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Co@In2O3/C composite photocatalyst as well as preparation method and application thereof

A catalyst and composite light technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problems of poor catalytic activity and fast electron-hole recombination rate , to achieve the effect of good reduction activity, easy control of preparation conditions and good stability

Active Publication Date: 2021-12-21
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similar to common photocatalysts, MOF-based photocatalysts also have the problems of fast electron-hole recombination rate after photoexcitation and corresponding poor catalytic activity.

Method used

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  • Co@In2O3/C composite photocatalyst as well as preparation method and application thereof
  • Co@In2O3/C composite photocatalyst as well as preparation method and application thereof
  • Co@In2O3/C composite photocatalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of In-MIL-68: Weigh 500mg of indium nitrate hydrate [In(NO 3 ) 3 wxya 2 O] was dissolved in 150 mL of dimethylformamide (DMF) with stirring at room temperature, followed by the addition of 500 mg of terephthalic acid (C 8 h 6 o 4 ), stirred for 10 minutes to fully dissolve, and then stirred in an oil bath at 120°C for 120 minutes. After the reaction was completed and cooled to room temperature, it was centrifuged and washed 3 times with absolute ethanol, and the white precipitate was collected and vacuum-dried overnight at 60° C. to obtain the product.

[0029] (2) Preparation of ZIF-67: Weigh 1.82g cobalt nitrate hexahydrate [Co(NO 3 ) 2 6H 2 O] and 2.05g2-methylimidazole (C 4 h 6 N 2 ) were ultrasonically dissolved in 50 mL of methanol at room temperature, and then the 2-methylimidazole solution was added dropwise into the cobalt nitrate solution, and ultrasonicated at 25° C. for 15 min, and then stirred at 25° C. for 24 h. After the reacti...

Embodiment 2

[0033] According to the method of Example 1, the calcination temperature of 550°C in step (4) was replaced by 500°C and 600°C to calcinate the ZIF-67@In-MIL-68 composite, and the other operations were the same as in Example 1 to prepare 500℃Co@In 2 o 3 / C and 600℃Co@In 2 o 3 / C composite catalyst.

[0034] 1. Crystal phase structure and morphology characterization of carbon dots-coated indium oxide nanotube composite photocatalysts grown in situ by MOF-derived cobalt nanoparticles:

[0035] In-MIL-68, ZIF-67, ZIF-67@In-MIL-68 composites prepared in Examples 1 and 2, and the calcined product In 2 o 3 / C, Co, 500℃Co@In 2 o 3 / C, 550℃Co@In 2 o 3 / C and 600℃Co@In 2 o 3 The crystal phase structure of the / C photocatalyst was analyzed by X-ray diffractometer. X-ray diffraction pattern as Figure 1a As shown, the In-MIL-68 and ZIF-67 prepared in the experiment corresponded to the XRD diffraction peaks simulated by the software, indicating that the two MOFs were successful...

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Abstract

The invention belongs to the field of photocatalytic CO2 reduction, and relates to a Co@In2O3 / C composite photocatalyst and a preparation method and application thereof. The preparation method comprises the steps that In-MIL-68 is fully dispersed in a methanol solution, a methanol solution of cobalt nitrate is dropwise added under the stirring condition, continuous stirring is conducted for 30-60 min after dropwise adding is completed, then a methanol solution of 2-methylimidazole is dropwise added, and then stirring is carried out for 24-28 hours at the temperature of 20-25 DEG C, a precipitate is collected, cleaned, and dried to obtain the ZIF-67@In-MIL-68 powder. The preparation method is simple and convenient, the cost is low, and the preparation conditions are easy to control. The obtained Co@In2O3 / C composite photocatalyst has the advantages of stable chemical properties, no secondary pollution, easily available raw materials, low preparation cost, high catalytic efficiency and the like when being used in a photocatalytic CO2 reduction reaction, so that the Co@In2O3 / C composite photocatalyst has certain research and application values.

Description

technical field [0001] The invention belongs to photocatalytic CO 2 Restore the field, involving Co@In 2 o 3 / C composite photocatalyst and its preparation method and application. Background technique [0002] With the advancement of industry, the problems of energy shortage and environmental pollution have become increasingly prominent, which have become two major challenges that human beings must face. Excessive use of fossil fuels emits large amounts of carbon dioxide (CO 2 ), enhancing the greenhouse effect and causing global warming. Photocatalytic technology provides us with an ideal method of energy utilization and environmental pollution control, which makes scientists do a lot of research work in the field of energy catalysis and environmental friendly application research, and the development and utilization of new and effective photocatalysts is more important. It is an important subject of scientific research in the 21st century. [0003] The greatest advan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/08B01J23/75B01J23/825B01J35/00B01J37/08C01B3/04C01B32/40
CPCB01J23/825B01J23/75B01J23/08B01J37/086C01B3/04C01B32/40B01J35/391B01J35/393B01J35/39Y02E60/36
Inventor 梁倩赵爽李忠玉
Owner CHANGZHOU UNIV
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