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Method for preparing density-adjustable TiO2 nanorod array

A nanorod array and nanorod technology, which is applied in the field of preparation of TiO2 nanorod arrays, can solve the problem that the density of nanorod arrays has not been fully controllable, and achieve controllable photocatalytic performance, photoelectric performance, and preparation methods. simple and easy effects

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

AI Technical Summary

Problems solved by technology

Existing preparation of TiO on the substrate induced by the seed layer 2 In the nanorod array technology, the density of the nanorod array has not been fully controllable

Method used

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  • Method for preparing density-adjustable TiO2 nanorod array

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example 1

[0015] 1) Dissolve tetra-n-butyl titanate, water and acetylacetone at a molar ratio of 1:1:0.3 in ethanol, then add polyvinylpyrrolidone to form a titanium concentration of 0.1mol / L and a polyvinylpyrrolidone concentration of 30mg / L Titanium dioxide precursor sol;

[0016] 2) Spin-coat the titanium dioxide precursor sol onto the glass substrate at a speed of 6000rpm at 20°C for 35s to form a titanium dioxide precursor nano-dot array sol film on the substrate, and then put the glass substrate into the muffle Heat treatment in a furnace at 100°C;

[0017] 3) Add 0.005M tetrabutyl titanate into 0.5M hydrochloric acid solution, stir until a stable solution is formed, and transfer to a 100mL hydrothermal kettle. The heat-treated glass substrate is placed in a hydrothermal kettle obliquely. The hydrothermal temperature is 80°C, and the hydrothermal time is 2h. The present invention obtains TiO on the glass substrate 2 Nanorod array structure, the diameter of nanorods is 10nm, an...

example 2

[0019] 1) Dissolve tetra-n-butyl titanate, water and acetylacetone at a molar ratio of 1:1.1:0.4 in ethanol, then add polyvinylpyrrolidone to form a titanium concentration of 0.2mol / L and a polyvinylpyrrolidone concentration of 40mg / L Titanium dioxide precursor sol;

[0020] 2) The titania precursor sol was spin-coated onto the ITO substrate at a speed of 6500rpm at 15°C for 30s to form a titania precursor nano-dot array sol film on the ITO substrate, and then put the substrate into the muffle Heat treatment at 400°C in a furnace;

[0021] 3) Add 0.01M titanium tetrachloride to 0.9M nitric acid solution, stir until a stable solution is formed, and transfer to a 100mL hydrothermal kettle. After heat treatment, the substrate is placed in a hydrothermal kettle obliquely. The hydrothermal temperature is 110°C, and the hydrothermal time is 1.5h. The present invention obtains TiO on the ITO substrate 2 Nanorod array structure, the diameter of nanorods is 42nm, and the density is...

example 3

[0023] 1) Dissolve tetra-n-butyl titanate, water and acetylacetone at a molar ratio of 1:1.2:0.35 in ethanol, then add polyvinylpyrrolidone to form a titanium concentration of 0.3mol / L and a polyvinylpyrrolidone concentration of 60mg / L Titanium dioxide precursor sol;

[0024] 2) The titania precursor sol was spin-coated onto the silicon substrate at a speed of 7000rpm at 10°C for 40s to form a titania precursor nanodot array sol film on the silicon substrate, and then the FTO substrate was placed in the Heat treatment at 600°C in a Furnace;

[0025] 3) Add 0.02M titanium sulfate to 1.3M hydrochloric acid solution, stir until a stable solution is formed, and transfer to a 100mL hydrothermal kettle. After the heat treatment, the FTO substrate was placed in a hydrothermal kettle obliquely. The hydrothermal temperature is 140°C, and the hydrothermal time is 0.5h. The present invention obtains TiO on the silicon substrate 2 Nanorod array structure, the diameter of nanorods is 8...

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Abstract

The invention discloses a method for preparing a density-adjustable TiO2 nanorod array. The diameter of TiO2 nanorods is 10-200 nm, and the density distribution range of the TiO2 nanorods is 9.4*10<2> / cm<-2> to 8.3*10<13> / m<-2>. The preparation method comprises the following steps of: (1) dissolving tetrabutyl titanate, water and acetylacetone into alcohol, and adding polyvinylpyrrolidone to form titanium dioxide precursor sol; (2) quickly spin-coating the titanium dioxide precursor sol on a substrate to form a titanium dioxide precursor nano lattice array sol film on the substrate, and putting the substrate into a muffle furnace for thermal treatment; and (3) putting the thermally treated substrate into a titanate and acid mixed water solution for hydro-thermal treatment to obtain the TiO2 nanorod array on the substrate. The preparation method is simple, and the surface wettability, the photocatalytic property and the photoelectric properties of the prepared TiO2 nanorod array can be controlled according to different diameters and densities.

Description

technical field [0001] The present invention relates to a kind of TiO 2 Preparation methods of nanorod arrays. Background technique [0002] Nano-TiO 2 The chemical performance is stable, and its unique optical catalytic performance and photoelectric performance make it have broad application prospects in the fields of catalysts, ultraviolet ray absorbers, and photosensitive dye cells. Its unique hydrophobicity and superhydrophilicity make it have unique applications in the field of biomedical materials such as the manufacture of self-cleaning surfaces and texture reconstruction. Nano TiO 2 Preparation on the substrate can realize its photochemical deviceization. TiO 2 Among the three crystal forms, rutile is difficult to prepare under low-temperature hydrothermal conditions. Related studies have reported the hydrothermal preparation of rutile nanorod arrays on glass conductive substrates (Bin Liu, et al.Jumal of the American Chemical Society2009, 131, ( 11), 3985-3990...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82B3/00
Inventor 翁文剑汤丹程逵宋晨路沈鸽徐刚赵高凌张溪文杜丕一韩高荣
Owner ZHEJIANG UNIV
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