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z-type heterojunction co 9 s 8 /nh 2 Preparation method of -uio-66 composite material and its application in photocatalysis

A composite material, nh2-uio-66 technology, applied in the field of catalysis, can solve the problems of low output, unsatisfactory heating, expensive use, etc., and achieve the effects of large specific surface area, accelerated catalytic reaction rate, and good catalytic performance

Active Publication Date: 2022-07-19
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, issues such as the use of expensive toxic strong acids, low yields, and prolonged heating for multicomponent Biginelli reactions remain undesired limitations for Biginelli synthesis.

Method used

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  • z-type heterojunction co <sub>9</sub> s <sub>8</sub> /nh <sub>2</sub> Preparation method of -uio-66 composite material and its application in photocatalysis
  • z-type heterojunction co <sub>9</sub> s <sub>8</sub> /nh <sub>2</sub> Preparation method of -uio-66 composite material and its application in photocatalysis
  • z-type heterojunction co <sub>9</sub> s <sub>8</sub> /nh <sub>2</sub> Preparation method of -uio-66 composite material and its application in photocatalysis

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Experimental program
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Effect test

Embodiment 1

[0029] Example 1 Z-type heterojunction Co 9 S 8 / NH 2 -UiO-66 composite

[0030] (1) The preparation method is as follows:

[0031] (1) ZrCl 4(61.2 mg, 0.26 mmol) and 2-aminoterephthalic acid (87 mg, 0.48 mmol) were dissolved in 60 mL of DMF, and after mixing and stirring for 5 min, 7.2 mL of glacial acetic acid solution was added thereto, and the mixture was uniformly mixed. The resulting mixture was continuously heated and stirred in an oil bath at 120 °C for 12 h to produce a yellow solid, which was centrifuged, washed and dried to obtain the product NH 2 - UiO-66.

[0032] (2) CoCl 2 ·6H 2 O (34.04 mg, 0.14 mmol) was dissolved in 15 mL of deionized water, and after stirring, 10 mL of Na 2 S·9H 2 Aqueous O solution (containing Na 2 S·9H 2 O 171.80 mg, 1.79 mmol) was slowly added to CoCl 2 ·6H 2 In the O aqueous solution, the Co / S molar ratio is 1:5. The mixed solution was then continuously stirred for 30 min. Transfer to a 50mL reaction kettle and heat at 120...

Embodiment 2

[0040] Example 2 Z-type heterojunction Co 9 S 8 / NH 2 - Catalytic function of UiO-66 composites for Biginelli reaction

[0041] (1) Co 9 S 8 Effect of Nanoparticle Addition on Catalytic Biginelli Reaction

[0042] Take 50mg NH 2 -UiO-66, add 2.5mg, 5.0mg, 10.0mg Co respectively 9 S 8 The nanoparticles were dispersed in 25 mL of ethanol solution, sonicated for 30 min, and then the resulting mixture was stirred at 70 °C for about 2 h, and the ethanol solvent was evaporated to induce Co 9 S 8 Nanoparticles in NH 2 - Composite on UiO-66. Finally, it was dried in a vacuum drying oven at 60 °C to obtain the target product Co 9 S 8 / NH 2 - UiO-66 composites, labeled 5% Co, respectively 9 S 8 / NH 2 -UiO-66, 10%Co 9 S 8 / NH 2 -UiO-66, 20%Co 9 S 8 / NH 2 -UiO-66.

[0043] Method: Take 20mg of different Co 9 S 8 Loaded Z-type heterojunction Co 9 S 8 / NH 2 -UiO-66 composite material, 1 mmol of benzaldehyde, 1 mmol of ethyl acetoacetate and 1.5 mmol of urea were ...

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Abstract

The present invention relates to Z-type heterojunction Co 9 S 8 / NH 2 Preparation method of ‑UiO‑66 composite and its application in photocatalysis. The Z-type heterojunction Co 9 S 8 / NH 2 ‑UiO‑66 composite is a 9 S 8 Nanoparticles loaded into metal-organic framework NH 2 ‑UiO‑66 surface, forming a heterojunction. The preparation method is as follows: NH is synthesized separately by hydrothermal method 2 ‑UiO‑66 and Co 9 S 8 Nanoparticles; NH 2 ‑UiO‑66 and Co 9 S 8 Nanoparticles were dispersed in ethanol solution by ultrasonication and then evaporated the ethanol solvent to induce Co 9 S 8 Nanoparticles in NH 2 ‑UiO‑66 was compounded, and the target product was obtained by vacuum drying. Co provided by the present invention 9 S 8 / NH 2 The ‑UiO‑66 composite exhibited good catalytic performance for the Biginelli reaction.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and in particular relates to a metal organic framework NH 2 -UiO-66(Zr) load Co 9 S 8 Preparation method of Z-type heterojunction composite material formed by nanoparticles and application of efficient catalysis of Biginelli reaction under mild conditions without solvent and co-catalyst. Background technique [0002] Semiconductors play a central role in photocatalytic reactions. They can absorb solar energy and directly convert them into solar fuels such as hydrogen, methane, and formic acid, thereby alleviating energy problems in contemporary society. However, the electron-hole recombination speed of semiconductor is fast, the light utilization rate is low, and the light conversion efficiency of photocatalytic reaction is very low. The researchers used the method of semiconductor recombination to improve the activity of photocatalyst. Metal-organic frameworks (MOFs) have the advantages of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22B01J27/043B01J31/28B01J35/10C07D239/22
CPCB01J31/1691B01J31/1616B01J27/043B01J31/28C07D239/22B01J35/23B01J35/61B01J35/39
Inventor 刘琳陈强罗四维陶志鹏李晨宁
Owner LIAONING UNIVERSITY
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