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Preparation method and application of two-dimensional thin layer CdS/g-C3N4 composite photocatalyst

A g-c3n4, composite light technology, applied in physical/chemical process catalysts, chemical instruments and methods, water/sewage treatment, etc., can solve problems such as restricting practical application, high cost, secondary pollution, etc., to improve visible light response. Ability, simple operation effect

Inactive Publication Date: 2019-03-01
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, traditional water pollution control methods still have common problems such as high cost, low efficiency, and easy to produce secondary pollution, which greatly restricts the practical application of related methods in the field of sewage treatment.

Method used

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  • Preparation method and application of two-dimensional thin layer CdS/g-C3N4 composite photocatalyst
  • Preparation method and application of two-dimensional thin layer CdS/g-C3N4 composite photocatalyst
  • Preparation method and application of two-dimensional thin layer CdS/g-C3N4 composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Two-dimensional thin-layer g-C 3 N 4 Precursor preparation:

[0032] Put 10g of urea into an alumina crucible, and calcine it in a muffle furnace at a high temperature of 550°C (the heating rate is 5°C / min) for 4h;

[0033] (2) Two-dimensional thin-layer g-C 3 N 4 Preparation of nanosheets:

[0034] The two-dimensional thin layer g-C 3 N 4 The precursor was added to the nitric acid solution with pH = 1, stirred for 8 hours under the condition of heating in water at 80°C, and then the obtained sample was washed several times, dried in vacuum at 60°C, and then calcined at 500°C for 2 hours, and then cooled to room temperature , Grinding to get two-dimensional thin layer g-C 3 N 4 Nanosheets.

[0035] (3) Two-dimensional thin layer CdS / g-C 3 N 4 Preparation of composite photocatalyst:

[0036] The sample obtained in 100mg (2) was mixed with 50ml of Cd(NO 3 ) 2 The aqueous solution was sonicated for 10 minutes, and after complete dispersion, the sample was...

Embodiment 2

[0039] (1) Two-dimensional thin-layer g-C 3 N 4 Precursor preparation:

[0040] Put 10g of urea into an alumina crucible, and calcine it in a muffle furnace at a high temperature of 550°C (the heating rate is 5°C / min) for 4h;

[0041] (2) Two-dimensional thin-layer g-C 3 N 4 Preparation of nanosheets:

[0042] The two-dimensional thin layer g-C 3 N 4 The precursor was added to the nitric acid solution with pH = 1, stirred for 8 hours under the condition of heating in water at 80°C, and then the obtained sample was washed several times, dried in vacuum at 60°C, and then calcined at 500°C for 2 hours, and then cooled to room temperature , Grinding to get two-dimensional thin layer g-C 3 N 4 Nanosheets.

[0043] (3) Two-dimensional thin layer CdS / g-C 3 N 4 Preparation of composite photocatalyst:

[0044] The sample obtained in 100mg (2) was mixed with 50ml of Cd(NO 3 ) 2 The aqueous solution was ultrasonically treated for 10 minutes. After being completely dispersed...

Embodiment 3

[0047] (1) Two-dimensional thin-layer g-C 3 N 4 Precursor preparation:

[0048] Put 10g of urea into an alumina crucible, and calcine it in a muffle furnace at a high temperature of 550°C (the heating rate is 5°C / min) for 4h;

[0049] (2) Two-dimensional thin-layer g-C 3 N 4 Preparation of nanosheets:

[0050] The two-dimensional thin layer g-C 3 N 4 The precursor was added to the nitric acid solution with pH = 1, stirred for 8 hours under the condition of heating in water at 80°C, and then the obtained sample was washed several times, dried in vacuum at 60°C, and then calcined at 500°C for 2 hours, and then cooled to room temperature , Grinding to get two-dimensional thin layer g-C 3 N 4 Nanosheets.

[0051] (3) Two-dimensional thin layer CdS / g-C 3 N 4 Preparation of composite photocatalyst:

[0052] The sample obtained in 100mg (2) was mixed with 50ml of Cd(NO 3 ) 2 The aqueous solution was sonicated for 10 minutes, and after complete dispersion, the sample was...

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Abstract

The invention provides a preparation method and application of a two-dimensional thin layer CdS / g-C3N4 composite photocatalyst. The preparation method comprises the following preparation steps that 1,urea is placed in a muffle furnace for high-temperature calcination to obtain a two-dimensional thin layer g-C3N4 precursor; 2, the two-dimensional thin layer g-C3N4 precursor is added to a nitric acid solution and subjected to stirring treatment under the condition of heating in a water bath, an obtained solid sample is washed to neutral, vacuum-dried, calcined, cooled to the room temperature and then ground, and a two-dimensional thin layer g-C3N4 nanosheet is obtained; and 3, the two-dimensional thin layer g-C3N4 nanosheet is subjected to ultrasonic treatment in a solution containing Cd<2+>, centrifugation is performed, an obtained solid is added to a solution containing S<2-> for ultrasonic treatment continuously, and the two-dimensional thin layer CdS / g-C3N4 composite photocatalyst is obtained. According to the preparation method and application of the two-dimensional thin layer CdS / g-C3N4 composite photocatalyst, the two-dimensional thin layer g-C3N4 nanosheet is prepared by simple and convenient calcination, acid treatment and secondary calcination, and the high-efficiency two-dimensional thin layer CdS / g-C3N4 composite photocatalyst is prepared by a simple successive ioniclayer adsorption and reaction method.

Description

technical field [0001] The invention belongs to the technical field of preparation of environmental protection materials, in particular to a two-dimensional thin layer CdS / g-C 3 N 4 Preparation method and application of composite photocatalyst. Background technique [0002] The rapid economic and social development, on the one hand, has brought convenience to people's material life, on the other hand, it has also brought serious environmental problems. Among them, water pollution is becoming more and more serious, which directly affects the survival of human beings and all living things on the earth. Governments and researchers from all over the world have never stopped exploring water pollution control, and have developed a variety of effective water pollution control methods, such as activated carbon adsorption, biofilm, activated sludge and other methods. However, traditional water pollution control methods still have common problems such as high cost, low efficiency, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F1/72C02F101/34C02F101/36C02F101/38
CPCC02F1/30C02F1/725B01J27/24C02F2305/10C02F2101/36C02F2101/34C02F2101/38C02F2101/308B01J35/393B01J35/39B01J35/23B01J35/399
Inventor 李鑫吴东遥周亚举刘重阳李金择马长畅霍鹏伟闫永胜
Owner JIANGSU UNIV
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