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Preparation method of high specific surface area ultralong TiO2 nanotube

A high specific surface area, nanotube technology, applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, can solve the problems of difficult separation of titanium dioxide and medium, low catalytic efficiency of titanium dioxide, small specific surface area, etc. Achieve the effect of high controllability, good separation and simple operation

Inactive Publication Date: 2016-01-27
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the invention: The present invention provides a mesoporous anatase TiO with high specific surface area and large pore volume 2 Nanotube preparation method, to solve the problems in the prior art due to the fine particles of titanium dioxide powder, TiO 2 The specific surface area is small and the pore volume is small, resulting in low catalytic efficiency of titanium dioxide; and after the catalytic reaction is over, it is difficult to separate titanium dioxide from the medium

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  • Preparation method of high specific surface area ultralong TiO2 nanotube
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  • Preparation method of high specific surface area ultralong TiO2 nanotube

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Embodiment 1

[0031] A mesoporous anatase TiO with high specific surface area and large pore volume 2 The nanotube preparation method includes the following steps:

[0032] Step 1. Titanium dioxide and alkali reaction: accurately weigh 2.7g of titanium dioxide powder, put it into 300ml of 8mol / L sodium hydroxide solution, ultrasonically stir for 2 hours, then magnetically stir for 5 hours, so that the titanium dioxide is fully dissolved in the sodium hydroxide solution in;

[0033] Step 2. Transfer the solution obtained in step 1 into a 150ml polytetrafluoroethylene reactor. The height-to-diameter ratio of the reactor is 3 and the filling factor of the reactor is 0.75. The reactor is placed in a stainless steel jacket and the reactor is assembled. OK, put it in an oil bath with heat transfer oil, start the magnetic heating stirrer, maintain the speed at 400rpm, heat it to 130°C, keep it warm for 28 hours;

[0034] Step 3. After the reaction of step 2 is over, turn off the stirring and heating sys...

Embodiment 2

[0041] A mesoporous anatase TiO with high specific surface area and large pore volume 2 The nanotube preparation method includes the following steps:

[0042] Step 1. Titanium dioxide and alkali reaction: accurately weigh 2.7g of titanium dioxide powder, put it into 300ml of 9mol / L sodium hydroxide solution, ultrasonically stir for 3 hours, and then magnetically stir for 4 hours to fully dissolve the titanium dioxide in the alkaline solution ,

[0043] Step 2. Transfer the solution obtained in step 1 into a 150ml polytetrafluoroethylene reactor. The height-to-diameter ratio of the reactor is 3 and the filling factor of the reactor is 0.75. The reactor is placed in a stainless steel jacket and the reactor is assembled. Good, put it in an oil bath with heat transfer oil, start the magnetic heating stirrer, maintain the speed at 500rpm, heat it to 133°C, and keep it warm for 25 hours.

[0044] Step 3. After the reaction in Step 2, turn off the stirring and heating system, cool to room ...

Embodiment 3

[0052] A mesoporous anatase TiO with high specific surface area and large pore volume 2 The nanotube preparation method includes the following steps:

[0053] Step 1. Titanium dioxide and alkali reaction: accurately weigh 2.7g of titanium dioxide powder, put it into 300ml, 10mol / L sodium hydroxide solution, ultrasonically stir for 4 hours, then magnetically stir for 3 hours, so that the titanium dioxide is fully dissolved in the alkali In solution

[0054] Step 2. Transfer the solution obtained in step 1 into a 150ml polytetrafluoroethylene reactor. The height-to-diameter ratio of the reactor is 3, and the filling factor of the reactor is 0.75. Put the reactor into a stainless steel jacket and assemble the reactor. OK, put it in the oil bath with heat transfer oil, start the magnetic heating stirrer, maintain the speed at 600rpm, heat to 135°C, keep the temperature for 20 hours;

[0055] Step 3. After the reaction in Step 2, turn off the stirring and heating system, cool to room tem...

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Abstract

The invention provides a preparation method of a high specific surface area ultralong TiO2 nanotube. The method includes: fully dissolving titanium dioxide powder in a sodium hydroxide solution; transferring the solution into a reaction kettle; conducting magnetic heating stirring, heat preservation and cooling to room temperature, and then transferring the reaction mother liquor; centrifuging the mother liquor, reserving the centrifuged filter cake to obtain a crude product; washing he crude product with clear water weak acid in batches by several times, and adjusting pH; subjecting the washed solution to pumping filtration so as to obtain a TiO2 nanotube finished product; calcining the TiO2 nanotube finished product, and performing cooling to room temperature so as to obtain the anatase type TiO2 nanotube. The preparation method provided by the invention has the characteristics of simple operation and high controllability, and has no production of pollutants in the whole preparation process, thus being convenient for industrial popularization and application. According to the invention, the pore structure of TiO2 is improved to enhance its specific surface area and pore volume, thereby significantly improving its catalytic ability, and at the same time realizes good separation of the catalyst from the medium. The anatase type TiO2 nanotube can be applied to degradation treatment of solar cells and persistent toxic and harmful organics.

Description

Technical field [0001] The invention belongs to the field of chemical industry, and particularly relates to a mesoporous anatase TiO with high specific surface area and large pore volume 2 Nanotube preparation method. Background technique [0002] Titanium dioxide has attracted the interest of many experts in the field of catalysis due to its thermal stability and non-toxicity to animals and plants. However, the commercialized German-made titanium dioxide P-25 has a specific surface area of ​​only 50-60m. 2 / g, the pore volume is only about 0.1cm 3 / g, this greatly affects its catalytic efficiency, resulting in that titanium dioxide is rarely used in the practical application of photocatalysis. In the past 5 years, domestic and foreign experts have adopted sulfur or other element doping methods to modify its structure , So that the modified titanium dioxide, the photoresponse area required for the catalytic reaction, extends from the ultraviolet wavelength region (wavelength less ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047B82Y30/00
Inventor 马杰陈晓燕
Owner TONGJI UNIV