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Preparation method of TiO2 nanotubes modified by silver nanoparticles with different particle diameters

A technology of silver nanoparticles and nanotubes, applied in the field of nanomaterials, can solve problems such as unfavorable industrialization, complexity, and cumbersome nanotube process, and achieve the effects of clean raw materials, high output, and simple process

Inactive Publication Date: 2012-06-27
南京鼎科纳米技术研究所有限公司
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Problems solved by technology

[0004] The present invention is mainly aimed at the present preparation of silver nanoparticles modified TiO 2 The process of nanotubes is cumbersome and complicated, the particle size of silver particles is single, and the performance of composite materials cannot be adjusted, which is not conducive to the characteristics of industrialization. It provides a clean and safe preparation of silver nanoparticles with different particle sizes to modify TiO. 2 nanotube method

Method used

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  • Preparation method of TiO2 nanotubes modified by silver nanoparticles with different particle diameters
  • Preparation method of TiO2 nanotubes modified by silver nanoparticles with different particle diameters
  • Preparation method of TiO2 nanotubes modified by silver nanoparticles with different particle diameters

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preparation example Construction

[0027] see figure 1 As shown, the present invention provides a kind of silver nanoparticles modified TiO with different particle sizes 2 A method for preparing nanotubes, comprising the steps of:

[0028] Step 1: Add TiO 2 Spherical particles were ultrasonically dispersed in aqueous sodium hydroxide solution, the TiO 2 The weight of spherical particles is 0.15-2.0g;

[0029] Step 2: Add TiO 2 The sodium hydroxide solution is warmed up to 150 degrees and reacts naturally after 24 hours;

[0030] Step 3: The cooled TiO 2 The sodium hydroxide solution was centrifuged, and the precipitate was washed with deionized water until neutral;

[0031] Step 4: Then precipitate the wash to neutral TiO 2 Disperse in 0.1mol / L nitric acid solution, centrifuge after magnetic stirring, and wash the precipitate with deionized water again until neutral to obtain TiO 2 nanotube;

[0032] Step 5: The prepared TiO 2 The nanotubes are dispersed in an organic solvent, adding a macromolecular ...

Embodiment

[0038] The following is an example of preparing silver nanoparticles modified titanium dioxide nanotubes with different sizes by the method provided by the present invention.

[0039] TiO was first prepared by hydrothermal method 2 nanotube. 0.15g of TiO with a diameter of 21nm 2 Ultrasonic dispersion of nanoparticles (kq2200b ultrasonic cleaner, 600w, 25°C) in 0.1mol / L sodium hydroxide (NaOH) aqueous solution. Take 80ml of this aqueous solution, fill it in a stainless steel reaction kettle with a volume of 100ml, heat up to 150°C and react for 24 hours, then naturally cool to room temperature, centrifuge the obtained precipitate at a speed of 6000rpm (rev / min), remove the supernatant clear night, and wash with deionized water Clean the white TiO at the bottom of the centrifuge tube 2 Precipitate to neutrality, then disperse in 0.1mol / L nitric acid solution, centrifuge under magnetic stirring at 300 revolutions per minute (rpm) for 1 hour, and wash the precipitate with deio...

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Abstract

The invention relates to a preparation method of TiO2 nanotubes modified by silver nanoparticles with different particle diameters, comprising the following steps of: ultrasonically dispersing spherical TiO2 particles into a sodium hydroxide water solution; increasing the temperature of the sodium hydroxide water solution of TiO2 to 150 DEG C, making the sodium hydroxide water solution react withthe TiO2 for 24 hours, and then naturally cooling; centrifuging the cooled sodium hydroxide water solution of the TiO2; dispersing the TiO2 cleaned and precipitated to be neutral into a salpeter solution of 0.1 mol / L to obtain the TiO2 nanotubes; dispersing the prepared TiO2 nanotubes into an organic solvent; adding an adsorbent to the organic solvent containing the TiO2 nanotubes; dispersing obtained yellowish TiO2 nanotube particles into the organic solvent, and dropwise adding an AgNO3 solution; annealing obtained TiO2 nanotube particles modified by silver quantum dots at different temperature in an inert atmosphere so that the silver quantum dots positioned on the surface of the TiO2 and in the TiO2 grow in a curing way; and cooling to obtain various TiO2 nanotubes modified by the silver nanoparticles with different particle diameters.

Description

technical field [0001] The present invention relates to a preparation method of composite nanomaterials, in particular to a method of depositing titanium dioxide nanotubes on titanium dioxide nanotubes by using ethanol reduction and annealing at different temperatures to obtain silver nanoparticles with different particle sizes to modify titanium dioxide nanotubes. field of nanomaterials. Background technique [0002] Nano-TiO 2 (Titanium dioxide) has attracted extensive attention due to its environmental friendliness, easy availability of raw materials, simple and convenient preparation, and excellent catalytic performance. Among them, TiO 2 Nanotubes have one-dimensional extension in structure, and the transmission of electrons in this direction is continuous. Therefore, compared with zero-dimensional nanoparticles, it not only maintains the quantum effect of nanomaterials, but also has the continuity of charge transport in bulk materials. This excellent property makes ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/16C30B29/62C30B7/10C01G23/047C30B33/00C23C18/42B01J21/06B01J23/50B01J37/02
Inventor 谭付瑞曲胜春王占国
Owner 南京鼎科纳米技术研究所有限公司
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