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A kind of preparation method of tantalum oxynitride based non-woven fabric photocatalyst

A technology of tantalum oxynitride and catalyst is applied in the field of preparation of tantalum oxynitride-based non-woven photocatalyst, can solve the problems of high cost, complicated preparation process, complicated preparation process, etc., and achieves easy recycling and reuse, high photocatalytic activity, Simple preparation method

Inactive Publication Date: 2016-06-08
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, researchers have developed nano-sized TaON (nanoparticles, flower-like supramolecular structures, hollow spheres, etc.) and fixed-film TaON photocatalysts, but they are all limited by low photocatalytic activity, difficult recycling and complex preparation processes.
Recently, it has been reported that flower-shaped TaON was prepared by solvothermal method (Z.Wang, et.al, EnergyEnviron.Sci2013, 6, 2134.), and the toxic substance hydrofluoric acid was used in the preparation process, which may easily cause casualties or pollute the environment
In addition, Tsang et al. used polystyrene beads as templates to prepare porous TaON membranes (M.Y.Tsang, et.al, Adv.Mater.2012, 24, 3406.), but the preparation process of this template method is relatively complicated and the cost is high. Therefore, its large-scale application is limited

Method used

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  • A kind of preparation method of tantalum oxynitride based non-woven fabric photocatalyst
  • A kind of preparation method of tantalum oxynitride based non-woven fabric photocatalyst
  • A kind of preparation method of tantalum oxynitride based non-woven fabric photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Using a sol-gel method, mix absolute ethanol and acetic acid (volume ratio 3:1), then add 8wt% PVP and 10wt% tantalum ethoxide, mix and stir for 5 hours to obtain a spinning solution. The above-mentioned spinning solution is spun, the distance between the nozzle tip and the receiver is 15cm, a DC voltage of 12,000 volts is applied, and the advancing speed of the syringe is 0.3mLh -1 . A composite polymer nonwoven fabric was obtained. Arrange the collected composite polymer nonwovens in a muffle furnace and calcinate at 600 degrees for 10 hours to obtain Ta 2 o 5 non-woven fabric. Will Ta 2 o 5 The non-woven fabric is arranged in a tube furnace for high-temperature nitriding at 800 degrees for 12 hours, and after the reaction is completed, the NH 3 Cool to room temperature under atmosphere. Among them, ammonia gas passes through a container filled with 30°C water before entering the tube furnace, and the flow rate of ammonia gas is 0.1Lmin -1 , to obtain TaON non...

Embodiment 2

[0039] Using the sol-gel method, mix absolute ethanol and acetic acid (volume ratio 4:1), then add 8wt% PVP and 10wt% tantalum ethoxide, mix and stir for 5 hours to obtain a spinning solution. The above-mentioned spinning solution is spun, the distance between the nozzle tip and the receiver is 15cm, a DC voltage of 12,000 volts is applied, and the advancing speed of the syringe is 0.3mLh -1 . A composite polymer nonwoven fabric was obtained. Arrange the collected composite polymer nonwovens in a muffle furnace and calcinate at 600 degrees for 10 hours to obtain Ta 2 o 5 non-woven fabric. Will Ta 2 o 5 The non-woven fabric is arranged in a tube furnace for high-temperature nitriding at 850 degrees for 10 hours, and after the reaction is completed, the NH 3Cool to room temperature under atmosphere. Among them, ammonia gas passes through a container filled with 30°C water before entering the tube furnace, and the flow rate of ammonia gas is 0.1Lmin -1 , to obtain TaON no...

Embodiment 3

[0043] Using a sol-gel method, mix absolute ethanol and acetic acid (volume ratio 3:1), then add 8wt% PVP and 10wt% tantalum ethoxide, mix and stir for 5 hours to obtain a spinning solution. The above-mentioned spinning solution is spun, the distance between the nozzle tip and the receiver is 15cm, a DC voltage of 12,000 volts is applied, and the advancing speed of the syringe is 0.3mLh -1 . A composite polymer nonwoven fabric was obtained. Arrange the collected composite polymer nonwovens in a muffle furnace and calcinate at 700 degrees for 10 hours to obtain Ta 2 o 5 non-woven fabric. Will Ta 2 o 5 The non-woven fabric is arranged in a tube furnace for high-temperature nitriding at 800 degrees for 10 hours, and after the reaction is completed, the NH 3 Cool to room temperature under atmosphere. Among them, ammonia gas passes through a container filled with 30°C water before entering the tube furnace, and the flow rate of ammonia gas is 0.1Lmin -1 , to obtain TaON non...

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Abstract

The invention relates to a preparation method of an oxygen-nitrogen-tantalum based non-woven photo-catalyst. The preparation method comprises the following steps: (1) preparing a spinning solution by using a sol-gel method; (2) carrying out electrostatic spinning by using the spinning solution to obtain a composite polymer non-woven fabric; (3) calcining the non-woven fabric to obtain a TaO5 non-woven fabric; (4) nitriding the TaO5 non-woven fabric at the high temperature and cooling the TaO5 non-woven fabric in NH3 atmosphere to the room temperature after completing reaction to obtain a TaON non-woven fabric; and (5) reducing a noble metal source through in-situ optical reduction catalysis under the irradiation of ultraviolet or visible light and loading the noble metal source to the surface of oxygen-nitrogen-tantalum nanofiber to obtain the oxygen-nitrogen-tantalum based non-woven photo-catalyst. The oxygen-nitrogen-tantalum based non-woven photo-catalyst is simple in preparation method, low in cost and suitable for large-scale production; the prepared oxygen-nitrogen-tantalum based non-woven photo-catalyst material with a graded porous nano-structure is high in photo-catalytic activity; meanwhile, the oxygen-nitrogen-tantalum based non-woven photo-catalyst material is easy to recycle, so that the oxygen-nitrogen-tantalum based non-woven photo-catalyst material is an excellent photo-catalyst material.

Description

technical field [0001] The invention belongs to the field of semiconductor photocatalysts, in particular to a preparation method of a tantalum oxynitride-based non-woven fabric photocatalyst. Background technique [0002] The development and utilization of solar energy has become an important issue facing the world today. Photocatalytic technology is a green technology with important application prospects in the environmental field. On the one hand, it can photocatalytically decompose water to produce clean hydrogen energy and solve the energy crisis; on the other hand, it can photocatalytically degrade and eliminate toxic organic pollutants in the environment, realizing a cheap and feasible way of environmental governance. Therefore, photocatalytic technology is expected to become an important way to effectively solve environmental and energy problems in the future. The core of photocatalytic technology is to research and develop excellent photocatalysts. [0003] The cu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/06
Inventor 张丽莎李世杰柳建设王焕丽黄菲赵慧慧张俊磊
Owner DONGHUA UNIV
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