Method for preparing composite photocatalyst CdS/ZIF-8 by one-pot method and application of composite photocatalyst CdS/ZIF-8

A technology of ZIF-8 and complex light, which is applied in the direction of organic compound/hydride/coordination complex catalyst, chemical instrument and method, physical/chemical process catalyst, etc., can solve the problem of unsuitable industrial production application, complicated preparation steps, etc. problems, to achieve the effects of broad industrial application prospects, simple process, excellent hydrogen production performance and cycle stability

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A technology of ZIF-8 and complex light, which is applied in the direction of organic compound/hydride/coordination complex catalyst, chemical instrument and method, physical/chemical process catalyst, etc., can solve the problem of unsuitable industrial production application, complicated preparation steps, etc. problems, to achieve the effects of broad industrial application prospects, simple process, excellent hydrogen production performance and cycle stability

CN112588324AActive Publication Date: 2021-04-02HUNAN JINLIANXING SPECIAL MATERIALS CO LTD

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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 invention relates to a method for preparing a composite photocatalyst CdS / ZIF-8 by a one-pot method, which comprises the steps of S1, dissolving alcohol-soluble zinc salt and cadmium salt in methanol, stirring until the solution is clear and transparent to obtain a first solution, dissolving 2-methylimidazole in methanol, and stirring until the solution is clear and transparent to obtain a second solution; S2, quickly pouring the second solution into the first solution, stirring to obtain a mixed solution, and standing and reacting the mixed solution for a period of time; S3, adding alcohol-soluble sulfide into the mixed solution, and reacting while stirring; and S4, after the reaction is finished, separating precipitates, washing and drying to obtain the composite photocatalyst CdS / ZIF-8. The method has the advantages of few steps and simple process, and is suitable for industrial application. Experiment tests find that compared with pure CdS, the prepared CdS / ZIF-8 composite catalyst shows more excellent hydrogen production performance and cycling stability, the CdS / ZIF-8 composite catalyst has a wide industrial application prospect, and an important reference basis is provided for catalyst design.

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

02 Apr 2021

Publication

CN112588324A

IPC: B01J31/22; C01B3/04

CPC: B01J31/1691; C01B3/042; B01J2531/26; B01J35/39; Y02E60/36

Inventors: 陈建春; 孙毅东