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SnS2/g-C3N4 composite nanosheet photocatalyst and preparation method thereof

A photocatalyst, g-c3n4 technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve the effects of easy manipulation, simple preparation method, and low pollution

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

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Problems solved by technology

However, its own photon quantum efficiency still needs to be further improved.

Method used

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  • SnS2/g-C3N4 composite nanosheet photocatalyst and preparation method thereof
  • SnS2/g-C3N4 composite nanosheet photocatalyst and preparation method thereof
  • SnS2/g-C3N4 composite nanosheet photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Dissolve 0.125mmol tin tetrachloride pentahydrate and 1mmol thioacetamide in 20ml aqueous solution, and stir for 30 minutes. The dissolved solution was placed in a 25ml reaction kettle, and then the sealed reaction kettle was placed in an electric oven for hydrothermal reaction. The hydrothermal temperature was 160° C. for 12 hours. After the reaction, the reaction kettle was naturally cooled to room temperature, opened, and the obtained product was taken out and centrifuged to obtain a yellow precipitate, which was washed with deionized water and ethanol respectively, and then the product was vacuum-dried at 60°C for 8 hours to obtain SnS 2 nanosheet material. SnS 2 Transmission electron microscope images of the nanosheets as figure 1 shown. It can be clearly seen from the figure that the prepared SnS 2 The size of the nano sheet is 40-80nm, and the thickness is 8-15nm.

[0027]Weigh 10g of urea powder, grind and mix it evenly, put it into an alumina crucible, cov...

example 2

[0030] Dissolve 0.125mmol tin tetrachloride pentahydrate and 2mmol thioacetamide in 20ml aqueous solution, and stir for 30 minutes. The dissolved solution was placed in a 25ml reaction kettle, and then the sealed reaction kettle was placed in an electric oven for hydrothermal reaction. The hydrothermal temperature was 170° C. for 10 hours. After the reaction, the reaction kettle was naturally cooled to room temperature, opened, and the obtained product was taken out and centrifuged to obtain a yellow precipitate, which was washed with deionized water and ethanol respectively, and then the product was vacuum-dried at 60°C for 12 hours to obtain SnS2 nanometer sheet material.

[0031] Weigh 10g of urea powder, grind and mix it evenly, put it into an alumina crucible, cover it and put it into a muffle furnace, raise it to 580°C at a rate of 30°C / min in an air atmosphere, and keep it for 2.5 hours. After naturally cooling to room temperature, take it out and grind it finely to ob...

example 3

[0034] Dissolve 0.125mmol tin tetrachloride pentahydrate and 0.625mmol thioacetamide in 20ml aqueous solution, and stir for 30 minutes. The dissolved solution was placed in a 25ml reaction kettle, and then the sealed reaction kettle was placed in an electric oven for hydrothermal reaction. The hydrothermal temperature was 180° C. for 16 hours. After the reaction, the reaction kettle was naturally cooled to room temperature, opened, and the obtained product was taken out and centrifuged to obtain a yellow precipitate, which was washed with deionized water and ethanol respectively, and then the product was vacuum-dried at 60°C for 9 hours to obtain SnS 2 nanosheet material.

[0035] Weigh 10g of urea powder, grind and mix it evenly, put it into an alumina crucible, cover it and put it into a muffle furnace, raise it to 500°C at a rate of 15°C / min under a nitrogen atmosphere, and keep it for 3 hours. After naturally cooling to room temperature, take it out and grind it finely to...

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Abstract

The invention discloses a SnS2 / g-C3N4 composite nanosheet photocatalyst which is formed from two sheet layer materials, namely a SnS2 nanosheet and a g-C3N4 nanosheet. A preparation method of the composite nanosheet photocatalyst comprises the following main steps: putting tetrachlorostannane pentahydrate and a thioacetamide solution into a reaction kettle, performing hydrothermal reaction on the sealed reaction kettle in an electric dry oven, taking out a product, performing centrifugal separation to obtain a yellow precipitate, and washing and drying the product to obtain the SnS2 nanosheet; putting urea powder into a crucible, covering the crucible, and heating the covered crucible in a muffle furnace to obtain the yellow g-C3N4 nanosheet; and putting the SnS2 nanosheet and the g-C3N4 nanosheet into a methanol solution, ultrasonically treating in a water bath, magnetically stirring, removing methanol, putting into the reaction kettle, and heating the reaction kettle in the electric dry oven. The composite nanosheet photocatalyst can be used for effectively treating organic dye sewage; besides, the preparation method is simple and the cost is low.

Description

Technical field: [0001] The invention relates to a visible light catalyst and a preparation method. Background technique: [0002] With the rapid development of urban industry, the problem of water pollution caused by the arbitrary discharge of industrial wastewater is increasing, which seriously threatens people's living environment and health. The emergence of semiconductor photocatalysis technology provides a new green way to solve the problem of water pollution. Using sunlight as a natural energy source, semiconductor photocatalysts can effectively mineralize and degrade organic pollutants in sewage, reduce heavy metal ions in sewage, and kill bacteria in sewage. However, for TiO 2 , ZnO and other traditional semiconductor photocatalysts have a wide band gap and the absorption threshold wavelength is less than ~390nm, and can only use about 4% of the ultraviolet light in the solar energy, which greatly limits the photocatalysis of these photocatalysts. efficiency. Th...

Claims

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Application Information

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IPC IPC(8): B01J27/24
Inventor 张振翼董斌黄金斗苑青
Owner DALIAN NATIONALITIES UNIVERSITY
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