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Preparation method and application of cobalt-based metal organic framework compound containing Co4O4 quasi-cubic alkane structure

A technology of organic frameworks and compounds, applied in the preparation method and application field of cobalt-based metal-organic framework catalysts, can solve the problems of unfavorable mechanism research and practical application, poor stability, etc., and achieve easy large-scale promotion and application, easy operation, and good application foreground effect

Active Publication Date: 2021-11-12
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the natural oxygen production center and Mn 4 Ca-clusters are less stable in water, which is not conducive to mechanistic studies and practical applications

Method used

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  • Preparation method and application of cobalt-based metal organic framework compound containing Co4O4 quasi-cubic alkane structure
  • Preparation method and application of cobalt-based metal organic framework compound containing Co4O4 quasi-cubic alkane structure
  • Preparation method and application of cobalt-based metal organic framework compound containing Co4O4 quasi-cubic alkane structure

Examples

Experimental program
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Effect test

Embodiment 1

[0045] (E)-4,4',4",4"'-(N,N,N',N'-tetraphenyl-p-diaminoazobenzene in the azo-linked triphenylamine carboxylic acid derivative ) formic acid C 40 h 28 N 4 o 8 (17.3mg, 0.025mmol), CoCl 2 ·6H 2 O (24.0mg, 0.10mmol) was dissolved in N,N'-dimethylformamide (4mL) and deionized water (2mL) and stirred evenly, then the solution was placed in an oven and fired at 130°C for 72h. After closing the oven and cooling to room temperature, reddish-brown transparent diamond-like crystals were produced, filtered and dried to obtain the target material Co-L with a yield of about 56%. Infrared spectrum peak positions (IR): 3426(w), 2930(w), 1680(s), 1647(vs), 1592(vs), 1500(m), 1392(vs), 1315(vs), 1264( m), 1179(m), 1147(s), 1101(w), 843(m), 786(s), 701(w), 560(m), 521(w), 472(w)cm -1 . The obtained target material structure is as figure 1 , figure 2 , image 3 and Figure 4 shown. Figure 1-4 The specific structure of the target material is given, from figure 1 In a, it can be s...

Embodiment 2

[0047] (E)-4,4',4",4"'-(N,N,N',N'-tetraphenyl-p-diaminoazobenzene in the azo-linked triphenylamine carboxylic acid derivative ) formic acid C 40 h 28 N 4 o 8 (17.3mg, 0.025mmol), Co(NO 3 ) 2 ·6H 2 O (30.0mg, 0.10mmol) was dissolved in N,N'-dimethylformamide (4mL) and deionized water (2mL) and stirred evenly, then the solution was placed in an oven and fired at 130°C for 72h. After closing the oven and cooling to room temperature, reddish-brown transparent diamond-like crystals were produced, filtered and dried to obtain the target material Co-L with a yield of about 49%.

Embodiment 3

[0049] (E)-4,4',4",4"'-(N,N,N',N'-tetraphenyl-p-diaminoazobenzene in the azo-linked triphenylamine carboxylic acid derivative ) formic acid C 40 h 28 N 4 o 8 (34.6 mg, 0.05 mmol), CoCl 2 ·6H 2 O (48.0mg, 0.20mmol) was dissolved in N,N'-dimethylformamide (80mL) and deionized water (40mL) and stirred evenly, and the solution was placed in a 250mL eggplant-shaped flask at 130°C Heated under reflux for 24 hours, stopped heating and cooled to room temperature, filtered, and dried to obtain an orange powder, and the target material Co-L with a micron size was obtained. The scanning electron microscope picture (SEM) of the micron size target material that obtains is as Figure 9 shown.

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Abstract

The invention discloses a preparation method and application of a cobalt-based metal organic framework catalyst containing a Co4O4 quasi-cubic alkane structure. A triphenylamine carboxylic acid derivative L containing an azo functional group is used as a bridging ligand, and Co < 2 + > in transition metal salt Tm is used as a metal node; a three-dimensional metal organic framework compound Tm-L containing the Co4O4 quasi-cubic alkane structure is prepared by a solvothermal synthesis method, and the metal organic framework Tm-L not only simulates a natural oxygen production active center in structure, but also realizes multiphase of a homogeneous catalyst; meanwhile, due to the hydrophobicity of the azotriphenylamine derivative carboxylic acid ligand and a semi-open space formed by the azotriphenylamine derivative carboxylic acid ligand and the Co4O4 cluster, the water stability of the catalyst is ensured, and meanwhile, the entry of water molecules and the contact with catalytic active sites are enhanced. A multiphase photocatalytic water decomposition oxygen and hydrogen production experiment shows that the metal organic framework material Tm-L is a good bifunctional promoter and has a good application prospect in the field of photocatalytic water decomposition.

Description

technical field [0001] The present invention relates to a kind of Co containing 4 o 4 The invention discloses a preparation method and application of a cobalt-based metal-organic framework catalyst with a quasi-cubane structure, belonging to the technical field of catalytic materials. Background technique [0002] With the rapid development of human society, the degree of industrialization is getting higher and higher, followed by severe global climate problems and environmental pollution problems caused by the extensive use of fossil fuels. Therefore, finding clean and efficient renewable energy to replace traditional fossil energy has become a research hotspot and difficulty in today's society. Artificial photosynthesis simulates the water splitting process of natural photosynthesis to convert solar energy into chemical energy, which is a very promising renewable energy utilization technology. A typical water splitting process requires the coupling of two half-reactions...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J31/28C01B3/04C01B13/02C07C245/08
CPCB01J31/1691B01J31/2239B01J31/28C01B3/042C01B13/0207C07C245/08C07C253/30C01B2203/0277C01B2203/1052B01J2231/70B01J2231/62B01J2531/845B01J35/39C07C255/58Y02E60/36
Inventor 章福祥郭向阳刘利芳肖宇肖晔珺祁育
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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