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Preparation method of high-purity ZnO/BiVO4 heterogeneous micro-ribbon

A micro-strip, high-purity technology used in the field of micro-strips

Active Publication Date: 2017-09-22
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no literature related to ZnO / BiVO in the prior art 4 Preparation of heterogeneous microribbons

Method used

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  • Preparation method of high-purity ZnO/BiVO4 heterogeneous micro-ribbon
  • Preparation method of high-purity ZnO/BiVO4 heterogeneous micro-ribbon
  • Preparation method of high-purity ZnO/BiVO4 heterogeneous micro-ribbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Respectively take by weighing the polyvinylpyrrolidone (PVP) 0.7g that molecular weight is 1300000 and the PVP0.3g that molecular weight is 40000 and be dissolved in the mixed solvent that contains 2.5g dehydrated alcohol, 2.0g glacial acetic acid and 2.5g dimethylformamide, room temperature After stirring and mixing for 3 hours, add 1.21g bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O), 0.662g bis(acetylacetonate) vanadium oxide (VO(acac) 2 ) and 1.0 g of diisopropyl azodicarboxylate (foaming agent, DIPA) and continued stirring for 3 hours to obtain a precursor spinning solution.

[0049] After the spinning solution was left to stand, 5ml was measured and injected into a plastic needle tube, and placed on an electrospinning machine, and the injection speed was set at 1ml / h. The metal needle is used as the electrospinning anode, and the barbed wire is used as the cathode of the receiving material. The distance between the anode and the cathode is 20cm. Electrospin...

Embodiment 2

[0053] The only difference from Example 1 is that in this example, when the solid-state precursor microribbon deposits ZnO in the atomic layer deposition (ALD) system, after 300 cycles, the others are the same as in Example 1, and will not be repeated here. .

[0054] A typical scanning electron microscope (SEM) image of the as-prepared nanofibrous material at different magnifications is as follows: Figure 10 and Figure 11 , indicating that the prepared material is a microribbon. Figure 12 Its corresponding X-ray diffraction pattern shows that the prepared microribbons are ZnO / BiVO 4 composite material. Figure 13 Its corresponding element distribution energy spectrum (EDS) diagram shows that ZnO / BiVO 4 ZnO and BiVO in Heterogeneous Microbelts 4 The content ratio is 5:1. Comparing the results of Example 1, it can be seen that when the number of cycles of ALD deposition of ZnO is reduced to 300, the final material prepared by calcination is still a micro-ribbon materia...

Embodiment 3

[0056] The only difference from Example 1 is that in this example, when the solid precursor microbelt deposits ZnO in the atomic layer deposition (ALD) system, after 500 cycles, the others are the same as in Example 1, and will not be repeated here. .

[0057] A typical scanning electron microscope (SEM) image of the as-prepared nanofibrous material at different magnifications is as follows: Figure 14 and Figure 15 , indicating that the prepared material is a microribbon. Figure 16 Its corresponding X-ray diffraction pattern shows that the prepared microribbons are ZnO / BiVO 4 composite material. Figure 17 Its corresponding element distribution energy spectrum (EDS) diagram shows that ZnO / BiVO 4 ZnO and BiVO in Heterogeneous Microbelts 4 The content ratio is 9:1.

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Abstract

The invention relates to a preparation method of a high-purity ZnO / BiVO4 heterogeneous micro-ribbon, and belongs to the technical field of the micro-ribbon. The preparation method includes steps of dissolving polyvinylpyrrolidone, bismuth nitrate pentahydrate, bis(acetylacetone) vanadium oxide and diisopropyl azodicarboxylate in a mixed solvent; stirring and mixing under a room temperature to form a precursor spinning fluid; performing electrostatic spinning on the precursor spinning fluid to obtain a solid precursor micro-ribbon; placing the solid precursor micro-ribbon in an atomic layer deposition system; reacting with water by diethylzinc; after circulation, depositing ZnO on the surface of the precursor micro-ribbon; performing high-temperature calcination on the precursor micro-ribbon coated with ZnO to obtain the ZnO / BiVO4 heterogeneous micro-ribbon material. Compared with the prior art, the method uses diethylzinc to strongly react with water and generate ZnO; through changing the circulation frequency in the atomic layer deposition system, the structure and component of the ZnO / BiVO4 heterogeneous micro-ribbon are effectively controlled.

Description

technical field [0001] The invention relates to the application of an inorganic semiconductor photoelectric material in the field of photocatalysts, in particular to a high-purity ZnO / BiVO 4 The invention relates to a method for preparing a heterogeneous micro-ribbon, which belongs to the technical field of micro-ribbons. Background technique [0002] BiVO 4 It is a narrow bandgap semiconductor material with excellent performance and visible light absorption capacity. It has potential applications in photocatalytic degradation of organic pollutants, photoelectric sensitivity, photocatalytic water splitting, and photoluminescence. However, single-phase BiVO 4 Due to its short lifetime of photogenerated carriers and low quantum efficiency, its application in photocatalysis is greatly limited. Studies have shown that BiVO 4 Coupled with some semiconductors to form heterogeneous semiconductor composite materials, such as BiVO 4 After coupling with ZnO, BiVO 4 Under visible...

Claims

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Application Information

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IPC IPC(8): D01F9/08D01F11/00B01J23/22B01J35/06
CPCD01F9/08D01F11/00B01J23/002B01J23/22B01J2523/00B01J35/58B01J35/39B01J2523/27B01J2523/54B01J2523/55
Inventor 侯慧林王霖郑金桔杨为佑
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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