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Cuprous ion-doped zinc sulfide copper nanowire visible-light-driven photocatalyst as well as preparation method and application thereof

A technology of cuprous ion and zinc copper sulfide, which is applied in the direction of physical/chemical process catalysts, nanotechnology for materials and surface science, nanotechnology, etc., to achieve the effects of convenient operation, cost reduction, and simple preparation process

Inactive Publication Date: 2014-07-23
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of the intrinsic band gap of titanium dioxide and zinc sulfide, it can only be excited by ultraviolet light.

Method used

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  • Cuprous ion-doped zinc sulfide copper nanowire visible-light-driven photocatalyst as well as preparation method and application thereof
  • Cuprous ion-doped zinc sulfide copper nanowire visible-light-driven photocatalyst as well as preparation method and application thereof
  • Cuprous ion-doped zinc sulfide copper nanowire visible-light-driven photocatalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The cationic surfactant cetyltrimethylammonium bromide (CTAB) and the organic amine solvent hexadecylamine (HDA) were completely dissolved at 180°C to obtain solution A; copper acetylacetonate was used as the copper source to completely dissolve Dissolve in solution A and stir for 3 to 5 minutes to obtain dark green solution B. Add a silicon chip coated with noble metal platinum as a catalyst in solution B, put it in a hydrothermal kettle, react at 180°C for 12 hours, and cool to room temperature, washed 3 to 5 times, and the obtained solid was vacuum-dried at 80° C. for 2 hours to obtain linear copper nanowires.

[0025] Take 2mmol of copper nanowires and 20mL of water in a 50mL beaker, ultrasonically disperse, add 5mmol of zinc acetate and 14mmol of thiourea, and stir evenly. Transfer to microwave reactor. The heating time is 10min, the microwave power is 1200w, the initial pressure is 35bar, the reaction temperature is 150°C, and the reaction time is 30min, after co...

Embodiment 2、3、4

[0031] The only difference from Example 1 is that the amount of copper nanowires used is different. Examples 2, 3, and 4 are 1mmol, 3mmol, and 5mmol respectively. The obtained products have the same phase composition, similar microscopic appearance, and certain differences in specific surface area. Among them, 2mmol addition has the highest hydrogen production activity.

Embodiment 5、6、7、8、9

[0033] The only difference from Example 1 is that the zinc source used is different. Embodiments 5, 6, 7, 8, and 9 are respectively zinc nitrate, zinc chloride, zinc sulfate, zinc acetylacetonate, and zinc dihydrogen phosphate. The composition is the same, but there are differences in specific surface area and hydrogen production activity. Among them, the sample with zinc acetate as the zinc source has the highest hydrogen production activity.

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Abstract

The invention discloses a rapid synthesis method and applications of a cuprous ion-doped zinc sulfide copper nanowire visible-light-driven photocatalyst. The cuprous ion-doped zinc sulfide copper nanowire visible-light-driven photocatalyst with high visible-light activity is rapidly synthesized through sulfuration of a sulfur source and cleaning by the pressure microwave-assisted synthesis method with water as a solvent, bivalent zinc salt as a zinc source and copper nanowires as a substrate. The catalyst disclosed by the invention has the advantages that the preparation method is simple and environmental pollution is not produced in the preparation process; a zinc sulfide energy band structure is changed through the doping of cuprous ions, so that the photoresponse of the catalyst is expanded to a visible region; the separating efficiency of electron-hole pairs is increased through the electron conduction capacity of the copper nanowires, so that the quantum efficiency of similar materials is greatly increased in the absence of noble metal; the catalyst can be widely applied to the fields of water-photolysis hydrogen production, solar cells, antibiosis, photocatalytic treatment of pollutants and the like.

Description

technical field [0001] The invention relates to the technical field of photocatalysts, in particular to a cuprous ion-doped zinc-copper sulfide nanowire visible light catalyst and a preparation method and application thereof. Background technique [0002] Environmental and energy issues are one of the most important challenges facing the world at present, and solving this problem is of great significance for my country to implement sustainable development and build a harmonious society. Photocatalytic technology is an emerging technology developed in the past ten years. Its main application fields are degradation of organic pollutants, preparation of hydrogen energy, and oxidation of nitrogen oxides in the air. It has the advantages of mild reaction conditions, low energy consumption, and less secondary pollution, and has very important application prospects in terms of environment and energy. Among various photocatalysts, titanium dioxide is the most widely studied. Anata...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B82Y30/00B82Y40/00C01B3/04
CPCY02E60/36Y02P20/133
Inventor 张蝶青肖舒宁朱巍刘佩珏章姗姗温美成李和兴
Owner SHANGHAI NORMAL UNIVERSITY
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