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Composite photocatalyst for treating organic pollutants in wastewater as well as preparation method and application of composite photocatalyst

A technology for organic pollutants and wastewater treatment, which is used in catalyst activation/preparation, water pollutants, physical/chemical process catalysts, etc. It can solve the problems of low utilization of sunlight, lack of research on photocatalytic effects, etc., and improve the conductivity. , The effect of improving photocatalytic performance and convenient operation

Pending Publication Date: 2022-05-13
王美珍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although Bi has been studied in the prior art 2 o 3 and bismuth silicate etc. as photocatalysts, but the utilization rate of the above-mentioned photocatalysts to sunlight is still on the low side, and there is no research on the photocatalytic effect after combining the two. Excellent photocatalytic performance, excellent degradation ability for organic pollutants in wastewater

Method used

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  • Composite photocatalyst for treating organic pollutants in wastewater as well as preparation method and application of composite photocatalyst

Examples

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Effect test

Embodiment 1

[0030] A preparation method of a composite photocatalyst for treating organic pollutants in wastewater, the preparation method comprising the following steps:

[0031] (1) Dissolve 1 mol of bismuth nitrate, 0.02 mol of copper nitrate and 0.03 mol of nickel nitrate into 65 mL of ethylene glycol solvent, then add 4 mol of urea and continue to stir for 30 min, then react in hydrothermal reaction at 150 °C for 16 h, centrifuge the solid after the reaction Separation, washing with deionized water for 3 times, and drying at 90°C for 13 hours to obtain bismuth oxide co-doped with copper and nickel;

[0032] (2) Take the copper and nickel co-doped bismuth oxide prepared in step 1) and add the ethylene glycol solution of 1mol / L bismuth nitrate to 20mL, get 10mL concentration and add the sodium metasilicate aqueous solution that is 1mol / L In the ethylene glycol solution of bismuth, stir magnetically for 35 minutes; slowly add aqueous sodium hydroxide solution dropwise under stirring con...

Embodiment 2

[0034] A preparation method of a composite photocatalyst for treating organic pollutants in wastewater, the preparation method comprising the following steps:

[0035] (1) Dissolve 1 mol of bismuth acetate, 0.03 mol of copper chloride and 0.02 mol of nickel nitrate in 70 mL of ethanol solvent, then add 5 mol of urea and continue to stir for 40 min, then perform a hydrothermal reaction at 160°C for 14 h, and centrifuge the solid after the reaction , washed with deionized water for 3 times, and dried at 100°C for 10 hours to obtain bismuth oxide co-doped with copper and nickel;

[0036](2) Take the copper and nickel co-doped bismuth oxide prepared in step 1) and add it to the ethanol solution of 1mol / L bismuth chloride of 30mL, get 15mL of concentration and add the sodium metasilicate aqueous solution that is 1mol / L to the chloride In the ethanol solution of bismuth, stir magnetically for 40 minutes; slowly add potassium hydroxide aqueous solution dropwise under stirring conditi...

Embodiment 3

[0038] A preparation method of a composite photocatalyst for treating organic pollutants in wastewater, the preparation method comprising the following steps:

[0039] (1) Dissolve 1 mol of bismuth acetate, 0.01 mol of copper nitrate and 0.04 mol of nickel chloride into 60 mL of glycerol solvent, then add 3 mol of urea and continue to stir for 20 min, then perform a hydrothermal reaction at 140 ° C for 18 h, and after the reaction, the solid centrifuged, washed with deionized water three times, and dried at 80°C for 16 hours to obtain bismuth oxide co-doped with copper and nickel;

[0040] (2) Get the copper and nickel co-doped bismuth oxide that will step 1) prepare and add the glycerin solution of 1mol / L bismuth acetate of 10mL, get 5mL concentration and add the sodium metasilicate aqueous solution that is 1mol / L to acetic acid In bismuth glycerol, stir magnetically for 30 minutes; slowly add ammonia solution dropwise under stirring conditions to adjust pH = 10; continue sti...

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Abstract

The invention belongs to the technical field of wastewater treatment, and particularly relates to a composite photocatalyst for treating organic pollutants in wastewater as well as a preparation method and application of the composite photocatalyst. The preparation method comprises the following steps: dissolving a bismuth salt, a copper salt and a nickel salt in an alcohol solvent, adding urea, continuously stirring, carrying out hydrothermal treatment, carrying out a reaction, and carrying out centrifugal separation, washing and drying on the obtained solid to obtain copper and nickel co-doped bismuth oxide; the preparation method comprises the following steps: adding prepared copper and nickel co-doped bismuth oxide into an alcoholic solution of bismuth salt, adding a certain amount of a sodium metasilicate aqueous solution into the alcoholic solution of bismuth salt, magnetically stirring, slowly dropwise adding an alkali solution under a stirring condition to adjust the pH value, continuously stirring, carrying out hydrothermal treatment, cooling to room temperature, washing and drying to obtain the composite photocatalyst. The composite photocatalyst prepared by element doping and compounding can effectively perform photodegradation treatment on organic pollutants in wastewater.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment. More specifically, it relates to a composite photocatalyst for treating organic pollutants in wastewater, its preparation method and application. Background technique [0002] With the deepening of industrialization, the problem of environmental pollution is becoming more and more serious. Photocatalysis technology is considered to be an effective method to solve this problem. Photocatalysis technology (Photocatalysis, PC) uses light and catalyst to work together, and the catalyst is excited by light to generate photogenerated electrons. -hole pair (e - -h + ), generating active groups with strong oxidizing ability, which can degrade organic pollutants, which is an advanced oxidation technology. Photocatalytic technology has the advantages of wide applicability, mild reaction conditions, and the use of sunlight. It meets the requirements of the concept of "green chemistry" and has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/843B01J37/10C02F1/30C02F101/38C02F101/34
CPCB01J23/843B01J37/10C02F1/30C02F2101/34C02F2101/38C02F2101/40C02F2305/10B01J35/39
Inventor 王美珍
Owner 王美珍
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