ZnO nano-wire array synergistically modified by nano-Ag and TiO2 and preparation method of zinc oxide nano-wire array

A technology of zinc oxide nanowires and nanowire arrays is applied in the field of preparation of dye-sensitized and quantum dot-sensitized solar cell photoanode materials, which can solve the problems of easy shedding, complicated preparation process, low specific surface area, etc., and achieves improved conversion. Efficiency, simple preparation process, enhanced light absorption effect

Inactive Publication Date: 2016-02-17
SHIHEZI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the traditional porous nano-film, the one-dimensional ZnO nanowire array has the problems of low specific surface area, low adsorption amount of photosensitizer, and low photoelectric conversion efficiency.
First of all, the preparation method is complicated by multiple spin coating and long-term light, which reduces the economic applicability.
Secondly, the array grown by this method is short, which cannot meet the light absorption length requirement of the solar cell photoanode
The "preparation method of one-dimensional zinc oxide-titanium dioxide core-shell structure composite nanowire array" mentioned in the Chinese invention patent application publication CN102723208A published on October 10, 2012, was prepared on zinc oxide nanowires by a cyclic adsorption method Titanium dioxide shell, the combination of titanium dioxide shell and zinc oxide prepared by this method is not firm, easy to fall off, affecting its effect and application

Method used

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  • ZnO nano-wire array synergistically modified by nano-Ag and TiO2 and preparation method of zinc oxide nano-wire array
  • ZnO nano-wire array synergistically modified by nano-Ag and TiO2 and preparation method of zinc oxide nano-wire array
  • ZnO nano-wire array synergistically modified by nano-Ag and TiO2 and preparation method of zinc oxide nano-wire array

Examples

Experimental program
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Effect test

Embodiment 1

[0020] a. Mix 2-methoxyethanol and ethanolamine at a volume ratio of 241:9, then add zinc nitrate dihydrate into the mixture, stir continuously for 2 hours in a water bath environment at a temperature of 60°C, and age to make a ZnO seed layer sol , wherein the mol ratio of zinc nitrate dihydrate and 2-methoxyethanol is 1:1;

[0021] b. Clean and dry the fluorine-doped tin oxide glass, spin-coat the sol obtained in step a on the surface of the fluorine-doped tin oxide glass by spin coating, set the parameters of the homogenizer: 3000rpm, 30s, spin at a temperature of 300 Bake at ℃ for 10 minutes, then raise the temperature in a muffle furnace at a rate of 5℃ / min, and anneal at a temperature of 400℃ for 10min to obtain a seed layer;

[0022] c. Dissolve zinc nitrate hexahydrate and hexamethylenetetramine in deionized water respectively, mix equal volumes to form a solution with a concentration of 0.2M; then fix the fluorine-doped tin oxide glass coated with the seed layer on the...

Embodiment 2

[0026] a. Mix 2-methoxyethanol and ethanolamine at a volume ratio of 241:9, then add zinc nitrate dihydrate into the mixture, stir continuously for 2 hours in a water bath environment at a temperature of 60°C, and age to make a ZnO seed layer sol , wherein the mol ratio of zinc nitrate dihydrate and 2-methoxyethanol is 1:1;

[0027]b. Clean and dry the fluorine-doped tin oxide glass, spin-coat the sol obtained in step a on the surface of the fluorine-doped tin oxide glass by spin coating, set the parameters of the homogenizer: 3000rpm, 30s, spin at a temperature of 300 Baking at ℃ for 10 minutes, then annealing at 400℃ for 10 minutes at a heating rate of 5℃ / min in a muffle furnace to obtain a seed layer;

[0028] c. Dissolve zinc nitrate hexahydrate and hexamethylenetetramine in deionized water respectively, mix equal volumes to form a solution with a concentration of 0.2M; then fix the fluorine-doped tin oxide glass coated with the seed layer on the mold and place Into the s...

Embodiment 3

[0032] a. Mix 2-methoxyethanol and ethanolamine at a volume ratio of 241:9, then add zinc nitrate dihydrate into the mixture, stir continuously for 2 hours in a water bath environment at a temperature of 60°C, and age to make a ZnO seed layer sol , wherein the mol ratio of zinc nitrate dihydrate and 2-methoxyethanol is 1:1;

[0033] b. Clean and dry the fluorine-doped tin oxide glass, and use the spin coating method to spin-coat the sol obtained in the step on the surface of the fluorine-doped tin oxide glass. The parameters of the homogenizer are set: 3000rpm, 30s, and the temperature is 300°C after spin coating. Bake at lower temperature for 10 minutes, then anneal at 400°C for 10 minutes at a heating rate of 5°C / min in a muffle furnace to obtain a seed layer;

[0034] c. Dissolve zinc nitrate hexahydrate and hexamethylenetetramine in deionized water respectively, mix equal volumes to form a solution with a concentration of 0.2M; then fix the fluorine-doped tin oxide glass c...

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Abstract

The invention relates to a ZnO nano-wire array synergistically modified by nano-Ag and TiO2 and a preparation method of the zinc oxide nano-wire array. The structure of the array is as follows: a ZnO nano-wire is taken as an inner core, nano-Ag is loaded on the surface of the ZnO nano-wire, a TiO2 film is modified at the outermost part of the nano-Ag, wherein the length of the ZnO nano-wire array is 10mum, the thickness of the TiO2 film is 5-10nm. The preparation method comprises the following steps: the ZnO nano-wire array is prepared by a hydro-thermal method, AgNO3 solution is taken as a precursor, nano-Ag is loaded on the surface of the ZnO nano-wire array by an illumination reduction method, then the ZnO nano-wire array is put into mixed solution of Ammonium hexafluorotitanate and boric acid, and the TiO2 film is formed on the surface of the array by an immersion method. The structure has the main purpose that the ZnO nano-wire modified by Ag inside a nanocable can be taken as an expressway for electronic transmission, and the light absorption is enhanced by utilizing the Ag surface plasmon resonance effect. The preparation method has the advantages that the cost is low, the process is controllable, and the repeatability is good, therefore, the preparation method can be applied to photo anode materials of a solar cell and can be also utilized in the photocatalysis field.

Description

technical field [0001] The present invention relates to a kind of nano silver (Ag) and titanium dioxide (TiO 2 ) synergistically modified zinc oxide (ZnO) array and a preparation method, in particular to the preparation of a dye-sensitized and quantum dot-sensitized solar cell photoanode material. Background technique [0002] Among many mesoporous electrode materials, TiO 2 The role of ZnO and ZnO semiconductor oxides is as a carrier for photosensitizer loading and electron transport, and its composition and structure can affect the adsorption of photosensitizers, the transport of photogenerated electrons, and the recombination process. The photoanode of dye and quantum dot sensitized solar cells is mainly composed of semiconductor oxide nanocrystalline particles. However, in the network-like film composed of disordered accumulation of nanoparticles, the grain boundaries between particles will hinder the transport of electrons, resulting in a relatively low electron mobil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/042
CPCH01G9/2036Y02E10/542
Inventor 侯娟赵海峰刘志勇曹海宾吴强
Owner SHIHEZI UNIVERSITY
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