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Monatomic silver-carbon point and carbon nitride composite catalyst, preparation method and application thereof

A composite catalyst and carbon nitride technology, which is applied in chemical instruments and methods, light water/sewage treatment, water pollutants, etc., can solve the problems of large silver ion particles and limit the catalytic performance of composite catalysts, and achieve good material stability , high application prospects and use value, good repeatability and controllability

Inactive Publication Date: 2017-12-29
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the composite materials prepared by these methods, the silver ion particles are relatively large, which severely limits the catalytic performance of the composite catalysts.

Method used

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  • Monatomic silver-carbon point and carbon nitride composite catalyst, preparation method and application thereof
  • Monatomic silver-carbon point and carbon nitride composite catalyst, preparation method and application thereof
  • Monatomic silver-carbon point and carbon nitride composite catalyst, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] The preparation of a kind of monoatomic silver-carbon dot and carbon nitride composite catalyst comprises the following steps:

[0039] 1. Weigh 6.005g of sodium tricyanomethane and dissolve in 12ml of water to obtain solution A. Weigh 9.106g silver nitrate and dissolve in 18ml water to obtain solution B. Heat the two solutions of A and B to 80°C respectively. With vigorous stirring, solution B was added dropwise to solution A, and kept stirring at room temperature for 8 h. Suction filter the flocs, wash them four times with ultrapure water, dry them in vacuum at 60°C and grind them to obtain a white powder, which is silver tricyanomethane.

[0040] 2. Weigh 1 g of citric acid in a polytetrafluoroethylene high-temperature hydrothermal reactor, add 0.3 ml of ethylenediamine and 10 ml of ultrapure water into it, transfer the reactor to an oven and react at 200°C for 5 hours. After it was cooled to room temperature, a brownish-yellow aqueous solution was obtained. The s...

Embodiment 2

[0056] The preparation of a kind of monoatomic silver-carbon dot and carbon nitride composite catalyst comprises the following steps:

[0057] 1. Weigh 6.005g of sodium tricyanomethane and dissolve in 12ml of water to obtain solution A. Weigh 9.106g silver nitrate and dissolve in 18ml water to obtain solution B. Heat the two solutions of A and B to 60°C respectively. With vigorous stirring, solution B was added dropwise to solution A, and kept stirring at room temperature for 8 h. Suction filter the flocs, wash them with ultrapure water four times, dry them in vacuum at 80°C, and then grind them to obtain white powder, which is silver tricyanomethane.

[0058] 2. Weigh 3g of citric acid in a polytetrafluoroethylene high-temperature hydrothermal reactor, add 0.7g of ethylenediamine and 15ml of ultrapure water into it, transfer the reactor to an oven and react at 150°C for 3h. After it was cooled to room temperature, a brownish-yellow aqueous solution was obtained. The soluti...

Embodiment 3

[0061] The preparation of a kind of monoatomic silver-carbon dot and carbon nitride composite catalyst comprises the following steps:

[0062] 1. Weigh 6.005g of sodium tricyanomethane and dissolve in 12ml of water to obtain solution A. Weigh 9.106g silver nitrate and dissolve in 18ml water to obtain solution B. Heat the two solutions of A and B to 80°C respectively. With vigorous stirring, solution B was added dropwise to solution A, and kept stirring at room temperature for 8 h. Suction filter the flocs, wash them with ultrapure water for 5 times, dry them in vacuum at 60°C, and then grind them to obtain a white powder, which is silver tricyanomethane.

[0063] 2. Weigh 1 g of citric acid in a polytetrafluoroethylene high-temperature hydrothermal reaction vessel, add 0.3 ml of ethylenediamine into it, transfer the reaction vessel to an oven and react at 220° C. for 3 hours. After it was cooled to room temperature, a brownish-yellow aqueous solution was obtained. The solut...

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Abstract

The invention discloses a monatomic silver-carbon point and carbon nitride composite catalyst, a preparation method and an application thereof. The method comprises the following steps: respectively heating sodium tricyanohydrate aqueous solution and silver nitrate aqueous solution to 60-80 DEG C; dropwise adding the silver nitrate aqueous solution into the sodium tricyanohydrate aqueous solution under a stirring condition; stirring and staying overnight under room temperature; performing suction filtration and washing on the acquired flocculate and performing vacuum drying, thereby acquiring tricyanohydrate silver powder; adding glucose into quadrol and ultrapure water, reacting at 150-220 DEG C, cooling to room temperature, centrifuging, drying and grinding, thereby acquiring CDots powder; adding dicyandiamide, ammonium chloride, tricyanohydrate silver and CDots into ultrapure water, drying and calcining at 400-600 DEG C, cooling to room temperature and then grinding and sieving, thereby acquiring an SDAg-CDots / CN compound photocatalyst. The photocatalyst is capable of degrading a non-steroid anti-inflammatory agent under visible light.

Description

technical field [0001] The invention belongs to the field of photocatalysts, and more specifically relates to a single-atom silver-carbon dot and carbon nitride composite catalyst and its preparation method and application. Background technique [0002] With the development of the economy and the continuous improvement of the quality of life, the output and dosage of non-steroidal anti-inflammatory drugs are increasing day by day, the types are becoming more and more diverse, and the structure is becoming more and more complex. my country has a large population, and the total production and use of non-steroidal anti-inflammatory drugs has always been in the leading position in the world. Due to the frequent use of drugs, non-steroidal anti-inflammatory drugs continue to enter the environment, forming a pseudo-persistent phenomenon. Many drugs are bioaccumulative and chronically toxic, and for aquatic organisms continuously exposed to NSAIDs, it is easy to cause chronic accu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/34C02F101/36C02F101/38
CPCC02F1/30B01J23/50B01J27/24C02F2305/10C02F2101/38C02F2101/34C02F2101/36C02F2103/343B01J35/19B01J35/39Y02W10/37
Inventor 刘国光王枫亮冯义平王盈霏吕文英
Owner GUANGDONG UNIV OF TECH
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