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Graphene-like carbon nitride-based composite photocatalyst and preparation method thereof

A carbon nitride-based and carbon nitride-based technology, which is applied in the field of graphene-like carbon nitride-based composite photocatalysts and its preparation, can solve the problems that the recycling performance needs to be further enhanced, and achieve high visible light catalytic activity and recycling The effect of performance and good application prospects

Active Publication Date: 2018-06-08
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its disadvantage is that the catalyst is composed of nano-sized sulfide particles, and the recycling performance of these catalyst particles needs to be further enhanced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] At 25°C, weigh 5g of melamine, put it in a muffle furnace, roast at 480°C for 2h, and cool to 25°C to prepare graphene-like carbon nitride;

[0022] At 25°C, add 1.0 g of the graphene-like carbon nitride prepared in the above steps into 20 mL of deionized water, ultrasonically disperse for 1 h, add 0.03 g of ammonium tetrathiomolybdate and 0.02 g of copper oxide, and stir for 0.5 h. Transfer to a reaction kettle, react at 150°C for 36h, cool to 25°C, centrifuge, wash the precipitate with 50mL ethanol and 100mL deionized water, and dry at 60°C for 12h to obtain a graphene-like carbon nitride-based composite light catalyst.

[0023] In the supported catalyst, the support graphene carbon nitride has a sheet-like structure, and the supported material Cu 2 MoS 4 It is a spherical particle with an average particle size of 20nm. The catalyst is applied to the hydrogen production reaction of photolysis of water under visible light. The average hydrogen production rate of the ...

Embodiment 2

[0025] At 25°C, weigh 5g of urea, put it into a muffle furnace, roast at 500°C for 2.5h, and cool to 25°C to prepare graphene-like carbon nitride;

[0026] At 25°C, add 1.5 g of the graphene-like carbon nitride prepared in the above steps into 30 mL of deionized water, ultrasonically disperse for 1.5 h, add 0.045 g of ammonium tetrathiomolybdate and 0.06 g of copper sulfate, and stir for 1 h. Transfer to a reaction kettle, react at 180°C for 30h, cool to 25°C, centrifuge, wash the precipitate with 100mL ethanol and 200mL deionized water, and dry at 60°C for 12h to obtain a graphene-like carbon nitride-based composite light catalyst.

[0027] In the supported catalyst, the support graphene carbon nitride has a sheet-like structure, and the supported material Cu 2 MoS 4 It is a spherical particle with an average particle size of 15nm. The catalyst is applied to the hydrogen production reaction of photolysis of water under visible light. The average hydrogen production rate of ...

Embodiment 3

[0029] At 25°C, weigh 10g of melamine, put it into a muffle furnace, roast at 550°C for 3h, and cool to 25°C to obtain graphene-like carbon nitride;

[0030] At 25°C, add 2.0 g of the graphene-like carbon nitride prepared in the above steps into 40 mL of deionized water, ultrasonically disperse for 1 h, add 0.06 g of ammonium tetrathiomolybdate and 0.04 g of copper oxide, stir for 2 h, transfer Put it in the reaction kettle, react at 200°C for 25h, cool to 25°C, centrifuge, wash the precipitate with 120mL ethanol and 240mL deionized water, and dry at 60°C for 12h to prepare a graphene-like carbon nitride composite photocatalyst.

[0031] In the supported catalyst, the support graphene carbon nitride has a sheet-like structure, and the supported material Cu 2 MoS 4 It is a spherical particle with an average particle size of 12nm. The catalyst is applied to the hydrogen production reaction of photolysis of water under visible light. The average hydrogen production rate of the c...

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PUM

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Abstract

The invention discloses a graphene-like carbon nitride-based composite photocatalyst. The catalyst is a loaded catalyst, wherein the carrier of the catalyst is graphene-like carbon nitride; an activeload is ternary transition metal sulfide. The catalyst is prepared by performing a hydrothermal reaction on the graphene carbon nitride, ammonium tetrathiomolybdate and a copper-containing precursor.The catalyst has the advantages of higher visible light catalyzing performance, superior recycling performance, and a good application prospect in the fields of preparation of hydrogen by photocatalytic water splitting, synthesis of organic matters with photocatalysis, waste water treatment with photocatalysis and the like.

Description

technical field [0001] The invention relates to a graphene-like carbon nitride-based composite photocatalyst and a preparation method thereof, belonging to the preparation technology of inorganic nanocomposite materials. Background technique [0002] Since Fujishima and Honda Motor Company utilize TiO 2 Photoelectrodes split water to produce hydrogen or oxygen, and semiconductor-based photocatalysts have attracted more and more attention in solving global energy shortages and environmental problems. At present, a large number of photocatalysts have been successfully developed. However, most of these photocatalysts need to add noble metals to expand their visible light catalytic performance. [0003] Chinese patent CN201310455691.X discloses a C 3 N 4 / Ag 3 PO 4 Preparation and application methods of visible light photocatalytic materials. The patent prepares C by ultrasonic-assisted method 3 N 4 / Ag 3 PO 4 Visible light photocatalytic material, the catalyst has hi...

Claims

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Application Information

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IPC IPC(8): B01J27/24C01B3/04
CPCC01B3/042B01J27/24C01B2203/1082C01B2203/1076C01B2203/0277B01J35/39Y02E60/36
Inventor 张泽武彭昊吴晓晗马雨航史皓峻
Owner NANJING INST OF TECH
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