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SnO2-EDTA amide compound colloidal dispersion liquid and preparation method thereof

An amide compound, colloidal dispersion technology, applied in chemical instruments and methods, colloidal chemistry, colloidal chemistry and other directions, can solve the problems of affecting the surface and interface catalytic performance of electron mobility, no effective means of improvement, affecting the photoelectric conversion efficiency of solar cells, etc. , to achieve the effect of good surface charge transport, controllable degree of agglomeration and rapid reaction

Active Publication Date: 2021-05-28
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, for SnO prepared at low temperature 2 Material, its surface interface contains a large number of oxygen defects, which seriously affects the catalytic performance and electron mobility of its surface interface
For example, when SnO 2 When the material is used as the electron transport layer of perovskite solar cells, the oxygen vacancies on the surface will become recombination centers during the charge transport process, which seriously affects the photoelectric conversion efficiency of solar cells.
SnO 2 The energy band regulation and surface functionalization of semiconductor materials are also important technical means. By changing the semiconductor energy band structure and surface characteristics, it can be applied to different fields, but there has been no effective means of improvement.

Method used

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  • SnO2-EDTA amide compound colloidal dispersion liquid and preparation method thereof
  • SnO2-EDTA amide compound colloidal dispersion liquid and preparation method thereof
  • SnO2-EDTA amide compound colloidal dispersion liquid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh 1.00 g of ethylenediaminetetraacetic acid (EDTA) powder and dissolve it in 20 mL of dilute ammonia solution to obtain EDTA ammonia solution. Dilute ammonia solution is prepared from concentrated ammonia water and deionized water at a volume ratio of 1:9. 4mLSnO 2After mixing the colloidal dispersion with 19.5mL of deionized water, add 0.5mL of EDTA ammonia solution, stir evenly, and put it into the refrigerator freezer for 20min. After taking it out from the refrigerator, the solution was returned to room temperature to obtain SnO 2 -EDTA amide compound colloidal dispersion liquid, the aggregate size is 2nm-30nm.

Embodiment 2

[0039] Weigh 1.00 g of ethylenediaminetetraacetic acid (EDTA) powder and dissolve it in 20 mL of dilute ammonia solution to obtain EDTA ammonia solution. Dilute ammonia solution is prepared from concentrated ammonia water and deionized water at a volume ratio of 1:9. 4mLSnO 2 After the colloidal dispersion was mixed with 19.0mL deionized water, 1.0mL EDTA ammonia solution was added, stirred evenly, and put into the refrigerator freezer for 20min. After taking it out from the refrigerator, the solution was returned to room temperature to obtain SnO 2 -EDTA amide compound colloidal dispersion liquid, the aggregate size is 5nm-60nm.

Embodiment 3

[0041] Weigh 1.00 g of ethylenediaminetetraacetic acid (EDTA) powder and dissolve it in 20 mL of dilute ammonia solution to obtain EDTA ammonia solution. Dilute ammonia solution is prepared from concentrated ammonia water and deionized water at a volume ratio of 1:9. 4mLSnO 2 After the colloidal dispersion was mixed with 17.5mL deionized water, 2.5mL EDTA ammonia solution was added, stirred evenly, and then put into the refrigerator freezer for 20min. After taking it out from the refrigerator, the solution was returned to room temperature to obtain SnO 2 -EDTA amide compound colloidal dispersion liquid, the aggregate size is 10nm-200nm.

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Abstract

The invention discloses a SnO2-EDTA amide compound colloidal dispersion liquid and a preparation method thereof, wherein the method comprises the steps: adding a dilute ammonia water solution of ethylenediamine tetraacetic acid into a diluent of a SnO2 nanoparticle dispersion liquid to prepare the nano SnO2-EDTA amide compound colloidal dispersion liquid. Compared with a SnO2 material, the SnO2-EDTA amide compound prepared by the preparation method disclosed by the invention has a functionalized surface and fewer surface oxygen defects, and the semiconductor energy band structure and the size of the nanocluster of the SnO2-EDTA amide compound can be adjusted. And the preparation method has the advantages of cheap raw materials, no need of heating and other conditions, rapid reaction and high yield, and is suitable for large-scale application in actual production.

Description

technical field [0001] The invention belongs to SnO 2 The technical field of material preparation, in particular to a kind of SnO 2 - EDTA amide compound colloidal dispersion and its preparation method. Background technique [0002] SnO 2 The chemical stability and thermal stability of the material are very good, non-toxic, harmless and environmentally friendly. In addition, due to its high permeability and high electron mobility in the visible light region, it can be widely used in catalytic materials, electrode materials, thin film materials, ceramic materials, photoelectric materials and solar cell materials. And because of its special property of low temperature preparation, the material can also be applied in flexible devices. [0003] However, for SnO prepared at low temperature 2 Materials, the surface interface contains a large number of oxygen vacancies, which seriously affect the catalytic performance and electron mobility of the surface interface. For exampl...

Claims

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Application Information

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IPC IPC(8): B01J13/00H01L51/46H01L51/42B82Y30/00B82Y40/00C01G19/02
CPCB01J13/00B82Y30/00B82Y40/00C01G19/02H10K85/00H10K30/15Y02P70/50
Inventor 刘钰旻汪少夫江云
Owner JIANGHAN UNIVERSITY