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a ce-mof/bi 2 moo 6 Heterojunction photocatalyst, preparation method and application thereof

A photocatalyst and heterojunction technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, catalysts, etc., can solve problems such as low conversion efficiency, slow reaction rate, and poor practical application , to achieve the effect of high transfer rate, mild reaction conditions and long survival life

Active Publication Date: 2022-07-08
DATANG NANJING ENVIRONMENTAL PROTECTION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing photocatalytic materials generally have disadvantages such as low conversion efficiency, slow reaction rate, and poor practical application.

Method used

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  • a ce-mof/bi <sub>2</sub> moo <sub>6</sub> Heterojunction photocatalyst, preparation method and application thereof
  • a ce-mof/bi <sub>2</sub> moo <sub>6</sub> Heterojunction photocatalyst, preparation method and application thereof
  • a ce-mof/bi <sub>2</sub> moo <sub>6</sub> Heterojunction photocatalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This example prepares a kind of photocatalytic reduction of CO 2 Ce-MOF / Bi 2 MoO 6 Heterojunction photocatalysts in which Ce-MOF and Bi 2 MoO 6 The mass ratio of 0.15:0.216; the specific steps are as follows:

[0040] 1. Preparation of Ce-MOF

[0041] 0.216 g of cerium nitrate hexahydrate and 0.21 g of trimesic acid were dissolved in 4 mL and 8 mL of DMF, respectively, and stirred evenly to obtain a cerium nitrate solution and a trimesic acid solution.

[0042] The cerium nitrate solution and the trimesic acid solution were mixed, and then a certain amount of ammonia water was added to adjust the pH value of the mixed solution to 4.1; the mixed solution after adjusting the pH value was put into the reaction kettle, and hydrothermally reacted at 160 ° C for 17 hours . After the reaction, the reaction product was washed, and then the precipitate in the suspension was dried at 160 ° C to obtain a white powder Ce-MOF photocatalyst. The SEM scanning electron microscope r...

Embodiment 2

[0054] This example prepares a kind of photocatalytic reduction of CO 2 Ce-MOF / Bi 2 MoO 6 Heterojunction photocatalysts in which Ce-MOF and Bi 2 MoO 6 The mass ratio of 0.15:0.108; the specific steps are as follows:

[0055] 1. Preparation of Ce-MOF

[0056] 0.216 g of cerium nitrate hexahydrate and 0.21 g of trimesic acid were dissolved in 4 mL and 8 mL of DMF, respectively, and stirred evenly to obtain a cerium nitrate solution and a trimesic acid solution.

[0057] Mix the above-mentioned cerium nitrate solution and trimesic acid solution, and then add a certain amount of ammonia water to adjust the pH value of the mixed solution to 3; put the mixed solution after adjusting the pH value into the reaction kettle, and conduct a hydrothermal reaction at 120 ° C for 15 hours . After the reaction, the reaction product was washed, and then the precipitate in the suspension was dried at 140° C. to obtain a white powder Ce-MOF photocatalyst.

[0058] 2. Bi 2 MoO 6 preparat...

Embodiment 3

[0069] This example prepares a kind of photocatalytic reduction of CO 2 Ce-MOF / Bi 2 MoO 6 Heterojunction photocatalysts in which Ce-MOF and Bi 2 MoO 6 The mass ratio of 0.15:0.054; the specific steps are as follows:

[0070] 1. Preparation of Ce-MOF:

[0071] 0.216 g of cerium nitrate hexahydrate and 0.21 g of trimesic acid were dissolved in 4 mL and 8 mL of DMF, respectively, and stirred evenly to obtain a cerium nitrate solution and a trimesic acid solution.

[0072] Mix the above-mentioned cerium nitrate solution and trimesic acid solution, and then add a certain amount of ammonia water to adjust the pH value of the mixed solution to 5; put the mixed solution after adjusting the pH value into the reaction kettle, and conduct a hydrothermal reaction at 180 ° C for 20 hours . After the reaction, the reaction product was washed, and then the precipitate in the suspension was dried at 180° C. to obtain a white powdery Ce-MOF photocatalyst.

[0073] 2. Bi 2 MoO 6 prepar...

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Abstract

The present invention provides a Ce-MOF / Bi 2 MoO 6 Heterojunction photocatalyst and preparation method and application thereof. The preparation method of the present invention includes the following steps: A) dissolving a cerium source material and an organic linker in an organic solvent, stirring and mixing evenly and adjusting the pH value, performing a hydrothermal reaction, then washing and drying to obtain a Ce-MOF photocatalyst B) bismuth source material and platinum source material are dissolved in deionized water, stir and mix and adjust pH value and carry out hydrothermal reaction, then wash, dry, obtain Bi 2 MoO 6 Photocatalyst; C) Combining Ce-MOF photocatalyst with Bi 2 MoO 6 The photocatalyst is dispersed in an organic solvent, stirred, then washed and dried to obtain Ce-MOF / Bi 2 MoO 6 Heterojunction photocatalysts. The photocatalyst of the invention has the advantages of large specific surface area, high transfer rate of photogenerated carriers, long carrier survival life, strong catalytic activity and the like.

Description

technical field [0001] The invention relates to the technical field of photocatalysts, in particular to a Ce-MOF / Bi 2 MoO 6 Heterojunction photocatalyst and preparation method and application thereof. Background technique [0002] At present, energy shortage and environmental degradation are serious problems faced by human beings. Due to the excessive development and use of fossil fuels such as coal, oil, and natural gas, the concentration of carbon dioxide in the atmosphere has continued to rise, resulting in a series of negative results such as acid rain and the greenhouse effect. Therefore, it is of great significance to develop clean energy to replace traditional non-renewable energy. [0003] The development and utilization of solar energy is an important research topic in the 21st century, and photocatalytic technology is expected to become an effective technical means to solve the problems of environmental pollution and energy shortage. CO 2 As a C1 resource, it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22B01J31/34C07C1/12C07C29/153C07C9/04C07C31/04
CPCB01J35/004B01J31/2239B01J31/34C07C1/12C07C29/153B01J2531/38B01J2231/625C07C2531/22C07C2531/34C07C9/04C07C31/04Y02P20/52
Inventor 蔡炜于雪李小海王虎江晓明陈敏东
Owner DATANG NANJING ENVIRONMENTAL PROTECTION TECH
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