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Photocatalyst Cd/CdS containing catalyst promoter Cd as well as preparation method and application of photocatalyst Cd/CdS in photocatalysis hydrogen production reaction

A photocatalyst and co-catalyst technology, applied in the field of photocatalysis, can solve the problems of CdS prone to photolytic corrosion, limitation, etc., and achieve the effect of improving the photocatalytic hydrogen production efficiency, low cost, stable structure and performance

Inactive Publication Date: 2013-09-25
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the photolytic corrosion of CdS, its application in photocatalytic water splitting for hydrogen production is limited.

Method used

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  • Photocatalyst Cd/CdS containing catalyst promoter Cd as well as preparation method and application of photocatalyst Cd/CdS in photocatalysis hydrogen production reaction
  • Photocatalyst Cd/CdS containing catalyst promoter Cd as well as preparation method and application of photocatalyst Cd/CdS in photocatalysis hydrogen production reaction
  • Photocatalyst Cd/CdS containing catalyst promoter Cd as well as preparation method and application of photocatalyst Cd/CdS in photocatalysis hydrogen production reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Preparation of photocatalyst Cd / CdS

[0036] (1) 4.617 g of 3CdSO 4 ·8H 2 O was dissolved in 40 mL of distilled water to form a 0.15 M solution;

[0037] (2) 7.445 gNa 2 S 2 o 3 ·5H 2 O was dissolved in 40 mL of distilled water to make a concentration of 0.75 M Na 2 S 2 o 3 ·5H 2 O solution;

[0038] (3) 3CdSO 4 ·8H 2 O solution and Na 2 S 2 o 3 ·5H 2 O solution was mixed, stirred for 20 min, and then ultrasonically treated for 45 min at an ultrasonic power of 50 Hz;

[0039] (4) The mixed solution was reacted under a 350W xenon lamp for 25 hours, and then heated in a 500W microwave oven for 15 minutes;

[0040] (5) The reaction solution was centrifuged at 8000 rpm to obtain a precipitate, washed 10 times with double distilled water, then washed 2 times with ethanol, dried at 80°C for 12 h, and ground to obtain a catalyst sample containing co-catalyst Cd, record for CC1. Wherein the mass percentage of Cd is 5%.

[0041] 2. Performance test

[0042]...

Embodiment 2

[0044] 1. Preparation of photocatalyst Cd / CdS

[0045] (1) 4.617 g of 3CdSO 4 ·8H 2 O was dissolved in 40 mL of distilled water to form a 0.15 M solution;

[0046] (2) 8.935 gNa 2 S 2 o 3 ·5H 2 O was dissolved in 40 mL of distilled water to make a concentration of 0.9 M Na 2 S 2 o 3 ·5H 2 O solution;

[0047] (3) 3CdSO 4 ·8H 2 O solution and Na 2 S 2 o 3 ·5H 2 The O solution was mixed, stirred for 20 min, and then ultrasonically treated for 15 min at an ultrasonic power of 100 Hz;

[0048] (4) The mixed solution was reacted under a 350W xenon lamp for 15 hours, and then heated in a 750W microwave oven for 5 minutes;

[0049] (5) The reaction solution was centrifuged at 8000 rpm to obtain a precipitate, washed 10 times with double distilled water, then washed 2 times with ethanol, dried at 80°C for 12 h, and ground to obtain a catalyst sample containing co-catalyst Cd, record for CC2. Wherein the mass percentage of Cd is 12%.

[0050] 2. Performance test

...

Embodiment 3

[0053] 1. Preparation of photocatalyst Cd / CdS

[0054] (1) 4.617 g of 3CdSO 4 ·8H 2 O was dissolved in 40 mL of distilled water to form a 0.15 M solution;

[0055] (2) 10.424 gNa 2 S 2 o 3 ·5H 2 O was dissolved in 40 mL of distilled water to make a concentration of 1.05 M Na 2 S 2 o 3 ·5H 2 O solution;

[0056] (3) 3CdSO 4 ·8H 2 O solution and Na 2 S 2 o 3 ·5H 2 The O solution was mixed, stirred for 20 min, and then ultrasonically treated for 15 min at an ultrasonic power of 100 Hz;

[0057] (4) The mixed solution was reacted under a 350W xenon lamp for 25 hours, and then heated in a 500W microwave oven for 20 minutes;

[0058] (5) The reaction solution was centrifuged at 8000 rpm to obtain a precipitate, washed 10 times with double distilled water, then washed 2 times with ethanol, dried at 80°C for 12 h, and ground to obtain a catalyst sample containing co-catalyst Cd, record for CC3. Wherein the mass percentage of Cd is 16%.

[0059] 2. Performance test ...

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Abstract

The invention provides photocatalyst Cd / CdS containing catalyst promoter Cd, which is obtained by uniformly attaching single-substance metal Cd on the surface of CdS, and belongs to the technical field of photocatalysis. The metal single-substance Cd in cadmium sulfide CdS is the catalyst promoter, so that photo-generated electrons and electron-hole pairs can be effectively separated, the photocatalysis hydrogen production efficiency of the CdS is greatly improved, and the application of the CdS in photocatalysis water decomposition hydrogen production reaction is expanded; efficient photocatalyst Cd / CdS is directly synthesized by adopting a photochemical method, so that the structure and the performances are relatively stable, and the efficient photocatalyst Cd / CdS can be recycled in the photocatalysis water decomposition hydrogen production reaction. Besides, the synthetic method of the photocatalyst Cd / CdS is simple, lower in cost, high in yield and good in industrial prospect.

Description

technical field [0001] The invention belongs to the field of photocatalysis, and relates to a photocatalyst Cd / CdS containing cocatalyst Cd. The invention also relates to a preparation method of the photocatalyst Cd / CdS; Applications in hydrogen production reactions. Background technique [0002] The use of solar photocatalytic water splitting to produce clean hydrogen energy has very important practical significance for maintaining the sustainable development of human beings. The preparation of photocatalysts with visible light activity has always been a difficulty and hot spot in the research of solar water splitting for hydrogen production. High-purity cadmium sulfide CdS is a good intrinsic n-type semiconductor material. Due to its direct transition energy level structure and large ionic bond composition, it has a strong photoelectric effect on visible light. Therefore, it is widely used in solar cells, photocatalysis, etc. aspects are applied. However, due to the phot...

Claims

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Application Information

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IPC IPC(8): B01J27/04C01B3/04
CPCY02E60/36
Inventor 王其召李佳佳连菊红柳樱华惠娟白燕张哲佘厚德刘相苏中兴
Owner NORTHWEST NORMAL UNIVERSITY
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