Hollow nano fiber photocatalyst for tantalum compound and preparation method of hollow nano fiber photocatalyst

A hollow nano, photocatalyst technology, applied in the direction of physical/chemical process catalysts, fiber chemical characteristics, chemical instruments and methods, etc., can solve the problems of complex preparation process, small specific surface area, complicated preparation process, etc., and achieve simple preparation method , Large specific surface area, high photocatalytic activity

Active Publication Date: 2015-09-02
浙江百汇建设工程管理有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, researchers have developed nanometer-sized TaON and TaON 3 N 5 (nanoparticles, flower-like supramolecular structures, hollow spheres, etc.) photocatalysts and immobilized films TaON and Ta 3 N 5 , but they are all limited by low photocatalytic activity, difficult recovery and complex preparation process
Tsang et al. used polystyrene pellets as templates to prepare porous TaON membranes (M.Y.Tsang, et.al, Adv.Mater.2012, 24, 3406.), but the preparation process of the template method is relatively complicated and the cost is high, so it is limited. its large-scale application
Li et al prepared Ta by electrospinning 3 N 5 Nanofiber photocatalysts (S.J.Li, et.al, Scientific report 2014, 4, 3978) have achieved certain effects in photocatalytic activity and recycling, but their specific surface area is not large, which limits their application

Method used

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  • Hollow nano fiber photocatalyst for tantalum compound and preparation method of hollow nano fiber photocatalyst
  • Hollow nano fiber photocatalyst for tantalum compound and preparation method of hollow nano fiber photocatalyst
  • Hollow nano fiber photocatalyst for tantalum compound and preparation method of hollow nano fiber photocatalyst

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Experimental program
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Effect test

Embodiment 1

[0040] (1) Preparation of shell and core solutions:

[0041] Shell solution: using the sol-gel method, mix absolute ethanol, N,N-dimethylformamide and acetic acid (volume ratio 3:1:1), then add PVP and tantalum ethoxide to mix, and stir magnetically for 6 hours to obtain Shell solution; wherein the concentration of PVP in the shell solution is 9wt%, and the concentration of tantalum ethoxide in the shell solution is 12wt%.

[0042] Nuclear solution: use heavy oil as the nuclear solution;

[0043] (2) Put the above-mentioned heavy oil and the prepared tantalum ethanol shell solution into the inner and outer channels of the dual-channel nozzle respectively. The diameter is 1.4mm, and then the propulsion speeds of the control shell and the nuclear solution propeller are set to 0.2mL / h and 0.03mL / h respectively, the distance between the nozzle tip and the receiver is 12cm, and a DC voltage of 15,000 volts is applied. The indoor temperature is 22°C, the relative humidity is 35%, ...

Embodiment 2

[0050] (1) Preparation of shell and core solutions:

[0051] Shell solution: using the sol-gel method, mix absolute ethanol, N,N-dimethylformamide and acetic acid (volume ratio 3:1:1), then add PVP and tantalum ethoxide to mix, and stir magnetically for 6 hours to obtain Shell solution; wherein the concentration of PVP in the shell solution is 9wt%, and the concentration of tantalum ethoxide in the shell solution is 12wt%.

[0052] Nuclear solution: use heavy oil as the nuclear solution;

[0053] (2) Put the above-mentioned heavy oil and the prepared tantalum ethanol shell solution into the inner and outer channels of the dual-channel nozzle respectively. The diameter is 1.4mm, and then the propulsion speeds of the control shell and the nuclear solution propeller are set to 0.2mL / h and 0.03mL / h respectively, the distance between the nozzle tip and the receiver is 12cm, and a DC voltage of 15,000 volts is applied. The indoor temperature is 22°C, the relative humidity is 35%, ...

Embodiment 3

[0061] (1) Preparation of shell and core solutions:

[0062]Shell solution: using the sol-gel method, mix absolute ethanol, N,N-dimethylformamide and acetic acid (volume ratio 3:1:1), then add PVP and tantalum ethoxide to mix, and stir magnetically for 6 hours to obtain Shell solution; wherein the concentration of PVP in the shell solution is 9wt%, and the concentration of tantalum ethoxide in the shell solution is 12wt%.

[0063] Nuclear solution: use heavy oil as the nuclear solution;

[0064] (2) Put the above-mentioned heavy oil and the prepared tantalum ethanol shell solution into the inner and outer channels of the dual-channel nozzle respectively. The diameter is 1.4mm, and then the propulsion speeds of the control shell and the nuclear solution propeller are set to 0.2mL / h and 0.03mL / h respectively, the distance between the nozzle tip and the receiver is 12cm, and a DC voltage of 15,000 volts is applied. The indoor temperature is 22°C, the relative humidity is 35%, a...

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Abstract

The invention discloses a hollow nano fiber photocatalyst for a tantalum compound and a preparation method of the hollow nano fiber photocatalyst. The preparation method comprises the following steps: preparing a shell-core solution; carrying out electrostatic spinning by virtue of coaxial electrostatic spinning equipment, and drying a composite fiber, so as to obtain dried composite fiber; burning the dried composite fiber to obtain a Ta2O5 hollow fiber; and carrying out high-temperature nitridation on the Ta2O5 hollow fiber, and thus obtaining a Ta3N5 or TaON hollow nano fiber. The preparation method is simple to operate; and the hollow nano fiber photocatalyst with high photocatalytic activity, large specific surface area and easy-to-recover characteristic can be rapidly prepared.

Description

technical field [0001] The invention belongs to the field of semiconductor photocatalysts, in particular to a tantalum compound hollow nanofiber photocatalyst and a preparation method thereof. Background technique [0002] Due to the increasing environmental pollution and energy crisis in the world, the search for sustainable clean energy and efficient pollution control methods has become the focus of research by researchers around the world. Photocatalysis is a new technology to utilize solar energy. Photocatalytic technology has extremely important applications in the fields of solar energy conversion, environmental governance, sterilization and disinfection, and surface anti-fog. [0003] The core issue of photocatalytic technology is the design and synthesis of photocatalysts. At present, the photocatalysts with good effect and wide application are mainly semiconductors with large energy bandgap, such as TiO 2 And ZnO, etc., unfortunately, they can only use the ultrav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/06B01J35/10C02F1/30D01D5/34D01D1/02D01D5/00D01F9/10C02F101/38
Inventor 李世杰宋文东胡世伟纪丽丽王亚宁蔡璐
Owner 浙江百汇建设工程管理有限公司
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