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Preparation method and application of titanium dioxide nanorod array/silver nano composite material

A nanorod array, titanium dioxide technology, applied in the field of nanomaterials, can solve the problems of complex operation, high reaction temperature, large electric energy, etc., and achieve the effects of good repeatability, low reaction temperature and simple operation

Inactive Publication Date: 2019-11-22
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The preparation of titanium dioxide / silver nanocomposites by electrospinning and electroplating has the problems of complex operation, high reaction temperature and large power consumption.

Method used

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  • Preparation method and application of titanium dioxide nanorod array/silver nano composite material
  • Preparation method and application of titanium dioxide nanorod array/silver nano composite material
  • Preparation method and application of titanium dioxide nanorod array/silver nano composite material

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preparation example Construction

[0027] The embodiment of the present invention provides a preparation method of a titanium dioxide nanorod array / silver nanocomposite material, the preparation method comprising:

[0028] Dissolving tetrabutyl titanate in a hydrochloric acid solution to obtain a hydrochloric acid solution of tetrabutyl titanate;

[0029] Put the substrate into the hydrochloric acid solution of tetrabutyl titanate, and conduct a hydrothermal reaction at 140-160°C for 3-10 hours to obtain a titanium dioxide nanorod array. The substrate is fluorine-doped tin dioxide transparent conductive glass (FTO conductive glass);

[0030] putting the titanium dioxide nanorod array into the silver ammonia solution, and standing at room temperature for 4-6 hours to obtain the mixture;

[0031] The ethanol solution of polyvinylpyrrolidone is added into the mixture, and reacted at 60-80° C. for 2-4 hours to obtain titanium dioxide nanorod array / silver nanocomposite material.

[0032] Specifically, the preparati...

Embodiment 1

[0042] The embodiment of the present invention provides a preparation method of a titanium dioxide nanorod array / silver nanocomposite material, the preparation method comprising:

[0043] Mix concentrated hydrochloric acid and deionized water at a volume ratio of 1:1 to obtain a hydrochloric acid solution. Measure 0.8 mL of tetrabutyl titanate with a pipette, and dissolve tetrabutyl titanate in 60 mL of hydrochloric acid solution, and stir for 20 minutes by magnetic force , making the tetrabutyl titanate rapidly dissolve in the hydrochloric acid solution to obtain the hydrochloric acid solution of the tetrabutyl titanate;

[0044] The substrate was put into the hydrochloric acid solution of tetrabutyl titanate, and hydrothermally reacted at 150°C for 5 hours to obtain a titanium dioxide nanorod array. The substrate was fluorine-doped tin dioxide transparent conductive glass; the prepared titanium dioxide nanorods Rod arrays were characterized as figure 1 Field emission SEM mi...

Embodiment 2

[0052] The embodiment of the present invention provides a preparation method of a titanium dioxide nanorod array / silver nanocomposite material, the preparation method comprising:

[0053] Mix concentrated hydrochloric acid and deionized water at a volume ratio of 1:1 to obtain a hydrochloric acid solution. Measure 0.8 mL of tetrabutyl titanate with a pipette and dissolve tetrabutyl titanate in 60 mL of hydrochloric acid solution. Stir for 15 minutes by magnetic force , making the tetrabutyl titanate rapidly dissolve in the hydrochloric acid solution to obtain the hydrochloric acid solution of the tetrabutyl titanate;

[0054] Put the substrate into the hydrochloric acid solution of tetrabutyl titanate, and conduct a hydrothermal reaction at 140°C for 3 hours to obtain a titanium dioxide nanorod array, and the substrate is tin dioxide-doped transparent conductive glass with fluorine;

[0055] Dissolve silver nitrate and ammonia water in absolute ethanol respectively, and obtain...

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Abstract

The invention discloses a preparation method and application of a titanium dioxide nanorod array / silver nano composite material, and belongs to the field of nano materials. The preparation method comprises the following steps of: dissolving tetrabutyl titanate in a hydrochloric acid solution to obtain a hydrochloric acid solution of tetrabutyl titanate; putting a substrate into a hydrochloric acidsolution of tetrabutyl titanate, and performing hydrothermal reaction at a temperature of 140-160 DEG C for 3-10 hours to obtain a titanium dioxide nanorod array, the substrate being fluorine-doped stannic oxide transparent conductive glass; putting the titanium dioxide nanorod array into a silver-ammonia solution, and performing standing for 4-6 hours at a room temperature to obtain a mixture; and adding an ethanol solution of polyvinylpyrrolidone into the mixture, and reacting at a temperature of 60-80 DEG C for 2-4 hours to obtain the titanium dioxide nanorod array / silver nano composite material. According to the preparation method, a hydrothermal method and a chemical oxidation method are combined, so that the operation is simpler, the reaction temperature is low, and the preparationmethod is more energy-saving. The titanium dioxide nanorod array / silver nano composite material obtained by adopting the preparation method has the good SERS activity.

Description

technical field [0001] The invention relates to the field of nanomaterials, in particular to a preparation method and application of a titanium dioxide nanorod array / silver nanocomposite material. Background technique [0002] Surface Enhanced Raman Scattering (SERS) technology can detect molecular level information of substances adsorbed on SERS active substrates. Therefore, SERS technology is widely used in ultrasensitive chemical detection and biological detection. Noble metals such as silver and gold have good SERS activity due to the localized plasmons on their surface. However, when noble metals are used as SERS active substrates, there are disadvantages such as high cost and difficulty in recycling. Therefore, low-cost and reusable titanium dioxide nanorod arrays / silver nanocomposites have good application prospects in the field of SERS. [0003] At present, the operation of preparing this titanium dioxide / silver nanocomposite material is relatively complicated. For ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65C01G23/053B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G23/053C01P2004/03C01P2004/16C01P2004/62G01N21/658
Inventor 陈韶云刘奔胡成龙
Owner JIANGHAN UNIVERSITY
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