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Preparation method of titanium dioxide/indium vanadate heterostructure nanometer fiber and application thereof

A technology of nanofibers and heterostructures, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, fiber treatment, etc. Complicated experimental steps and other problems, to achieve the effect of enhanced gas sensitivity, good morphology and structure, and simple preparation process

Inactive Publication Date: 2018-07-06
XIANGTAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This preparation method is cumbersome, the experimental steps are cumbersome, and the sample morphology is difficult to control, and the distribution of heterojunctions is not uniform.

Method used

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  • Preparation method of titanium dioxide/indium vanadate heterostructure nanometer fiber and application thereof
  • Preparation method of titanium dioxide/indium vanadate heterostructure nanometer fiber and application thereof
  • Preparation method of titanium dioxide/indium vanadate heterostructure nanometer fiber and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Mix 0.68g of tetrabutyl titanate, 1.6g of absolute ethanol, 1.68g of glacial acetic acid and 0.28g of polyvinylpyrrolidone (with an average molecular weight of 1,300,000) and stir for 2h to form a uniform solution, which is referred to as solution A; 0.18g of vanadium oxide diacetylacetonate, 0.19g of hydrated indium nitrate (In(NO 3 ) 3 ﹒ 4.5H 2 O), 0.16g of polyvinylpyrrolidone (average molecular weight of 1.300000) and 2g of dimethylacetamide were mixed and stirred for 1h to form a uniform solution, which was marked as solution B; finally, the evenly stirred A solution and B solution were mixed and stirred for another 5h Until the solution is uniform, TBT / In(NO 3 ) 3 / VO(acac) 2 / PVP electrospinning precursor solution.

[0040] (2) Spin the viscous mixed solution C by electrospinning to obtain nanofibers. The specific parameters of electrospinning are as follows: the inner diameter of the electrospinning needle is 0.4mm, and the distance between the bottom end of th...

Embodiment 2

[0052] (1) Mix 0.34g of tetrabutyl titanate, 0.8g of absolute ethanol, 0.84g of glacial acetic acid and 0.14g of polyvinylpyrrolidone (with an average molecular weight of 1,300,000) and stir for 1 hour to form a uniform solution, which is referred to as solution A; 0.18g of vanadium oxide diacetylacetonate, 0.19g of hydrated indium nitrate (In(NO 3 ) 3 ﹒ 4.5H 2 O), 0.16g of polyvinylpyrrolidone (average molecular weight of 1.300000) and 2g of dimethylacetamide were mixed and stirred for 1h to form a uniform solution, which was recorded as solution B; finally, the evenly stirred A solution and B solution were mixed and stirred for 2h to Evenly, get TBT / In(NO 3 ) 3 / VO(acac) 2 / PVP electrospinning precursor solution.

[0053] (2) Spin the viscous mixed solution C by electrospinning to obtain nanofibers. The specific parameters of electrospinning are as follows: the inner diameter of the electrospinning needle is 0.4mm, and the distance between the bottom end of the needle and the m...

Embodiment 3

[0056] (1) Mix 0.34g of tetrabutyl titanate, 0.8g of absolute ethanol, 0.84g of glacial acetic acid and 0.18g of polyvinylpyrrolidone (with an average molecular weight of 1,300,000) and stir for 1 hour to form a uniform solution, which is referred to as solution A; 0.27g vanadium oxide diacetylacetonate, 0.38g indium nitrate hydrate (In(NO 3 ) 3 ﹒ 4.5H 2 O), 0.32g of polyvinylpyrrolidone (average molecular weight of 1.300000) and 4g of dimethylacetamide were mixed and stirred for 1h to form a uniform solution, which was recorded as solution B; finally, the evenly stirred A solution and B solution were mixed and stirred for another 3h To uniformity, get TBT / In(NO 3 ) 3 / VO(acac) 2 / PVP electrospinning precursor solution.

[0057] (2) Spin the viscous mixed solution C by electrospinning to obtain nanofibers. The specific parameters of electrospinning are as follows: the inner diameter of the electrospinning needle is 0.4mm, and the distance between the bottom end of the needle and ...

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Abstract

The invention relates to a preparation method of titanium dioxide / indium vanadate heterostructure nanometer fiber and application thereof. The method comprises the following steps: selecting a narrow-band gap semiconductor InVO4 with visible light response, and enabling the same to couple with the TiO2, and preparing a two-phase separated TiO2 / InVO4 heterostructure nanometer fiber through a simpleand common one-step static spinning method. The TiO2 / InVO4 heterostructure nanometer fiber disclosed by the invention can be used as an optical catalyst, proved by tests, the visible light catalysisrate of the nanometer fiber is 15 times that of the TiO2 nanometer fiber, and the extremely high visible light catalytic activity is provided.

Description

Technical field [0001] The invention relates to a TiO 2 / InVO 4 The preparation method and application of heterostructure nanofibers belong to the field of nanomaterial preparation. Background technique [0002] With the intensification of environmental pollution and energy shortages in recent years, seeking an efficient visible light catalyst is one of the current major issues. TiO since 1972 2 After its catalytic performance was discovered, people focused on TiO 2 The research of photocatalyst has never stopped, TiO 2 Semiconductors are considered to be a photocatalyst with great application prospects due to their stable physical and chemical properties, non-toxic and environmentally friendly advantages. However, its large forbidden band width (the forbidden band width is 3.0~3.2eV), the utilization rate of sunlight is low, and the high photogenerated electron-hole recombination rate still limits its further development and application. [0003] Using narrow band gap semiconduct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/08B01J23/22B01J35/00B01J35/06D01D5/00
CPCD01D5/0069D01D5/0092D01F9/08B01J23/22B01J35/39B01J35/58
Inventor 周云王媛欧阳晓平吴涛李珺煜丁秋杰祝文军齐福刚刘利新陈静曹红帅
Owner XIANGTAN UNIV
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