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Method for preparing photocatalytic material with graphene-covered cadmium sulfide nuclear shell structure

A photocatalytic material, graphene-wrapped technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as reducing photocatalytic efficiency, limiting application, instability, etc., to achieve high photocatalysis The effect of reaction efficiency, uniform size and regular morphology

Inactive Publication Date: 2014-05-07
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its photocorrosion and instability, the cadmium sulfide photocatalyst is easy to decompose during the photocatalytic reaction, which reduces its photocatalytic efficiency and limits its application.

Method used

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  • Method for preparing photocatalytic material with graphene-covered cadmium sulfide nuclear shell structure
  • Method for preparing photocatalytic material with graphene-covered cadmium sulfide nuclear shell structure
  • Method for preparing photocatalytic material with graphene-covered cadmium sulfide nuclear shell structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 0.006mol of cadmium chloride (CdCl 2 ) was dissolved in 40mL of distilled water, and 0.006mol of sodium thiosulfate (Na 2 S 2 o 3 ), continue to stir for 30min. Then this mixed solution is filled in the liner of 70mL polytetrafluoroethylene, and the filling amount is 60% of the volume of the liner of polytetrafluoroethylene. Put the bushing into a stainless steel kettle, and put the hydrothermal kettle into an oven for hydrothermal reaction at 120°C for 12 hours. After the reaction was completed, the reactor was taken out and cooled naturally. A bright yellow precipitate appeared in the bushing of the reactor. The yellow precipitate was filtered and washed three times with distilled water and absolute ethanol. The obtained product was dried in an oven at 80° C. for 3 hours to obtain cadmium sulfide microspheres. Take 0.1 g of pre-prepared graphene oxide and ultrasonically disperse it in 400 mL of deionized water to form a graphene oxide suspension, then add 1 g of ...

Embodiment 2

[0031] 0.006mol of cadmium chloride (CdCl 2 ) was dissolved in 40mL of distilled water, and 0.006mol of sodium thiosulfate (Na 2 S 2 o 3 ), continue to stir for 30min. Then this mixed solution is filled in the liner of 70mL polytetrafluoroethylene, and the filling amount is 60% of the volume of the liner of polytetrafluoroethylene. Put this bushing into a stainless steel kettle, and put the hydrothermal kettle into an oven for hydrothermal reaction at 160°C for 24 hours. After the reaction was completed, the reactor was taken out and cooled naturally. A bright yellow precipitate appeared in the bushing of the reactor. The yellow precipitate was filtered and washed three times with distilled water and absolute ethanol. The obtained product was dried in an oven at 80° C. for 3 hours to obtain cadmium sulfide microspheres. Take 0.25 g of pre-prepared graphene oxide and ultrasonically disperse it in 400 mL of deionized water to form a graphene oxide suspension, then add 1 g o...

Embodiment 3

[0033] 0.012mol of cadmium chloride (CdCl 2 ) was dissolved in 40mL of distilled water, and 0.012mol of sodium thiosulfate (Na 2 S 2 o 3 ), continue to stir for 30min. Then this mixed solution is filled in the liner of 70mL polytetrafluoroethylene, and the filling amount is 60% of the volume of the liner of polytetrafluoroethylene. Put this bushing into a stainless steel kettle, and put the hydrothermal kettle into an oven for hydrothermal reaction at 140°C for 12 hours. After the reaction was completed, the reactor was taken out and cooled naturally. A bright yellow precipitate appeared in the bushing of the reactor. The yellow precipitate was filtered and washed three times with distilled water and absolute ethanol. The obtained product was dried in an oven at 80° C. for 3 hours to obtain cadmium sulfide microspheres. Take 0.5 g of pre-prepared graphene oxide and ultrasonically disperse it in 400 mL of deionized water to form a graphene oxide suspension, then add 1 g of...

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Abstract

The invention discloses a method for preparing a photocatalytic material with a graphene-covered cadmium sulfide nuclear shell structure. The photocatalytic material with the nuclear shell structure is high in monodispersity and controllable in particle size; furthermore, the photocatalytic material is extremely high in photocatalytic degradation efficiency to a simulated organic pollutant rhodamine B in a water body. A cadmium sulfide microsphere is prepared by a hydrothermal technology, and then the surface of the cadmium sulfide microsphere is coated with a layer of graphene, so that the nitrogen- and cerium-doped titanium dioxide photocatalytic material is finally prepared. The photocatalytic material with the graphene-covered cadmium sulfide nuclear shell structure, which is prepared by the method disclosed by the invention, is high in monodispersity; furthermore, the size of the product can be controlled according to a reaction condition, and the specific area is large; the photocatalytic material is higher in photocatalytic reaction efficiency and has a wide application prospect. The preparation method and the technology are simple and environment-friendly; the raw materials and equipment are cheap and readily available and are low in cost; the synthesis time is short, and the efficiency is high; the method has an extremely wide industrial production prospect.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and relates to a preparation method of a core-shell structured photocatalytic material, in particular to a preparation method of a graphene-wrapped cadmium sulfide core-shell structured photocatalytic material. Background technique [0002] Cadmium sulfide (CdS) has been widely used in the field of photocatalytic degradation of organic pollutants due to its low band gap. However, due to its photocorrosion and instability, the cadmium sulfide photocatalyst is easy to decompose during the photocatalytic reaction, which reduces its photocatalytic efficiency and limits its application. In recent years, reports on cadmium sulfide-based composite photocatalytic materials mainly focus on the surface treatment and protection of cadmium sulfide with materials that do not undergo photocorrosion under the action of light, thereby greatly improving the photocorrosion resistance and sta...

Claims

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Application Information

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IPC IPC(8): B01J27/04
Inventor 刘辉吕婷朱振峰伍啸华
Owner SHAANXI UNIV OF SCI & TECH
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