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AC/g-C3N4 composite photocatalytic material and preparation method thereof

A composite photocatalysis, g-c3n4 technology, applied in the field of photocatalytic materials, can solve the problem of lack of chromium wastewater treatment, and achieve the effects of improving photoelectrochemical performance, good application prospects, and low cost

Inactive Publication Date: 2020-05-01
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] One of the objects of the present invention is to propose an AC / g-C 3 N 4 The composite photocatalytic material and its preparation method solve the technical problem of the lack of effective photocatalytic materials in the prior art to treat chromium wastewater

Method used

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  • AC/g-C3N4 composite photocatalytic material and preparation method thereof
  • AC/g-C3N4 composite photocatalytic material and preparation method thereof

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preparation example Construction

[0043] According to a preferred embodiment, AC / g-C of the present invention 3 N 4 The preparation method of composite photocatalytic material comprises the following steps:

[0044] Put the dicyandiamide into the muffle furnace for calcination, wherein the calcination temperature is 550°C, after the temperature of the muffle furnace rises to the calcination temperature at a heating rate of 5°C / min, keep it warm for 3 hours, then cool naturally, and the obtained solid substance Grinding to obtain g-C 3 N 4 powder.

[0045] According to g-C 3 N 4 The mass ratio of the powder to the activated carbon powder is 1: 0.5% to 10%, and the ingredients are mixed to obtain a mixture; the mixture is added to ultrapure water, anhydrous methanol or anhydrous ethanol, stirred, and the pH of the mixture is adjusted to 1~ 7. Then ultrasonicate the mixed solution for 2 hours to obtain a complete mixed solution; put the complete mixed solution into an autoclave, put it in a vacuum drying ov...

Embodiment 1

[0047] Put dicyandiamide into a muffle furnace for calcination, wherein the calcination temperature is 550°C, after the muffle furnace rises to the calcination temperature at a heating rate of 5°C / min, keep it warm for 3 hours, then cool naturally, and the solid material obtained by calcination Grinding to obtain g-C 3 N 4 powder.

[0048] Press g-C 3 N 4 The mass ratio of powder:activated carbon powder is 1:0.5% batching and mixing to obtain a mixture. The mixture was added into ultrapure water, stirred, and the pH of the mixture was adjusted to 3, and then the mixture was sonicated for 2 h to obtain a complete mixture. Pour the complete mixture into an autoclave, put it in a vacuum drying oven, and keep it warm at 180°C for 4 hours. After cooling to room temperature, take out the solution in the autoclave and bake it at 90°C for 9 hours to obtain AC / g -C 3 N 4 Composite photocatalytic material, i.e. g-C 3 N 4 / AC-0.5wt% composite photocatalytic material.

Embodiment 2

[0050] Put dicyandiamide into a muffle furnace for calcination, wherein the calcination temperature is 550°C, after the muffle furnace rises to the calcination temperature at a heating rate of 5°C / min, keep it warm for 3 hours, then cool naturally, and the solid material obtained by calcination Grinding to obtain g-C 3 N 4 powder.

[0051] Press g-C 3 N 4 The mass ratio of powder: activated carbon powder is 1: 2.5% batching and mixing to obtain a mixture. The mixture was added into ultrapure water, stirred, and the pH of the mixture was adjusted to 3, and then the mixture was sonicated for 2 h to obtain a complete mixture. Pour the complete mixture into an autoclave, put it in a vacuum drying oven, and keep it warm at 180°C for 4 hours. After cooling to room temperature, take out the solution in the autoclave and bake it at 90°C for 9 hours to obtain AC / g -C 3 N 4 Composite photocatalytic material, i.e. g-C 3 N 4 / AC-2.5wt% composite photocatalytic material.

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Abstract

The invention discloses an AC / g-C3N4 composite photocatalytic material and a preparation method thereof, and relates to the technical field of photocatalytic materials. The AC / g-C3N4 composite photocatalytic material and the preparation method thereof in the invention solve the technical problem of lack of an effective photocatalytic material for treating chromium-containing wastewater in the prior art. The preparation method for the AC / g-C3N4 composite photocatalytic material provided by the invention comprises the following steps: calcining dicyandiamide serving as a precursor so as to obtain g-C3N4 powder, proportioning the g-C3N4 powder and active carbon powder in proportion, and preparing the AC / g-C3N4 composite photocatalytic material by a hydrothermal method. The AC / g-C3N4 compositephotocatalytic material and the preparation method thereof have the advantages of low cost, simple process and environmental friendliness, can effectively treat the chromium-containing wastewater under the irradiation of visible light, and have good application prospects.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to an AC / g-C 3 N 4 Composite photocatalytic material and preparation method thereof. Background technique [0002] In recent years, with the improvement of people's living standards, environmental pollution has gradually increased, so environmental issues have become one of the main issues that the world is concerned about. In the domestic metallurgical and chemical industry, every ton of sodium dichromate produced will produce 3-3.5 tons of chromium slag, and about 200,000-300,000 tons of chromium slag need to be discharged every year. The harmful components in chromium slag are mainly hexavalent chromium ions such as soluble sodium chromate and acid-soluble calcium chromate. Hexavalent chromium ions are very harmful to human health, and its compounds have a strong oxidation effect, which is harmful to the human digestive tract, respiratory tract, skin and mucou...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10C02F1/30C02F1/70C02F101/22
CPCB01J27/24C02F1/30C02F1/70C02F2101/22C02F2305/10B01J35/613B01J35/633B01J35/647B01J35/39
Inventor 梁娟李建军刘佳旻林钰凯
Owner SICHUAN UNIV
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