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Preparation and photocatalytic application of a multi-acid-based iron metal-organic hybrid material

A technology of organic hybridization and iron metal, applied in the direction of organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, 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: 2021-12-07
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

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

Method used

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  • Preparation and photocatalytic application of a multi-acid-based iron metal-organic hybrid material
  • Preparation and photocatalytic application of a multi-acid-based iron metal-organic hybrid material
  • Preparation and photocatalytic application of a multi-acid-based iron 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 polyacid-based iron 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, ferric 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 the silicotungstic acid described in the step 1 and the metal iron 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 the polytetrafluoroethylene reacti...

specific Embodiment approach 3

[0036] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the metal iron salt described in step one is ferric chloride, ferric nitrate or ferric 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 iron 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 multi-acid-based iron-metal organic hybrid material, the invention relates to a multi-acid-based iron 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 Hydrogen or low hydrogen production and other issues. This patent designs and develops a kind of polyacid-based metal-organic hybrid material whose chemical formula is (H 2 SiW 12 o 40 )[Fe(pzta) 3 ] 2 4H 2 O. Synthesis method: Dissolve silicotungstic acid, ferric 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 iron metal-organic hybrid material.

Description

technical field [0001] The invention relates to a polyacid-based iron metal-organic hybrid material constructed by silicotungstate. 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 pro...

Claims

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Application Information

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Patent Type & Authority Patents(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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