Novel photocatalytic sensitizer and preparation method thereof

A sensitizer, photocatalytic technology, applied in the field of photochemistry

Inactive Publication Date: 2012-01-04
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic and foreign scholars have not found any successful reports on immobilizing photosensitizers on chitosan

Method used

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  • Novel photocatalytic sensitizer and preparation method thereof
  • Novel photocatalytic sensitizer and preparation method thereof
  • Novel photocatalytic sensitizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of a photocatalytic sensitizer, comprising the following steps,

[0024] In the first step, mix 8.2g of 4-nitrophthalic anhydride, 0.05g of ammonium molybdate as the solute and 10g of urea, put them into a beaker, heat and start to melt, and after they are all melted, grind 1.2g Sprinkle cobalt chloride hexahydrate powder into the beaker, and keep stirring with a glass rod, slowly start heating to 140°C in an oil bath and continue for a period of time, then heat at a constant temperature of 160°C, during the heating process, the green substance continuously emits bubbles, and The volume expands rapidly until no more bubbles are generated, cool to room temperature, and then crush the solid, respectively boil it with 200mL1mol / L hydrochloric acid and 200mL1mol / L sodium hydroxide solution for one hour, cool and filter, and dissolve with water after each filtration The product is washed to neutral, and dried in the air to obtain a green solid substance,...

Embodiment 2

[0034] A preparation method of a novel photocatalytic sensitizer, comprising the following steps,

[0035] In the first step, 8.5g of 4-nitrophthalic anhydride and 1.4g of cobalt chloride hexahydrate, 0.07g of ammonium molybdate as the solute, and 12g of urea after heating and melting as the solvent were used for template reaction at 160°C to obtain Tetranitrocobalt phthalocyanine;

[0036] In the second step, reducing the tetranitrocobalt phthalocyanine with 5.96g sodium sulfide nonahydrate in 35mL of dimethylformamide solution with a mass concentration of 70.5% to obtain tetraaminocobalt phthalocyanine;

[0037] In the third step, 1.0 g of tetraaminocobalt phthalocyanine prepared in the second step is added to 150 mL of dimethylformamide solution with a mass concentration of 71%, and fully dissolved, and 1.8 g of maleic anhydride is dissolved in another 20mL of dimethylformamide solution with a mass concentration of 70%, and then mix the two solutions for reaction, keep the...

Embodiment 3

[0041] A preparation method of a novel photocatalytic sensitizer, comprising the following steps,

[0042]In the first step, 8.0g of 4-nitrophthalic anhydride and 1.5g of cobalt chloride hexahydrate, 0.08g of ammonium molybdate as the solute, and 8g of urea after heating and melting as the solvent were used for template reaction at 160°C to obtain Tetranitrocobalt phthalocyanine;

[0043] In the second step, reducing the tetranitrocobalt phthalocyanine with 5g sodium sulfide nonahydrate in 25mL of 80% dimethylformamide solution to obtain tetraaminocobalt phthalocyanine;

[0044] In the third step, the tetraaminocobalt phthalocyanine prepared in the second step of 0.76g is added to 134mL of dimethylformamide solution with a mass concentration of 70%, and fully dissolved, and 1.6g of maleic anhydride is dissolved in another 17mL of dimethylformamide solution with a mass concentration of 82.5%, then mix the two solutions for reaction, keep the reaction temperature at 60°C, and t...

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Abstract

The invention discloses a novel photocatalytic sensitizer and a preparation method thereof. The preparation method comprises the steps of: preparing amino cobalt phthalocyanine with chitosan as a base material; modifying and subjecting the amino cobalt phthalocyanine to grafting reaction with the chitosan by adopting a heterogeneous manner to obtain nitro phthalocyanine firstly, and then obtain amino phthalocyanine; modifying the phthalocyanine with maleic anhydride; and finally, subjecting the modified phthalocyanine to grafting reaction with the chitosan to obtain a novel catalyst of chitosan grafted butadiene acid acylamino cobalt phthalocyanine. In comparison with the traditional inorganic sensitizer, the novel photocatalytic sensitizer prepared by the invention has the advantages of capabilities of being degraded biologically and used repeatedly, stable nature and low cost.

Description

technical field [0001] The invention relates to the technical field of photochemistry, in particular to a preparation method of a novel photocatalytic sensitizer. Background technique [0002] In the application of solar energy for photocatalytic oxidation technology, the main types of photochemical degradation are: photooxidation, photohydrolysis, photoreduction, molecular rearrangement, photoisomerization, photonucleophilic substitution, photocyclization, etc. The process always has a broad application prospect, so it has attracted the attention of scholars at home and abroad. At present, the existing photosensitizers mainly include: acetone, benzophenone, riboflavin, hydrogen peroxide, methylene blue, acetophenone, TiO2, anthraquinone, rotenone and some aromatic amines. However, the direct application of photosensitizers has disadvantages such as difficult separation, slow mass transfer rate, and inability to recycle. Therefore, the main method used in the specific appli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C08B37/08
Inventor 薛娟琴毛维博毕强李国平郭莹娟洪涛
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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