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

An organic hybrid, cobalt metal technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, inorganic chemistry, etc., can solve problems such as difficulty and poor catalytic activity, and achieve high efficiency and stability Effects of catalytic activity and excellent photocatalytic water splitting performance for hydrogen production

Active Publication Date: 2022-01-14
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 polyacrylic silicotungstate Preparation and photocatalytic application of acid-based cobalt metal-organic hybrid materials

Method used

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

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 preparation and photocatalytic application of a polyacid-based cobalt-metal organic hybrid material, the invention relates to a polyacid-based cobalt-metal organic hybrid material. The purpose of the present invention is to solve the problem that the photocatalytic hydrogen production material synthesized in the prior art has a wide band gap, the photogenerated electron holes are easy to recombine, and the surface reaction of proton reduction is difficult, etc., resulting in that the existing photocatalytic hydrogen production material does not produce problems such as hydrogen or low hydrogen production. This patent designs and develops a kind of polyacid-based cobalt metal-organic hybrid material whose chemical formula is (H 2 SiW 12 o 40 )[Co(pzta) 3 ] 2 4H 2 O. Synthesis method: Dissolve silicotungstic acid, cobalt chloride, and organic ligand 5‑(2‑pyrazinyl)‑1,2,4‑triazole in deionized water, adjust the pH to 2.0, and keep the temperature at 160°C Response 3 days. The invention can obtain a 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 Patents(China)
IPC IPC(8): B01J31/34C01B3/04
CPCB01J31/34B01J35/004C01B3/042C01B2203/0277Y02E60/36
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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