A preparation method and application of titanium dioxide/indium vanadate heterostructure nanofibers

A nanofiber, heterostructure technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, fiber processing, etc., can solve the problem of uneven distribution of heterojunctions, difficult to control sample morphology, Problems such as redundant experimental steps, to achieve the effect of enhancing gas sensitivity, stable heterostructure, and simple preparation process

Inactive Publication Date: 2020-07-10
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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  • A preparation method and application of titanium dioxide/indium vanadate heterostructure nanofibers
  • A preparation method and application of titanium dioxide/indium vanadate heterostructure nanofibers
  • A preparation method and application of titanium dioxide/indium vanadate heterostructure nanofibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) 0.68g of tetrabutyl titanate, 1.6g of absolute ethanol, 1.68g of glacial acetic acid and 0.28g of polyvinylpyrrolidone (average molecular weight: 1,300,000) were mixed and stirred for 2 hours to form a homogeneous solution, which was designated as solution A; 0.18g of vanadium oxide diacetylacetonate, 0.19g of hydrated indium nitrate (In(NO 3 ) 3 ﹒ 4.5H 2 (0), 0.16g of polyvinylpyrrolidone (average molecular weight is 1300000) and 2g of dimethylacetamide mixed and stirred for 1h to form a homogeneous solution and denoted as solution B; finally the uniformly stirred A solution and B solution were mixed and then stirred for 5h until the solution is uniform, TBT / In(NO 3 ) 3 / VO(acac) 2 / PVP electrospinning precursor solution.

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

Embodiment 2

[0052] (1) 0.34g of tetrabutyl titanate, 0.8g of absolute ethanol, 0.84g of glacial acetic acid and 0.14g of polyvinylpyrrolidone (average molecular weight: 1,300,000) were mixed and stirred for 1 hour to form a homogeneous solution, which was designated as solution A; 0.18g of vanadium oxide diacetylacetonate, 0.19g of hydrated indium nitrate (In(NO 3 ) 3 ﹒ 4.5H 2 (2), the polyvinylpyrrolidone (average molecular weight is 1300000) of 0.16g and the dimethylacetamide of 2g are mixed and stirred for 1h to form a homogeneous solution and be referred to as solution B; finally the A solution and the B solution that are stirred are mixed and stirred for 2h to Evenly, TBT / In(NO 3 ) 3 / VO(acac) 2 / PVP electrospinning precursor solution.

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

Embodiment 3

[0056] (1) 0.34g of tetrabutyl titanate, 0.8g of absolute ethanol, 0.84g of glacial acetic acid and 0.18g of polyvinylpyrrolidone (average molecular weight: 1,300,000) were mixed and stirred for 1 hour to form a homogeneous solution, which was designated as solution A; With 0.27g vanadium diacetylacetonate, 0.38g hydrated indium nitrate (In(NO 3 ) 3 ﹒ 4.5H 2 O), 0.32g of polyvinylpyrrolidone (average molecular weight is 1300000) and dimethylacetamide of 4g are mixed and stirred for 1h to form a homogeneous solution, which is referred to as solution B; finally the uniformly stirred A solution is mixed with the B solution and stirred for 3h to uniformity, TBT / In(NO 3 ) 3 / VO(acac) 2 / PVP electrospinning precursor solution.

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

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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 present invention relates to a kind of TiO 2 / InVO 4 The preparation method and application of heterostructure nanofibers belong to the field of nanomaterial preparation. Background technique [0002] With the aggravation of environmental pollution and energy shortage in recent years, seeking a highly efficient visible light catalyst is one of the major issues at present. TiO since 1972 2 After the catalytic performance of TiO was discovered, people aimed at TiO 2 Research on photocatalysts has never stopped, TiO 2 Semiconductors are considered to be promising photocatalysts due to their stable physical and chemical properties, non-toxicity and environmental friendliness. However, its wide bandgap (3.0-3.2eV), low utilization rate of sunlight, and high photogenerated electron-hole recombination rate still limit its further development and application. [0003] Using narrow bandgap semiconductors and TiO 2 Coupling is an effective way to impr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/08B01J23/22B01J35/00B01J35/06D01D5/00
CPCB01J23/22B01J35/004B01J35/06D01D5/0069D01D5/0092D01F9/08
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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