Preparation method of composite nanowire array with one-dimensional ZnO(zinc oxide)-TiO2(titanium dioxide) core-shell structure

A nanowire array, titanium dioxide technology, applied in photosensitive equipment, electrolytic capacitors, photovoltaic power generation and other directions, can solve the problems of high temperature, high manufacturing cost, unfavorable promotion, etc., and achieve the effect of simple process, good repeatability and low environmental requirements.

Inactive Publication Date: 2012-10-10
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the first two methods can precisely control the thickness of the titanium dioxide layer and obtain a zinc oxide-titanium dioxide core-shell structure composite array with uniform thickness and controllable morphology, the preparation process requires high temperature and special equipment, and the manufacturing cost is high, which is not conducive to L

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  • Preparation method of composite nanowire array with one-dimensional ZnO(zinc oxide)-TiO2(titanium dioxide) core-shell structure
  • Preparation method of composite nanowire array with one-dimensional ZnO(zinc oxide)-TiO2(titanium dioxide) core-shell structure
  • Preparation method of composite nanowire array with one-dimensional ZnO(zinc oxide)-TiO2(titanium dioxide) core-shell structure

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Embodiment 1

[0020] 1) First, dissolve monoethanolamine in 20 ml of ethylene glycol methyl ether, and then add 0.001 mole of zinc acetate dihydrate to make the ratio of monoethanolamine to zinc ions 1:1; then seal the mixture Place the zinc oxide sol in a 58°C water bath and stir evenly to obtain the zinc oxide sol. After the zinc oxide sol is taken out, it is allowed to stand for 15 hours at room temperature for later use. The spin coating process is used to apply the spin coating process at 3000 revolutions / min. The sol is deposited on clean conductive glass, and then it is immediately placed in an oven at 195°C for 10 minutes, and then the substrate is placed in a muffle furnace at 450°C for 1 hour to obtain a zinc oxide seed layer;

[0021] 2) Secondly, dissolve 2.5 millimoles of zinc nitrate hexahydrate and 2.5 millimoles of hexamethylenetetramine in 100 milliliters of deionized water, and mix them to obtain a growth solution. The prepared substrate covered with a seed layer The seed cry...

Embodiment 2

[0025] 1) First, dissolve monoethanolamine in 20 ml of ethylene glycol methyl ether, and then add 0.005 mole of zinc acetate dihydrate so that the ratio of the amount of monoethanolamine to zinc ion is 1:1; then the mixture is sealed Place it in a 60℃ water bath and stir it evenly to obtain zinc oxide sol. After removing the zinc oxide sol, let it stand for 12 hours at room temperature for later use. The spin coating process is used to apply the spin coating process at 3000 revolutions / min. The sol is deposited on clean conductive glass, and then it is immediately placed in an oven at 198°C for 8 minutes, and then the substrate is placed in a muffle furnace at 470°C for 1 hour to obtain a zinc oxide seed layer;

[0026] 2) Secondly, dissolve 5 millimoles of zinc nitrate hexahydrate, 5 millimoles of hexamethylenetetramine and 0.5 millimoles of polyethyleneimine with a molecular weight of 1800 in 100 milliliters of deionized water and mix well to obtain a growth solution , The prep...

Embodiment 3

[0030] 1) First, dissolve monoethanolamine in 20 ml of ethylene glycol methyl ether, and then add 0.01 mole of zinc acetate dihydrate to make the ratio of monoethanolamine to zinc ion 1:1; then seal the mixture Place the zinc oxide sol in a 62°C water bath and stir evenly to obtain the zinc oxide sol. After the zinc oxide sol is taken out, it is allowed to stand for 18 hours at room temperature for later use. The spin coating process is used to apply the spin coating process at 3000 revolutions / min. The sol is deposited on clean conductive glass, and then it is immediately placed in an oven at 202°C for 6 minutes, and then the substrate is placed in a muffle furnace at 485°C for 0.5 hours to obtain a zinc oxide seed layer;

[0031] 2) Secondly, dissolve 3 millimoles of zinc nitrate hexahydrate, 3 millimoles of hexamethylenetetramine and 0.3 millimoles of polyethyleneimine with a molecular weight of 1800 in 100 milliliters of deionized water and mix well to obtain a growth solution...

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Abstract

A preparation method of a composite nanowire array with a one-dimensional ZnO(zinc oxide)-TiO2(titanium dioxide) core-shell structure. In the whole preparation process, a wet chemistry method is adopted. The preparation method comprises the following steps: at first, a ZnO seed layer is prepared on conductive glass in a sol-gel method, then a ZnO nanowire array is grown on the seed layer in a liquid-phase deposition method, and next a TiO2 shell layer is prepared on a ZnO nanowire array in a circulating adsorption reaction method, so as to obtain the composite nanowire array with the one-dimensional ZnO-TiO2 core-shell structure. The preparation method has the advantages that (1) compared with the other methods (such as a chemical meteorology deposition method, an atom layer deposition method and a magnetron sputtering method), the preparation method has a simple process, does not require complex equipment and severe environments, and is low in cost; (2) the preparation method can control the diameter and the length of the ZnO nanowire and the thickness of the TiO2 shell layer conveniently; and (3) the preparation method can be combined with a photoanode preparation method of a quantum dot dye-sensitized solar cell conveniently to facilitate the research of the cell performance.

Description

Technical field [0001] The invention relates to a preparation method of a core-shell structure composite nanowire array, in particular a preparation method of a one-dimensional zinc oxide-titanium dioxide core-shell structure composite nanowire array applied to the photoanode of a dye / quantum dot sensitized solar cell. Background technique [0002] Solar cells can directly convert solar cells into electrical energy, and are considered to be the most effective way to use solar energy, so they have been highly valued by countries all over the world. At present, the solar cells that have been practically used are mainly silicon-based solar cells, which have higher efficiency and better stability, but their high manufacturing cost limits their large-scale application. Therefore, in addition to improving the commercialization of low-cost and high-efficiency silicon-based solar cells, researchers are more actively exploring new types of solar cells. Among many solar cells, dye / quantum...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01G9/20
CPCY02E10/542Y02E10/549
Inventor 阙文修尹行天
Owner XI AN JIAOTONG UNIV
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