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Cobalt-based metal organic framework material and application

An organic framework and metal-based technology, which is applied in the field of photocatalytic carbon dioxide reduction technology and energy conversion materials, can solve the problems of unclear structural components and difficult elucidation of active sites, and is conducive to large-scale production, easy to separate and wash Clean, Process-Effective Effects

Active Publication Date: 2020-06-19
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although most semiconductor nanomaterials have high photocatalytic properties, complex structural components and unobvious active sites are often difficult to elucidate when studying the reaction mechanism

Method used

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  • Cobalt-based metal organic framework material and application
  • Cobalt-based metal organic framework material and application
  • Cobalt-based metal organic framework material and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take organic ligand 1,3,5-trimethyl-2,4,6-tricarboxyphenylbenzene 9.6 mg, 1,4-bis(1-imidazolyl)benzene 4.2 mg, cobalt perchlorate hexahydrate 14.6 mg mg was dissolved in 3.0 mL of N,N-dimethylformamide and 1.0 mL of deionized water, then 50 μL of fluoboric acid was added dropwise, ultrasonicated for 30 min, and reacted at a constant temperature of 140 °C for 72 h, and then removed Cool down to room temperature, wash and dry in vacuum to obtain blue transparent bulk crystals, that is, cobalt-based metal-organic framework (Co-MOF). Depend on Figure 1-2 It can be seen that metal cobalt ions adopt a six-coordination configuration in the material, and the entire structure belongs to a three-dimensional structure. Depend on image 3 It can be seen from the thermogravimetric diagram that the material is stable to 430 in air o C or so. For XRD test data, see Figure 4 , the powder diffraction peak of the prepared sample is highly consistent with the diffraction peak of th...

Embodiment 2

[0033] Take organic ligand 1,3,5-trimethyl-2,4,6-tricarboxyphenylbenzene 9.6 mg, 1,4-bis(1-imidazolyl)benzene 4.2 mg, cobalt perchlorate hexahydrate 14.6 mg mg was dissolved in 3.0 mL of N,N-dimethylformamide and 1.0 mL of deionized water, then 50 μL of fluoboric acid was added dropwise, ultrasonicated for 30 min, and reacted at a constant temperature of 120 °C for 72 h, and then removed Cool down to room temperature, wash and dry in vacuum to obtain blue transparent bulk crystals, that is, cobalt-based metal-organic framework (Co-MOF). After XRD inspection, the test data is consistent with the XRD of Example 1, which can prove that the obtained sample is a material with high purity.

Embodiment 3

[0035]Take organic ligand 1,3,5-trimethyl-2,4,6-tricarboxyphenylbenzene 9.6 mg, 1,4-bis(1-imidazolyl)benzene 4.2 mg, cobalt perchlorate hexahydrate 14.6 mg mg was dissolved in 3.0 mL of N,N-dimethylformamide and 1.0 mL of deionized water, then 50 μL of fluoboric acid was added dropwise, ultrasonicated for 30 min, and reacted at a constant temperature of 120 °C for 48 h, and then removed Cool down to room temperature, wash and dry in vacuum to obtain blue transparent bulk crystals, that is, cobalt-based metal-organic framework (Co-MOF). After XRD inspection, the test data is consistent with the XRD of Example 1, which can prove that the obtained sample is a material with high purity.

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Abstract

The invention relates to a cobalt-based metal organic framework material with photocatalytic CO2 reduction performance and a preparation method. A solvothermal method is adopted for synthesis. Cobaltperchlorate hexahydrate, 1, 3, 5-trimethyl-2, 4, 6-tricarboxyl phenyl benzene, 1, 4-di (1-imidazolyl) benzene, N, N-dimethylformamide, fluoboric acid and water are synthesized in a polytetrafluoroethylene reaction kettle to obtain blue blocky crystals, and the blue crystals are washed and dried to obtain the photocatalytic material. The preparation method of the material is relatively simple. Theobtained catalyst has relatively good photocatalytic CO2 reduction capability, the selectivity of the reduction product CO can reach 77%, and the average yield of CO is 1124.8 [mu] mol g<-1> h<-1>. The material can be used as a cheap and efficient photocatalyst to replace precious metal, and the material shows a good application prospect in the field of photocatalysis.

Description

technical field [0001] The invention belongs to the field of photocatalytic carbon dioxide reduction technology and energy conversion materials, the preparation method of metal organic framework material and its application in photocatalytic CO 2 Restoration applications. Background technique [0002] With the continuous development of society, the use of fossil fuels since the industrial revolution has greatly increased the productivity of human society, but it has caused a series of serious problems such as global warming, which has gradually attracted the attention of countries all over the world. Shortages are already occurring in most countries and even globally. Solar energy is an inexhaustible clean energy. Photocatalysis is a high-efficiency, low-energy, clean, and non-secondary pollution-free technology, and photocatalytic carbon dioxide reduction (conversion into hydrocarbon fuels or chemicals) is considered to be one of the most promising solutions. Although mo...

Claims

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Application Information

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IPC IPC(8): C08G83/00B01J31/22
CPCC08G83/008B01J31/1691B01J2531/845B01J35/39
Inventor 赵君贾敬李东升董文文吴亚盘兰亚乾吴涛
Owner CHINA THREE GORGES UNIV
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