Preparation method of core-shell type cuprous oxide photocatalyst

A cuprous oxide and photocatalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problem of reducing the density of cuprous oxide and application costs, difficult to control the operation process, difficult to recycle and reuse, etc. Problems, to achieve the effect of reducing density and application cost, good effect, easy to recycle and reuse

Inactive Publication Date: 2017-05-24
常州梦泰照明科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is that the current ultra-fine, high-purity cuprous oxide is prone to agglomeration, and because the particle size is too small, it is difficult to control the operation process, resulting in the disadvantage that it is not easy to recycle and reuse
The core-shell type cuprous oxide prepared by the present invention hybridizes the electronic structure of the core and the shell, which solves the problem of agglomeration of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Weigh 20g of mordenite and pour it into a beaker filled with 500mL of 0.5mol / L sodium hydroxide solution, heat and boil for 10min, put the boiled mordenite into a muffle furnace, and calcinate at 600°C for 1h to obtain the premodified 10g of the above-mentioned pre-modified mordenite is poured into the Erlenmeyer flask, and 100mL mass fraction of 30% tartaric acid solution and 100mL mass fraction of 20% citric acid solution and 50g of the active sewage of the secondary sedimentation tank are added to the Erlenmeyer flask. Stir evenly, seal the bottle mouth, seal and ferment at 35°C for 7 days, filter and remove the filtrate after fermentation, rinse the filter residue with deionized water repeatedly for 15 minutes, obtain fermented modified mordenite after drying, and put it into a ball mill tank After grinding for 3 hours, pass through a 400-mesh sieve to obtain the catalytic core; add 200mL copper sulfate solution with a concentration of 1mol / L to the thermostatic glas...

example 2

[0023]Weigh 25g of mordenite and pour it into a beaker filled with 550mL of 0.5mol / L sodium hydroxide solution, heat and boil for 13min, put the boiled mordenite into a muffle furnace, and calcinate at 650°C for 1h to obtain the premodified 13g of the above-mentioned pre-modified mordenite is poured into the Erlenmeyer flask, and 150mL mass fraction of 30% tartaric acid solution and 150mL mass fraction of 20% citric acid solution and 55g of the active sewage of the secondary sedimentation tank are added to the Erlenmeyer flask. After stirring evenly, seal the bottle mouth, seal and ferment at 40°C for 8 days, filter and remove the filtrate after fermentation, rinse the filter residue with deionized water repeatedly for 18 minutes, obtain fermented modified mordenite after drying, and put it into a ball mill tank After grinding for 4 hours, pass through a 400-mesh sieve to obtain the catalytic core; add 250mL copper sulfate solution with a concentration of 1mol / L to the thermost...

example 3

[0026] Weigh 30g of mordenite and pour it into a beaker filled with 600mL of 0.5mol / L sodium hydroxide solution, heat and boil for 15min, put the boiled mordenite into a muffle furnace, and calcinate at 700°C for 2h to obtain the premodified 15g of the above-mentioned pre-modified mordenite is poured into the Erlenmeyer flask, and 200mL mass fraction of 30% tartaric acid solution and 200mL mass fraction of 20% citric acid solution and 60g of secondary sedimentation tank active sewage are added into the Erlenmeyer flask. After stirring evenly, seal the bottle mouth, seal and ferment at 45°C for 9 days, filter and remove the filtrate after fermentation, rinse the filter residue with deionized water repeatedly for 20 minutes, obtain fermented modified mordenite after drying, and put it into a ball mill tank After grinding for 5 hours, pass through a 400-mesh sieve to obtain the catalytic core; add 300mL copper sulfate solution with a concentration of 1mol / L to the thermostatic gla...

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Abstract

The invention relates to a preparation method of a core-shell type cuprous oxide photocatalyst and belongs to the technical field of preparation of photocatalysts. The preparation method comprises the following step of: boiling with alkalie to remove silicon; fermenting and modifying by utilizing organic carboxylic acid and active sludge; increasing the quantity of carboxyl groups on the surface of zeolite under the action of active sludge microorganisms; taking the modified zeolite as an inner core of the catalyst and adding the modified zeolite into a copper ion solution; forming a copper hydroxide precursor under an alkaline condition and reducing copper hydroxide by glucose to form a cuprous oxide crystal nucleus; generating electrostatic and chemical adsorption through the carboxyl groups and the cuprous oxide crystal nucleus on the surface of the zeolite; and gradually depositing cuprous oxide on the surface of the zeolite, so as to form urchin-like core-shell type cuprous oxide. According to the core-shell type cuprous oxide prepared by the invention, electronic structures of the inner core and a shell are hybridized, and the problem that pure cuprous oxide is agglomerated is solved; the sizes the core and the shell are larger than the size of a cuprous oxide crystal grain; when the core-shell type cuprous oxide photocatalyst is used, an operation process is relatively easy to control; the core-shell type cuprous oxide photocatalyst is easy to recycle and reutilize and has wide application prospect.

Description

technical field [0001] The invention relates to a preparation method of a core-shell type cuprous oxide photocatalyst, belonging to the technical field of photocatalyst preparation. Background technique [0002] Foreign studies on cuprous oxide as a semiconductor material for visible light catalysts began in the late 1970s. When it was applied to solar cells, it showed more stability than people imagined, and it also showed that cuprous oxide can play a role in the field of catalysis. very important application. This study gave a lot of inspiration to many researchers, and the degree of attention to cuprous oxide is increasing day by day, and it has been studied in depth and meticulously, and it is found that Cu 2 O is a p-type semiconductor with metal vacancy, because its band gap is between 2.0 and 2.2e V, and the absorption threshold light wavelength is between 564 and 620nm, it can effectively generate photogenerated carriers under visible light irradiation. Can overco...

Claims

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Application Information

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IPC IPC(8): B01J29/24C02F1/30C02F101/34C02F101/38
CPCY02W10/37B01J29/24B01J35/004C02F1/30C02F2101/34C02F2101/38C02F2101/40
Inventor 林晨
Owner 常州梦泰照明科技有限公司
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