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Preparation method of 2D/2D g-C3N4/ZnIn2S4 heterojunction composite photocatalyst

A 2dg-c3n4, g-c3n4 technology, applied in the field of material preparation, can solve the problem of low photocatalytic quantum efficiency, and achieve the effect of simple and easy operation and low cost

Pending Publication Date: 2020-01-10
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ZnIn 2 S 4 Photogenerated electrons and photogenerated holes generated by absorbing visible light are easy to recombine, resulting in low photocatalytic quantum efficiency
Therefore, pure ZnIn 2 S 4 As a photocatalyst for splitting water to produce hydrogen, there are still certain limitations.

Method used

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  • Preparation method of 2D/2D g-C3N4/ZnIn2S4 heterojunction composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1: g-C 3 N 4 Preparation of Ultrathin Nanosheets

[0027] (1.1) Add 2g of melamine into a 100ml crucible, then add 10g of ammonium chloride into the crucible, then add 10ml of water, stir evenly with a glass rod, and put it in an oven at 60°C for drying.

[0028] (1.2) Put the lidded crucible in step (1.1) into a box-type muffle furnace, heat it to 550°C at a heating rate of 4°C / min, and after cooling, mill it with water in a ball mill for 30min, then wash and dry Dry.

[0029] (1.3) Put the sample prepared in step (1.2) into a tube furnace at 620°C and continue heating for 2 hours, the heating rate is 5°C / min, the atmosphere is high-purity argon, and the gas flow rate is 0.1L / min. min; after the sample is cooled, it is the obtained g-C 3 N 4 ultrathin nanosheets.

[0030] Step 2: Prepare g-C 3 N 4 / ZnIn 2 S 4 ultrathin nanosheets

[0031] (2.1) Put 30ml deionized water, 0.3g Zn(NO 3 ) 2 ·6H 2 O, 0.76g In(NO 3 ) 3 4.5H 2 The g-C prepared in the ste...

Embodiment 2

[0034] Step 1: g-C 3 N 4 Preparation of Ultrathin Nanosheets

[0035] (1.1) Add 5g of melamine into a 100ml crucible, then add 10g of ammonium chloride into the crucible, then add 5ml of water, stir evenly with a glass rod, and put it in an oven at 60°C for drying.

[0036] (1.2) Put the crucible with a cover in step (1.1) into a box-type muffle furnace, heat it to 550°C at a heating rate of 5°C / min, and after cooling, mill it with water in a ball mill for 60min, then wash and dry Dry.

[0037] (1.3) Put the sample prepared in step (1.2) into a tube furnace at 650°C and continue heating for 4 hours, the heating rate is 10°C / min, the atmosphere is high-purity argon, and the gas flow rate is 0.1L / min. min; after the sample is cooled, it is the obtained g-C 3 N 4 ultrathin nanosheets.

[0038] Step 2: Prepare g-C 3 N 4 / ZnIn 2 S 4 ultrathin nanosheets

[0039] (2.1) Put 30ml deionized water and 0.3g Zn(NO3) into a 50ml beaker respectively 2 ·6H 2 O, 0.76g In(NO 3 ) ...

Embodiment 3

[0042] Step 1: g-C 3 N 4 Preparation of Ultrathin Nanosheets

[0043] (1.1) Add 2g of melamine into a 100ml crucible, then add 20g of ammonium chloride into the crucible, then add 5ml of water, stir evenly with a glass rod, and put it in an oven at 60°C for drying.

[0044] (1.2) Put the crucible with a cover in step (1.1) into a box-type muffle furnace, heat it to 550°C at a heating rate of 4°C / min, and after cooling, mill it with water in a ball mill for 60min, then wash and dry Dry.

[0045] (1.3) Put the sample prepared in step (1.2) into a tube furnace at 620°C and continue heating for 4 hours, the heating rate is 5°C / min, the atmosphere is high-purity argon, and the gas flow rate is 0.1L / min. min; after the sample is cooled, it is the obtained g-C 3 N 4 ultrathin nanosheets.

[0046] Step 2: Prepare g-C 3 N 4 / ZnIn 2 S 4 ultrathin nanosheets

[0047] (2.1) Put 30ml deionized water and 0.3g Zn(NO3) into a 50ml beaker respectively 2 ·6H 2 O, 0.76g In(NO 3 ) ...

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Abstract

The invention discloses a preparation method of a 2D / 2D g-C3N4 / ZnIn2S4 heterojunction composite photocatalyst. The preparation method includes: firstly modifying a ZnIn2S4 photocatalyst with sodium citrate to find an optimal dosage; then further optimizing the g-C3N4 photocatalyst; and performing in-situ growth of a layer of ZnIn2S4 nanosheet on the surface of a g-C3N4 nanosheet, thus obtaining the 2D / 2D g-C3N4 / ZnIn2S4 heterojunction composite photocatalyst. The preparation method provided by the invention is simple, the raw materials are easily available, and reaction conditions are moderate.The prepared g-C3N4 / ZnIn2S4 two-dimensional composite photocatalytic material has efficient photocatalytic hydrogen production activity, and the hydrogen production rate reaches 3.4mmol / h / g, which isincreased by 180% compared with the hydrogen production rate of single g-C3N4.

Description

technical field [0001] The invention belongs to the technical field of material preparation, in particular to a 2D / 2D g-C 3 N 4 / ZnIn 2 S 4 Preparation method of heterojunction composite photocatalyst. Background technique [0002] Energy and the environment have always been high-profile global issues. Traditional fossil fuels such as coal and oil are the main energy consumed in the world at present. But on the one hand, due to climate change, natural disasters and some social reasons, the growth of energy production is slow; on the other hand, the rapid growth of population and the continuous development of the world economy, especially the rapid growth of emerging economies, lead to a sharp increase in energy consumption. The rate of oil consumption is 100,000 times faster than the rate of natural oil production, and the existing fossil energy storage can no longer keep up with the pace of world economic development. The more serious problem is that the air pollution...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/08B01J35/10B01J37/34C01B3/04B82Y30/00B82Y40/00
CPCB01J27/24B01J37/082B01J37/343C01B3/042B82Y30/00B82Y40/00C01B2203/1076C01B2203/1082C01B2203/0277B01J35/61B01J35/39Y02E60/36
Inventor 韩长存方国针童正夫刘志锋苏鹏飞周倩吴凌颖
Owner HUBEI UNIV OF TECH
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