Molybdenum disulfide quantum dot modified graphite-like carbon nitrene as well as preparation method and application thereof

A technology of molybdenum disulfide and quantum dots, applied in the field of nanomaterials, can solve the problems of unreported photocatalytic performance

Inactive Publication Date: 2017-12-29
ZHENJIANG COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Quantum dot material enhanced g-C 3 N 4 The content

Method used

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  • Molybdenum disulfide quantum dot modified graphite-like carbon nitrene as well as preparation method and application thereof
  • Molybdenum disulfide quantum dot modified graphite-like carbon nitrene as well as preparation method and application thereof
  • Molybdenum disulfide quantum dot modified graphite-like carbon nitrene as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of molybdenum disulfide quantum dot modified graphitic carbon nitrogen, comprises the steps:

[0025] (1) Add 0.22g (NH4) 2 MoO 4 and 0.4g CH 4 N 2 Dissolve S in 40 mL of deionized water, and add 1.5 mL of N 2 h 4 , after completely dissolving, continue to stir for 30 min, then transfer the mixture to a 50 mL stainless steel reaction kettle, place it in a vacuum oven at 260°C for 9 h, and cool to room temperature. After centrifugation, the reaction product was washed repeatedly with deionized water and absolute ethanol, and finally dried at 80°C for 10 h under vacuum to obtain a gray-black product powder, namely molybdenum disulfide quantum dots (MoS 2 QDs).

[0026] (2) Weigh again 0.1g g-C 3 N 4 Dissolve in 20mL microemulsion (volume ratio 1:1:1) mixed with polyethylene glycol octylphenyl ether, hexanol, and n-heptane, ultrasonically disperse for 10h, then add MoS 2 After the QDs (1%-10%) were ultrasonicated for 24 h, they were washed r...

Embodiment 2

[0028] The preparation method of molybdenum disulfide quantum dot modified graphitic carbon nitrogen, comprises the steps:

[0029] (1) Add 0.2g Na 2 MoO 4 and 0.45g Na 2 Dissolve S in 40 mL of deionized water, and add 2 mL of N 2 h 4 , after completely dissolving, continue to stir for 30min, then transfer the mixture to a 50mL stainless steel reaction kettle, place it in a vacuum drying oven at 280°C for 14h, and cool to room temperature. After the reaction product was separated by centrifugation, it was washed repeatedly with deionized water and absolute ethanol, and finally dried at 80° C. for 10 h under vacuum to obtain a gray-black product powder, namely molybdenum disulfide quantum dots.

[0030] (2) Weigh again 0.1g g-C 3 N 4Dissolve in 20mL microemulsion mixed with polyethylene glycol octylphenyl ether, hexanediol and n-heptane, the volume ratio is 1:1:2, after ultrasonic dispersion for 10h, add MoS 2 After the QDs were 7% and continued to be sonicated for 24h, ...

Embodiment 3

[0032] The preparation method of molybdenum disulfide quantum dot modified graphitic carbon nitrogen, comprises the steps:

[0033] (1) Add 0.3g MoCl 5 and 0.5g K 2 Dissolve S in 40 mL of deionized water, and add 3 mL of N 2 h 4 , after completely dissolving, continue to stir for 30min, then transfer the mixture to a 50mL stainless steel reaction kettle, place it in a vacuum drying oven at 320°C for 18h, and cool to room temperature. After the reaction product was separated by centrifugation, it was washed repeatedly with deionized water and absolute ethanol, and finally dried at 80° C. for 10 h under vacuum to obtain a gray-black product powder, namely molybdenum disulfide quantum dots.

[0034] Then weigh 0.1g g-C 3 N 4 Dissolve in 20mL microemulsion mixed with polyethylene glycol octylphenyl ether, hexanol and n-heptane, the volume ratio is 1:2:1, after ultrasonic dispersion for 10h, add MoS 2 After the QDs were 7% and continued to be sonicated for 24h, they were wash...

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Abstract

The invention relates to molybdenum disulfide quantum dot modified graphite-like carbon nitrene as well as a preparation method and an application thereof. Carbon nitrene adopting a two-dimensional layered structure is modified with nanoscale molybdenum disulfide quantum dots, the content of molybdenum disulfide quantum dots is 1wt%-10wt%, and the balance is carbon nitrene. The preparation method comprises steps as follows: (1) soluble molybdenum salt, sulfur and hydrazine are subjected to a hydrothermal reaction, and the molybdenum disulfide quantum dots are produced; (2) g-C3N4 synthesized through solid phase sintering and the molybdenum disulfide quantum dots are dispersed in a microemulsion, and a MoS2QDs/g-C3N4 composite is synthesized with a microemulsion-ultrasonic method and has higher photocatalysis efficiency. The cost is low and the process is simple.

Description

technical field [0001] The invention relates to the field of nanomaterials, in particular to the composition, preparation and application of a molybdenum disulfide quantum dot modified graphitic carbonacene visible light photocatalyst. Background technique [0002] Two-dimensional layered materials represented by graphene have received extensive research and attention due to their unique structure and excellent performance, and have broad application prospects in the fields of environment and energy. g-C with graphene-like structure 3 N 4 Because of its special semiconductor characteristics (band gap Eg=2.7eV), absorption in the visible light region, and good chemical stability, it has attracted widespread attention. As a new type of non-metallic photocatalytic material, it is widely used in organic reactions , degradation of organic dyes, photolysis of water and hydrogen production and other catalytic reactions. [0003] However, g-C 3 N 4 In practical application, it ...

Claims

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Application Information

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IPC IPC(8): B01J27/24
CPCB01J37/343B01J27/24B01J35/004B01J37/10
Inventor 唐国钢
Owner ZHENJIANG COLLEGE
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