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ZnS/rGO/CuS nano-photocatalyst and preparation method thereof

A nano-photocatalyst and nano-particle technology, applied in physical/chemical process catalysts, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as limiting hydrogen production efficiency, easy agglomeration, and small specific surface area of ​​cadmium sulfide

Active Publication Date: 2018-12-04
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cadmium sulfide has defects such as small specific surface area, low conductivity, easy agglomeration, and easy recombination of photogenerated charges, which limit its hydrogen production efficiency.

Method used

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  • ZnS/rGO/CuS nano-photocatalyst and preparation method thereof
  • ZnS/rGO/CuS nano-photocatalyst and preparation method thereof
  • ZnS/rGO/CuS nano-photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 1487.5 mg of zinc nitrate hexahydrate, 8210 mg of 2-methylimidazole, and 1.4 mg of graphene oxide in 25 ml of methanol solution to prepare a 0.2 mol / L GO-ZIF-8 solution, and then ultrasonically disperse for 5 min. The mixture was stirred at a stirring speed of 300 r / min at room temperature for 12 hours, and then centrifuged, and the supernatant was removed. The resulting product was GO-ZIF-8. Then add 225.39 mg of thioacetamide to GO-ZIF-8 and dissolve it in a mixed solution of 20 ml of absolute ethanol and 10 ml of deionized water to prepare a mixture of 0.075 mol / L GO-ZIF-8 and sulfur source Then disperse the solution ultrasonically for 5 minutes, and stir for 20 minutes at a stirring speed of 300r / min at room temperature. Put the above-mentioned mixture into a high temperature polytetrafluoroethylene reactor and react hydrothermally at 120 ℃ for 12 h. After natural cooling After centrifugal separation and drying in an oven at 50 ℃ for 6 h, the product obtained i...

Embodiment 2

[0025] Weigh 2974.9 mg of zinc nitrate hexahydrate, 8210 mg of 2-methylimidazole, and 3.5 mg of graphene oxide in 25 ml of methanol solution to prepare a 0.4 mol / L GO-ZIF-8 solution, and then ultrasonically disperse for 10 min. The mixture was stirred at a stirring speed of 600 r / min at room temperature for 24 hours, and then centrifuged, the supernatant was removed, and washed with absolute ethanol and deionized water three times. The resulting product was GO-ZIF-8. Then add 225.39 mg of thioacetamide to GO-ZIF-8 and dissolve it in a mixed solution of 20 ml of absolute ethanol and 10 ml of deionized water to prepare a mixture of 0.15 mol / L of GO-ZIF-8 and sulfur source Then disperse the solution ultrasonically for 10 minutes and stir for 30 minutes at a stirring speed of 600 r / min at room temperature. Put the above solution into a polytetrafluoroethylene high-temperature reactor and react hydrothermally at 180 ℃ for 12 h. After natural cooling , Centrifugal separation, and dry...

Embodiment 3

[0029] Weigh 4462.35 mg zinc nitrate hexahydrate, 8210 mg 2-methylimidazole, and 14 mg graphene oxide in 25 ml methanol solution to prepare a 0.6 mol / L GO-ZIF-8 solution, and then ultrasonically disperse for 20 min. It was stirred for 10 h at a stirring speed of 800 r / min at room temperature, and then centrifuged, the supernatant was removed, and washed with absolute ethanol and deionized water for three times. The resulting product was GO-ZIF-8. Then add 225.39 mg of thioacetamide to GO-ZIF-8 and dissolve it in a mixed solution of 20 ml of absolute ethanol and 10 ml of deionized water to prepare a mixture of 0.225 mol / L of GO-ZIF-8 and sulfur source Then disperse the solution ultrasonically for 20 minutes and stir for 20 minutes at a stirring speed of 800 r / min at room temperature. Put the above solution into a high-temperature polytetrafluoroethylene reactor and react hydrothermally at 240 ℃ for 12 h. After natural cooling , Centrifugal separation, and drying in a 80 ℃ oven f...

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Abstract

Belonging to the technical field of nano-material preparation, the invention in particular relates to a ZnS / rGO / CuS nano-photocatalyst and a preparation method thereof. ZnS / CuS is a widely applied photocatalyst, the morphology of ZnS / CuS can be further regulated to increase the exposure number of active sites, thereby improving the photocatalytic activity of the photocatalyst. The zeolite imidazole framework material ZIF-8 has high specific surface area and abundant pore structures, and provides favorable conditions for construction of the photocatalyst. The preparation method of the materialincludes: firstly preparing graphene oxide (GO) loaded ZIF-8, and taking the product as the template to prepare the GO loaded ZnS porous nano-material ZnS / rGO, and finally introducing nano-CuS into the porous ZnS / rGO system to prepare the target product, i.e. ZnS / rGO / CuS nano-photocatalyst. The ZnS / rGO / CuS nano-photocatalyst provided by the invention has the advantages that: the ZnS prepared withZIF as the template has a super-large specific surface area, and provides more loading sites for CuS, thereby increasing the exposure number of active sites, and the introduction of graphene oxide cansignificantly improve the carrier conduction capacity, thereby significantly improving the photocatalytic activity of the photocatalyst.

Description

Technical field [0001] The invention belongs to the field of nano material preparation, and is specifically a ZnS / rGO / CuS nano photocatalyst and a preparation method thereof. Background technique [0002] For the continuation and stability of the development of human society, the development of new energy is urgent. The new energy to be developed should be a sustainable and permanent energy in nature, and should not add additional load to the global environment when applied, and its cost should not exceed that of currently used fossil fuels. Sustainable energy sources such as solar energy, wind energy, biological energy, nuclear energy, ocean energy, and hydrogen energy are all potential development targets. Among them, hydrogen energy is called the ultimate energy source for human beings, because hydrogen constitutes three-quarters of the mass of the universe and is the most widely distributed substance in the universe. As an energy source, hydrogen has many advantages: high c...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J35/10C01B3/04
CPCC01B3/042B01J27/04C01B2203/1076C01B2203/0277B01J35/39B01J35/61Y02E60/36
Inventor 刘福田徐美苓李魁周媛媛赵佳慧
Owner UNIV OF JINAN
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