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One-pot preparation method and application of composite photocatalyst cds/zif-8

A ZIF-8, composite light technology, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of unsuitable industrial production applications, complex preparation steps, etc. problem, to achieve the effect of high-efficiency photo-splitting water hydrogen production performance, simple process, and few method steps

Active Publication Date: 2022-04-26
HUNAN JINLIANXING SPECIAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above method requires the use of surfactants, multiple transfers of reaction materials, heating and drying, roasting and other operations, and there are complicated preparation steps, which are not suitable for industrial production applications.

Method used

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  • One-pot preparation method and application of composite photocatalyst cds/zif-8

Examples

Experimental program
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Effect test

Embodiment 1

[0043] In this example, a one-pot method is used to prepare the composite photocatalyst CdS / ZIF-8, and the steps are:

[0044] (1) Add 1mmol Zn(NO 3 ) 2 ·6H 2 O and 9mmol Cd(NO 3 ) 2 4H 2O was added into 100mL of methanol together, stirred until clear and transparent, and solution A was obtained.

[0045] (2) 18mmol C 4 h 6 N 2 (2-Methylimidazole) was added into 100 mL of methanol, stirred until clear and transparent, and solution B was obtained.

[0046] (3) After mixing solutions A and B, let them stand for aging for 11 hours, and then add 27 mmol CH to the mixed solution 4 N 2 S (ammonium thiocyanate), stirred for 3h, and centrifuged to obtain a yellow reaction product.

[0047] (4) After the reaction, the reaction product was alternately washed three times with distilled water and ethanol, and dried at 50°C to obtain the supported composite photocatalyst CdS / ZIF-8.

[0048] During the one-pot preparation of CdS / ZIF-8, adding Zn ions, Cd ions and excess 2-methyl...

Embodiment 2

[0050] This embodiment is on the basis of embodiment 1, the "18mmol C in step (2) 4 h 6 N 2 (2-Methylimidazole)" was changed to "27mmol C 4 h 6 N 2 (2-Methylimidazole)".

Embodiment 3

[0052] This embodiment is on the basis of embodiment 1, the "27mmol CH in step (3) 4 N 2 S (ammonium thiocyanate)" to "36mmol CH 4 N 2 S (ammonium thiocyanate)".

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Abstract

The present invention relates to the method for preparing composite photocatalyst CdS / ZIF-8 by one-pot method, comprising the following steps: S1: dissolving alcohol-soluble zinc salt and cadmium salt in methanol, stirring until clear and transparent to obtain the first solution; Methylimidazole is dissolved in methanol, stirred until clear and transparent to obtain a second solution; S2: quickly pour the second solution into the first solution, stir to obtain a mixed solution, and leave the mixed solution to react for a period of time; S3: In this mixed solution, add alcohol-soluble sulfide-, react under stirring; S4: After the reaction finishes, separate precipitation, wash, dry, obtain composite photocatalyst CdS / ZIF-8. The method of the invention has few steps, simple process and is suitable for industrial application. Through experimental tests, it was found that compared with pure CdS, the prepared CdS / ZIF-8 composite catalyst showed better hydrogen production performance and cycle stability, which showed that it had broad industrial application prospects and provided a basis for catalyst design. important reference.

Description

technical field [0001] The invention relates to the technical field of hydrogen production catalysts, in particular to a method for preparing a composite photocatalyst CdS / ZIF-8 by a one-pot method and an application thereof. Background technique [0002] In recent years, with the excessive development and utilization of fossil fuels, a series of environmental pollution and energy crisis have been caused. Photocatalytic hydrogen production technology is a green and pollution-free potential new technology that can produce hydrogen energy. Since Japanese scholars discovered TiO in 1972 2 After it can be used as a photocatalytic hydrogen production reaction, more and more scientific researchers have begun to pay attention to and study the photocatalytic water splitting hydrogen production reaction. Mechanism of photocatalytic hydrogen production: When light irradiates the surface of a semiconductor catalyst, if the energy of sunlight is greater than the band gap energy of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22C01B3/04
CPCB01J31/1691B01J35/004C01B3/042B01J2531/26Y02E60/36
Inventor 陈建春孙毅东潘春旭
Owner HUNAN JINLIANXING SPECIAL MATERIALS CO LTD
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