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Method for dissolving and extracting lead iodide by using polyethylene glycol type eutectic solvent

A deep eutectic solvent and polyethylene glycol-based technology, applied in chemical instruments and methods, lead halide, process efficiency improvement, etc., can solve problems such as difficult separation of lead iodide for reuse, toxicity, explosion, etc. , to achieve the effect of easy operation, easy operation and simple method

Active Publication Date: 2020-09-18
LANGFANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dimethylformamide is a carcinogen, flammable, explosive and toxic at high temperature, it is difficult to separate lead iodide for reuse

Method used

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  • Method for dissolving and extracting lead iodide by using polyethylene glycol type eutectic solvent
  • Method for dissolving and extracting lead iodide by using polyethylene glycol type eutectic solvent
  • Method for dissolving and extracting lead iodide by using polyethylene glycol type eutectic solvent

Examples

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Embodiment 1

[0030] The difference between this embodiment and the above-mentioned embodiment is: a kind of method utilizing polyethylene glycol type deep eutectic solvent to dissolve and extract lead iodide may further comprise the steps:

[0031] 1) Polyethylene glycol 200 and thiourea are mixed at a molar ratio of 6:1 at 35 degrees Celsius to form a polyethylene glycol type deep eutectic solvent;

[0032] 2) Weigh part of the deep eutectic solvent prepared in step 1), add the hybrid perovskite solar cell components containing lead iodide and continue stirring for a period of time until the hybrid perovskite solar cell group containing lead iodide The deep eutectic solvent of part reaches saturation; The temperature used for dissolving lead iodide is 20 degrees centigrade; The time used for dissolving lead iodide is 1 hour;

[0033] 3) centrifuging the deep eutectic solvent containing the saturated hybrid perovskite solar cell components prepared in step 2), the centrifugation rate is 20...

Embodiment 2

[0037] The difference between this embodiment and the above-mentioned embodiment is: a kind of method utilizing polyethylene glycol type deep eutectic solvent to dissolve and extract lead iodide may further comprise the steps:

[0038] 1) Polyethylene glycol 200 and choline bromide are mixed at a molar ratio of 1:1 at 35 degrees Celsius to form a polyethylene glycol type deep eutectic solvent;

[0039] 2) Weigh part of the deep eutectic solvent prepared in step 1), add the hybrid perovskite solar cell components containing lead iodide and continue stirring for a period of time until the hybrid perovskite solar cell group containing lead iodide The deep eutectic solvent of part reaches saturation; The temperature used for dissolving lead iodide is 90 degrees centigrade; The time used for dissolving lead iodide is 2 hours;

[0040] 3) centrifuging the deep eutectic solvent containing the saturated hybrid perovskite solar cell components prepared in step 2), the centrifugation ra...

Embodiment 3

[0044]The difference between this embodiment and the above-mentioned embodiment is: a kind of method utilizing polyethylene glycol type deep eutectic solvent to dissolve and extract lead iodide may further comprise the steps:

[0045] 1) Polyethylene glycol 200 and choline chloride are mixed at a molar ratio of 4:1 to form a polyethylene glycol type deep eutectic solvent at 35 degrees Celsius;

[0046] 2) Weigh part of the deep eutectic solvent prepared in step 1), add the hybrid perovskite solar cell components containing lead iodide and continue stirring for a period of time until the hybrid perovskite solar cell group containing lead iodide The deep eutectic solvent of part reaches saturation; The temperature used for dissolving lead iodide is 55 degrees centigrade; The time used for dissolving lead iodide is 4 hours;

[0047] 3) centrifuging the deep eutectic solvent prepared in step 2); during the centrifugation of the deep eutectic solvent, centrifuge at a rate of 4000 r...

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Abstract

The invention discloses a method for dissolving and extracting lead iodide by using a polyethylene glycol type eutectic solvent. The method comprises the following steps: 1) stirring and mixing polyethylene glycol 200 and a hydrogen bond donor according to a molar ratio to form the polyethylene glycol type eutectic solvent; 2) weighing a part of the eutectic solvent prepared in the step 1), addinga hybrid perovskite solar cell component containing lead iodide, and continuously stirring for a period of time until the eutectic solvent of the hybrid perovskite solar cell component containing lead iodide is saturated; 3) carrying out centrifugation on the eutectic solvent prepared in the step 2); and 4) taking a part of supernatant of the eutectic solvent of the centrifuged hybrid perovskitesolar cell component containing lead iodide, and detecting the concentration of lead iodide by adopting an ultraviolet-visible absorption spectrometer and taking dimethyl formamide as a background. The method has the advantages that the defects in the prior art can be overcome, and the method is simple, easy to operate, cheap in raw materials and environmentally friendly.

Description

technical field [0001] The invention relates to a method for dissolving and extracting lead iodide by using a polyethylene glycol type deep eutectic solvent, and belongs to the field of recycling and processing waste solar cells. Background technique [0002] In recent years, with the continuous development of science and technology, more and more emerging technologies have been continuously improved, and some heavy metals have been applied to various products. Although it has promoted scientific and technological progress, it has also brought a series of environmental problems, such as heavy metal residues that are seriously destructive to soil and water quality. So some methods of recycling heavy metals are very important. [0003] The depletion of fossil energy has resulted in an increasing demand for new energy, solar energy is a prominent representative. Emerging perovskite solar cells have received a lot of attention and have been widely used. Prototypes of componen...

Claims

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Application Information

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IPC IPC(8): C01G21/16B09B3/00
CPCC01G21/16C01P2002/84B09B3/80Y02W30/20
Inventor 陈钰卢艳红魏磊迟新悦
Owner LANGFANG NORMAL UNIV
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