a ta 3 no 5 /c composite fiber photocatalyst and preparation method thereof

A composite fiber and photocatalyst technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of high cost of graphene, complicated technical operation, etc., and achieve easy recycling and reliable test conditions Controlling and improving photocatalytic activity and stabilizing performance

Active Publication Date: 2017-09-29
浙江百汇建设工程管理有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, in this method, the Ta 3 N 5 Combining with graphene, on the one hand, the cost of graphene is relatively high;

Method used

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  • a ta <sub>3</sub> no <sub>5</sub> /c composite fiber photocatalyst and preparation method thereof
  • a ta <sub>3</sub> no <sub>5</sub> /c composite fiber photocatalyst and preparation method thereof
  • a ta <sub>3</sub> no <sub>5</sub> /c composite fiber photocatalyst and preparation method thereof

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preparation example Construction

[0036] A Ta 3 N 5 The preparation method of / C heterojunction fiber photocatalyst comprises the following steps:

[0037] Step 1, prepare Ta 3 N 5 Spinning liquid: add soluble tantalum salt into the polymer solution and stir for 2-12 hours to obtain Ta 3 N 5 spinning solution.

[0038] The polymer solution contains polyvinylpyrrolidone (PVP), absolute ethanol, N,N-dimethylformamide, and acetic acid, wherein the volume of the absolute ethanol, N,N-dimethylformamide, and acetic acid The ratio is (3-4): 1:1 (for example, it can also be any ratio in 3.2:1:1, 3.5:1:1, 3.8:1:1, 4:1:1, preferably 3 :1:1); The molecular weight of this PVP is 1300000;

[0039] The Ta 3 N 5 In the spinning solution, the mass percentage concentration of the PVP is 5-10wt% (for example, it can be any value in 5wt%, 6wt%, 8wt%, 10wt%, etc. or any range between the two), the soluble The mass percent concentration of the tantalum salt is 5-15wt% (for example, it can be any value in 5wt%, 8wt%, 10wt...

Embodiment 1

[0057] (1) Preparation of Ta 3 N 5 Spinning solution: Add tantalum ethoxide into the polymer solution, and stir for 8 hours to obtain Ta 3 N 5 spinning solution.

[0058] The polymer solution is formed by mixing polyvinylpyrrolidone (PVP), absolute ethanol, N,N-dimethylformamide, and acetic acid, wherein the absolute ethanol, N,N-dimethylformamide and The volume ratio of acetic acid is 3: 1: 1; the molecular weight of the PVP is 1300000;

[0059] The Ta 3 N 5 In the spinning solution, the mass percent concentration of the PVP is 10wt%, and the mass percent concentration of the soluble tantalum salt is 10wt%.

[0060] (2) Preparation of Ta 2 o 5 Fiber: the Ta3N5 spinning liquid is subjected to electrospinning treatment, the conditions are: working voltage (direct current) 12kV, working distance (i.e. the distance between the nozzle tip and the receiver) 20cm, the propulsion speed of the spinning solution (i.e. the propulsion of the propeller) Speed) is: 0.5mL / h, and th...

Embodiment 2

[0069] (1) Preparation of Ta 3 N 5 Spinning solution: Add tantalum ethoxide into the polymer solution and stir for 2-12 hours to obtain Ta 3 N 5 spinning solution.

[0070] The polymer solution is made by mixing polyvinylpyrrolidone (PVP), absolute ethanol, N,N-dimethylformamide, and acetic acid, wherein the absolute ethanol, N,N-dimethylformamide, and acetic acid The volume ratio is 3:1:1; the molecular weight of the PVP is 1300000;

[0071] The Ta 3 N 5 In the spinning solution, the mass percent concentration of the PVP is 10wt%, and the mass percent concentration of the soluble tantalum salt is 10wt%.

[0072] (2) Preparation of Ta 2 o 5 Fiber: the Ta 3 N 5 The spinning solution is subjected to electrospinning treatment, the conditions are: working voltage (direct current) 12kV, working distance (that is, the distance between the tip of the nozzle and the receiver) 20cm, and the advancing speed of the spinning solution (that is, the advancing speed of the propelle...

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Abstract

The invention belongs to the field of metal-containing catalyst preparation, and specifically relates to a Ta3N5 / C composite fiber photocatalyst and a preparation method thereof. The method adopts an electrostatic spinning method to be combined with a hydrothermal method and calcination to prepare the Ta3N5 / C composite fiber photocatalyst. According to the prepared Ta3N5 / C composite fiber photocatalyst, a Ta3N5 nano fiber is evenly coated with a C membrane, a good heterojunction is formed, recombination of photo-generated electrons and holes is effectively restrained, and the Ta3N5 photocatalytic activity and stability performance are improved; besides, the Ta3N5 / C composite fiber photocatalyst has the characteristic of being easy to recycle, is a good photocatalytic material, and has important application values in environment, energy sources and other fields; and the preparation method is simple, equipment and other costs are relatively low, test conditions are controllable, and mass production preparation is facilitated.

Description

technical field [0001] The invention belongs to the field of catalyst preparation containing metal, and in particular relates to a Ta3N5 / C composite fiber photocatalyst and a preparation method thereof. Background technique [0002] Photocatalytic technology is a green technology with important application prospects in the fields of environment and energy. At present, the core of promoting the development of photocatalytic technology is to research and develop highly efficient, stable and easily recyclable visible light photocatalysts. Ta 3 N 5 It is a semiconductor with a narrow energy bandgap (2.1eV), which can use sunlight with a wavelength of 600nm. It is mainly used in wastewater treatment, air purification, and photocatalytic hydrogen production. It has attracted widespread attention from scientists. At present, researchers have developed nano-sized Ta 3 N 5 (nanoparticles, flower-like supramolecular structures, hollow spheres, etc.) photocatalysts, but the nanome...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/06B01J37/10B01J37/34
Inventor 李世杰宋文东胡世伟纪丽丽郭健王亚宁蔡璐姜维
Owner 浙江百汇建设工程管理有限公司
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