Preparation method and application of hydrogel material for hydrogen production by water photolysis under visible light

A technology of photo-splitting water for hydrogen production and hydrogel, which is applied in the field of photocatalysis and can solve the problem of low hydrogen production efficiency and so on.

Active Publication Date: 2020-08-25
峰特(浙江)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Hydrogen production by photolysis of water has the advantages of energy saving, cleanliness, and no pollution. Since photocatalytic water decomposition includes various physical and chemical processes such

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of a hydrogel material for visible light photolysis of water to produce hydrogen is as follows:

[0021] Step 1: Preparation of photosensitizer: add 36.0g (100mmol) of 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline and 63.7g (600mmol) of Benzaldehyde, add 3.5L acetic anhydride as a solvent, heat to reflux, react for 10 hours, cool to room temperature, drop the reaction solution into deionized water, precipitate solid, filter to obtain a filter cake, recrystallize and filter with dichloromethane The cake obtained 45.6 g of the photosensitizer 2,9-distyryl-4,7-diphenyl-1,10-phenanthroline, with a yield of 85%.

[0022] Step 2: Preparation of the catalyst: under nitrogen protection, add 25.0g 2,9-distyryl-4,7-diphenyl-1,10-phenanthroline and 27.0g Xantphos to the round bottom flask, and use 250mL After tetrahydrofuran was dissolved, 2.4 g of cobalt chloride was added, and after stirring, the color changed from blue to pink, ligands were formed in situ,...

Embodiment 2

[0026] Compared with Example 1, Example 2 is different in that Step 4 is different in Example 2: In the reactor, 23g N-hydroxyethyl-3,3-dimethylindoline spiropyran-methacrylic acid Esters, 17.2g of N-isopropylacrylamide and 18.4g of methyl acrylate were mixed in 150mL of pure water, and at low temperature, 5.9g of cumene peroxide and 5.9g of tetramethylethylenediamine were added, and polymerized for 2 hours , then add 4.1 g of the catalyst prepared in step 2, stir for 30 min, heat up to room temperature and stir for 2 hours to obtain a hydrogel material.

Embodiment 3

[0028] Compared with Example 1, Example 3 is different in that Step 4 is different in Example 3: In the reactor, 23g N-hydroxyethyl-3,3-dimethylindoline spiropyran-methacrylic acid Mix ester, 20.7g N-isopropylacrylamide and 21.0g methyl acrylate in 150mL pure water, add 6.5g cumene peroxide and 6.5g tetramethylethylenediamine at low temperature, polymerize for 2 hours , and then add 6.5 g of the catalyst prepared in step 2, stir for 30 min, heat up to room temperature and stir for 2 hours to obtain a hydrogel material.

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PUM

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Abstract

A hydrogel material for hydrogen production by water photolysis under visible light is prepared by the following method: step 1, preparing a photosensitizer; 2, preparing a catalyst; 3, preparing a light-driven compound; and 4, preparing the gel material. According to the invention, a cobalt complex of a hydrogel-loaded phenanthroline derivative is used as a visible light water photolysis hydrogenproduction material, N-hydroxyethyl-3, 3-dimethyl indoline spiropyrane-methacrylate as one of the raw materials for preparing the hydrogel has a light swelling effect, under the condition of illumination, the volume of the material expands, the pores of hydrogel are enlarged, contact between water and a catalyst is facilitated, the loaded photosensitizer can receive light energy more easily, theloaded photosensitizer is transited from a ground state to an excited state after absorbing the light energy, electrons are more easily captured from an electron sacrificial agent and transmitted to ahydrogen production catalyst, the photosensitizer returns to the ground state, and hydrogen protons in water are converted into hydrogen by the hydrogen production catalyst.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a preparation method and application of a hydrogel material for hydrogen production by photolysis of water with visible light. Background technique [0002] With the deterioration of energy consumption and environmental pollution, the development of new clean energy is an important way to deal with this crisis. Due to its abundant reserves, good combustion performance, light weight, and no pollution, hydrogen energy has become an efficient and clean energy that is most likely to replace fossil fuels. Hydrogen energy has broad application prospects in the fields of environmentally friendly vehicles, home heating, and hydrogen power generation. [0003] Hydrogen has good characteristics and is expected to become a substitute for fossil fuels: 1) High combustion value. If 0.1kg of hydrogen is completely burned, it can release 1.43×10 7 J energy, which can heat ...

Claims

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Application Information

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IPC IPC(8): B01J31/24B01J31/22C01B3/04
CPCB01J31/183B01J31/2452B01J35/0013B01J2531/845C01B3/042C01B2203/0277C01B2203/1052Y02E60/36
Inventor 严文忠
Owner 峰特(浙江)新材料有限公司
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