Preparation method and application of hollow covalent triazinyl framework material loaded with MoS2 quantum dots

A framework material and triazine-based technology, which is applied in the field of preparation of hollow covalent triazine-based framework materials, can solve the problems of tediousness, harsh preparation conditions, and easy aggregation of nanosheets, and achieve economical, environmentally friendly, and simple preparation processes Moreover, the effect of promoting transfer and separation

Active Publication Date: 2020-09-18
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But MoS 2 Nanosheets are easy to agglomerate, and the preparation conditions are harsh and cumbersome, so how to easily prepare MoS 2 solution of quantum dots, and effective loading on covalent triazine-based framework materials is crucial

Method used

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  • Preparation method and application of hollow covalent triazinyl framework material loaded with MoS2 quantum dots
  • Preparation method and application of hollow covalent triazinyl framework material loaded with MoS2 quantum dots
  • Preparation method and application of hollow covalent triazinyl framework material loaded with MoS2 quantum dots

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 The present invention is loaded with MoS 2 Preparation method of quantum dot hollow covalent triazine-based framework material:

[0032] The loading of the present invention has MoS 2 The preparation method of quantum dot hollow covalent triazine-based framework material can be divided into three steps:

[0033] (1) Preparation of silica nanospheres: adding ethanol, tetraethyl orthosilicate, deionized water and 25% to 28% ammonia water to a three-necked flask at a volume ratio of 220:18:30:10.5, Stir vigorously at 40°C for 2 hours, centrifuge the solution, wash the product three times with water and ethanol, and dry it. After grinding, a white powder is obtained, which is an ordered silica template.

[0034] (2)MoS 2 Preparation of quantum dot solution: 120mg of MoS 2 Disperse the powder in 60ml of 1mg / ml tannic acid solution, in a water bath at 25°C, continue to sonicate (300w power) for 4 hours, and then centrifuge at 10,000 rpm for 10 minutes to obta...

Embodiment 2

[0036] Embodiment 2 The present invention is loaded with MoS 2 Structural characterization of quantum dot hollow covalent triazine-based framework materials.

[0037] (1) Morphological characterization

[0038] SEM and TEM images ( Figure 1-2 ) shows a unique multilayered and interconnected porous structure, and the loaded MoS 2 There is no obvious collapse of the channel behind the quantum dots, indicating that the structure of the material is stable and strong. HRTEM image ( image 3 ) clearly shows that MoS 2 The average diameter of quantum dots is about 5nm, and MoS 2 The quantum dots are evenly distributed on the surface of the hollow covalent triazine-based framework material.

[0039] (2) Crystal form characterization

[0040] pass( Figure 4 ) can be seen, in the loaded MoS 2 Before and after the quantum dots, the hollow covalent triazine-based framework materials have two obvious diffraction peaks, which respectively correspond to the (100) crystal plane of ...

Embodiment 3

[0045] Embodiment 3 The present invention is loaded with MoS 2 Quantum dot hollow covalent triazine-based framework material photolyzes water to generate hydrogen under visible light

[0046] loaded with MoS 2 The preparation process of quantum dot hollow covalent triazine-based framework material is the same as Example 1

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Abstract

The invention discloses a preparation method and application of a hollow covalent triazinyl framework material loaded with MoS2 quantum dots. The preparation method comprises the following steps: (1)preparing silicon dioxide nano spheres; (2) preparing a MoS2 quantum dot solution; and (3) preparing the hollow covalent triazinyl skeleton material by taking the silicon dioxide nano spheres preparedin the step (1) as a template, dispersing the prepared hollow covalent triazinyl skeleton material powder into the MoS2 quantum dot solution prepared in the step (2), performing an ultrasonic treatment for 0.5-1.5 hours, adding acetone, stirring for 12-36 hours, collecting a product through centrifugation, washing with water, and drying to obtain the hollow covalent triazinyl skeleton material loaded with MoS2 quantum dots. The hollow covalent triazinyl skeleton material is used as a catalyst in hydrogen production by water decomposition under visible light, the catalytic activity of the hollow covalent triazinyl skeleton material is greatly improved, and water molecules can be efficiently and stably decomposed under visible light to produce hydrogen.

Description

technical field [0001] The invention belongs to the field of material preparation and relates to a MoS-loaded 2 The preparation method of the hollow covalent triazine-based framework material of quantum dots and the application as a catalyst in the decomposition of water to produce hydrogen under visible light. Background technique [0002] In recent years, the method of using sunlight to split water to produce hydrogen is considered to be a green and environmentally friendly technology that can effectively solve the energy crisis. For a long time, the search for efficient, stable, and green and harmless semiconductor materials has been a research hotspot. However, covalent triazine-based framework materials with good photoresponse have attracted much attention due to their metal-free, high catalysis and excellent chemical stability (Y.J.Wang, Q.S.Wang, X.Y.Zhan, F.M.Wang, M. Safdar, J.He, Nanoscale2013, 5, 8326–8339; b) Y.W. Zhang, J.H. Liu, G. Wu, W. Chen, Nanoscale2012,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/34C01B3/04
CPCB01J31/34B01J35/004C01B3/042C01B2203/1047C01B2203/0277Y02E60/36
Inventor 曾滔赖维顺郦淑琦宋爽
Owner ZHEJIANG UNIV OF TECH
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