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Preparation method of silver-doped modified biological filter material

A technology of biological filter material and silver doping, applied in chemical instruments and methods, biological water/sewage treatment, chemical/physical processes, etc., can solve problems such as unsatisfactory photocatalytic performance and inability to effectively remove organic matter and nutrient salts , to achieve the effect of improving photocatalytic degradation performance, reducing neutralization, and increasing pollutant concentration

Inactive Publication Date: 2019-01-01
江苏新亿源环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at the defects of most existing products, the unsatisfactory photocatalytic performance, and the inability to effectively remove organic matter and nutrient salts, a preparation of a silver-doped modified biological filter material is provided method

Method used

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  • Preparation method of silver-doped modified biological filter material

Examples

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example 1

[0023] Take 15mmol of urea, 30mmol of silver nitrate, and 30mmol of nano-titanium dioxide, mix them evenly, add them into deionized water at a mass ratio of 1:10, stir at 300r / min for 20min, then add 10mmol of phosphoric acid, stir them evenly, put them into a reaction kettle, and heat them with microwave to 80°C, keep warm for 30 minutes, cool to room temperature and filter to obtain the filter residue, wash the filter residue twice with deionized water, put it in a drying oven, and dry it to constant weight at 60°C to obtain a silver phosphate / titanium dioxide composite material, take 3gβ -Cyclodextrin, add 100g mass fraction to 25% sodium hydroxide solution, stir at 200r / min for 20min, then dropwise add 1.8g epichlorohydrin at 0.1g / min, continue stirring for 1h to obtain prepolymer, take Add 10g silver phosphate / titanium dioxide composite material to 100g mass fraction of 25% sodium hydroxide solution, disperse with 300W ultrasonic wave for 15min to obtain a dispersion, add ...

example 2

[0025] Take 22mmol of urea, 45mmol of silver nitrate, and 45mmol of nano-titanium dioxide, mix them evenly, add them into deionized water at a mass ratio of 1:10, stir at 350r / min for 25min, then add 15mmol of phosphoric acid, stir evenly, put them into a reaction kettle, and heat with microwave to 85°C, keep warm for 35 minutes, cool to room temperature and filter to obtain filter residue, wash the filter residue twice with deionized water, place in a drying oven, and dry at 70°C to constant weight to obtain silver phosphate / titanium dioxide composite material, take 5gβ -Cyclodextrin, add 150g mass fraction to 25% sodium hydroxide solution, stir at 250r / min for 25min, then dropwise add 2.7g epichlorohydrin at 0.15g / min, continue to stir for 1h, get prepolymer, take Add 15g of silver phosphate / titanium dioxide composite material into 150g of 25% sodium hydroxide solution by mass fraction, disperse with 300W ultrasonic wave for 17min to obtain a dispersion, add the dispersion to...

example 3

[0027]Take 30mmol of urea, 60mmol of silver nitrate, and 60mmol of nano-titanium dioxide, mix them evenly, add them into deionized water according to the mass ratio of 1:10, stir at 400r / min for 30min, then add 20mmol of phosphoric acid, stir them evenly, put them into the reaction kettle, and heat them with microwave to 90°C, heat-retain for 40 minutes, cool to room temperature and filter to obtain the filter residue, wash the filter residue 3 times with deionized water, place in a drying oven, and dry at 80°C to constant weight to obtain silver phosphate / titanium dioxide composite material, take 6gβ -Cyclodextrin, add 200g mass fraction to 25% sodium hydroxide solution, stir at 300r / min for 30min, then dropwise add 3.6g epichlorohydrin at 0.2g / min, continue stirring for 2h to obtain prepolymer, take Add 20g of silver phosphate / titanium dioxide composite material into 200g of 25% sodium hydroxide solution by mass fraction, disperse with 300W ultrasonic wave for 20min to obtain...

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Abstract

The invention relates to a preparation method of a silver-doped modified biological filter material, which belongs to the technical field of clean environment-friendly materials. A medium is heated byutilizing the effect of a microwave electromagnetic field, silver phosphate is prepared by virtue of the microwave-assisting uniform precipitation method, the silver phosphate is precipitated on nanotitanium dioxide, the prepared silver phosphate is in a cubic crystal four-feet shape and can well absorb and utilize the visible light, the photo-induced electron-hole pair compositing probability is small, the silver phosphate is embedded by virtue of beta-cyclodextrin after being composited with titanium dioxide, so that the silver-doped modified biological filter material has the beta-cyclodextrin cavity structure, and also has higher mechanical strength, better light transmittance, and larger specific surface area, the pollutant concentration on the surface of the nano silver phosphate / titanium dioxide composite material can be greatly improved, the catalytic efficiency can be improved; and meanwhile, due to the obstruction effect of the beta-cyclodextrin, the electron-hole pair composite probability is reduced, the neutralization of the electron-hole pair inside crystals can be reduced, and the photocatalytic activity is improved. The preparation method of the silver-doped modified biological filter material has wide market prospect and application prospect.

Description

technical field [0001] The invention relates to a preparation method of a silver-doped modified biological filter material, which belongs to the technical field of clean and environment-friendly materials. Background technique [0002] The treatment of urban domestic sewage is an important part of environmental protection work. The quality of its treatment is directly related to the filter materials used. Most of the filter materials currently used are powdery, such as quartz sand as the main component. River sand for construction, or other ceramsite filter materials such as clay sintered into small particles. There are some problems in these filter materials to varying degrees. For example, the river sand is a very small particle, and the filter material itself has no pores. Its filtering effect is completed through the gaps between the filter materials. Impurities can easily block the gaps between sand particles, lose the filtering effect, use for a short time, be inconve...

Claims

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Application Information

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IPC IPC(8): C02F3/00C02F3/34B01J31/38B01J35/02
CPCC02F3/00C02F3/34B01J31/38C02F2305/10B01J35/00B01J35/30B01J35/39
Inventor 雷广云蒋梦成
Owner 江苏新亿源环保科技有限公司