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A kind of highly stable organic lead iodide crystal material and its preparation method and application

A high-stability, crystalline material technology, applied in the growth of polycrystalline materials, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of narrow photoresponse range and inability to effectively use sunlight Energy and photocatalytic applications are limited, and achieve the effects of wide light absorption range, high crystallinity, and simple and easy-to-operate preparation process

Active Publication Date: 2021-09-03
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the currently reported materials of this type have a narrow response range to light and cannot effectively utilize solar energy, thus limiting their application in the field of photocatalysis.

Method used

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  • A kind of highly stable organic lead iodide crystal material and its preparation method and application
  • A kind of highly stable organic lead iodide crystal material and its preparation method and application
  • A kind of highly stable organic lead iodide crystal material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Material synthesis: Weigh 0.23g of lead oxide, 0.57g of disodium adipate and 0.5g of potassium iodide into a reaction kettle (20mL in volume) containing 15mL of deionized water, then add 250μL of concentrated hydrochloric acid dropwise, and stir vigorously to obtain uniform suspension; seal the autoclave and place it in an oven with a constant temperature of 180°C for 72 hours; after the reaction is completed, lower the temperature of the oven to room temperature at a rate of 5°C / hour; The product was transferred to a beaker, washed three times with deionized water and ethanol, and finally dried in a vacuum oven at 60° C. for 12 hours to obtain the material.

[0036]The properties of the material obtained in this example are yellow transparent crystals, confirmed by single crystal ray diffraction, the crystal structure of the material is as follows figure 1 shown.

[0037] Material [Pb 2 I 2 (H 2 O) 0.75 ] 2+ [ – o 2 C(CH 2 ) 4 CO 2 – ] Stability investigati...

Embodiment 2

[0064] Material synthesis: Weigh 0.23g of lead oxide, 0.475g of disodium adipate and 0.5g of potassium iodide into a reaction kettle (20mL in volume) containing 15mL of deionized water, then add 230μL of concentrated hydrochloric acid dropwise, and stir vigorously to obtain uniform suspension; seal the autoclave and place it in an oven with a constant temperature of 180°C for 72 hours; after the reaction is completed, lower the temperature of the oven to room temperature at a rate of 5°C / hour; The product was transferred to a beaker, washed three times with deionized water and ethanol, and finally dried in a vacuum oven at 60° C. for 12 hours to obtain the material.

Embodiment 3

[0066] Material synthesis: Weigh 0.23g of lead oxide, 0.76g of disodium adipate and 0.5g of potassium iodide into a reaction kettle (20mL in volume) containing 15mL of deionized water, then add 275μL of concentrated hydrochloric acid dropwise, and stir vigorously to obtain uniform suspension; seal the autoclave and place it in an oven with a constant temperature of 180°C for 72 hours; after the reaction is completed, lower the temperature of the oven to room temperature at a rate of 5°C / hour; The product was transferred to a beaker, washed three times with ethanol, and finally dried in a vacuum oven at 60° C. for 12 hours to obtain the material.

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Abstract

The invention relates to a highly stable organic lead iodide crystal material and its preparation method and application. The chemical formula of the crystal material is [Pb 2 I 2 (H 2 O) 0.75 ] 2+ [ – o 2 C(CH 2 ) 4 CO 2 – ], the crystal structure belongs to the monoclinic system, the space group is C2 / c, and [Pb 2 I 2 ] The inorganic components are in the form of two-dimensional layers, and the layers are connected by disodium adipate organic ligands. Compared with the prior art, the present invention overcomes the disadvantages of poor stability of the existing hybrid organic-inorganic perovskite materials and the difficulty of realizing photocatalytic water splitting, combined with the advantages of the present invention such as simple preparation process, it is a promising solution in the field of photocatalysis. have potential application value.

Description

technical field [0001] The invention belongs to the technical field of crystal materials, and relates to a high-stability organic lead iodide crystal material and a preparation method and application thereof. Background technique [0002] With the rapid development of society, the excessive exploitation and use of energy has caused a global energy crisis and environmental pollution. At present, building an effective catalytic system for the development of clean energy has become one of the hot issues of global concern. Among them, the photocatalytic system is currently recognized as a simple and effective method, which can convert light energy into chemical energy (H 2 and O 2 ). However, designing single-component semiconductor photocatalysts with good light energy conversion efficiency still faces great challenges. The current photocatalysts are mainly traditional inorganic or organic conjugated polymers, such as UV-responsive metal oxides or visible-light-responsive m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/54C30B7/10C25B11/087C25B11/085C25B1/04B01J31/04C01B3/04
CPCB01J31/04B01J35/004C01B3/042C25B1/04C30B7/10C30B29/54Y02E60/36
Inventor 费泓涵宋雪玲
Owner TONGJI UNIV
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