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Preparation method and photocatalytic application of polyacid-based cobalt metal-organic hybrid material

A technology of organic hybridization and cobalt metal, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, inorganic chemistry, etc., can solve the problems of poor catalytic activity and difficulty, and achieve high efficiency and stability Catalytic activity, the effect of excellent photocatalytic water splitting hydrogen production performance

Active Publication Date: 2019-09-13
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the difficulty of synthesizing polyacid-based cobalt metal-organic hybrid materials using the prior art and the problem of poor catalytic activity of traditional polyacids as photocatalysts to decompose water and produce hydrogen, and to provide a polyacid-based cobalt metal-organic hybrid material. material preparation and

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  • Preparation method and photocatalytic application of polyacid-based cobalt metal-organic hybrid material
  • Preparation method and photocatalytic application of polyacid-based cobalt metal-organic hybrid material

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specific Embodiment approach 2

[0029] Specific embodiment two: present embodiment is a kind of preparation method of multi-acid-based cobalt metal-organic hybrid material and is completed according to the following steps:

[0030] 1. Prepare a reaction solution with a pH value of 2.0: dissolve silicotungstic acid, cobalt chloride, and 5-(2-pyrazinyl)-1,2,4-triazole organic ligand into deionized water to obtain a reaction solution ; Adjust the pH value of the reaction solution to 2.0 to obtain a reaction solution with a pH value of 2.0;

[0031] The molar ratio of silicotungstic acid described in step 1 to metal cobalt salt is: 0.1: (0.2~1);

[0032]The molar ratio of silicotungstic acid and 5-(2-pyrazinyl)-1,2,4-triazole organic ligand described in step 1 is: 0.1:(0.2~0.5);

[0033] The volume ratio of the amount of silicotungstic acid described in step 1 to distilled water is: 0.1mmol: (20ml~35ml);

[0034] 2. Add the reaction solution with a pH value of 2.0 into a polytetrafluoroethylene reactor, react ...

specific Embodiment approach 3

[0036] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the metal cobalt salt described in step one is cobalt chloride, cobalt nitrate or cobalt acetate. Others are the same as in the second embodiment.

specific Embodiment approach 4

[0037] Embodiment 4: The difference between this embodiment and Embodiments 2 to 3 is that the molar ratio of silicotungstic acid and metal cobalt salt described in step 1 is: 1:10. Others are the same as the second or third specific embodiment.

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Abstract

The invention relates to a preparation method and a photocatalytic application of a polyacid-based cobalt metal-organic hybrid material, and also relates to the polyacid-based cobalt metal-organic hybrid material. The purpose of the present invention is to solve the problem of zero or low hydrogen yield of existing photocatalytic hydrogen production materials synthesized in the prior art, caused by wide forbidden bandwidth, easy photogenerated electron-hole recombination and difficult proton reduction surface reaction of the existing photocatalytic hydrogen production materials. The polyacid-based cobalt metal-organic hybrid material with a chemical formula (H2SiW12O40)[Co(pzta)3]2.4H2O is designed and developed in the invention. The synthesis method comprises the following steps: dissolving silicotungstic acid, cobalt chloride and an organic ligand 5-(2-pyrazinyl)-1,2,4-triazole in deionized water, adjusting the pH value of the obtained solution to 2.0, and carrying out a reaction ata temperature of 160 DEG C for 3 days to obtain the polyacid-based cobalt metal-organic hybrid material.

Description

technical field [0001] The invention relates to a polyacid-based cobalt metal-organic hybrid material. Background technique [0002] Facing the dual challenges of environment and energy, the key issue today is to find and utilize clean, safe and renewable new energy. However, solar energy in nature is ubiquitous, it is a renewable energy, and it is also an environmentally friendly and green and clean energy. Photocatalysis, which can convert solar energy into hydrogen and oxygen energy or high value-added chemical products, has attracted more and more attention from chemists and material scientists. To achieve high-efficiency photocatalytic conversion of solar energy, the design of photocatalysts is a core issue. [0003] Polyoxometalates (POMs) are a class of inorganic functional materials with excellent physicochemical properties, including tunable acidity, redox properties, oxidation resistance, thermal stability, and good optoelectronic properties, becoming a new class...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/34C01B3/04
CPCB01J31/34C01B3/042C01B2203/0277B01J35/39Y02E60/36
Inventor 庞海军李柏男马慧媛于晓晶王新铭谭立超
Owner HARBIN UNIV OF SCI & TECH
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