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Method for preparing zinc oxide nanowire array based on coordination chemical reaction theory

A chemical reaction and coordination technology, which is applied in zinc oxide/zinc hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of fast reaction rate, etc., and achieve the effect of regular array, simple process and high hole filling rate

Inactive Publication Date: 2010-01-13
TIANJIN UNIV
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Problems solved by technology

[0010] The coordination reaction method (or indirect precipitation method) fundamentally changes the way of transporting substances into the pores of the porous anodized alumina template, and overcomes the shortcomings of the direct deposition method that the reaction rate is too fast and cannot be controlled during the deposition process.

Method used

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  • Method for preparing zinc oxide nanowire array based on coordination chemical reaction theory
  • Method for preparing zinc oxide nanowire array based on coordination chemical reaction theory
  • Method for preparing zinc oxide nanowire array based on coordination chemical reaction theory

Examples

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Effect test

Embodiment 1

[0036] Example 1: Preparation of porous anodic aluminum oxide (PAA) template using two-time anodization

[0037] Aluminum foil with a thickness of 0.3mm and a purity of 99.999% was selected, cut into a substrate with a specification of 20mm×30mm, and the porous anodized aluminum (PAA) template was prepared through the following process steps in sequence.

[0038] (1) Annealing: Wrap and seal the cut aluminum foil with the same aluminum foil. -3 Pa, annealed at 500°C for 5 hours, and then cooled to room temperature with the furnace.

[0039] (2) Degreasing: put the annealed aluminum foil in acetone and wash it for 20 minutes, take it out, rinse it with distilled water for more than 3 times, blow dry, then put it in ethanol and wash it for more than 3 times, and blow dry.

[0040] (3) Electrolytic polishing: prepare ethanol and perchloric acid electrolyte with a volume ratio of 4:1, put the aluminum foil treated by the above two steps as the anode into the electrolytic cell, an...

Embodiment 2

[0046] Embodiment 2: the preparation of zinc oxide nanowire array

[0047] (1) Precursor solution—preparation of zinc ammonia complex solution. At room temperature, use a dropper to fill 10 mL of Zn(NO 3 ) 2 ·6H 2 In the beaker of the O solution, add the newly prepared ammonia water with a mass concentration of 2% dropwise, and shake the beaker while adding dropwise, to promote the solution mixing and coordination reaction, until the solution in the beaker is colorless, clear, If it is transparent, immediately stop adding ammonia water; let stand for 60 minutes, then the precursor solution - zinc ammonia complex solution is made. The precursor solution should be prepared and used immediately.

[0048] (2) Synthesis of precursor - zinc hydroxide precipitate. Dip a porous anodized aluminum (PAA) template (see Example 1) with a suitable size into the freshly prepared zinc-ammonia complex solution (precursor), vibrate with ultrasonic waves for 10 minutes, and then let it stan...

Embodiment 3

[0050] Example 3: Characterization of ZnO / PAA assemblies

[0051] (1) FE-SEM analysis

[0052] For the porous anodized aluminum template assembled with zinc oxide nanowires (see Example 2, hereinafter referred to as ZnO / PAA assembly), the cross-section was taken for FE-SEM observation. A Nanosem 430 thermal field emission scanning electron microscope manufactured by FEI Company of the United States was used. The resulting shape is as Figure 4 As shown, we can see from the figure that most of the pores of the alumina template are filled with zinc oxide nanowires. Depend on Figure 4 (a) It can be seen that the ZnO nanowires maintain the shape of the original alumina template channels and grow, and the thickness of the nanowires is uniform. Figure 4 (b) is the cross-section and surface diagram of the zinc oxide nanowires. It can be seen from the figure that the surface of the nanowires grows very neatly. Figure 4 (c) is Figure 4 Magnification of (b). Some of the nanow...

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Abstract

A chemical preparation method (coordination reaction method) for preparing ZnO nanowire array which is based on coordination chemical reaction theory and used in porous anode aluminum oxide template is disclosed. The reactant of the method is dissoluble zinc salt added with aqueous ammonia, but different from the direct deposition method, the product of the preceding reaction Zn(OH)2 is not directly deposited on the pore channel of the aluminum oxide template but is subject to coordination reaction to be precursor---zinc ammonium coordinate, and crystallizing ions in the form of precursor is conveyed into the pore channel of the aluminum oxide template; the precursor is subject to hydrolysis reaction and is converted into Zn(OH)2 in the pore channel of the aluminum oxide template to be deposited; then, Zn(OH)2 is baked to be the target product ZnO in the end. The ZnO nanowire prepared by the method of the invention has high pore channel filling rate and continuous, compact and filled line, and when using high quality aluminum oxide template, the ZnO nanowire array is regular and uniform.

Description

【Technical field】: [0001] The invention belongs to the technical field of making micro-nano materials, in particular to the preparation of micro-nano materials applied to optoelectronic devices. 【Background technique】: [0002] ZnO has high chemical stability and large forbidden band width (E g =3.4eV) and high exciton binding energy (60meV), and has unique electrical, luminescent and photochemical properties. All have broad application prospects, and thus have received great attention. In recent years, the research on the assembly of ZnO nanowire arrays has been increasing, and new micro-nano optoelectronic devices such as nanogenerators and nanolasers have been produced. [1] . In the current field of research on the preparation of ZnO nanowire arrays, an important research direction is that by injecting ZnO into porous anodic aluminum (Porous Anodic Alumina, abbreviated as PAA, in some literature, it is also written as Anodic Aluminum Oxide, Abbreviated as AAO, such as...

Claims

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Application Information

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IPC IPC(8): C01G9/02B82B3/00
Inventor 阮永丰张灵翠王丹丽杨红波李文润房东玉
Owner TIANJIN UNIV
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