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Zinc-oxide nanocrystal composite photocatalyst for treating sewage and preparation method

A zinc oxide nanocrystal, sewage treatment technology, applied in physical/chemical process catalysts, light water/sewage treatment, water/sludge/sewage treatment, etc., can solve the complex preparation and use process, low visible light adsorption efficiency, spectral The problem of small response range, etc., to achieve the effect of simple and feasible process, improved photocatalytic efficiency, and broadened spectral response range

Inactive Publication Date: 2018-06-29
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, the widely used photocatalysts for sewage purification have problems such as low absorption coefficient, small spectral response range, low adsorption efficiency for visible light, low photocatalytic efficiency, complicated preparation and use process, and high cost. The present invention proposes a Zinc oxide nanocrystalline composite photocatalyst and preparation method for sewage treatment can effectively solve the above technical problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) First add zinc acetate to diethylene glycol, place it in an oil bath under vigorous stirring, then heat it to 85°C, connect the reflux device, continue heating to 160°C, and react with alcoholysis for 10 minutes to form Zinc oxide emulsion, continue to reflux and stir for 60 minutes, and then centrifuge demulsification, washing, and drying to obtain zinc oxide nanocrystals; the speed of vigorous stirring is 2500r / min; the speed of heating and heating is 1°C / min; the centrifugal speed of demulsification 3500r / min, the time is 4.5h;

[0034] Among the reaction raw materials, in parts by weight: 35 parts of zinc acetate and 65 parts of diethylene glycol.

[0035] (2) First add the zinc oxide nanocrystals prepared in step (1) into the mixed solution of ethylene glycol and water containing selenium source and antimony source, then add cetyltrimethylammonium bromide, stir evenly, Heating to 155°C, hydrothermal reaction for 3 hours, and then centrifugally filtering and dr...

Embodiment 2

[0039] (1) First add zinc acetate to diethylene glycol, put it in an oil bath under vigorous stirring, then heat it to 80°C, connect the reflux device, continue heating to 155°C, alcoholysis for 12 minutes, and form Zinc oxide emulsion, continue to reflux and stir for 50 minutes, and then centrifuge demulsification, washing, and drying to obtain zinc oxide nanocrystals; the speed of vigorous stirring is 2000r / min; the speed of heating and heating is 1°C / min; the centrifugal speed of demulsification 3000r / min, the time is 5h;

[0040] Among the reaction raw materials, in parts by weight, there are 30 parts of zinc acetate and 70 parts of diethylene glycol.

[0041] (2) First add the zinc oxide nanocrystals prepared in step (1) into the mixed solution of ethylene glycol and water containing selenium source and antimony source, then add cetyltrimethylammonium bromide, stir evenly, Heating to 150°C, hydrothermal reaction for 4 hours, and then centrifugally filtering and drying the ...

Embodiment 3

[0045] (1) First add zinc acetate to diethylene glycol, place it in an oil bath under vigorous stirring, then heat it to 90°C, connect the reflux device, continue heating to 165°C, alcoholysis for 8 minutes, and form Zinc oxide emulsion, and then continue to reflux and stir for 70 minutes, and then centrifuge demulsification, washing, and drying to obtain zinc oxide nanocrystals; the speed of vigorous stirring is 3000r / min; the speed of heating and heating is 2°C / min; the centrifugal speed of demulsification is 4000r / min, and the time is 4h;

[0046] In the reaction raw materials, by weight, wherein: 40 parts of zinc acetate, 60 parts of diethylene glycol.

[0047] (2) First add the zinc oxide nanocrystals prepared in step (1) into the mixed solution of ethylene glycol and water containing selenium source and antimony source, then add cetyltrimethylammonium bromide, stir evenly, Heating to 160°C, hydrothermal reaction for 2.5 hours, and then centrifugally filtering and drying...

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Abstract

The invention relates to the field of sewage treatment and discloses a zinc-oxide nanocrystal composite photocatalyst for treating sewage and a preparation method. The preparation method comprises thefollowing preparation processes: (1) adding zinc acetate into diethylene glycol, carrying out oil-bath heating and alcoholysis to generate zinc-oxide emulsion, and carrying out centrifugal demulsification to obtain zinc-oxide nanocrystal; (2) adding the zinc-oxide nanocrystal and hexadecyl trimethyl ammonium bromide into mixed liquid of ethylene glycol containing a selenium source and an antimonysource and water to carry out hydrothermal reaction, and obtaining the zinc-oxide nanocrystal-antimony selenide photocatalyst. Compared with the traditional photocatalyst, the prepared composite photocatalyst has the beneficial effects that the spectral response range is wide, the adsorbing efficiency for visible lights is improved, pollutants in sewage can be degraded in an efficient and catalytic manner, the process is simple, the operation is convenient, the production cost and the use cost are low and large-scale promotion and preparation can be achieved.

Description

technical field [0001] The invention relates to the field of sewage treatment, and discloses a zinc oxide nanocrystal composite photocatalyst for sewage treatment and a preparation method thereof. Background technique [0002] my country's water resources are scarce, and it is facing serious water pollution problems, so water treatment has become a top priority. Water treatment technology is mainly divided into biological treatment technology and physical and chemical treatment technology. With the continuous development of industry, the environmental pollution is becoming more and more serious, and people's requirements for the environment are constantly improving. The physical and biological methods in the traditional water treatment process often cannot obtain satisfactory results. As an emerging new water treatment technology, photocatalytic oxidation technology has attracted widespread attention because of its unique advantages. [0003] Photocatalytic oxidation is a ...

Claims

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Application Information

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IPC IPC(8): B01J27/057C02F1/30C02F101/30
CPCC02F1/30B01J27/0573C02F2305/10C02F2101/30B01J35/39
Inventor 陈庆司文彬
Owner CHENDU NEW KELI CHEM SCI CO LTD
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