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

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

CN112588324BActive Publication Date: 2022-04-26HUNAN JINLIANXING SPECIAL MATERIALS CO LTD
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  • One-pot preparation method and application of composite photocatalyst cds/zif-8
  • One-pot preparation method and application of composite photocatalyst cds/zif-8
  • 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

Patent Timeline
26 Apr 2022
Publication
CN112588324B
IPC
B01J31/22; C01B3/04
CPC
B01J31/1691; C01B3/042; B01J2531/26; B01J35/39; Y02E60/36
Inventors
陈建春; 孙毅东