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Application of N-doped TiO2 nano fiber in high-efficiency visible light photocatalyst

A technology of nanofibers and photocatalysts, applied in the direction of physical/chemical process catalysts, nanotechnology, nanotechnology, etc., can solve the problems of poor adsorption and desorption capacity of photocatalytic participants, poor photocatalyst stability, and poor photocatalytic stability. Achieve the effect of good reusability, low application cost and stable quality

Inactive Publication Date: 2015-11-04
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from the perspective of practical application, traditional TiO 2 Photocatalysts still have the following problems: 1) The spectral response range is <380nm, there is no visible light response, and the utilization rate of solar energy is very low; 2) Commercial nano-powder photocatalysts are easy to agglomerate in the liquid phase system, and the photocatalytic stability is poor and It is difficult to separate and recycle; 3) The specific surface area is low, the adsorption and desorption ability of photocatalytic participants is poor, and the photocatalytic efficiency is low
However, a lot of research work often can only solve one of the problems, such as the synthesis of N-doped TiO 2 Photocatalysts still have disadvantages such as poor stability and low specific surface area, and the improvement of photocatalytic efficiency has limitations. N-doped TiO 2 The research and development of fully mesoporous nanofibers with high-efficiency visible light photocatalysts still faces severe challenges

Method used

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  • Application of N-doped TiO2 nano fiber in high-efficiency visible light photocatalyst
  • Application of N-doped TiO2 nano fiber in high-efficiency visible light photocatalyst
  • Application of N-doped TiO2 nano fiber in high-efficiency visible light photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Weigh 0.9g of polyvinylpyrrolidone (PVP) and 4.0g of butyl titanate (TBOT) and dissolve them in a mixture of 7ml of absolute ethanol and 3ml of glacial acetic acid, stir and mix at room temperature for 8 hours, then add 1.2g of azodicarboxylate isopropyl ester (foaming agent, DIPA) and 0.5 g urea and continued stirring for 2 hours to obtain a precursor spinning solution. After the spinning liquid is left to stand, measure 6ml and inject it into a plastic needle tube, and place it on a micro-injection pump, and set the injection speed (single-needle injection speed) to 1ml / h. The metal needle is used as the electrospinning anode, and the barbed wire is used as the cathode of the receiving material. The distance between the anode and the cathode is 20cm. Electrospinning is carried out under 20kV high voltage (electrostatic field strength 1KV / cm) to prepare organic precursor fiber materials. Then the organic precursor fiber material is placed in a 60°C constant temperature...

Embodiment 2

[0062] Weigh 0.9g of polyvinylpyrrolidone (PVP) and 4.0g of butyl titanate (TBOT) and dissolve in a mixture of 7ml of absolute ethanol and 3ml of glacial acetic acid, stir and mix at room temperature for 8 hours, then add 0.5g of urea and continue to stir for 2 hours to obtain the precursor spinning solution. After the spinning liquid is left to stand, measure 6ml and inject it into a plastic needle tube, and place it on a micro-injection pump, and set the injection speed (single-needle injection speed) to 1ml / h. The metal needle is used as the electrospinning anode, and the barbed wire is used as the cathode of the receiving material. The distance between the anode and the cathode is 20cm. Electrospinning is carried out under 20kV high voltage (electrostatic field strength 1KV / cm) to prepare organic precursor fiber materials. Then the organic precursor fiber material is placed in a 60°C constant temperature oven to obtain a solid organic precursor fiber ( Figure 7 ). Final...

Embodiment 3

[0064] Weigh 0.9g of polyvinylpyrrolidone (PVP) and 4.0g of butyl titanate (TBOT) and dissolve them in a mixture of 7ml of absolute ethanol and 3ml of glacial acetic acid, stir and mix at room temperature for 8 hours, then add 1.2g of azodicarboxylate isopropyl ester (foaming agent, DIPA) and continued to stir for 2 hours to obtain the precursor spinning solution. After the spinning liquid is left to stand, measure 6ml and inject it into a plastic needle tube, and place it on a micro-injection pump, and set the injection speed (single-needle injection speed) to 1ml / h. The metal needle is used as the electrospinning anode, and the barbed wire is used as the cathode of the receiving material. The distance between the anode and the cathode is 20cm. Electrospinning is carried out under 20kV high voltage (electrostatic field strength 1KV / cm) to prepare organic precursor fiber materials. Then the organic precursor fiber material is placed in a 60°C constant temperature oven to obtai...

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Abstract

The invention discloses an application of N-doped TiO2 nano fiber in a high-efficiency visible light photocatalyst, the main composition elements of the nano fiber is Ti, O and N, wherein, a main expression form of Ti and O elements in nano fiber is TiO2, N is a doping element; the nano fiber has a porous structure, and the pore of the porous structure comprises meso pore. The N-doped TiO2 nano fiber has the advantages of high catalytic activity, low application cost, good repetition usage performance of the catalyst, and regeneration and reuse.

Description

technical field [0001] The invention relates to the application of an inorganic semiconductor optoelectronic material, especially N-doped TiO 2 Application of nanofibers in highly efficient visible light photocatalysts. [0002] Mesoporous material refers to a material with a porous structure and a pore diameter between 2 and 50 nanometers; at% atomic percent. Background technique [0003] TiO 2 It is an important inorganic semiconductor photoelectric material, which has been widely used in the fields of photocatalysis, sewage treatment and solar cells. However, due to TiO 2 It is a typical wide-bandgap semiconductor (Eg=3.2eV), so that it has photoexcitation activity only under the irradiation of ultraviolet light with a wavelength less than 387nm, and this part of light energy only accounts for 3% to 5% of the solar energy on the ground , the utilization rate of solar energy is very low, which greatly limits the TiO 2 Industrial application and promotion of materials....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J27/24B01J35/10B82Y30/00B82Y40/00C02F1/30C02F101/38
CPCY02W10/37
Inventor 杨为佑侯慧林
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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