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Recoverable zinc oxide photocatalyst for sewage treatment and preparation method of recoverable zinc oxide photocatalyst

A technology of sewage treatment and photocatalyst, which is applied in the direction of physical/chemical process catalyst, light water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of complex photocatalyst preparation technology, limited development and application, low catalytic activity, etc. problems, to achieve the effect of easy control, simplified separation process and high photocatalytic activity

Inactive Publication Date: 2018-08-03
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the recyclability of supported composite photocatalysts which are currently widely used, but the carrier leads to low catalytic activity and poor photocatalytic degradation of pollutants, while the preparation technology of photocatalysts with core-shell magnetically separable structures is complex and energy-consuming , the cost is high, which limits the development and application. The present invention proposes a recyclable zinc oxide photocatalyst and preparation method for sewage treatment, thereby effectively realizing the utilization of the photocatalyst and improving the photocatalytic activity.

Method used

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  • Recoverable zinc oxide photocatalyst for sewage treatment and preparation method of recoverable zinc oxide photocatalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation process is:

[0032] (1) Add methyl cellulose and emulsifier OP-10 to benzyl alcohol, stir until it is clear, add water-soluble silicon source, stir and emulsify for 16 minutes, and rotate at 68°C under reduced pressure until all the water is evaporated. Ionized water and absolute ethanol were washed separately, dried in vacuum at 56°C, further dispersed in dilute ammonia water for heating treatment, and then washed to neutrality, and placed in a muffle furnace for temperature-programmed roasting to prepare porous silica microspheres ; The water-soluble silicon source is prepared by the catalytic hydrolysis of polyethyl silicate with hydrochloric acid; the ammonia concentration of ammonia water heat treatment is 9%, the temperature is 36℃; the roasting temperature is 660℃, and the time is 1h; in the reaction system, methyl fiber 7 parts by weight of vegetarian, 1 part by weight of emulsifier, 69 parts by weight of benzyl alcohol, 23 parts by weight of water...

Embodiment 2

[0041] The preparation process is:

[0042] (1) Add methyl cellulose and emulsifier OP-10 to benzyl alcohol, stir until it is clear, add water-soluble silicon source, stir and emulsify for 10 minutes, and rotate at 65°C under reduced pressure until all the water is evaporated. Ionized water and absolute ethanol were washed separately, dried in vacuum at 50°C, further dispersed in dilute ammonia water for heating treatment, washed to neutrality, and placed in a muffle furnace for temperature-programmed roasting to prepare porous silica microspheres The water-soluble silicon source is prepared by catalytic hydrolysis of polyethyl silicate with hydrochloric acid; the ammonia concentration of ammonia water heat treatment is 9%, the temperature is 30℃; the roasting temperature is 600℃, the time is 1h; in the reaction system, methyl fiber 5 parts by weight of vegetarian, 1 part by weight of emulsifier, 74 parts by weight of benzyl alcohol, and 20 parts by weight of water-soluble silico...

Embodiment 3

[0051] The preparation process is:

[0052] (1) Add methyl cellulose and emulsifier OP-10 to benzyl alcohol, stir until it is clear, add water-soluble silicon source, stir and emulsify for 20 minutes, and rotate at 75°C under reduced pressure until all the water is evaporated. Ionized water and absolute ethanol were washed separately, dried in vacuum at 60℃, further dispersed in dilute ammonia water for heating treatment, and then washed to neutrality, and placed in a muffle furnace for temperature-programmed roasting to prepare porous silica microspheres ; The water-soluble silicon source is prepared by catalytic hydrolysis of polyethyl silicate with hydrochloric acid; the ammonia concentration of ammonia water heat treatment is 10%, the temperature is 40℃; the roasting temperature is 700℃, and the time is 1h; in the reaction system, methyl fiber 8 parts by weight of vegetarian, 2 parts by weight of emulsifier, 65 parts by weight of benzyl alcohol, 25 parts by weight of water-so...

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Abstract

The invention provides a recoverable zinc oxide photocatalyst for sewage treatment and a preparation method of the recoverable zinc oxide photocatalyst. The preparation method comprises the followingsteps of utilizing reaction of methylcellulose, an emulsifier OP-10, a water-soluble silicon source and benzyl alcohol to prepare porous silicon dioxide microspheres, adding bismuth nitrate, strontiumferrate and sodium dodecylbenzene sulfonate to prepare a mixed aqueous solution, performing hydrothermal reaction to obtain bismuth based strontium loading magnetic porous silicon dioxide microspheres, and dispersing the bismuth based strontium loading magnetic porous silicon dioxide microspheres and zinc nitrate hexahydrate in an anhydrous alcohol solution of sodium hydroxide for reaction to obtain the recoverable zinc oxide photocatalyst. By adopting the bismuth based strontium loading magnetic porous silicon dioxide microspheres with strongere adsorption performance and high specific surface area as a carrier, the recoverable zinc oxide photocatalyst is improved in photocatalytic activity and good in effect of catalytically degrading pollutants; and meanwhile, the photocatalyst can berecovered by effectively utilizing a magnetic technology, so that the separation process is simplified, the operation cost is low, and the whole preparation process is simple, is liable to control andlow in cost and can be widely used for sewage treatment.

Description

Technical field [0001] The invention relates to the field of sewage treatment, in particular to the preparation of photocatalysts, and in particular to a recyclable zinc oxide photocatalyst for sewage treatment and a preparation method. Background technique [0002] my country is short of water resources and is also facing severe water pollution problems. With the continuous development of industry, environmental pollution is becoming more and more serious, and people's requirements for the environment continue to increase. The physical and biological methods in traditional water treatment processes often fail to obtain satisfactory results. As a new water treatment technology that has emerged in the past 20 years, photocatalytic oxidation technology has been universally recognized because of its low cost and no secondary pollution. The purpose of our research is to select efficient catalysts, explore the best operating parameters, seek the best solutions, and improve the decomp...

Claims

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Application Information

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IPC IPC(8): B01J23/644C02F1/30
CPCC02F1/30B01J23/6447C02F2305/10B01J35/33B01J35/39
Inventor 陈庆司文彬
Owner CHENDU NEW KELI CHEM SCI CO LTD