Synthesis and photocatalytic application of spindle-shaped MIL-101 (Fe) photocatalyst

A photocatalyst and spindle technology, applied in the field of nanomaterials, can solve the problem that active sites cannot participate in photocatalytic reactions, and achieve good photocatalytic activity, increase ammonia production, and simple and safe conditions

Active Publication Date: 2021-08-24
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The morphology of solid micron particles often prevents the active sites inside the catalyst bulk phase from participating in the photocatalytic reaction

Method used

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  • Synthesis and photocatalytic application of spindle-shaped MIL-101 (Fe) photocatalyst
  • Synthesis and photocatalytic application of spindle-shaped MIL-101 (Fe) photocatalyst
  • Synthesis and photocatalytic application of spindle-shaped MIL-101 (Fe) photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Weigh 0.135g of ferric chloride hexahydrate, place it in 15mL of ethylene glycol, stir at 40°C for 1 hour to form A solution; weigh 0.206g of terephthalic acid and 0.675g of ferric chloride hexahydrate Dissolve in 20mL N,N-dimethylformamide solvent to form B solution, pour A solution into B solution, stir evenly, put the solution into a 50 mL high-pressure stainless steel reaction kettle with polytetrafluoroethylene lining , reacted at 110 °C for 20 h. The resulting precipitate was centrifuged, washed with DMF and anhydrous methanol, and dried at 80 °C to obtain MIL-101(Fe)-1 with special morphology.

Embodiment 2

[0022] Example 2: Weigh 0.135g of ferric chloride hexahydrate, place in 15mL of ethylene glycol, stir at 40°C for 2h to form A solution; weigh 0.206g of terephthalic acid and 0.675g of ferric chloride hexahydrate Dissolve in 20mL N,N-dimethylformamide solvent to form B solution, pour A solution into B solution, stir evenly, put the solution into a 50 mL high-pressure stainless steel reaction kettle with polytetrafluoroethylene lining , reacted at 110 °C for 20 h. The resulting precipitate was centrifuged, washed with DMF and anhydrous methanol, and dried at 80 °C to obtain MIL-101(Fe)-2 with a special shape.

Embodiment 3

[0023] Example 3: Weigh 0.135g of ferric chloride hexahydrate, place in 15mL of ethylene glycol, stir at 40°C for 3h to form A solution; weigh 0.206g of terephthalic acid and 0.675g of ferric chloride hexahydrate Dissolve in 20mL N,N-dimethylformamide solvent to form B solution, pour A solution into B solution, stir evenly, put the solution into a 50 mL high-pressure stainless steel reaction kettle with polytetrafluoroethylene lining , reacted at 110 °C for 20 h. The resulting precipitate was centrifuged, washed with DMF and anhydrous methanol, and dried at 80 °C to obtain MIL-101(Fe)-3 with a special shape.

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Abstract

The invention discloses synthesis and photocatalytic application of a spindle-shaped MIL-101 (Fe) photocatalyst, and belongs to the technical field of nano materials. According to the invention, ferric chloride hexahydrate is used as an iron source, terephthalic acid is used as a ligand, and MIL-101 (Fe) with special morphology is synthesized by using a solvothermal method in ethylene glycol and N,N-dimethylformamide (DMF) solvents. The preparation method is simple and easy to implement, economical and environmentally friendly, and the photocatalytic nitrogen fixation ammonia yield of the prepared MIL-101 (Fe) photocatalyst with the special morphology is 2.6 times that of traditional MIL-101 (Fe). Fe in the MIL-101 (Fe) photocatalyst with the special morphology plays a role in activating nitrogen and improving the photo-reduction capacity of the photocatalyst, the content of iron on the surface is increased through the special morphology, and the morphology is beneficial to reflection and refraction of light, so that the photocatalytic activity is improved, and the MIL-101 (Fe) photocatalyst has important significance in improving the nitrogen reduction efficiency.

Description

technical field [0001] The invention relates to the synthesis and photocatalytic application of a spindle shape MIL-101 (Fe) photocatalyst, belonging to the technical field of nanometer materials. Background technique [0002] Metal–organic frameworks (MOFs) is a new type of highly porous material, its structure is composed of metal ions and organic ligands, and its metal center has unsaturated reactive sites, which can be well used as light The catalytic reaction center; the electron transfer trend between the metal junction and the organic ligand is suitable for photocatalytic reactions; the energy band structure is easy to adjust, and can be reasonably adjusted according to the requirements of different reactions; in addition, the large specific surface area and The rich porosity facilitates the rapid charge transfer and shortens the transport distance between the active species and the reaction substrate. [0003] As a kind of MOFs material, MIL-101(Fe) has a super larg...

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J31/22C01C1/02
CPCC08G83/008B01J31/2239B01J31/1691B01J31/2213C01C1/026B01J2231/62B01J2531/842B01J35/39Y02P20/52
Inventor 刘建新郭丽君樊彩梅李瑞张璐璐王雅文
Owner TAIYUAN UNIV OF TECH
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