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Preparation method and array of titanium dioxide nanorod array with branched structure on top

A nanorod array and titanium dioxide technology, applied in the field of nanomaterials, can solve the problems of limited nanorod distance in branch structure, inability to use nanorods, poor chemical stability, etc., and achieve the effects of easy promotion, low cost and low raw material cost

Active Publication Date: 2019-05-21
襄阳市大学科技园发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the branched structure prepared by this method is limited by the distance between nanorods, which cannot be applied to arrays with high nanorod density.
At the same time, the titanium source used in this method is titanium trichloride, which has poor chemical stability and is easy to decompose. It is necessary to control the reaction conditions, the operation is difficult, and the repetition rate is low.

Method used

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  • Preparation method and array of titanium dioxide nanorod array with branched structure on top
  • Preparation method and array of titanium dioxide nanorod array with branched structure on top
  • Preparation method and array of titanium dioxide nanorod array with branched structure on top

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preparation example Construction

[0021] A method for preparing a titanium dioxide nanorod array with a branched structure on the top, comprising: sputtering metal titanium nanoparticles on the top of the titanium dioxide nanorod array grown on a conductive substrate, and sintering for the first time to obtain a composite array; Place in the hydrochloric acid solution of tetrabutyl titanate, hydrothermally react at 130-180°C for 2-5 hours, and sinter for the second time. The concentration of tetrabutyl titanate in the hydrochloric acid solution of tetrabutyl titanate is 0.005-0.02mol / L.

[0022] The conductive substrate is preferably FTO conductive glass or ITO conductive glass, which has the advantages of good transparency to visible light, large ultraviolet absorption coefficient, low resistivity, stable chemical properties, and strong acid and alkali resistance at room temperature, making titanium dioxide nanorods The array has good basic photoelectric performance.

[0023] Further, the titania nanorods o...

Embodiment 1

[0042] TiO grown on FTO conductive glass 2 The nanorod array is used as the substrate, and the DC magnetron sputtering method is used, and the sputtering vacuum background is 6×10 -6 Torr, the sputtering pressure is 8mTorr, the sputtering power is 100W, the target base distance is 20cm, and the conductive substrate rotation speed is 6r / min at room temperature. 2 The sputtering time of nanoparticles deposited on the surface of the nanorod array was 60min, and the match-like TiO was prepared 2 Composite arrays of nanoparticles and nanorods. After sputtering, it was annealed in air at 450° C. for 60 minutes to obtain a composite array.

[0043] Measure 12.5ml of deionized water and 12.5ml of 36%-38%wt hydrochloric acid, mix and stir for 5 minutes, add tetrabutyl titanate to prepare a reaction solution with a concentration of 0.015mol / L of tetrabutyl titanate, Stirring was continued for 5 min to obtain a precursor solution. Put the composite array into the inner lining of the ...

Embodiment 2

[0045] TiO grown on FTO conductive glass 2 The nanorod array is used as the substrate, and the DC magnetron sputtering method is used, and the sputtering vacuum background is 6×10 -6 Torr, the sputtering pressure is 12mTorr, the sputtering power is 120W, the target base distance is 20cm, and the conductive substrate rotation speed is 6r / min at room temperature. 2 The sputtering time of nanoparticles deposited on the surface of the nanorod array was 60min, and the match-like TiO was prepared 2 Composite arrays of nanoparticles and nanorods. After sputtering, it was annealed in air at 450° C. for 60 minutes to obtain a composite array.

[0046] Measure 12.5ml of deionized water and 12.5ml of 36%-38%wt hydrochloric acid, mix and stir for 5 minutes, add tetrabutyl titanate to prepare a reaction solution with a concentration of 0.02mol / L of tetrabutyl titanate , continue stirring for 5 min to obtain a precursor solution. Put the composite array into the inner lining of the reac...

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Abstract

The invention relates to a titanium dioxide nanorod array with a branched structure on the top and a preparation method of the titanium dioxide nanorod array and belongs to the field of nano-materials. The preparation method comprises the following steps: sputtering metal titanium nano-particles to the top of a titanium dioxide nanorod array growing on a conductive substrate, and carrying out primary sintering, so as to obtain a composite array; and putting the composite array into a hydrochloric acid solution containing tetrabutyl titanate, carrying out hydrothermal reaction at 130-180 DEG C for 2-5 hours, and carrying out secondary sintering, wherein the concentration of tetrabutyl titanate in the hydrochloric acid solution containing tetrabutyl titanate is 0.005mol / L-0.02mol / L. The preparation method is simple in operation, good in controllability, high in repetitive rate, short in preparation period, mild in reaction conditions, low in raw material cost, stable in chemical property, environment-friendly and easy for industrial large-scale production. The array is prepared by virtue of the preparation method and is large in specific surface area, strong in light scattering capacity and stable in structure.

Description

technical field [0001] The invention relates to the field of nanomaterials, in particular to a method for preparing a titanium dioxide nanorod array with a branched structure at the top and the array. Background technique [0002] Titanium dioxide (TiO 2 ) materials have excellent photoelectric properties, good environmental compatibility, and low cost, and have important applications in the fields of photocatalysis, photoelectric conversion, and biosensing. In recent years, TiO with a one-dimensional single-crystal nanorod array structure 2 Nanomaterials have received widespread attention, and their one-dimensional single-crystal structures can provide direct channels for photogenerated electron transport, reduce recombination probability, and improve electron transport efficiency, thereby enhancing the optoelectronic properties of materials. However, for TiO 2 As far as the nanorod array structure is concerned, there are defects such as small specific surface area and w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053C01G23/08B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G23/053C01G23/08C01P2004/03C01P2004/16C01P2006/12C01P2006/40C01P2006/60
Inventor 汪竞阳王贤涛严珺谈琪梁桂杰李望南钟志成王松屈少华
Owner 襄阳市大学科技园发展有限公司
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