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One-step process for preparing copper-doped tungsten trioxide composite nano-fiber material

A technology of composite nanofibers and tungsten trioxide, applied in the field of nanomaterials, can solve the problems of difficulty in obtaining photocatalytic ability, low photocatalytic activity, low utilization rate of visible light, etc., and achieves improved photocatalytic degradation performance and strong photocatalytic performance. , the effect of excellent degradation of aniline performance

Active Publication Date: 2017-12-12
INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the photocatalytic activity of pure tungsten trioxide is relatively low, and there are defects such as easy photocorrosion and low utilization rate of visible light, so it is difficult to obtain stable and efficient photocatalytic ability.

Method used

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  • One-step process for preparing copper-doped tungsten trioxide composite nano-fiber material
  • One-step process for preparing copper-doped tungsten trioxide composite nano-fiber material
  • One-step process for preparing copper-doped tungsten trioxide composite nano-fiber material

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Dissolve 3.5g of commercially available ammonium metatungstate in 10ml of deionized water, add polyvinylpyrrolidone (PVP) with a molecular weight of 1,300,000 in an amount of 2g, and then add 0.05g of CuCl 2 2H 2 0, stir until the solution is blue and uniform and transparent to obtain the precursor solution; then by uniaxial electrospinning, the voltage is 25KV, the receiving distance is 15cm, and the advancing speed is 0.02ml / min, to obtain white cloth-like as-spun fibers; The fibers were calcined in a muffle furnace at 600°C with a heating rate of 3°C / min, kept for 3 hours, and cooled naturally to room temperature to obtain copper-doped tungsten trioxide composite nanofibers.

Embodiment 2

[0035] Dissolve 3.5g of hydrated ammonium metatungstate in 10ml of deionized water, add polyvinylpyrrolidone (PVP) with a molecular weight of 1300000, and add 1.5g, then add 0.08g of CuCl 2 2H 2 0, stir until the solution is blue uniform and transparent to obtain the precursor solution; then by uniaxial electrospinning, the voltage is 20KV, the receiving distance is 12cm, and the advancing speed is 0.05ml / min, to obtain white cloth-like as-spun fibers; The fibers were calcined in a muffle furnace at 650°C with a heating rate of 5°C / min, kept for 3 hours, and cooled naturally to room temperature to obtain copper-doped tungsten trioxide composite nanofibers.

Embodiment 3

[0037] Dissolve 5.0g of hydrated ammonium metatungstate in 10ml of deionized water, add polyvinylpyrrolidone (PVP) with a molecular weight of 1300000, and add 2.0g, then add 0.12g of CuCl 2 2H 2 0, stir until the solution is blue uniform and transparent to obtain the precursor solution; then by uniaxial electrospinning, the voltage is 24KV, the receiving distance is 15cm, and the advancing speed is 0.1ml / min, to obtain white cloth-like as-spun fibers; The fibers were calcined in a muffle furnace at 650°C with a heating rate of 5°C / min, kept for 3 hours, and cooled naturally to room temperature to obtain copper-doped tungsten trioxide nanofibers.

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Abstract

The invention discloses a one-step process for preparing a copper-doped tungsten trioxide composite nano-fiber material. The process comprises the following steps: S1, dissolving ammonium metatungstate in water, adding polyvinylpyrrolidone and a copper salt solution, and stirring to obtain a precursor solution; S2, performing electrostatic spinning on the precursor solution in S1 so as to obtain as-spun fibers; S3, calcining the as-spun fibers prepared in S2, thereby obtaining the material. The method provided by the invention is simple, feasible, accurately controllable in parameters, low in cost, green and environmental-friendly; the prepared copper-doped tungsten trioxide composite nano-fiber material is uniform in diameter distribution, large in draw ratio and stable in morphology, and due to copper doping, the photocatalytic degradation performance of tungsten trioxide is greatly improved. Furthermore, the composite nano-fiber material has excellent aniline degradation performance and has excellent application prospects in the field of water body pollution.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and more specifically relates to the preparation of copper-doped tungsten trioxide composite nanofiber materials in one step. Background technique [0002] Due to the continuous progress of human civilization, the problem of environmental pollution is becoming more and more serious, including water pollution, harmful gas pollution and so on. These environmental problems are inseparable from human life, and they are constantly threatening the survival and safety of human beings. Therefore, finding an effective method to solve these environmental problems has become a major issue without delay. The emergence of photocatalytic technology provides a good way to solve the problem of water pollution. It has the ability to use light energy to degrade, avoid energy loss, and can decompose organic pollutants into harmless substances such as water and carbon dioxide, which can effectively Sol...

Claims

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Application Information

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IPC IPC(8): D01F9/08D01F1/10B01J23/888C02F1/30C02F101/38
CPCD01F1/10D01F9/08C02F1/30B01J23/888C02F2305/10C02F2101/38B01J35/58B01J35/39
Inventor 王新马歌陈志鸿金名亮周国富
Owner INT ACAD OF OPTOELECTRONICS AT ZHAOQING SOUTH CHINA NORMAL UNIV
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