Preparation and photocatalytic application of polyacid-based manganese organic hybrid material constructed by silicotungstate

A metal-organic, multi-acid-based manganese technology, applied in organic compound/hydride/coordination complex catalysts, 7/17 group organic compounds without C-metal bonds, organic chemistry, etc., can solve the problem of poor catalytic activity, Difficulty and other problems, to achieve the effect of high efficiency and stable catalytic activity, excellent photocatalytic water splitting hydrogen production performance

Pending Publication Date: 2021-03-09
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to solve the difficulty of synthesizing polyacid-based manganese metal-organic hybrid materials using the prior art and the poor catalytic activity of traditional polyacids as photocatalysts to decompose water and produce hydrogen, and to provide a multi-acid silicotungstate Preparation of acid-based manganese metal-organic hybrid materials and

Method used

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  • Preparation and photocatalytic application of polyacid-based manganese organic hybrid material constructed by silicotungstate
  • Preparation and photocatalytic application of polyacid-based manganese organic hybrid material constructed by silicotungstate
  • Preparation and photocatalytic application of polyacid-based manganese organic hybrid material constructed by silicotungstate

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specific Embodiment approach 2

[0029] Specific embodiment two: the present embodiment is a kind of preparation method of polyacid-based manganese metal-organic hybrid material constructed by silicotungstate, which is completed according to the following steps:

[0030]1. Prepare a reaction solution with a pH value of 2.0: dissolve silicotungstic acid, manganese 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 step 1 to the metal manganese 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 ...

specific Embodiment approach 3

[0036] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the metal manganese salt described in step one is manganese chloride, manganese nitrate or manganese 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 manganese 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 discloses preparation and photocatalytic application of a polyacid-based manganese organic hybrid material constructed by silicotungstate, and relates to a polyacid-based manganese organic hybrid material constructed by silicotungstate. The invention aims to solve the problems that the forbidden band width of the photocatalytic hydrogen production material synthesized in the prior art is relatively wide, photo-induced electron holes are easy to compound, the surface reaction of proton reduction is relatively difficult and the like, so that the existing photocatalytic hydrogen production material does not produce hydrogen or the hydrogen production amount is relatively low. The invention designs and develops a polyacid-based manganese organic hybrid material constructed by silicotungstate. The chemical formula of the polyacid-based manganese organic hybrid material is (H2SiW12O40)[Mn(pzta)3]2.4H2O. The synthesis method comprises the following steps: dissolving silicotungstic acid, manganese chloride and an organic ligand 5-(2-pyrazinyl)-1,2,4-triazole into deionized water, adjusting the pH value to 2.0, and reacting for 3 days at 160 DEG C; according to the invention,the polyacid-based manganese organic hybrid material constructed by silicotungstate can be obtained.

Description

technical field [0001] The invention relates to a polyacid-based manganese 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 optoelectroni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F13/00B01J31/22B01J37/10C01B3/04
CPCC07F13/005B01J31/1815B01J37/10C01B3/042C01B2203/1088B01J2531/72Y02E60/36
Inventor 庞海军肖博鑫李柏男马慧媛张春晶王新铭
Owner HARBIN UNIV OF SCI & TECH
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