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A carbon nitride-loaded nano-gold catalyst reduced by polydopamine and its preparation method

A polydopamine, carbon nitride technology, applied in catalyst activation/preparation, physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, etc. , speed up the reaction, the effect of large specific surface area

Active Publication Date: 2020-02-28
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using traditional methods to load nano-gold on carbon nitride also requires the addition of chemical reagents such as sodium borohydride, which does not meet the theme of green chemistry.

Method used

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  • A carbon nitride-loaded nano-gold catalyst reduced by polydopamine and its preparation method
  • A carbon nitride-loaded nano-gold catalyst reduced by polydopamine and its preparation method
  • A carbon nitride-loaded nano-gold catalyst reduced by polydopamine and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A preparation method of a polydopamine-reduced carbon nitride supported nano-gold catalyst, comprising the following steps:

[0052] (1) Weigh 10g of melamine powder and place it in a corundum crucible with a cover, and place it in the center of the muffle furnace; adjust the temperature of the muffle furnace to rise from room temperature to 600°C at a rate of 5°C / min, and keep it for 2 hours Make it cool down to room temperature naturally, and obtain the pure g-C of yellow solid substance 3 N 4 , placed in a mortar and fully ground into powder to obtain 7g of pure g-C 3 N 4 powder.

[0053] (2) Weigh 0.6g of the pure g-C obtained in the above (1) step 3 N 4 Put the powder in a 500mL beaker, add 300mL of Tris-HCl (10mM, pH 8.5) buffer solution, stir well and then sonicate for 30min;

[0054] (3) Weigh 0.6g of dopamine powder and add it to the g-C prepared in the above step (2). 3 N 4 and Tris-HCl buffer solution, stirred under 600r / min magnetic stirring for 24h,...

Embodiment 2

[0061] A preparation method of a polydopamine-reduced carbon nitride supported nano-gold catalyst, comprising the following steps:

[0062] (1) Weigh 10g of melamine powder and place it in a corundum crucible with a cover, and place it in the center of the muffle furnace; adjust the temperature of the muffle furnace to rise from room temperature to 600°C at a rate of 5°C / min, and keep it for 2 hours Make it cool down to room temperature naturally, and obtain the pure g-C of yellow solid substance 3 N 4 , placed in a mortar and fully ground into powder to obtain 7g of pure g-C 3 N 4 powder.

[0063] (2) Weigh 0.6g of the pure g-C obtained in the above (1) step 3 N 4 Put the powder in a 500mL beaker, add 300mL of Tris-HCl (10mM, pH 8.5) buffer solution, stir well and then sonicate for 30min;

[0064] (3) Weigh 0.48g of dopamine powder and add it to the g-C prepared in the above step (2). 3 N 4 and Tris-HCl buffer solution, stirred under 600r / min magnetic stirring for 24h...

Embodiment 3

[0069] A preparation method of a polydopamine-reduced carbon nitride supported nano-gold catalyst, comprising the following steps:

[0070] (1) Weigh 10g of melamine powder and place it in a corundum crucible with a cover, and place it in the center of the muffle furnace; adjust the temperature of the muffle furnace to rise from room temperature to 600°C at a rate of 5°C / min, and keep it for 2 hours Make it cool down to room temperature naturally, and obtain the pure g-C of yellow solid substance 3 N 4 , placed in a mortar and fully ground into powder to obtain 7g of pure g-C 3 N 4 powder.

[0071] (2) Weigh 0.6g of the pure g-C obtained in the above (1) step 3 N 4 Put the powder in a 500mL beaker, add 300mL of Tris-HCl (10mM, pH 8.5) buffer solution, stir well and then sonicate for 30min;

[0072] (3) Weigh 0.6g of dopamine powder and add it to the g-C prepared in the above step (2). 3 N 4 and Tris-HCl buffer solution, stirred under 600r / min magnetic stirring for 24h,...

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Abstract

The invention discloses a polydopamine reduced carbon nitride loaded nanogold catalyst and a preparation method thereof. The catalyst comprises a polydopamine-carbon nitride carrier formed by auto-polymerization of dopamine on the surface of carbon nitride and nanogold particles reduced by polydopamine on the carrier, polydopamine amorphously coats sheet carbon nitride, the nanogold particles areloaded on the surface of the polydopamine-carbon nitride carrier, a mass ratio of nanogold to polydopamine-carbon nitride carrier is 1-4:30, and a mass ratio of polydopamine to carbon nitride is 0.8-1.2:1. The catalyst has the advantages of being efficient, environment-friendly, safe, high in stability and easy to recycle and is an efficient-catalysis environment-friendly gold catalyst which can be widely applied. The preparation method has the advantages of mild reaction condition, simple preparation process and environment friendliness and can be used for large-scale preparation.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and relates to a carbon nitride-supported gold catalyst material and a preparation method thereof, in particular to a carbon nitride-supported nano-gold catalyst reduced by polydopamine and a green preparation method thereof. Background technique [0002] With the rapid development of the global economy, environmental problems have become increasingly prominent, especially persistent organic pollutants (Persistent Organic Pollutants, referred to as POPs) represented by nitroaromatic hydrocarbons, which can persist in the environment and accumulate through the food web and cause harmful effects on human health. Because these substances are highly toxic, persistent, bioaccumulative, and long-distance migration, they seriously threaten human health and have attracted widespread attention. Nano-gold catalysts have been widely used in chemical industry, environment, medicine and other fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06B01J37/16
CPCB01J31/06B01J37/16
Inventor 曾茁桐秦蕾肖嵘曾光明赖萃黄丹莲易欢李必胜张辰许飘程敏何江凡黄芳龙
Owner HUNAN UNIV
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