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Catalytic material, preparation method thereof and photocatalyst

A technology of catalytic materials and powders, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as narrow pH range, low cycle efficiency, low photocatalytic quantum efficiency, etc., to achieve Effects of widening pH range, high cycle efficiency, and increasing degradation rate

Active Publication Date: 2020-06-05
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a catalytic material to solve the problems of low cycle efficiency, low photocatalytic quantum efficiency and narrow pH application range in the existing layered double metal hydroxide catalytic material proposed in the above background technology

Method used

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  • Catalytic material, preparation method thereof and photocatalyst
  • Catalytic material, preparation method thereof and photocatalyst
  • Catalytic material, preparation method thereof and photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of catalytic material, concrete preparation method is as follows:

[0044] 1) Weigh 0.6g of urea and 3g of citric acid monohydrate at room temperature (the molar ratio of urea to citric acid monohydrate is 71%), add them to 30mL of deionized water and stir to obtain a uniform mixed solution, put it in a microwave oven Carry out microwave heating and baking to obtain a yellow-black viscous liquid, then put it in an oven to dry at 85°C, and grind to obtain a powder; then add the powder to deionized water for stirring and dissolving, and the obtained solution is dialyzed with a 200D dialysis membrane , put into an oven after dialysis, dry at 80°C, and grind to obtain N-CQDs powder;

[0045] 2) Weigh 2.3665 g of ferric chloride and 4.3775 g of copper sulfate pentahydrate, put them into 300 mL of deionized water together, stir with a magnetic stirrer until completely dissolved, obtain a uniform first solution, and record it as liquid A;

[0046] 3) Weigh 3g of NaOH a...

Embodiment 2

[0050] Weigh 2.3665g of ferric chloride and 4.3775g of copper sulfate pentahydrate at room temperature, put them into 300mL of deionized water, stir with a magnetic stirrer until completely dissolved, and record it as liquid A; then weigh 3g of sodium hydroxide and dissolve it in 200mL The alkaline solution obtained in deionized water is recorded as liquid B; a small amount of liquid B is added dropwise to 600mL of deionized water to make the pH about 9, which is recorded as liquid C; Stirring, at the same time, slowly drop the A liquid into the C liquid, and drop the B liquid at the same time to keep the pH at about 9, obtain the second solution after the end of the drop A liquid, and heat and concentrate the second solution to 80mL, stop heating, continue to stir for 12h to make it age, then put it into a polytetrafluoroethylene reactor, and conduct a hydrothermal reaction at a temperature of 105°C for 8 hours. Wash with water to make the pH of the supernatant after centrifu...

Embodiment 3

[0052] The CuFe-LDH / N-CQDs prepared in Example 1 and the CuFe-LDH prepared in Example 2 are carried out the photo-Fenton reaction degradation MB (MethyleneBlue, methylene blue) test, specifically, the methylene blue that takes concentration is 10mg / L Put 80mg of the solution into a 100mL small beaker, add 100μL of H 2 o 2 and 0.003g of the test sample (the CuFe-LDH / N-CQDs prepared in Example 1 or the CuFe-LDH prepared in Example 2), then stir with a magnetic stirrer and irradiate the simulated sunlight with a 500W xenon lamp to provide a light source, each Take a sample every 5 minutes, react for 0.5 hours altogether, test the absorbance (λ=664) of each sample with a UV spectrophotometer, and also test the total organic carbon (TOC, Total organic carbon) concentration of the MB solution during the photodegradation process Dynamic monitoring was carried out; at the same time, a control group that kept other conditions and operating steps unchanged except for the addition of te...

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Abstract

The invention relates to the technical field of water treatment, and particularly discloses a catalytic material and a preparation method thereof, and a photocatalyst, the catalytic material comprisesthe following raw materials: N-CQDs powder and CuFe-LDH dispersion liquid; wherein the CuFe-LDH dispersion liquid is prepared from the following raw materials: a ferric iron source, a bivalent coppersource and a proper amount of alkaline solution. According to the preparation method, CuFe-LDH and nitrogen-doped carbon quantum dots are compounded to obtain the catalytic material; the preparationmethod is simple, the cycle efficiency is high, repeated recycling can be achieved, the pH range of the photo-Fenton reaction is widened, and the problems that an existing layered double hydroxide catalytic material is low in metal redox cycle efficiency and photocatalytic quantum efficiency, the efficiency of degrading organic pollutants in water through the photo-Fenton reaction is low, and thepH application range is narrow are solved. The provided preparation method is simple, the prepared catalytic material promotes the circulation of Fe < 3 + > / Fe < 2 + > and Cu < 3 + > / Cu < 2 + > redoxpairs, and the photocatalytic quantum efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a catalytic material, a preparation method thereof, and a photocatalyst. Background technique [0002] With the vigorous development of industrialization, the content of refractory organic pollutants in wastewater has been increasing. As an important means of organic wastewater treatment, advanced oxidation technology has gradually occupied an important position in the field of water treatment. Among them, the Fenton method is a very widely used advanced oxidation technology. The traditional Fenton method means that hydrogen peroxide generates hydroxyl radicals under the catalysis of ferrous iron, and then the organic pollutants in sewage are oxidized and decomposed by hydroxyl radicals. However, the applicable pH range of the traditional Fenton method is small, and it can only effectively occur under acidic conditions with a pH of 2-4, and it needs to consume a large am...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/30
CPCB01J27/24C02F1/30C02F2101/308C02F2101/40C02F2305/10B01J35/39
Inventor 安永磊杜兴源刘璐
Owner JILIN UNIV
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