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Preparation and application of graphite phase carbon nitride nanosheet loaded silver monatomic photocatalyst

A graphite-phase carbon nitride and photocatalyst technology, which is applied in the field of photocatalytic materials, can solve problems such as photogenerated carrier recombination, and achieve cost-saving effects

Pending Publication Date: 2022-07-01
EAST CHINA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional g-C 3 N 4 ) photogenerated carrier recombination is serious, and there have been many related research reports on improving the separation efficiency of photogenerated carriers

Method used

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  • Preparation and application of graphite phase carbon nitride nanosheet loaded silver monatomic photocatalyst
  • Preparation and application of graphite phase carbon nitride nanosheet loaded silver monatomic photocatalyst
  • Preparation and application of graphite phase carbon nitride nanosheet loaded silver monatomic photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] a. Put 15g of urea into an alumina crucible, heat up to 550°C with a heating rate of 2°C / min in a muffle furnace, and then cool to room temperature, then heat up to 550°C with a heating rate of 5°C / min Carry out calcination, and finally, after it is lowered to room temperature, the temperature is raised to 550° C. at a heating rate of 2° C. / min for calcination to obtain a pale yellow solid powder material, which is ground evenly and used for later use.

[0043] b. Take 0.1 g of the light yellow solid powder material obtained in step a and place it in 30 mL of deionized water, and stir fully to obtain a uniformly dispersed g-C 3 N 4 / water mixed solution;

[0044] c. Add 0.10 mL of AgNO with a concentration of 1 mg / mL dropwise 3 solution, so that the Ag loading is controlled at 0.48% (mass fraction);

[0045] d, adding AgNO in step c 3 g-C 3 N 4 / Water mixed solution is ultrasonically treated, and a uniform pale yellow suspension is obtained after ultrasonication f...

Embodiment 2

[0050] a. Put 15g of urea into an alumina crucible, heat up to 550°C with a heating rate of 2°C / min in a muffle furnace, and then cool to room temperature, then heat up to 550°C with a heating rate of 5°C / min Carry out calcination, and finally, after it is lowered to room temperature, the temperature is raised to 550° C. at a heating rate of 2° C. / min for calcination to obtain a pale yellow solid powder material, which is ground evenly and used for later use.

[0051] b. Take 0.1 g of the light yellow solid powder material obtained in step a and place it in 30 mL of deionized water, and stir fully to obtain a uniformly dispersed g-C 3 N 4 / water mixed solution;

[0052] c. Add 0.25mL of AgNO with a concentration of 1mg / mL dropwise 3 solution, so that the Ag loading is controlled at 0.87% (mass fraction);

[0053] d, adding AgNO in step c 3 g-C 3 N 4 / Water mixed solution is ultrasonically treated, and a uniform pale yellow suspension is obtained after ultrasonication for...

Embodiment 3

[0058] a. Put 15g of urea into an alumina crucible, heat up to 550°C with a heating rate of 2°C / min in a muffle furnace, and then cool to room temperature, then heat up to 550°C with a heating rate of 5°C / min Carry out calcination, and finally, after it is lowered to room temperature, the temperature is raised to 550° C. at a heating rate of 2° C. / min for calcination to obtain a pale yellow solid powder material, which is ground evenly and used for later use.

[0059] b. Take 0.1 g of the light yellow solid powder material obtained in step a and place it in 30 mL of deionized water, and stir fully to obtain a uniformly dispersed g-C 3 N 4 / water mixed solution;

[0060] c. Add 0.40 mL of AgNO with a concentration of 1 mg / mL dropwise 3 solution, so that the Ag loading is controlled at 1.43% (mass fraction);

[0061] d, adding AgNO in step c 3 g-C 3 N 4 / Water mixed solution is ultrasonically treated, and a uniform pale yellow suspension is obtained after ultrasonication f...

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Abstract

The invention relates to preparation and application of a graphite phase carbon nitride nanosheet loaded silver monatomic photocatalyst, provides a preparation method and application of a monatomic photocatalyst Ag / g-C3N4, and belongs to the technical field of photocatalytic material preparation. The preparation method comprises the following steps: firstly, obtaining a bulk-phase g-C3N4 nanosheet by virtue of a multi-time calcination method; secondly, adsorbing Ag < + > on the g-C3N4 nanosheet through impregnation adsorption, so as to prepare a precursor Ag < + > (at) g-C3N4; finally, Ag atoms are anchored on the precursor in situ through a photodeposition method, the Ag / g-C3N4 photocatalyst is successfully prepared, and the Ag / g-C3N4 photocatalyst can be applied to the field of hydrogen production through photocatalytic decomposition of water. The efficient monatomic Ag / g-C3N4 photocatalyst is prepared through the simple preparation method and operation process, and the photocatalyst has efficient photocatalytic hydrogen production activity and is an effective photocatalyst for decomposing water to produce hydrogen.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials. The invention relates to a silver single-atom photocatalyst supported on graphitic carbon nitride nanosheets and a preparation method thereof. Background technique [0002] At present, the structure of energy and resources is mainly concentrated in non-renewable energy sources such as coal, oil and natural gas. Therefore, it is urgent to solve the problems of energy and environmental crisis. Photocatalytic hydrogen production technology directly uses solar energy to split water to generate hydrogen, and solar energy is one of the most abundant resources in nature. It has the characteristics of low operating cost and no pollution, which provides the possibility for hydrogen energy to replace fossil fuels. In recent years, graphitic carbon nitride (g-C 3 N 4 ) has attracted extensive attention as an inexpensive, metal-free, visible-light-responsive 2D conjugated polymer photocatalytic mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J23/50B01J37/34C01B3/04
CPCB01J27/24B01J23/50B01J37/344C01B3/042B01J35/394B01J35/39
Inventor 贾艳艳苏海伟唐华
Owner EAST CHINA UNIV OF SCI & TECH
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