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Preparation and electro-catalytic performance of g-C3N4/two-dimensional porphyrin MOF material

A g-c3n4, electrocatalysis technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of unsatisfactory electrocatalytic activity and low charge separation efficiency.

Pending Publication Date: 2022-01-21
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low charge separation efficiency of a single 2D MOF material, its electrocatalytic activity is not ideal, and its CO 2 The adsorption capacity also plays a crucial role in improving the photocatalytic activity, so some effective modification strategies on it have been applied to improve the electrocatalytic reduction performance

Method used

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  • Preparation and electro-catalytic performance of g-C3N4/two-dimensional porphyrin MOF material
  • Preparation and electro-catalytic performance of g-C3N4/two-dimensional porphyrin MOF material
  • Preparation and electro-catalytic performance of g-C3N4/two-dimensional porphyrin MOF material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] With electrocatalytic reduction of CO 2 Preparation and performance testing of two-dimensional porphyrin MOF.

[0025] (1) Two-dimensional porphyrin MOF by organic solvent method:

[0026] Take Co(NO 3 )2·6H2O (9mg), pyrazine (2.4mg) were put into a reaction kettle (100mL), DMF (15mL) and ethanol (5mL) were added again for mixing, and stirred for 5min. Weigh TCPP (13.2mg), DMF (9mL), and absolute ethanol (3mL) into a centrifuge tube, sonicate for 2min, add dropwise to the stirring reactor, stir for 30min, put the reactor into the jacket, and React in an oven at 80°C for 24 hours, take out the reaction kettle, cool to room temperature, open the kettle for centrifugation, wash with ethanol three times for 3 minutes each time, pour off the supernatant, and dry the precipitate in an oven (60°C).

[0027] (2) Electrocatalytic reduction of CO by two-dimensional porphyrin MOF 2 performance research

[0028] Take 5mg of two-dimensional porphyrin MOF sample dissolved in 500...

Embodiment 2

[0030] Excellent electrocatalytic reduction of CO 2 Performance g-C 3 N 4 / Preparation and performance testing of two-dimensional porphyrin MOF materials.

[0031](1) Preparation of g-C by organic solvent method 3 N 4 / Two-dimensional porphyrin MOF materials:

[0032] Take 28mg of g-C3N4 (among which the two-dimensional porphyrin MOF accounts for 40%) and put it into the reaction kettle (100mL), add DMF (27mL), absolute ethanol (9mL) into the magnet, stir for 15min, weigh the Co(NO3 )2·6H2O (9mg), put into the reaction kettle, stir for 10min, weigh TCPP (13.2mg), DMF (9mL), anhydrous ethanol (3mL) into a centrifuge tube and mix evenly, sonicate for 2min, add dropwise In a hydrothermal kettle, react in an oven at 80°C for 24 hours, take out the reaction kettle, cool to room temperature, centrifuge at 5000RPM for 4min, wash with ethanol three times, and wash twice with water. Put it in an oven to dry at 60°C, put it into a 10mL centrifuge tube after drying, and mark it a...

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Abstract

The invention provides a preparation method and application of a g-C3N4 / two-dimensional porphyrin MOF material. The g-C3N4 / two-dimensional porphyrin MOF material with different compounding ratios is obtained and is used for research on electrocatalytic reduction of carbon dioxide. According to the specific technical scheme, when the g-C3N4 / two-dimensional porphyrin MOF composite material is synthesized, different amounts of g-C3N4 are taken for synthesis, and the stable g-C3N4 / two-dimensional porphyrin MOF material is formed; the g-C3N4 / two-dimensional porphyrin MOF material semiconductor electrocatalyst has a proper forbidden band width, is beneficial to transition transfer of electrons, effectively promotes separation of electron holes, can inhibit re-compounding of photon-generated carriers, and improves photocatalytic performance. The preparation process is simple, the catalyst stability is high, and the g-C3N4 nano material and the two-dimensional porphyrin MOF material are synthesized into the g-C3N4 / two-dimensional porphyrin MOF composite material. CO2 can be electrocatalytically reduced into available clean fuel CO and H2, a solution is provided for environmental problems and energy shortage, and the method has remarkable economic benefits and application prospects.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and in particular relates to a method for electrocatalytic reduction of CO 2 Preparation methods and applications of novel catalysts. Background technique [0002] In the past era, population growth and technological progress led to energy consumption, which met the energy demand through the combustion of a large number of fossil fuels, such as gasoline, coal, natural gas, etc., but at the same time brought a series of environmental problems, Such as nitrous oxide, sulfur oxide, carbon dioxide. Carbon dioxide is a greenhouse gas closely related to ocean acidification and global warming. A better response strategy at present is to replace fossil fuels with renewable energy and to develop effective carbon dioxide capture and conversion technologies. Among them, carbon dioxide is converted into renewable energy through electrochemical reduction. It is a high-value product that can not...

Claims

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Application Information

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IPC IPC(8): C25B1/23C25B11/095
CPCC25B1/23C25B11/095
Inventor 尹晓红郭家庆
Owner TIANJIN UNIVERSITY OF TECHNOLOGY