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Keggin type heteropolyacid insoluble salt heterojunction catalyst as well as preparation method and application thereof

A heteropolyacid and heterojunction technology, which is applied in the field of Keggin type heteropolyacid insoluble salt heterojunction catalyst and its preparation field, can solve the problems of difficult formation of complexes, etc. Small effects of shunt loss or broken parts

Active Publication Date: 2021-09-17
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to form complexes between polyacids and bismuth-based photocatalysts, and it is necessary to introduce adhesive polymers, such as SiW 9 co 3 / PDA / Bi 2 WO 6 (J.Mater.Chem.A 2020,8(32),16590-16598)

Method used

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  • Keggin type heteropolyacid insoluble salt heterojunction catalyst as well as preparation method and application thereof
  • Keggin type heteropolyacid insoluble salt heterojunction catalyst as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] This embodiment provides a Cs 3 PW 12 o 40 @δ-Bi 2 o 3 The preparation method of heterojunction catalyst is as follows: 20mg Cs 3 PW 12 o 40 Powder, dispersed in 20mL ethylene glycol-water mixed solution (V 乙二醇 :V 水 =4:1). After ultrasonication for 15min, add 970mg Bi(NO 3 ) 3 ·5H 2 O, stirred at room temperature for 1 h. The above mixture was transferred to a closed reaction kettle, and stirred and heated at 150°C for 4h. The samples taken out were washed three times with ultrapure water and absolute ethanol, and dried at room temperature to obtain Cs 3 PW 12 o 40 @δ-Bi 2 o 3 heterojunction catalysts.

Embodiment 2

[0025] This embodiment provides a kind of [Ru(bpy) 3 ] 2.5 SiFe(OH 2 )W 11 o 39 @δ-Bi 2 o 3 The preparation method of heterojunction catalyst is as follows: 40mg[Ru(bpy) 3 ] 2.5 SiFe(OH 2 )W 11 o 39 Powder, dispersed in 20mL ethylene glycol-water mixed solution (V 乙二醇 :V 水 =3:1). After ultrasonication for 15min, add 490mg Bi(NO 3 ) 3 ·5H 2 O, stirred at room temperature for 1 h. The above mixture was transferred to a closed reaction kettle, and stirred and heated at 170° C. for 4 h. After the sample taken out was washed three times with ultrapure water and absolute ethanol, and dried at room temperature to obtain [Ru(bpy) 3 ] 2.5 SiFe(OH 2 )W 11 o 39 @δ-Bi 2 o 3 heterojunction catalysts.

Embodiment 3

[0027] This embodiment provides an Ag 4 SiMo 12 o 40 @δ-Bi 2 o 3 The preparation method of heterojunction catalyst is as follows: 250mg Ag 4 SiMo 12 o 40 Powder, dispersed in 20mL ethylene glycol. After ultrasonication for 15min, add 17.8mg Bi 2 (SO 4 ) 3 , stirred at room temperature for 1 h. The above mixture was transferred to a closed reaction kettle, and stirred and heated at 190°C for 4h. The samples taken out were washed three times with ultrapure water and absolute ethanol respectively, and dried at room temperature to obtain Ag 4 SiMo 12 o 40 @δ-Bi 2 o 3 heterojunction catalysts.

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Abstract

The invention discloses a Keggin type heteropolyacid insoluble salt heterojunction catalyst as well as a preparation method and application thereof, and belongs to the technical field of preparation of polyacid composite materials. The preparation method of the catalyst comprises the following steps: adding a Keggin type heteropolyacid insoluble salt, a bismuth precursor salt and an organic solvent (an organic-water mixed solvent) into a closed container, reacting at 150-250 DEG C, and drying to obtain the Keggin type heteropolyacid insoluble salt heterojunction catalyst. The method is simple in preparation process, controllable in condition, stable in composite structure and low in cost; and the prepared Keggin type heteropolyacid insoluble salt heterojunction material has good photocatalytic performance and can be used for photocatalytic nitrogen reduction, oxygen reduction and the like.

Description

technical field [0001] The invention belongs to the technical field of polyacid composite materials, and in particular relates to a Keggin type heteropolyacid refractory salt heterojunction catalyst and its preparation method and application. Background technique [0002] In the context of the energy, environment and climate crisis caused by the depletion of fossil energy and greenhouse gas emissions, starting from the abundant available small molecules (such as nitrogen, oxygen, water) in the environment, driven by renewable light energy, to Synthesize compounds with economic added value (such as ammonia, hydrogen peroxide, etc.) to meet the needs of daily chemical products. However, this synthetic route has problems such as low photocatalytic efficiency (short lifetime of photogenerated carriers and narrow photoresponse range), difficulty in generating high-value products, and high industrial production costs. Therefore, inventing highly efficient and highly selective pho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/18B01J31/22B01J27/188B01J27/19B01J23/68B01J27/199C01C1/02C01B15/027
CPCB01J27/188B01J27/19B01J23/686B01J27/199B01J31/183C01C1/02C01B15/027B01J35/39Y02P20/52
Inventor 刘季铨薛岗林杨鹏赵瑞雪
Owner NORTHWEST UNIV
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