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

A technology of g-c3n4, composite light, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of high photogenerated-electron-hole recombination efficiency, limitation, general electron transport ability, etc. , to achieve the effect of improving transmission capacity, simple operation, and improving light reduction ability

Inactive Publication Date: 2019-01-18
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since g-C 3 N 4 The general electron transport ability of monomers, the high recombination efficiency of photogenerated electron-hole pairs, etc., greatly limit the g-C 3 N 4 Applications in the Field of Practical Photocatalysis

Method used

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

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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 with water several times (to neutral), dried in vacuum at 60°C, and then calcined at 500°C for 2 hours. After cooling to room temperature, the two-dimensional thin layer g-C can be obtained by grinding 3 N 4 Nanosheets.

[0035] (3) Preparation of two-dimensional Au / CN composite photocatalyst:

[0036] Mix 100 mg of the sample obtained in (2) with 100 ml of deionized water and ultrasonically until it is completely dispersed, add 1 ml of HAuCl with a ...

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 with water several times, dried in vacuum at 60°C, and then calcined for a second time at 500°C for 2h (the heating rate was 5°C / min), after being cooled to room temperature, the two-dimensional thin layer g-C can be obtained by grinding 3 N 4 Nanosheets.

[0043] (3) Preparation of two-dimensional Au / CN composite photocatalyst:

[0044] Mix 100 mg of the sample obtained in (2) with 100 ml of deionized water and ultrasonically until it is completely...

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 with water for several times, dried in vacuum at 60°C, and then calcined for a second time 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) Preparation of two-dimensional Au / CN composite photocatalyst:

[0052] Mix 100 mg of the sample obtained in (2) with 100 ml of deionized water and ultrasonically until completely dispersed, add 10 ml of HAuCl with a concentra...

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Abstract

The invention belongs to the technical field of preparation of environmental protection materials, and provides a preparation method and application of a two-dimensional thin-layer Au / g-C3N4 compositephotocatalyst. The preparation method comprises the following steps: 1, placing urea in an aluminum oxide crucible, calcining the urea in a muffle furnace, and obtaining a two-dimensional thin-layerg-C3N4 precursor; 2, adding the two-dimensional thin-layer g-C3N4 precursor in a nitric acid solution, stirring the solution at a constant temperature condition, washing obtained solids to be neutral,vacuum drying, performing secondary calcining, cooling to the room temperature, grinding, and obtaining a two-dimensional thin-layer g-C3N4 nanosheet; and 3, adding the two-dimensional thin-layer g-C3N4 nanosheet in deionized water, ultrasonically dispersing the two-dimensional thin-layer g-C3N4 nanosheet, adding the nanosheet into an HAuCl4 aqueous solution under a constant-temperature condition, stirring, adding newly-prepared KBH4 solution, continuously stirring and reacting, and obtaining the two-dimensional thin-layer Au / g-C3N4 composite photocatalyst. The two-dimensional thin-layer g-C3N4 nanosheet is prepared by virtue of a simple and convenient means of calcining, acid treatment and the secondary calcining, and the two-dimensional thin-layer Au / g-C3N4 composite photocatalyst whichis high in performance and environment-friendly is further prepared.

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 Au / g-C 3 N 4 Preparation method and application of composite photocatalyst. Background technique [0002] Environmental pollution and energy crisis are two major challenges facing mankind in this century. Whoever can take the lead in solving these problems will be able to grasp the main rhythm of human development and economic lifeline today. The discharge of industrial wastewater, the surge in global population, the wanton logging and utilization of fossil energy, and a large number of vehicle exhaust emissions are the direct causes of a series of environmental problems such as water pollution, greenhouse effect, and sea level rise. The culprit is the organic molecules and CO produced in the above process 2 molecular. As we all know, water is the source of life for all living things on earth, and water q...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/16C02F1/30B01D53/86B01D53/62C02F101/30
CPCB01D53/8671B01D2257/504B01J27/24B01J35/0013B01J35/004B01J37/16C02F1/30C02F2101/308C02F2305/10
Inventor 李鑫刘重阳吴东遥周亚举李金择马长畅霍鹏伟闫永胜
Owner JIANGSU UNIV
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