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Novel confinement inorganic perovskite Cs3Bi2Br9 photocatalytic membrane as well as preparation method and application thereof

A technology of photocatalytic film and inorganic calcium, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc.

Pending Publication Date: 2021-05-11
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, the application of confinement catalysis is mostly concentrated in the field of organic synthesis, and there is still a lack of research on confinement all-inorganic perovskite materials and their application in the removal of NO.

Method used

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  • Novel confinement inorganic perovskite Cs3Bi2Br9 photocatalytic membrane as well as preparation method and application thereof
  • Novel confinement inorganic perovskite Cs3Bi2Br9 photocatalytic membrane as well as preparation method and application thereof
  • Novel confinement inorganic perovskite Cs3Bi2Br9 photocatalytic membrane as well as preparation method and application thereof

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Experimental program
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Embodiment 1

[0043] A Novel Confined Inorganic Perovskite Cs 3 Bi 2 Br 9 A method for preparing a photocatalytic film, comprising the steps of:

[0044] (1) Preparation of mesoporous silica SBA-15(⊥): Weigh 0.7g polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (PEO-PPO-PEO, three Block copolymer P123) was put into a beaker, added 50mL deionized water, stirred in a water bath at 45°C for 1h, added 0.75g cetyltrimethylammonium bromide and 1g sodium dodecylsulfonate, and continued to Stir in a water bath at 45°C for 1h to obtain a mixed solution; then pour the mixed solution into 150mL, 80.0mmol / L, pH ≈ 5.0 sodium silicate aqueous solution, then turn off the stirring and stand at 45°C for 12h, filter the filtered The cake was washed 3 times with distilled water, dried at 60°C, put into a muffle furnace and roasted at 600°C for 6 hours to obtain a mesoporous silica SBA-15(⊥) powder material, and its BET specific surface area was tested to be 400~ 1000m 2 / g;

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Embodiment 2

[0049] A Novel Confined Inorganic Perovskite Cs 3 Bi 2 Br 9 A method for preparing a photocatalytic film, comprising the steps of:

[0050] (1) Preparation of mesoporous silica SBA-15 (⊥): Weigh 2 g of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (PEO-PPO-PEO, triblock segment copolymer P123) into a beaker, add 50mL of deionized water, stir in a water bath at 45°C for 1h, add 0.75g of cetyltrimethylammonium bromide and 1g of sodium dodecylsulfonate, continue at 45 Stir in a water bath at ℃ for 1 hour to obtain a mixed solution; then pour the mixed solution into 150mL, 80.0mmol / L, pH≈5.0 sodium silicate aqueous solution, then turn off the stirring and let it stand at 45℃ for 24h, and filter the filter cake Wash with distilled water for 3 times, dry at 60°C, put it into a muffle furnace and bake at 600°C for 6 hours to obtain a mesoporous silica SBA-15(⊥) powder material, and its BET specific surface area is 400-1000m 2 / g;

[0051] (2)Cs 3 ...

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Abstract

The invention discloses a novel confinement inorganic perovskite Cs3Bi2Br9 photocatalytic membrane as well as a preparation method and application thereof, and belongs to the technical field of chemical catalysts and preparation thereof. The preparation method of the confined inorganic perovskite Cs3Bi2Br9 photocatalytic membrane comprises the following steps: preparing mesoporous silica SBA-15 (inverted T), preparing the Cs3Bi2Br9 nanocrystal, and preparing the confined Cs3Bi2Br9 photocatalytic membrane. According to the novel confinement inorganic perovskite Cs3Bi2Br9 photocatalytic membrane, mesoporous silica SBA-15 (inverted T) is used as a confinement framework, Cs3Bi2Br9 is subjected to suction filtration into an SBA-15 (inverted T) pore channel through a simple suction filtration method to obtain the confinement photocatalytic membrane, active sites are effectively exposed and Cs3Bi2Br9 nanocrystal agglomeration and denaturation are inhibited by utilizing the confinement effect of the pore channel structure, and therefore the catalytic activity and the stability of the Cs3Bi2Br9 are improved.

Description

technical field [0001] The invention belongs to the technical field of chemical catalysts and their preparation, in particular to a novel confined inorganic perovskite Cs 3 Bi 2 Br 9 Photocatalytic film and its preparation method and application. Background technique [0002] With the rapid development of economy and automobile industry, NO x The sharp increase in emissions has caused environmental phenomena such as acid rain, ozone layer depletion, and photochemical smog, causing serious poisoning to humans, animals and plants. Therefore, the development of efficient NO x Purification technology has important scientific value and application prospect. [0003] Photocatalytic technology has been proved to be one of the effective methods to remove NO pollution. The use of semiconductor photocatalysis can oxidize and remove low concentration NO in the atmosphere. Recently, all-inorganic perovskite nanocrystals have attracted extensive attention from researchers in the f...

Claims

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Application Information

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IPC IPC(8): B01J29/03B01J35/06B01D53/86B01D53/56
CPCB01J29/0341B01D53/8628B01J2229/186B01J35/59B01J35/39
Inventor 杨婧羚朱明山刘斌张敏娴
Owner JINAN UNIVERSITY