G-C3N4/MoS2 composite photocatalyst and one-pot preparation method thereof

A technology of g-c3n4 and composite light, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, hydrogen/synthesis gas production, etc., can solve the problems of cumbersome process, long preparation cycle, and inability to form heterojunction interface, etc. Achieve the effect of large specific surface area and excellent hydrogen production performance

Inactive Publication Date: 2019-04-30
CHANGSHA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is not only complicated in process and long in preparation cycle, but also g-C 3 N 4 and MoS 2 A very strong heterojunction interface cannot be formed between the two

Method used

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  • G-C3N4/MoS2 composite photocatalyst and one-pot preparation method thereof
  • G-C3N4/MoS2 composite photocatalyst and one-pot preparation method thereof
  • G-C3N4/MoS2 composite photocatalyst and one-pot preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] g-C of this example 3 N 4 / MoS 2 The composite photocatalyst was prepared by the following steps:

[0030] (1) Weigh 2.5g of thiourea and 0.0030g of sodium molybdate, put them in an agate mortar, grind them thoroughly for 30 minutes, then weigh 2.5g of urea and continue grinding for 30 minutes, and then place them in a vacuum oven at 60°C for 6 hours to obtain dry mixture;

[0031] (2) Place the dry mixture obtained in step (1) in a semi-closed porcelain boat, and calcinate at 550°C under the protection of nitrogen atmosphere (nitrogen flow rate 10mL / min, heating rate 5°C / min), to obtain g-C 3 N 4 / MoS 2 composite photocatalyst.

[0032] from figure 1 It can be known that g-C obtained in this embodiment 3 N 4 / MoS 2The morphology of the composite photocatalyst is a porous ultrathin flake interspersed structure, indicating that g-C 3 N 4 with MoS 2 Combine firmly.

[0033] from figure 2 It can be seen that there is g-C 3 N 4 and MoS 2 The characteristi...

Embodiment 2

[0041] g-C of this example 3 N 4 / MoS 2 The composite photocatalyst was prepared by the following steps:

[0042] (1) Weigh 3 g of thiourea and 0.0050 g of ammonium molybdate, put them in an agate mortar, grind them thoroughly for 20 minutes, then weigh 2 g of urea and continue grinding for 20 minutes, and then place them in a vacuum oven at 80° C. for 10 hours to obtain a dry mixture;

[0043] (2) Place the dry mixture obtained in step (1) in a semi-closed porcelain boat, and calcinate at 500°C under the protection of nitrogen atmosphere (nitrogen flow rate is 5mL / min, heating rate is 2.5°C / min), to obtain g-C 3 N 4 / MoS 2 Composite photocatalyst materials.

Embodiment 3

[0045] g-C of this example 3 N 4 / MoS 2 The composite photocatalyst was prepared by the following steps:

[0046] (1) Weigh 4 g of thiourea and 0.0030 g of ammonium thiomolybdate, put them in an agate mortar, grind them thoroughly for 40 minutes, then weigh 1 g of urea and continue grinding for 40 minutes, and then place them in a vacuum oven at 80°C for 12 hours to obtain dry mixture;

[0047] (2) Place the dry mixture obtained in step (1) in a semi-closed porcelain boat, and calcinate at 520°C under the protection of nitrogen atmosphere (nitrogen flow rate is 8mL / min, heating rate is 4°C / min), to obtain g-C 3 N 4 / MoS 2 Composite photocatalyst materials.

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Abstract

The invention relates to a g-C3N4 / MoS2 composite photocatalysis material and a one-pot preparation method thereof. The method comprises the following steps: 1) mixing a g-C3N4 precursor with a molybdenum source, carrying out full grinding, and performing vacuum drying to obtain a dry mixture; and 2) calcining the dry mixture obtained in step 1) under the protection of a nitrogen atmosphere to obtain the g-C3N4 / MoS2 composite photocatalyst. GG-C3N4 and MoS2 in the g-C3N4 / MoS2 composite photocatalyst prepared by the method form a very strong heterojunction interface, so the composite photocatalyst has an excellent hydrogen production performance. The invention also discloses the g-C3N4 / MoS2 composite photocatalyst prepared by the method.

Description

technical field [0001] The invention relates to the field of nano photocatalytic materials, in particular to a g-C 3 N 4 / MoS 2 Composite photocatalyst and its one-pot preparation method. Background technique [0002] The conversion of solar energy into chemical energy using photocatalysis is a promising approach to address the global energy and environmental crises. To make this technology sustainable, low-cost and highly efficient metal-free photocatalysts need to be developed. g-C 3 N 4 Due to its suitable bandgap, high temperature and chemical stability, and relatively low toxicity, it has been considered as a promising metal-free photocatalyst for many photocatalytic applications. However, the original g-C 3 N 4 The overall performance of photocatalysts is still limited due to its small specific surface area, poor visible light absorption, and rapid charge recombination. Studies have shown that supporting noble metals as cocatalysts can effectively separate pho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10C01B3/02
CPCB01J27/24B01J35/004B01J35/10B01J35/1004C01B3/02C01B2203/1211
Inventor 沈洁张淑敏张世英陈亮
Owner CHANGSHA UNIVERSITY
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