabutyl titanate, water and acetylacetone in 10ml methanol at a molar ratio of 1:1:0.3, then add 0.6g polyvinylpyrrolidone to form a titanium concentration of 0.1mol / L and a polyvinylpyrrolidone concentration of 60g / L of titanium dioxide precursor sol;

[0018] 3) The titania precursor sol was spin-coated on the silicon substrate at a speed of 7000 rpm at 5°C, and the spin coating time was 40s. The titania precursor nanodot array sol film was formed on the silicon substrate, and then the temperature was 5~℃, 10 Place for 6h under the condition of% humidity for aging;

[0019] 4) Put the aged sample into a mixed solution of water and ethanol, the volume content of water in the mixed solution is 4%, and hydrothermal treatment at 140° C. for 1 h to obtain an amorphous titanium dioxide nano-dot array on a silicon substrate.

[0020] The diameter of titanium dioxide nano-...

example 2

[0022] 1) Clean the surface of polystyrene substrate to remove surface impurities;

[0023] 2) Dissolve tetrabutyl titanate, water and acetylacetone at a molar ratio of 1:1.2:0.4 in 10ml of butanol, and then add 0.4g of polyvinylpyrrolidone to form a titanium concentration of 0.2mol / L, and the concentration of polyvinylpyrrolidone is 40g / L of titanium dioxide precursor sol;

[0024] 3) The titania precursor sol was spin-coated on the polystyrene substrate at a speed of 6000 rpm at 20°C, and the spin coating time was 40s. The titania precursor nanodot array sol film was formed on the polystyrene substrate. Place for 12h at ℃ and 95% humidity for aging;

[0025] 4) Put the aged sample into water, and hydrothermally heat it at 100°C for 12 hours to obtain a titanium dioxide nanodot array structure on a polystyrene substrate. The diameter of the titanium dioxide nanodots is 20-150nm, and the distribution density of the titanium dioxide nanodots is 4.4×10 10 cm -2 .

example 3

[0027] 1) Polish and clean the surface of the metal titanium substrate to remove surface impurities;

[0028] 2) Dissolve titanium trichloride, water and acetylacetone in 10ml ethanol at a molar ratio of 1:1.1:0.3, then add 0.3g polyvinylpyrrolidone to form a titanium concentration of 0.3mol / L and a polyvinylpyrrolidone concentration of 30g / L titanium dioxide precursor sol;

[0029] 3) The titania precursor sol was spin-coated on the titanium metal substrate at a speed of 8000 rpm at 10°C, and the spin coating time was 30s. The titania precursor nano-dot array sol film was formed on the metal titanium substrate, and then at 10°C, Place for 8 hours under 50% humidity conditions for aging;

[0030] 4) Put the aged sample into water and hydrothermally heat it at 120°C for 2h to obtain a titanium dioxide nanodot array structure on a titanium metal substrate. The diameter of the titanium dioxide nanodots is 60-250nm, and the distribution density of the titanium dioxide nanodots is 1.0 ...

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Abstract

The invention discloses an amorphous titanium dioxide nano dot array. The titanium dioxide of the array has an amorphous structure, the diameter of titanium dioxide nano dots is 10 to 250 nanometers, and the distribution density of the titanium dioxide nano dots is 1.0-10.0*1,010 cm<2>. A preparation method for the amorphous titanium dioxide nano dot array comprises the following steps of: dissolving titanate, water and acetylacetone into alcohol, adding polyvinylpyrrolidone into the mixture to form titanium dioxide precursor sol; and spinning the titanium dioxide precursor sol on a substrateto form a titanium dioxide precursor nano dot array sol film, and obtaining the amorphous titanium dioxide nano dot array on the substrate by ageing and hydrothermal process. The preparation method solves the problem of preparing the amorphous titanium dioxide nano dot array on the surface of the substrate; and the preparation method is simple, feasible and convenient to operate, and can be applied in the fields of surface function modification of non high-temperature resistant materials, photo-catalysis and the like.

Description

Technical field [0001] The invention relates to an amorphous titanium dioxide nano-dot array and a preparation method thereof, which can be used in the fields of material surface function modification, photocatalysis and the like. Background technique [0002] Titanium dioxide is stable and non-toxic. It exists in the form of three minerals in nature, namely anatase, rutile and brookite. Titanium dioxide has a strong absorption of ultraviolet rays. After absorbing ultraviolet rays, electron-hole pairs and oxygen vacancies are formed, and it is easy to adsorb hydroxyl radicals and hydroxyl groups on the surface. The hydroxyl groups can easily adsorb water in the air and increase the hydrophilicity of the material surface. Hydroxyl radicals have strong oxidizing properties and can decompose organic pollutants. Related studies have reported that amorphous titanium dioxide nanopillars have better catalytic performance than crystalline titanium dioxide (Li, Y., et al. Journal of the A...

Claims

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Application Information

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IPC IPC(8): B82B1/00B82B3/00
Inventor 程逵洪逸翁文剑宋晨路杜丕一沈鸽赵高凌张溪文徐刚汪建勋韩高荣
Owner ZHEJIANG UNIV
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