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Preparation method and application of pine cone-like ZnO nanoparticles

A technology of nano-microspheres and pine cones, which is applied in the field of ZnO nanometers, can solve the problems of complex preparation process, insignificant advantages of electrode materials, and excessive macroscopic size, and achieve the effects of uniform distribution of pores, wide application range, and controllable size

Active Publication Date: 2018-11-16
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Zhang et al. (Ind.Eng.Chem.Res., 50, 13355, 2011) used a microporous membrane separation device to prepare ZnO microspheres with a size of about 10 μm self-assembled from sheet-layer nano-ZnO particles. There are also many level structure, but its macroscopic size is too large and the preparation process is complicated, so the advantages of being used as photoelectric conversion electrode materials are not obvious

Method used

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  • Preparation method and application of pine cone-like ZnO nanoparticles
  • Preparation method and application of pine cone-like ZnO nanoparticles
  • Preparation method and application of pine cone-like ZnO nanoparticles

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Experimental program
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Effect test

Embodiment 1

[0028] A preparation method of pinecone-like ZnO nanometer microspheres, comprising the following steps:

[0029] 1), the preparation of the precursor mixed solution, polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer, lithium chloride (LiCl), zinc acetate according to the mass ratio of 0.5:20: Add the ratio of 100 to 10mL ethylene glycol, and magnetically stir at 60°C for 60min to obtain a clear precursor mixed solution;

[0030] 2) For the preparation of the precursor film, place the substrate on the heating plate and heat it to 200°C, use a spray gun to evenly spray the precursor mixed solution prepared in step 1) onto the substrate in the form of spray, B2 The alcohol evaporates quickly, and only the precursor film remains on the substrate. The pressure of the spray gun is 5MPa, and the spray is 30s;

[0031] 3) For the preparation of pinecone-like ZnO nanospheres, transfer the precursor film prepared in step 2) to a box-type annealing furnace, s...

Embodiment 2

[0034] A preparation method of pinecone-like ZnO nanometer microspheres, comprising the following steps:

[0035] 1), the preparation of the precursor mixed solution, polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer, lithium chloride (LiCl), zinc acetate according to the mass ratio of 0.5:25: Add the ratio of 100 to 15mL ethylene glycol, and magnetically stir at 80°C for 60min to obtain a clear precursor mixed solution;

[0036] 2) For the preparation of the precursor film, place the substrate on the heating plate and heat it to 200°C, use a spray gun to evenly spray the precursor mixed solution prepared in step 1) onto the substrate in the form of spray, B2 The alcohol evaporates quickly, and only the precursor film remains on the substrate. The pressure of the spray gun is 5MPa, and the spray is 60s;

[0037] 3) For the preparation of pinecone-like ZnO nanospheres, the precursor film prepared in step 2) is transferred to a box-type annealing furn...

Embodiment 3

[0040] Pinecone-like Li-doped ZnO nanospheres applied to photodetectors

[0041] Continue to epitaxially grow Au electrodes on the pinecone-like Li-doped ZnO nano-microspheres prepared in Example 1, thereby preparing a photodetector, specifically: using a mask plate and an electron beam to evaporate the metal Au electrode, and annealing Forming ohmic contacts and Schottky junctions, the photodetector includes pinecone-like Li-doped ZnO nanospheres and metal Au electrodes, and its structure is as follows Figure 4 As shown, the prepared pinecone-like Li-doped ZnO nanosphere photodetector has a dark current of only 31.2pA under 1V bias, and the maximum value of the device reaches 0.89A / W under 1V bias .

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Abstract

The invention provides a preparation method and application of pine cone-like ZnO nanoparticles. The preparation method comprises the following steps: 1) preparing a precursor mixed solution by usingzinc acetate, a pore forming agent and a dopant; 2) preparing a precursor film by using the precursor mixed solution; 3) controlling different temperature rise rates, preparing the pine cone-like ZnOnanoparticles. The preparation method has the advantages of mature preparation equipment, simple technology and convenience in scale production. Different reaction temperatures in a preparation process are accurately controlled, zinc acetate, the pore forming agent and the dopant are decomposed into water and carbon dioxide, and the water and carbon dioxide are separated from the nanoparticles toassist in forming pore channels; C1 ions is separated from LiCl in a gas form by adopting the dopant so as to assist in forming more pore channels. The prepared nanoparticles have the advantages of controllable size and evenly distributed pore channels.. The pine cone-like Li-doped ZnO nanoparticles prepared by the preparation method have a wide applicable range and can be applied to the fields ofcatalytic degradation, photoelectric detectors, air-sensitive detectors and the like to perform an active function.

Description

technical field [0001] The invention relates to the technical field of ZnO nanometers, in particular to a method for preparing pinecone-like ZnO nanometer microspheres and an application thereof. Background technique [0002] Zinc oxide (ZnO) is a typical third-generation semiconductor material. Since the ZnO crystal has a bandgap width as high as 3.37eV at room temperature and an exciton binding energy as high as 60meV, it has strong free exciton transition luminescence in the ultraviolet band, and has chemical stability, near-ultraviolet emission, and biological non-toxicity. It has unique advantages and potential application prospects in the fields of photocatalysis, photoelectricity, photovoltaics and sensors. [0003] A very important research direction of ZnO materials is ZnO nanomaterials, such as ZnO nanodots, ZnO nanospheres, ZnO nanocolumns, ZnO nanoflowers and so on. ZnO nanomaterials have outstanding advantages such as large specific surface area, quantum effec...

Claims

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Application Information

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IPC IPC(8): C01G9/02B82Y30/00G01D5/26G01N21/00B01J23/06
CPCG01D5/26G01N21/00B82Y30/00C01G9/02B01J23/06C01P2004/62C01P2004/03C01P2002/72B01J35/39
Inventor 杨为家何鑫陈梅刘俊杰刘铭全刘艳怡王诺媛刘均炎梁萍陈毅湛
Owner WUYI UNIV
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