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Controlled synthesis method for PbI2 micro-nano structure

A synthesis method and micro-nano structure technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., to achieve the effects of low energy consumption, simple operation, and low equipment requirements

Inactive Publication Date: 2017-06-09
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recently, many physical and chemical methods have been used to synthesize micro- and nanostructured PbI 2 The research has made progress, including colloidal method, sol-gel method, reverse micellar method and gas phase decomposition and hydrothermal method, etc., but there is no method that can obtain two kinds of morphology PbI at the same time simply and efficiently. 2 micro-nanostructure

Method used

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  • Controlled synthesis method for PbI2 micro-nano structure
  • Controlled synthesis method for PbI2 micro-nano structure
  • Controlled synthesis method for PbI2 micro-nano structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] a PbI 2 The control synthesis method of micro-nano structure, its specific method is:

[0026] a. Prepare the solution

[0027] At 25°C, weigh 0.10 g of PbI 2 powder, it was completely dissolved in 15mL of tetrahydrofuran, and stirred;

[0028] b. Sonication and Stirring

[0029] The solution was sonicated for 10 minutes, then stirred for an additional 3 hours, and allowed to stand;

[0030] c. Isolation and Preparation

[0031] After standing still for 24 hours, separate the upper layer solution and the lower layer precipitation, and use a dropper to take an appropriate solution on a clean silicon chip, and obtain PbI after drying. 2 nanosheets; at the same time, the lower precipitate was filtered and dried to obtain PbI 2 Micron wire.

[0032] figure 1 It is the PbI obtained in Example 1 of the present invention 2 Scanned photographs (SEM) of the nanosheets, from figure 1 It can be seen that the obtained product has a sheet-like structure with a width of abo...

Embodiment 2

[0042] a PbI 2 The control synthesis method of micro-nano structure, its specific method is:

[0043] a. Prepare the solution

[0044] At 25°C, weigh 0.15g of PbI 2 powder, completely dissolve it in 20mL of tetrahydrofuran, and stir;

[0045] b. Sonication and Stirring

[0046] The solution was sonicated for 10 minutes, then continued to stir for 3 hours, and then allowed to stand;

[0047] c. Isolation and Preparation

[0048] After standing still for 24 hours, separate the upper layer solution and the lower layer precipitation, and use a dropper to take an appropriate solution on a clean silicon chip, and obtain PbI after drying. 2 nanosheets; at the same time, the lower precipitate was filtered and dried to obtain PbI 2 Micron wire.

[0049] Figure 3a It is the PbI obtained in Example 2 of the present invention 2 Scanned photographs (SEM) of the nanosheets, from Figure 3aIt can be seen that the obtained product has a sheet-like structure with a width of 300-500 ...

Embodiment 3

[0060] a PbI 2 The control synthesis method of micro-nano structure, its specific method is:

[0061] a. Prepare the solution

[0062] At 25°C, weigh 0.13g of PbI 2 powder, it was completely dissolved in 15mL of tetrahydrofuran, and stirred;

[0063] b. Sonication and Stirring

[0064] The solution was sonicated for 10 minutes, then stirred for an additional 3 hours, and allowed to stand;

[0065] c. Isolation and Preparation

[0066] After standing still for 24 hours, separate the upper layer solution and the lower layer precipitation, and use a dropper to take an appropriate solution on a clean silicon chip, and obtain PbI after drying. 2 nanosheets; at the same time, the lower precipitate was filtered and dried to obtain PbI 2 Micron wire.

[0067] Figure 5a Be the PbI that the embodiment of the present invention three obtains The scanning photo (SEM) of nanosheet, by Figure 5a It can be seen that the product is a nanosheet with a wide size distribution, ranging ...

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Abstract

The invention provides a controlled synthesis method for a PbI2 micro-nano structure. The finally obtained PbI2 is high in purity and definite in appearance characteristic, and obtained PbI2 micowires are uniform in size and have the diameters of about 1 [mu]m. The controlled synthesis method does not need complicated equipment or raw materials, is simple and quick in operation, and low in energy consumption, and can be used for obtaining PbI2 nanosheets and the PbI2 microwires at the same time.

Description

technical field [0001] The present invention relates to a kind of PbI 2 Controlled synthesis of micro-nanostructures. Background technique [0002] The performance of nanomaterials is not only related to chemical composition, but also depends on their own structure, including phase state, morphology, dimension, size and size distribution. Currently, controlling the growth of anisotropic inorganic materials is the most challenging problem facing materials scientists. In the past two decades, nanomaterials with various structures have been successfully prepared through different regulation methods and have been extensively studied. [0003] Lead iodide (PbI 2 ) is a wide bandgap P-type semiconductor with direct transition, Eg=2.3~2.55ev, has high molecular weight, excellent physical and chemical properties and photoelectric properties, and is considered to be a good optoelectronic material, which can be used to make photoconductive, Optoelectronic devices such as photovolt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G21/16B82Y30/00B82Y40/00
CPCC01G21/16C01P2002/80C01P2004/03C01P2004/16C01P2004/62C01P2006/80
Inventor 杨峰袁玲赵勇
Owner SOUTHWEST JIAOTONG UNIV
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