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Photocatalyst cd/cds containing cocatalyst cd and its preparation and application in photocatalytic hydrogen production

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

Inactive Publication Date: 2016-03-23
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 cocatalyst cd and its preparation and application in photocatalytic hydrogen production
  • Photocatalyst cd/cds containing cocatalyst cd and its preparation and application in photocatalytic hydrogen production
  • Photocatalyst cd/cds containing cocatalyst cd and its preparation and application in photocatalytic hydrogen production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Preparation of photocatalyst Cd / CdS

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

[0037] (2) 7.445gNa 2 S 2 o 3 ·5H 2 O was dissolved in 40 mL of distilled water to make a concentration of 0.75M 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 The O solution was mixed, stirred for 20 minutes, and then ultrasonically treated for 45 minutes at an ultrasonic power of 50 Hz;

[0039] (4) The mixed solution was reacted for 25 hours under a 350W xenon lamp, 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 hours, and ground to obtain a catalyst sample containing co-catalyst Cd, denoted as CC1. Wherein the mass percentage of Cd is 5%.

[0041] 2. Performance t...

Embodiment 2

[0044] 1. Preparation of photocatalyst Cd / CdS

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

[0046] (2) 8.935gNa 2 S 2 o 3 ·5H 2 O was dissolved in 40 mL of distilled water to make a concentration of 0.9M 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 minutes, and then ultrasonically treated for 15 minutes at an ultrasonic power of 100 Hz;

[0048] (4) The mixed solution was reacted for 15 hours under a 350W xenon lamp, 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 hours, and ground to obtain a catalyst sample containing co-catalyst Cd, denoted as CC2. Wherein the mass percentage of Cd is 12%.

[0050] 2. Performance t...

Embodiment 3

[0053] 1. Preparation of photocatalyst Cd / CdS

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

[0055] (2) 10.424gNa 2 S 2 o 3 ·5H 2 O was dissolved in 40 mL of distilled water to make a concentration of 1.05M 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 minutes, and then ultrasonically treated for 15 minutes at an ultrasonic power of 100 Hz;

[0057] (4) The mixed solution was reacted for 25 hours under a 350W xenon lamp, 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 hours, and ground to obtain a catalyst sample containing co-catalyst Cd, denoted as CC3. Wherein the mass percentage of Cd is 16%.

[0059] 2. Performanc...

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Abstract

The invention provides a photocatalyst Cd / CdS containing a cocatalyst Cd, which uniformly adheres elemental metal Cd on the surface of CdS, and belongs to the technical field of photocatalysis. The metal simple substance Cd introduced in the cadmium sulfide CdS of the present invention is used as a cocatalyst, which can effectively separate photogenerated electrons and hole pairs, greatly improves the photocatalytic hydrogen production efficiency of CdS, and expands the use of CdS in the photocatalytic water splitting hydrogen production reaction The application of high-efficiency photocatalyst Cd / CdS was directly synthesized by photochemical method, the structure and performance are relatively stable, and it can be recycled in the photocatalytic water splitting hydrogen production reaction. In addition, the synthesis method of the invention is simple, the cost is low, the yield is high, and the industrialization prospect is good.

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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Patent Type & Authority Patents(China)
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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