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Preparation method of WO3/ZnWO4 composite micro-nano fiber and product of WO3/ZnWO4 composite micro-nano fiber

A micro-nano fiber, a certain amount of technology, applied in the direction of nanotechnology, nanotechnology, fiber processing, etc., to achieve the effect of strong operability, expansion of research fields, and high yield

Inactive Publication Date: 2017-10-27
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the conventional electrospinning method to prepare WO 3 / ZnWO 4 The problem of composite micro-nano fiber, the object of the present invention is to provide a kind of method is simple, the raw material is cheap and easy to get, the fiber diameter and the size of the surface loaded particles are controllable, and the production rate is large. 3 / ZnWO 4 Preparation method of composite micro-nano fiber and the surface produced by this method has WO 3 WO of heterogeneous particles 3 / ZnWO 4 Composite micro-nano fiber

Method used

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  • Preparation method of WO3/ZnWO4 composite micro-nano fiber and product of WO3/ZnWO4 composite micro-nano fiber
  • Preparation method of WO3/ZnWO4 composite micro-nano fiber and product of WO3/ZnWO4 composite micro-nano fiber
  • Preparation method of WO3/ZnWO4 composite micro-nano fiber and product of WO3/ZnWO4 composite micro-nano fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Add 0.7419 g of zinc nitrate hexahydrate (Zn(NO 3 ) 2 ∙6H 2 O) and 0.8188 g of 2-methylimidazole were respectively dissolved in 50.0 mL of methanol solvent, stirred to obtain a transparent solution, mixed evenly, stirred for 1 h, left to stand for 24 h, centrifuged and washed with methanol solvent for 3 times, and then evaporated Dried naturally in a dish to obtain the Zif-8 product;

[0034] (2) Dissolve 1.0 mL of polyethylene glycol 200, 1.0 mL of formamide, and 0.0136 g of Zif-8 in 4.0 mL of Tris-HCl buffer in sequence, and stir to obtain a transparent solution 1;

[0035] (3) Dissolve 0.3000 g of tungstic acid in 6.0 mL of ammonia water, heat and stir to obtain a transparent solution 2;

[0036] (4) Dissolve 1.5540 g of PVP in a mixed solvent of 5.0 mL of absolute ethanol and 2.0 mL of deionized water, and stir to obtain a transparent solution 3;

[0037] (5) According to the volume ratio of 1:1:1.2, solution 1 and solution 2 were added dropwise to solution ...

Embodiment 2

[0041] (1) Add 0.7419 g of Zn(NO 3 ) 2 ∙6H 2 O and 0.7430 g of 2-methylimidazole were respectively dissolved in 46 mL of methanol solvent, stirred to obtain a transparent solution, mixed evenly, stirred for 2 h, left to stand for 24 h, washed with methanol solvent for 3 times, and placed in an evaporating dish Dry naturally in medium to obtain Zif-8 product;

[0042] (2) Dissolve 1.0 mL of polyethylene glycol 200, 1.2 mL of formamide, and 0.0075 g of Zif-8 in 3.8 mL of Tris-HCl buffer in sequence, and stir to obtain a transparent solution 1;

[0043] (3) Dissolve 0.2325 g of tungstic acid in 6.0 mL of ammonia water, heat and stir to obtain a transparent solution 2;

[0044] (4) Dissolve 1.2850 g of PVP in a mixed solvent of 5.0 mL of absolute ethanol and 2.0 mL of deionized water, and stir to obtain a transparent solution 3;

[0045] (5) According to the volume ratio of 1:1:1, solution 1 and solution 2 were added dropwise to solution 3 at a rate of 0.3 mL / min. After the th...

Embodiment 3

[0048] (1) Add 0.7419 g of Zn(NO 3 ) 2 ∙6H 2 O and 0.8915 g of 2-methylimidazole were respectively dissolved in 48 mL of methanol solvent, stirred to obtain a transparent solution, mixed evenly and stirred for 1 h, after standing for 24 h, washed with methanol solvent for 3 times, placed in an evaporating dish Dry naturally in medium to obtain Zif-8 product;

[0049] (2) Dissolve 1.0 mL of polyethylene glycol 200, 1.5 mL of formamide, and 0.1771 g of Zif-8 in 3.5 mL of Tris-HCl buffer in sequence, and stir to obtain a transparent solution 1;

[0050] (3) Dissolve 0.3600 g of tungstic acid in 6.0 mL of ammonia water, heat and stir to obtain a transparent solution 2;

[0051] (4) Dissolve 1.7871 g of PVP in a mixed solvent of 5.0 mL of absolute ethanol and 2.0 mL of deionized water, and stir to obtain a transparent solution 3;

[0052] (5) According to the volume ratio of 1:1:1.4, solution 1 and solution 2 were added dropwise to solution 3 at a rate of 0.5 mL / min. After the ...

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Abstract

The invention discloses a preparation method of WO3 / ZnWO4 composite micro-nano fiber. The preparation method comprises the following steps: firstly, preparing Zif-8 from zinc salt and dimethyl imidazole which serve as a raw material; then adding polyethylene glycol 200 and formamide to prepare a Tris-HCl solution of the Zif-8; dissolving tungstic acid in ammonia water, so as to obtain a solution; slowly dropwise adding the two solutions into a polyvinylpyrrolidone (PVP) solution, so as to obtain a precursor spinning solution, and performing electrostatic spinning and thermal treatment, so as to obtain a final product. According to the WO3 / ZnWO4 composite micro-nano fiber produced through the preparation method, a fiber main body is formed by compounding WO3 and ZnWO4 nano particles, and WO3 heterogeneous phase particles are generated on the surface. A metal organic framework material (Zif-8) is introduced into a synthesis process of the WO3 fiber, so that the preparation process is simple and convenient, high in reaction controllability and high in operability; a crystal phase structure and a microstructure of the product are adjustable, and the product has high repetitiveness. The WO3 / ZnWO4 composite micro-nano fiber obtained through the preparation method has an important market application prospect on the aspects of gas sensitivity, catalysis and the like.

Description

technical field [0001] The present invention relates to a WO 3 / ZnWO 4 The preparation method of composite micro-nano fiber, specifically relates to a kind of fiber surface with WO 3 Size-tunable heterogeneous particles of WO 3 / ZnWO 4 Preparation method of composite micro-nano fiber. Background technique [0002] The rapid development of industrial technology has led to the continuous release of a large amount of harmful gases into the air, which has brought great harm to human health and the ecological environment. The development of semiconductor gas-sensing materials can effectively realize the detection of various gases, and to a certain extent, real-time monitoring of the atmospheric environment, which has important practical value. [0003] At present, common semiconductor gas-sensing materials mainly focus on SnO 2 , Fe 2 o 3 、In 2 o 3 , ZnO, WO 3 Such typical semiconductor oxides, after years of research, can prepare semiconductor gas-sensing materials wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/08D01D5/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00D01D5/003D01F9/08
Inventor 马谦李绘陈迎宫玉坤张进涛韩智峰褚姝姝刘凯瑞王雪华杨萍
Owner UNIV OF JINAN
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