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Preparation method of silver carbonate compounded silver bromide photocatalyst

A technology of photocatalyst and silver carbonate, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as performance needs to be improved

Inactive Publication Date: 2017-07-28
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of its own characteristics, the performance of silver carbonate needs to be improved in terms of photocatalytic degradation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Weigh 16mmol silver nitrate, configure it into a 15mmol / L silver nitrate solution, weigh 8mmol sodium carbonate, configure it into a 20mmol / L sodium carbonate solution; mix the above two solutions at a speed of 350 rpm to form a gel The substance was continuously stirred for 3 hours. During the stirring process, sodium carbonate and silver nitrate reacted to generate silver carbonate colloid; the silver carbonate colloid was placed in a semi-permeable membrane bag, washed 3 times with distilled water to remove free ions, and then the silver carbonate colloid was Add the colloid to 60mL of sodium bromide solution with a concentration of 3mol / L, soak for 2 days, form silver bromide nanoparticles on the surface of silver carbonate particles, separate the solid from the liquid, wash the solid twice with deionized water, and dry it at 75°C to prepare A silver carbonate composite silver bromide photocatalyst is obtained.

[0013] Add 0.5 g of the obtained silver carbonate com...

Embodiment 2

[0015] Take by weighing 12mmol silver nitrate, configure it into a 15mmol / L silver nitrate solution, take by weighing 6.6mmol sodium carbonate, configure it into a 20mmol / L sodium carbonate solution; mix the above two solutions at a speed of 400 rpm to form a gel Stir continuously for 4 hours, during the stirring process, sodium carbonate and silver nitrate react to generate silver carbonate colloid; silver carbonate colloid is placed in a semi-permeable membrane bag, washed 4 times with distilled water to remove free ions, and then the carbonic acid colloid Add silver colloid to 80mL sodium bromide solution with a concentration of 4mol / L, soak for 4 days, form silver bromide nanoparticles on the surface of silver carbonate particles, separate solid from liquid, wash solid with deionized water for 3 times, and dry at 105°C. A silver carbonate composite silver bromide photocatalyst is prepared.

[0016] Add 0.5 g of the obtained silver carbonate composite silver bromide photoca...

Embodiment 3

[0018] Take by weighing 14mmol silver nitrate, configure it into a 15mmol / L silver nitrate solution, weigh 7mmol sodium carbonate, configure it into a 20mmol / L sodium carbonate solution; mix the above two solutions at a speed of 400 rpm to form a gel The substance was continuously stirred for 4 hours. During the stirring process, sodium carbonate and silver nitrate reacted to generate silver carbonate colloid; the silver carbonate colloid was placed in a semi-permeable membrane bag, washed 4 times with distilled water to remove free ions, and then the silver carbonate colloid was The colloid was added to 70 mL of sodium bromide solution with a concentration of 4 mol / L, soaked for 3 days, and silver bromide nanoparticles were formed on the surface of silver carbonate particles, separated from solid and liquid, washed with deionized water for 3 times, and dried at 95 ° C to prepare A silver carbonate composite silver bromide photocatalyst is obtained.

[0019] Add 0.5 g of the o...

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PUM

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Abstract

The invention discloses a preparation method of a silver carbonate compounded silver bromide photocatalyst. The preparation method particularly includes the steps: weighing 12-16mmol of silver nitrate to prepare into 15mmol / L silver nitrate solution, and weighing 6.6-8mmol of sodium carbonate to prepare into 20mmol / L sodium carbonate solution; mixing the silver nitrate solution and the sodium carbonate solution at the rotating speed of 350-400 revolutions / minute to form gelatinous substances, continually stirring the gelatinous substances for 3-4h, and enabling the sodium carbonate and the silver nitrate to react in the stirring process to generate silver carbonate colloids; washing the silver carbonate colloids in semi-permeable membrane bags for 3-4 times by the aid of distilled water to remove free ions, adding the silver carbonate colloids into 160-180mL of sodium bromide solution with the concentration of 1-2mol / L to soak for 2-4 days, forming silver bromide nano-particles on the surfaces of silver carbonate particles, performing solid-liquid separation, washing the solid for 2-3 times by the aid of distilled water, and drying the solid at the temperature ranging from 75 DEG C to 105 DEG C to prepare the silver carbonate compounded silver bromide photocatalyst. According to the method, the catalyst is formed on the surface of a carrier, and the catalyst and the carrier are closely combined.

Description

technical field [0001] The invention relates to a preparation method of a silver carbonate composite silver bromide photocatalyst, belonging to the technical field of sewage treatment in environmental protection. Background technique [0002] Traditional water treatment methods have problems such as low efficiency, high cost, and secondary pollution, and sewage treatment has not been well resolved. The development and application of nanotechnology is likely to completely solve this problem. TiO was discovered in 1972 2 High oxidation activity, good chemical stability, non-toxic to the human body, low cost, no pollution, wide application range, so it is the most important, but TiO 2 The bandgap width is large (such as anatase TiO 2 The forbidden band width Eg=3.2eV), can only absorb the light in the ultraviolet region (wavelength less than 387nm), and the utilization efficiency of solar energy is low. [0003] Semiconductor photocatalysis is one of the most promising appr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/232C02F1/32
CPCC02F1/32B01J27/232C02F2101/308B01J35/39Y02W10/37
Inventor 徐广永赵文昌冯婷
Owner CHANGZHOU UNIV
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