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Titanium dioxide nanowire and preparation method thereof

A technology of titanium dioxide and nanowires, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of poor bonding force of nanowire film, thick nanowire diameter, complex preparation process, etc., and achieve improved dispersion properties, high specific surface area, and high catalytic activity

Inactive Publication Date: 2015-11-11
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently, the preparation of TiO 2 The nanowire method has the following disadvantages: (1) the TiO obtained by the above method 2 The diameter of the nanowire is relatively thick and the specific surface area is low, which leads to its relatively weak catalytic activity; (2) two-step or multi-pass process, the first grows the nanowire and then undergoes separation, purification, heat treatment and other processes, the preparation process is relatively complicated, The yield is low, the energy consumption is large, and the cost is high; (3) there are substrates and TiO 2 The nanowire film has poor binding force and is easy to fall off.

Method used

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  • Titanium dioxide nanowire and preparation method thereof
  • Titanium dioxide nanowire and preparation method thereof
  • Titanium dioxide nanowire and preparation method thereof

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Embodiment 1

[0044] A preparation method for growing titanium dioxide nanowires in situ, comprising the following steps:

[0045] i) Pipette 50ml 5% TiO 2 Nano Collagen Solution, TiO in Nano Collagen Solution 2 The particle size is 10nm, add polyethylene glycol-4000.1g, dilute to 100ml with distilled water, and ultrasonically disperse for 20 minutes to obtain TiO with a solid content of 2.5%. 2 Nano sol mother liquor, wherein the nano sol mother liquor contains organic matter with a mass fraction of 0.1%;

[0046] ii) The TiO obtained in step i is prepared by wet impregnation 2 The nano-sol mother liquor is coated on the surface of the nanoporous gold film, and the TiO in the nanoporous gold film 2 The load is 4.7%;

[0047] iii) taking out the nanoporous gold film coated with the nano-sol mother liquor from the nano-sol mother liquor with a Ti plate, and air-drying the Ti plate naturally to obtain a nanoparticle-Ti plate loaded with nanoparticles;

[0048] iv) placing the nanoparticl...

Embodiment 2

[0062] A preparation method for growing titanium dioxide nanowires in situ, comprising the following steps:

[0063] i) pipette 50ml0.5%TiO 2 Nano Collagen Solution, TiO in Nano Collagen Solution 2 The particle size is 5nm, add 2g of urea, dilute to 100ml with distilled water, and ultrasonically disperse for 20 minutes to obtain TiO with a solid content of 2.5%. 2 Nano sol mother liquor, wherein the nano sol mother liquor contains organic matter with a mass fraction of 2%;

[0064] ii) The TiO obtained in step i is prepared by wet impregnation 2 The nano-sol mother liquor is coated on the surface of the nanoporous gold film, and the TiO in the nanoporous gold film 2 The loading is 0.4%;

[0065] iii) taking out the nanoporous gold film coated with the nano-sol mother liquor from the nano-sol mother liquor with a Ti plate, and air-drying the Ti plate naturally to obtain a nanoparticle-Ti plate loaded with nanoparticles;

[0066] iv) placing the nanoparticle-Ti plate in ste...

Embodiment 3

[0069] A preparation method for growing titanium dioxide nanowires in situ, comprising the following steps:

[0070] i) Pipette 20ml of 1% TiO 2 Nano Collagen Solution, TiO in Nano Collagen Solution 2 The particle size is 2nm, add 4.5g of citric acid, dilute to 100ml with distilled water, and ultrasonically disperse for 20 minutes to obtain TiO with a solid content of 0.2%. 2 Nano sol mother liquor, wherein the nano sol mother liquor contains 4.5% organic matter by mass fraction;

[0071] ii) The TiO obtained in step i was coated by spin coating method 2 The nano-sol mother liquor is coated on the surface of the nanoporous gold film, and the TiO in the nanoporous gold film 2 The load is 2%;

[0072] iii) taking out the nanoporous gold film coated with the nano-sol mother liquor from the nano-sol mother liquor with a Ti plate, and air-drying the Ti plate naturally to obtain a nanoparticle-Ti plate loaded with nanoparticles;

[0073] iv) placing the nanoparticle-Ti plate in...

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Abstract

The invention provides a preparation method for in-situ growth of a titanium dioxide nanowire on a Ti plate. According to the invention, a nanometer porous gold film is used as a catalyst; nanometer sol particles are used as seeds and enriched on the surface of a porous structure; an organic matter is used as a guiding agent; and the one-dimensional nanowire grows from bottom to top. A TiO2 crystal nucleus is preferential formed at the location of the seeds and then achieves gradual preferred growth under the guiding of the guiding agent. The preparation method is simple, is convenient to operate, and avoids the complicated procedures of necessary filtering, drying and heat treatment before obtainment of the titanium dioxide nanowire in a hydrothermal method, which enables the problem of agglomeration in filtering and heat treatment to be overcome and dispersibility of the titanium dioxide nanowire to be improved, thereby further improving the specific surface area and catalytic activity of the titanium dioxide nanowire.

Description

technical field [0001] The invention relates to a preparation method for growing titanium dioxide nanowires in situ. Background technique [0002] Nano-titanium dioxide is a new type of high-performance material developed in recent years, which is widely used in chemical industry, environment, energy and other fields. At present, the most widely used TiO 2 Most of them exist in the form of powder or thin film, but it is difficult to separate and recover the powder catalyst, while the thin film TiO 2 The photocatalyst has a low specific surface area. Therefore, people hope to develop TiO with controllable structure, large specific surface area and high efficiency. 2 Material. Therefore, one-dimensional ordered TiO 2 Nanowire arrays have excellent physical and chemical properties such as controllable structure, large specific surface area, and high carrier transfer efficiency, and show broad application prospects in the fields of photocatalysis and new energy. [0003] C...

Claims

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Application Information

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IPC IPC(8): C01G23/053B01J21/06
Inventor 陈爱英卜钰丘益达
Owner UNIV OF SHANGHAI FOR SCI & TECH
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