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Zinc cadmium sulfide nanorod and nickel nanorod heterojunction photocatalyst, preparation method thereof, hydrogen production system and hydrogen production method

A technology of zinc cadmium sulfide and photocatalyst, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, chemical instrument and method, etc. It can solve the problems of easy photocorrosion, poor stability, easy recombination of photogenerated electrons and holes, etc. , to achieve the effects of improving hydrogen production efficiency, avoiding recombination, and improving migration performance

Pending Publication Date: 2021-08-06
WUHAN INSTITUTE OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among many photocatalytic materials, ZnCdS is a visible light-responsive photocatalyst, compared with other photocatalysts (such as TiO 2 , g-C 3 N 4 etc.) has good photocatalytic hydrogen production ability, but its photogenerated electrons and holes are easy to recombine, and it is prone to photocorrosion and poor stability. In order to promote the rapid transfer of carriers and prevent photocorrosion, by constructing a heterostructure Can improve the stability and photocatalytic performance of the material

Method used

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  • Zinc cadmium sulfide nanorod and nickel nanorod heterojunction photocatalyst, preparation method thereof, hydrogen production system and hydrogen production method
  • Zinc cadmium sulfide nanorod and nickel nanorod heterojunction photocatalyst, preparation method thereof, hydrogen production system and hydrogen production method

Examples

Experimental program
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Effect test

Embodiment 1

[0051] 1) Dissolve 2mmol cadmium chloride, 2mmol zinc chloride, 0.4g urea and 8mmol cysteine ​​in a mixed solution composed of 70ml water and 7ml ethanolamine, stir and mix evenly, place the mixed solution in a hydrothermal reaction tank, Reacted at 160°C for 16 hours to obtain a yellow precipitate, which was filtered and washed three times with deionized water and ethanol respectively to obtain Zn 0.5 Cd 0.5 S nanorod photocatalyst.

[0052] 2) Add 0.5g Zn 0.5 Cd 0.5 S nanorods were ultrasonically dispersed in 100ml of distilled water, and then 53mg of nickel sulfate, 100mg of polyethylene glycol (molecular weight 2000), 0.2g of urea and 1ml of hydrazine hydrate were added. After stirring and mixing evenly, the solution was transferred to a 200mL reactor and reacted at 95°C for 12h. The product was separated by centrifugation and washed twice with deionized water and ethanol to obtain Zn0.5 Cd 0.5 S nanorod-metal nickel nano-heterojunction composite material, vacuum-drie...

Embodiment 2

[0055] 1) Dissolve 12mmol cadmium acetate, 8mmol zinc acetate, 0.6g urea and 50mmol cysteine ​​in a mixed solution composed of 75ml water and 4ml ethanolamine, stir and mix evenly, place the mixed solution in a hydrothermal reaction tank, and heat it at 180 ℃ for 6 hours, a yellow precipitate was obtained, which was filtered and washed three times with deionized water and ethanol respectively to obtain Zn 0.4 Cd 0.6 S nanorod photocatalyst.

[0056] 2) Add 1.0g Zn 0.4 Cd 0.6 S nanorods were ultrasonically dispersed in 100ml of distilled water, and then 100mg of nickel sulfate, 200mg of polyethylene glycol (molecular weight 2000), 0.2g of urea and 1.5ml of hydrazine hydrate were added. After stirring and mixing evenly, the solution was transferred to a 200mL reactor and reacted at 85°C for 12h. The product was separated by centrifugation and washed twice with deionized water and ethanol to obtain Zn 0.4 Cd 0.6 S nanorod-metal nickel nano-heterojunction composite material,...

Embodiment 3

[0059] 1) Dissolve 8mmol cadmium nitrate, 12mmol zinc nitrate, 1.0g urea and 40mmol cysteine ​​in a mixed solution composed of 70ml water and 7ml ethanolamine, stir and mix evenly, place the mixed solution in a hydrothermal reaction tank, and heat it at 170 ℃ for 8 hours, a yellow precipitate was obtained, which was filtered and washed three times with deionized water and ethanol respectively to obtain Zn 0.6 Cd 0.4 S nanorod photocatalyst.

[0060] 2) Add 1.0g Zn 0.6 Cd 0.4 S nanorods were ultrasonically dispersed in 100ml of distilled water, and then 300mg of nickel sulfate, 1.0g of polyethylene glycol (molecular weight 1000), 0.2g of urea and 10ml of hydrazine hydrate were added. After stirring and mixing evenly, the solution was transferred to a 200mL reactor and reacted at 100°C for 2h. The product was separated by centrifugation and washed twice with deionized water and ethanol to obtain Zn 0.6 Cd 0.4 S nanorod-metal nickel nano-heterojunction composite material, v...

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Abstract

The invention belongs to the technical field of photocatalytic hydrogen production, and particularly relates to a zinc cadmium sulfide nanorod and nickel nanorod heterojunction hydrogen production photocatalyst, a preparation method thereof, a hydrogen production system and a hydrogen production method. The method comprises the following steps: 1) mixing a zinc salt, a cadmium salt, ethanolamine, cysteine and a urea aqueous solution at room temperature, then carrying out a hydrothermal reaction, and separating the obtained solid product to obtain a zinc cadmium sulfide nanorod; and 2) dispersing the zinc cadmium sulfide nanorod obtained in the step 1) in an aqueous solution of polyethylene glycol and nickel sulfate, then adding urea and hydrazine hydrate, and then carrying out hydrothermal reaction to obtain the zinc cadmium sulfide nanorod and metal nickel nanorod heterojunction hydrogen production photocatalyst. According to the scheme, the semiconductor photocatalyst and the hydrogen production promoter are organically combined into a heterojunction material, and the efficient hydrogen production photocatalyst is formed.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic hydrogen production, and in particular relates to a heterojunction photocatalyst for hydrogen production of zinc cadmium sulfide nanorods and nickel nanorods, a preparation method thereof, a hydrogen production system and a hydrogen production method. Background technique [0002] With the rapid development of social economy, the existing fossil energy is far from being able to meet the increasing energy demand of mankind. Hydrogen production by splitting water with sunlight is an effective way to solve this problem. Renewable hydrogen energy has excellent characteristics such as non-toxicity, zero emission after combustion, and high specific energy value, and is regarded as an ideal alternative energy source for the next generation. The principle of hydrogen production by photolysis of water is that light is irradiated on a semiconductor catalyst. When the light energy is greater than the...

Claims

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Application Information

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IPC IPC(8): B01J27/043B01J35/10B01J37/10C01B3/04
CPCB01J27/043B01J37/10C01B3/042B01J35/61B01J35/39Y02E60/36
Inventor 林志东王思煜付萍陈喆
Owner WUHAN INSTITUTE OF TECHNOLOGY
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