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Anatase type titanium dioxide nano-fiber photocatalyst and preparation method thereof

A nanofiber and titanium dioxide technology, which is applied in the field of nanomaterials and photocatalysis, can solve the problems of uneven particle size of titanium dioxide, increase the difficulty of process adjustment, and poor control of crystallinity, and achieve uniform particle size and easy control of the preparation process , the effect of small granularity

Inactive Publication Date: 2012-07-18
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are also many literature reports on the preparation of titanium dioxide nanofibers by electrospinning technology. Some of them disperse nano titanium dioxide into polymer solution, but this method often results in uneven distribution of particles.
In some cases, titanium dioxide sol is added to the polymer solution, but the electrospinning method combined with the sol-gel method is used to prepare titanium dioxide nanofibers, and the particle size of titanium dioxide on the nanofibers prepared in this way is not uniform, and the size is relatively large, and the crystallinity is relatively large. It is not easy to control, and the process parameters of sol-gel technology are introduced in the whole preparation process, which increases the factors affecting the final product a lot and increases the difficulty of process adjustment

Method used

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  • Anatase type titanium dioxide nano-fiber photocatalyst and preparation method thereof
  • Anatase type titanium dioxide nano-fiber photocatalyst and preparation method thereof
  • Anatase type titanium dioxide nano-fiber photocatalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh PVP 0.76g, TBT 6.81g (PVP / TBT=1:9); PVP 1.70g, TBT 6.81g (PVP / TBT=2:8); PVP 2.92g, TBT 6.81g (PVP / TBT=3 : 7), and then respectively added to 3 parts of 9.21g absolute ethanol solution, added a magnetic stirrer, adjusted to an appropriate speed, and stirred at room temperature for 4 to 6 hours. The prepared above-mentioned spinning solution is packed into a syringe with a ground stainless steel needle, and the syringe is installed on the electrospinning device. At a spinning voltage of 10kV, the distance between the receiving device and the spinneret is 15cm, and the spinning Under the process condition of liquid flow rate of 0.5mL / h, spinning for 10h, PVP / TBT composite nanofiber membrane was obtained. The obtained composite nanofiber membrane was put into a muffle furnace, heated from room temperature to 400 °C at a heating rate of 0.5 °C / min, calcined for 5 h, and then naturally cooled to room temperature.

Embodiment 2

[0020] Weigh PVP 0.76g, TBT 6.81g (PVP / TBT=1:9); PVP 1.70g, TBT 6.81g (PVP / TBT=2:8); PVP 2.92g, TBT 6.81g (PVP / TBT=3 : 7), and then respectively added to 3 parts of 9.21g absolute ethanol solution, added a magnetic stirrer, adjusted to an appropriate speed, and stirred at room temperature for 4 to 6 hours. The prepared above-mentioned spinning solution is packed into a syringe with a ground stainless steel needle, and the syringe is installed on the electrospinning device. At a spinning voltage of 12kV, the distance between the receiving device and the spinneret is 15cm, and the spinning Under the process condition of liquid flow rate of 1mL / h, spinning for 10h, the PVP / TBT composite nanofiber membrane was obtained. The obtained composite nanofiber membrane was put into a muffle furnace, heated from room temperature to 500 °C at a heating rate of 1 °C / min, calcined for 4 h, and then naturally cooled to room temperature.

Embodiment 3

[0022] Weigh PVP 0.76g, TBT 6.81g (PVP / TBT=1:9); PVP 1.70g, TBT 6.81g (PVP / TBT=2:8); PVP 2.92g, TBT 6.81g (PVP / TBT=3 : 7), and then respectively added to 3 parts of 9.21g absolute ethanol solution, added a magnetic stirrer, adjusted to an appropriate speed, and stirred at room temperature for 4 to 6 hours. The prepared above-mentioned spinning solution is packed into a syringe with a ground stainless steel needle, and the syringe is installed on the electrospinning device. At a spinning voltage of 15kV, the distance between the receiving device and the spinneret is 20cm, and the spinning Under the process condition of liquid flow rate of 0.5mL / h, spinning for 10h, PVP / TBT composite nanofiber membrane was obtained. The obtained composite nanofibrous membrane was put into a muffle furnace, the temperature was raised from room temperature to 500 °C at a rate of 2 °C / min, calcined for 3 h, and then naturally cooled to room temperature.

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Abstract

The invention discloses an anatase type titanium dioxide nano-fiber photocatalyst and a preparation method thereof, and belongs to the technical field of nano materials and photocatalysts. By the method, a composite nano-fiber is prepared by an electrostatic spinning technology, and then is calcinated in the air to obtain the titanium dioxide nano-fiber photocatalyst, but a sol-gel technology is not used in the process, so that process parameters are easy to adjust and control, multiple factors which influence the final crystallization degree, crystal form, granular distribution and size of a titanium dioxide nano-fiber are eliminated, and a catalytic efficient photocatalysis material can be easily obtained. The titanium dioxide nano-fiber prepared by the method has a large specific surface area, so that visible light is high in catalytic efficiency. The preparation method has a simple process and is easy to adjust and control, and the production cost is reduced. The photocatalyst can be used as a novel photocatalysis material, is high in photocatalysis efficiency under the action of the visible light and meets the requirement and the development direction of a new generation of photocatalysis materials.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials and photocatalysis, and in particular relates to a nanofiber photocatalyst and a preparation method, in particular to an anatase titanium dioxide nanofiber photocatalyst and a preparation method. Background technique [0002] Since Fujishima and Honda discovered in 1972 that titanium dioxide can assist water splitting as a photoanode, titanium dioxide, as a very promising wide-bandgap semiconductor material, has attracted much attention. Due to its excellent physical and chemical properties, such as thermal stability and good chemical stability, environmental friendliness, low toxicity, and low price, titanium dioxide has broad-spectrum application prospects in the fields of photovoltaics, photocatalysis, and sensors. In recent years, the research and application of titanium dioxide in the field of photocatalysis has been in the ascendant, especially in the field of photocatalysis applicatio...

Claims

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Application Information

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IPC IPC(8): D01F9/10D01D5/00D01D10/02B01J21/06B01J35/06
Inventor 乔辉黄锋林蔡以兵魏取福罗乔慧李晓林李静
Owner JIANGNAN UNIV
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