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Method for preparing ZnO/I-doped ZnO core/shell structure nanowire array

A nanowire array and shell structure technology, applied in the direction of final product manufacturing, sustainable manufacturing/processing, climate sustainability, etc., can solve the problems of unfavorable electron transport at grain boundaries, increase the absorption range, reduce recombination, and improve adsorption volume effect

Active Publication Date: 2015-08-19
SHANDONG ANWEIXIAN BIOLOGICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, we found in our research that by doping non-metallic ions in ZnO, the prepared products are usually polycrystalline and have a sheet-like structure, and the existence of a large number of grain boundaries in this structure is not conducive to the transport of electrons

Method used

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Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1: Prepare ZnO / I doped ZnO core / shell structure nanowire array according to the following steps:

[0026] Step (1): Spin-coat an ethanol solution containing 0.3M ethanolamine and 0.3M zinc acetate on the cleaned FTO conductive glass substrate, dry the film obtained by spin coating, and place it in a 500 o Annealed in the muffle furnace of C for 30 minutes, obtained the conductive glass with ZnO seed layer;

[0027] Step (2): Put the conductive glass with the seed layer prepared in the previous step into an aqueous solution consisting of 25mM zinc nitrate hexahydrate, 12.5mM hexamethylenetetramine, 1.2mM polyethyleneimine and 1.2mL ammonia water, at 88 o Hydrothermal growth under C conditions for 8 hours; the scanning electron microscope image of the ZnO nanowire array prepared in this step is as follows figure 1 As shown, its EDX spectrum is as figure 2 It can be seen from the two figures that the prepared product is an ordered nanowire array, which is ma...

Embodiment 2

[0029] Embodiment 2: Prepare ZnO / I doped ZnO core / shell structure nanowire array according to the following steps:

[0030] Step (1): Spin-coat an ethanol solution containing 0.45M ethanolamine and 0.45M zinc acetate on the cleaned FTO conductive glass substrate, dry the film obtained by spin coating, and place it in a 500 o Annealed in the muffle furnace of C for 45 minutes, obtained the conductive glass with ZnO seed layer;

[0031] Step (2): Put the conductive glass with the seed layer prepared in the previous step into an aqueous solution consisting of 50mM zinc nitrate hexahydrate, 25mM hexamethylenetetramine, 1.35mM polyethyleneimine and 1.35mL ammonia water. 88 o 11.5 hours of hydrothermal growth under C conditions;

[0032] Step (3): Put the substrate with ZnO nanowires on the surface in a solution containing 0.0024M iodic acid, 0.06M zinc acetate and 0.03M hexamethylenetetramine in a blast drying oven at 62 o Heating in C environment for 13.5 hours, ZnO / I doped ZnO...

Embodiment 3

[0033] Embodiment 3: Prepare ZnO / I doped ZnO core / shell structure nanowire array according to the following steps:

[0034] Step (1): Spin-coat an ethanol solution containing 0.6M ethanolamine and 0.6M zinc acetate on the cleaned FTO conductive glass substrate, dry the film obtained by spin coating, and place it in a 500 o Annealed in the muffle furnace of C for 60 minutes to obtain a conductive glass with a ZnO seed layer;

[0035] Step (2): Put the conductive glass with the seed layer prepared in the previous step into an aqueous solution consisting of 75mM zinc nitrate hexahydrate, 37.5mM hexamethylenetetramine, 1.5mM polyethyleneimine and 1.5mL ammonia water, at 88 o Hydrothermal growth under C conditions for 15 hours;

[0036] Step (3): Put the substrate with ZnO nanowires on the surface in a solution containing 0.0036M iodic acid, 0.06M zinc acetate and 0.03M hexamethylenetetramine in a blast drying oven at 62 o C environment was heated for 15 hours to obtain a ZnO / I ...

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Abstract

The invention discloses a method for preparing a ZnO / I-doped ZnO core / shell structure nanowire array. First a hydrothermal method is adopted to prepare a ZnO nanowire array on the surface of transparent conductive glass; then the ZnO nanowire array is put in a mixed solution of methyl alcohol containing iodic acid, zinc acetate and hexamethylene tetramine and water to prepare the ZnO / I-doped ZnO core / shell structure nanowire array. The I-doped ZnO shell layer prepared by the method provided by the invention can reduce the forbidden band width of ZnO, causing a light absorption range of ZnO to expand towards a visible light area, and the prepared composite structure can effectively improve application of a ZnO nanostructure to fields of solar cells, photocatalysis, photoelectric conversion, thermoelectric conversion and the like.

Description

technical field [0001] The invention relates to a preparation method of a ZnO-based composite material, in particular to an inorganic composite nanomaterial with photoelectric, photocatalytic and thermoelectric conversion properties, and in particular to a preparation method of a ZnO / I-doped ZnO core / shell structure nanowire array. Background technique [0002] With the increasingly serious problem of environmental pollution and the aggravation of the energy crisis, how to control environmental pollution and seek new alternative energy has become the focus of attention all over the world. As a clean energy source, solar energy provides an optimal way to solve the above two problems. Using photocatalytic technology can degrade organic pollutants; using photoelectric conversion and thermoelectric conversion technology can solve the problem of energy shortage. According to reports, the sun radiates energy to the earth for one hour (4.3×10 20 J) than the energy consumed by the...

Claims

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Application Information

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IPC IPC(8): H01L31/18
CPCH01L31/1884Y02E10/50Y02P70/50
Inventor 朱雨富周广宏刘磊林岳宾
Owner SHANDONG ANWEIXIAN BIOLOGICAL TECH CO LTD
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