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Carbon nitride nanosheet-gold nanoparticle composite material as well as preparation method and application thereof

A gold nanoparticle and composite material technology, which is applied in the field of carbon nitride nanosheet-gold nanoparticle composite material and its preparation, can solve the problems of inability to carry out large-scale industrial application, difficult separation of products, high energy consumption, etc., and meet the reaction conditions Ease of control, easy separation of products, and high catalytic activity

Pending Publication Date: 2022-03-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of xylonic acid is an important part of the biomass refining industry. At present, its synthesis methods mainly include biological methods and chemical methods. However, these two methods still have low reaction rates, high energy consumption, and product Difficult to separate and other issues, unable to carry out large-scale industrial application

Method used

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  • Carbon nitride nanosheet-gold nanoparticle composite material as well as preparation method and application thereof
  • Carbon nitride nanosheet-gold nanoparticle composite material as well as preparation method and application thereof
  • Carbon nitride nanosheet-gold nanoparticle composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A carbon nitride nanosheet-gold nanoparticle composite material, the preparation method of which comprises the following steps:

[0041] 1) Add 15g of ammonium chloride and 3g of dicyandiamide into 100mL of ultrapure water, stir in a sand bath at 80°C for 4h, then place in an oven, dry at 100°C for 48h, grind and place in a horse In a Furnace, heat at 550°C for 4h to obtain a calcined product (yellow solid);

[0042] 2) Grind 0.13 g of the calcined product and disperse it in ultrapure water, prepare it into a dispersion with a concentration of 1 mg / mL, ultrasonically crush it for 1 h, then add 1.47 mL of a chloroauric acid solution with a concentration of 25 mmol / L while stirring. Under the irradiation of full-band xenon lamp, reacted for 4h, filtered, and the filtered solid was washed and dried to obtain carbon nitride nanosheet-gold nanoparticle composite material (Au / g-C 3 N 4 ).

[0043] Performance Testing:

[0044] Au / g-C of this embodiment 3 N 4 The scannin...

Embodiment 2

[0048] A carbon nitride nanosheet-gold nanoparticle composite material, the preparation method of which comprises the following steps:

[0049] 1) Add 15g of ammonium chloride and 3g of dicyandiamide into 100mL of ultrapure water, stir in a sand bath at 80°C for 4h, then place in an oven, dry at 100°C for 48h, grind and place in a horse In a Furnace, heat at 550°C for 4h to obtain a calcined product (yellow solid);

[0050] 2) Grind 0.11 g of the calcined product and disperse it in ultrapure water, prepare a dispersion with a concentration of 1 mg / mL, ultrasonically crush it for 1 h, then add 0.5 mL of a chloroauric acid solution with a concentration of 25 mmol / L while stirring. React for 4 hours under the irradiation of a full-band xenon lamp, filter, and wash the filtered solid with water and dry to obtain a carbon nitride nanosheet-gold nanoparticle composite material.

[0051] Performance Testing:

[0052] After testing, the morphological features of the carbon nitride n...

Embodiment 3

[0054]A carbon nitride nanosheet-gold nanoparticle composite material, the preparation method of which comprises the following steps:

[0055] 1) Add 15g of ammonium chloride and 3g of dicyandiamide into 100mL of ultrapure water, stir in a sand bath at 80°C for 4h, then place in an oven, dry at 100°C for 48h, grind and place in a horse In a Furnace, heat at 550°C for 4h to obtain a calcined product (yellow solid);

[0056] 2) Grind 0.13 g of the calcined product and disperse it in ultrapure water, prepare a dispersion with a concentration of 1 mg / mL, ultrasonically crush it for 1 h, then add 2.94 mL of a chloroauric acid solution with a concentration of 25 mmol / L while stirring. React for 4 hours under the irradiation of a full-band xenon lamp, filter, and wash the filtered solid with water and dry to obtain a carbon nitride nanosheet-gold nanoparticle composite material.

[0057] Performance Testing:

[0058] After testing, the morphological features of the carbon nitride n...

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Abstract

The invention discloses a carbon nitride nanosheet-gold nanoparticle composite material as well as a preparation method and application thereof. The carbon nitride nanosheet-gold nanoparticle composite material comprises a carrier carbon nitride nanosheet and loaded gold nanoparticles, and the preparation method of the carbon nitride nanosheet-gold nanoparticle composite material comprises the following steps: 1) dispersing ammonium chloride and dicyandiamide in water, and then drying and calcining to obtain a calcined product; and 2) dispersing the calcined product in water, carrying out ultrasonication, adding chloroauric acid, and carrying out a reaction under illumination to obtain the carbon nitride nanosheet-gold nanoparticle composite material. The carbon nitride nanosheet-gold nanoparticle composite material is composed of ultrathin carbon nitride nanosheets and supported gold nanoparticles, the preparation method is simple and efficient, and the carbon nitride nanosheet-gold nanoparticle composite material has the advantages of being high in catalytic activity, good in thermal stability, capable of being recycled and the like when being used as a photocatalyst for synthesizing xylonic acid through catalytic oxidation of xylose. The method is suitable for large-scale production of xylonic acid.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a carbon nitride nanosheet-gold nanoparticle composite material and its preparation method and application. Background technique [0002] With the development of society and the advancement of science and technology, the energy issue has attracted more and more attention from all countries in the world. How to develop green and renewable resources and energy is an urgent problem for human beings to solve. Biomass refers to various organisms (including all animals, plants and microorganisms) formed through photosynthesis. It has the advantages of being environmentally friendly, abundant in reserves, cheap and easy to obtain, and rich in functional groups. important path to sustainable development. However, the current biomass refining industry has bottlenecks such as low product value and high production costs, and its development has been greatly restricted. [0003] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C07C51/16C07C59/105C01B21/082
CPCB01J27/24C07C51/16C01B21/0605C01P2004/03C01P2004/04C01P2004/61B01J35/39C07C59/105
Inventor 彭新文钟林新杨韵怡陈亮邹刃
Owner SOUTH CHINA UNIV OF TECH
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