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Preparation method of Bi3O4Br/CsPbBr3 composite material

A composite material, 3·5H2O technology, applied in separation methods, chemical instruments and methods, carbon monoxide, etc., can solve problems such as insufficient performance, good catalytic performance, and low cost

Active Publication Date: 2021-08-31
HANGZHOU NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention is in order to overcome CsPbBr 3 Photocatalytic reduction of CO 2 Insufficient performance problem, providing a Bi 3 o 4 Br / CsPbBr 3 The preparation method of composite materials, by regulating the Bi 3 o 4 Br and CsPbBr 3 The molar ratio of the photocatalytic reduction of CO with high efficiency 2 Catalyst with simple steps, low cost and good catalytic performance

Method used

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  • Preparation method of Bi3O4Br/CsPbBr3 composite material
  • Preparation method of Bi3O4Br/CsPbBr3 composite material
  • Preparation method of Bi3O4Br/CsPbBr3 composite material

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Embodiment 1

[0025] A Bi 3 o 4 Br / CsPbBr 3 The preparation method of composite material, comprises the following steps:

[0026] (1) Preparation of Bi 3 o 4 Br nanosheets: 2mmol of Bi(NO 3 ) 3 ·5H 2 Dissolve O in 10 mL of ethylene glycol to form solution 1, dissolve 2 mmol of KBr in 10 mL of water to form solution 2, add solution 2 to solution 1 at a stirring speed of 200 rpm, and then add 5 mL of ammonia water to form a white suspension . The white suspension was reacted in a 50mL autoclave at 160°C for 12h to obtain Solution 3; Wash Solution 3 with deionized water and absolute ethanol three times each, centrifuge at 5000rpm for 5min to collect the precipitate, and dry it in vacuum at 60°C for 12h get Bi 3 o 4 Br nanosheets.

[0027](2) Preparation of cesium oleate reaction precursor: 2.5mmol CsCO 3 and 2.5mL oleic acid were added to a flask containing 40mL octadecene, and N 2 Protected, heated in an oil bath at 120°C for 1 hour, raised the temperature to 150°C within 0.5 hou...

Embodiment 2

[0031] A Bi 3 o 4 Br / CsPbBr 3 The preparation method of composite material, comprises the following steps:

[0032] (1) Preparation of Bi 3 o 4 Br nanosheets: 2mmol of Bi(NO 3 ) 3 ·5H 2 Dissolve O in 10 mL of ethylene glycol to form solution 1, dissolve 2 mmol of KBr in 10 mL of water to form solution 2, add solution 2 to solution 1 at a stirring speed of 200 rpm, and then add 5 mL of ammonia water to form a white suspension . The white suspension was reacted in a 50mL autoclave at 160°C for 12h to obtain Solution 3; Wash Solution 3 with deionized water and absolute ethanol three times each, centrifuge at 5000rpm for 5min to collect the precipitate, and dry it in vacuum at 60°C for 12h get Bi 3 o 4 Br nanosheets.

[0033] (2) Preparation of cesium oleate reaction precursor: 2.5mmol CsCO 3 and 2.5mL oleic acid were added to a flask containing 40mL octadecene, and N 2 Protected, heated in an oil bath at 120°C for 1 hour, raised the temperature to 150°C within 0.5 ho...

Embodiment 3

[0037] A Bi 3 o 4 Br / CsPbBr 3 The preparation method of composite material, comprises the following steps:

[0038] (1) Preparation of Bi 3 o 4 Br nanosheets: 2mmol of Bi(NO 3 ) 3 ·5H 2 Dissolve O in 10 mL of ethylene glycol to form solution 1, dissolve 2 mmol of KBr in 10 mL of water to form solution 2, add solution 2 to solution 1 at a stirring speed of 200 rpm, and then add 5 mL of ammonia water to form a white suspension . The white suspension was reacted in a 50mL autoclave at 160°C for 12h to obtain Solution 3; Wash Solution 3 with deionized water and absolute ethanol three times each, centrifuge at 5000rpm for 5min to collect the precipitate, and dry it in vacuum at 60°C for 12h get Bi 3 o 4 Br nanosheets.

[0039] (2) Preparation of cesium oleate reaction precursor: 2.5mmol CsCO 3 and 2.5mL oleic acid were added to a flask containing 40mL octadecene, and N 2 Protected, heated in an oil bath at 120°C for 1 hour, raised the temperature to 150°C within 0.5 ho...

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Abstract

The invention relates to the field of functional nano materials, and provides a preparation method of a Bi3O4Br / CsPbBr3 composite material aiming at the problem of insufficient performance of CsPbBr3 in photocatalytic reduction of CO2, and the preparation method comprises the following steps: (1) mixing a Bi(NO3)3.5H2O solution and a KBr solution, adding ammonia water, conducting reacting at 150-180 DEG C for 10-14 hours, and conducting post-processing to obtain a Bi3O4Br nanosheet; and (2) adding the Bi3O4Br prepared in the step (1), PbBr2, oleylamine and oleic acid into octadecene, conducting heating for 2-3 hours, injecting a cesium oleate reaction precursor, conducting reacting for 3-10 seconds, and performing post-treatment to obtain the Bi3O4Br / CsPbBr3 composite material. The high-efficiency CO2 photocatalytic reduction catalyst is obtained by regulating and controlling the molar ratio of Bi3O4Br to CsPbBr3, the steps are simple, the cost is low, and the catalytic performance is good.

Description

technical field [0001] The invention relates to the field of functional nanomaterials, in particular to a Bi 3 o 4 Br / CsPbBr 3 Methods of preparation of composite materials. Background technique [0002] With the development of modern industrialization, more and more fossil fuels are burned and utilized, accompanied by problems of energy shortage, environmental pollution and greenhouse effect. Human beings urgently need to find new clean energy as an alternative. my country's energy demand is increasing day by day, but there are still big problems in the energy structure. Taking 2020 as an example, my country's energy structure is dominated by raw coal, accounting for 68.8% of all energy used, crude oil accounts for 6.69%, and the sum of natural gas, hydropower, nuclear power, and wind power accounts for only 24.3%. Therefore, increasing the output of clean energy can indirectly reduce the dependence on non-renewable fossil fuels and get rid of the energy crisis. CO 2 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/135C01B32/40C07C1/12B01D53/86B01D53/62C07C9/04
CPCB01J27/135B01D53/8671C01B32/40C07C1/12B01D2257/504C07C2527/135B01J35/39C07C9/04
Inventor 高鹏李文豪
Owner HANGZHOU NORMAL UNIVERSITY
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