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Treatment method of dye wastewater

A dye wastewater, treatment method technology, applied in water/sewage treatment, adsorbed water/sewage treatment, illumination water/sewage treatment, etc. Excellent catalytic performance, promoting effective separation, and the effect of good degradation ability

Active Publication Date: 2021-02-12
上海奥迪菲环境工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to TiO 2 The forbidden band width is large, and the anatase TiO 2 and rutile TiO 2 The band gap energy is 3.2eV and 3.0eV respectively, and it is not easy to transition to generate hole-electron pairs, and it can only absorb ultraviolet light, but has no response to visible light with a wide wavelength range, which limits its photocatalytic application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of preparation method of lutetium and praseodymium co-doped zinc oxide / graphene composite photocatalyst, comprises the following steps:

[0029] (1) Add zinc nitrate and hexamethylenetetramine to 180mL deionized water in turn to form a mixed solution, wherein the concentration of zinc nitrate is 0.03mol / L, and the concentration of hexamethylenetetramine is 0.03mol / L, The magnetic stirring speed is 350rpm, and the stirring time is 30min;

[0030] (2) Add lutetium nitrate, praseodymium nitrate and graphene oxide to the above-mentioned mixed solution, and continue to stir for 30min to obtain a mixed solution; wherein the molar ratio of said lutetium nitrate to said zinc nitrate is 0.02; said praseodymium nitrate and said zinc nitrate The mol ratio of zinc nitrate is 0.03;

[0031] (3) Transfer the above mixed solution to a polytetrafluoroethylene autoclave and react at 100°C for 16 hours. After the reaction, cool to room temperature, centrifuge, wash with deionized...

Embodiment 2

[0033] A kind of preparation method of lutetium and praseodymium co-doped zinc oxide / graphene composite photocatalyst, comprises the following steps:

[0034] (1) Add zinc chloride and hexamethylenetetramine to 200mL deionized water in turn to form a mixed solution, wherein the concentration of zinc chloride is 0.04mol / L, and the concentration of hexamethylenetetramine is 0.04mol / L L, the rotating speed of magnetic stirring is 400rpm, stirring time 20min;

[0035] (2) Add lutetium chloride, praseodymium acetate and graphene oxide to the above-mentioned mixed solution, continue stirring for 40min to obtain a mixed solution; the mol ratio of the lutetium chloride to the zinc chloride is 0.03; the praseodymium acetate and the The mol ratio of described zinc chloride is 0.02;

[0036] (3) Transfer the above mixed solution to a polytetrafluoroethylene high-pressure reactor and react at 110°C for 10 hours. After the reaction, cool to room temperature, centrifuge, then wash with dei...

Embodiment 3

[0038] A kind of preparation method of lutetium and praseodymium co-doped zinc oxide / graphene composite photocatalyst, comprises the following steps:

[0039] (1) Add zinc acetate and hexamethylenetetramine to 150mL deionized water in turn to form a mixed solution, wherein the concentration of zinc acetate is 0.02mol / L, and the concentration of hexamethylenetetramine is 0.02mol / L ; The rotating speed of magnetic stirring is 300rpm, stirs 40min;

[0040] (2) Add lutetium acetate, praseodymium chloride and graphene oxide to the above-mentioned mixed solution, and continue to stir for 20min to obtain a mixed solution; the mol ratio of the lutetium acetate to the zinc acetate is 0.01; the praseodymium chloride and the The mol ratio of zinc acetate is 0.04;

[0041](3) Transfer the above mixed solution to a polytetrafluoroethylene high-pressure reactor and react at 90°C for 20 hours. After the reaction, cool to room temperature, centrifuge, then wash twice with deionized water and...

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PUM

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Abstract

The invention discloses a treatment method of dye wastewater. According to the method, organic dye in dye wastewater can be effectively degraded by utilizing the photocatalytic performance of the lutetium and praseodymium co-doped zinc oxide / graphene composite photocatalyst under the irradiation of visible light, the absorption intensity of the visible light is promoted by utilizing the synergistic effect of lutetium and praseodymium under the irradiation of the visible light, and the organic pollution treatment capacity of the photocatalyst is improved, particularly, methyl orange and rhodamine B can be well degraded, the preparation method of the photocatalyst is simple, and the photocatalyst is an ideal material for treating dye wastewater.

Description

technical field [0001] The invention relates to the field of organic wastewater treatment, in particular to a treatment method for dye wastewater. Background technique [0002] For a long time, environmental problems have been facing huge adjustments. For quite a long time, people have been working on researching a green and efficient photocatalyst to deal with environmental pollution. Titanium dioxide (TiO 2 ), due to its non-toxic, stable chemical properties and low cost, it has been widely studied and applied. However, due to TiO 2 The forbidden band width is large, and the anatase TiO 2 and rutile TiO 2 The bandgap energy is 3.2eV and 3.0eV respectively, and it is not easy to transition to generate hole-electron pairs, and it can only absorb ultraviolet light, but has no response to visible light with a wide range of wavelengths, which limits its photocatalytic application. [0003] In order to expand photocatalysts, researchers found that ZnO is an important direct...

Claims

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Application Information

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IPC IPC(8): C02F1/30C02F1/28B01J23/10B01J37/10B01J37/16C02F101/30C02F101/38C02F101/34
CPCC02F1/30C02F1/283B01J23/10B01J37/10B01J37/16C02F2101/34C02F2101/38C02F2101/308B01J35/39Y02W10/37
Inventor 曾福海
Owner 上海奥迪菲环境工程有限公司
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