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Preparation method of Au/Ag co-modified Sn3O4 nano composite photocatalytic material

A photocatalytic material and nanocomposite technology, applied in the field of preparation of nanocomposite photocatalytic materials, can solve the problems of obvious hard agglomeration effect of samples, demanding reaction conditions, easy falling off of supported metals, etc., and achieve excellent photocatalytic performance and morphology. Controllable, narrow particle size distribution effect

Inactive Publication Date: 2019-01-01
PINGDINGSHAN UNIVERSITY
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  • Abstract
  • Description
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Problems solved by technology

[0007] The above preparation methods all have their unique advantages, but most of the disadvantages lie in the complicated preparation process, harsh reaction conditions, obvious hard agglomeration effect of the sample, easy falling off of the loaded metal, etc.

Method used

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  • Preparation method of Au/Ag co-modified Sn3O4 nano composite photocatalytic material

Examples

Experimental program
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Effect test

Embodiment 1

[0028] 1) get 1mmol analytically pure stannous methanesulfonate (CH 3 SO 3 ) 2 Sn) and 0.5mmol of methanesulfonic acid (CH 4 o 3 S) fully dissolved in 3mL of absolute ethanol, and then sequentially added 0.5mmol of dodecyl ethoxy sulfobetaine and 13mL of deionized water to completely dissolve to obtain solution A;

[0029] 2) Take 1mmol analytically pure auric acid chloride (HAuCl 4 ), 1mmol of silver nitrate (AgNO 3 ) and 0.03mmol of methanesulfonic acid (CH 4 o 3 S) fully dissolved in 5mL of deionized water and mixed uniformly to obtain solution B;

[0030] Wherein steps 1 and 2) use a constant temperature magnetic stirring device to continuously magnetically stir it at 0° C. under an ice bath condition of crushed ice and water;

[0031] 3) Add solution B dropwise to solution A at a rate of 30 drops / min, then adjust its pH value to 4 with a NaOH solution with a concentration of 2mol / L, and use a constant temperature in an ice bath of crushed ice and water during the ...

Embodiment 2

[0035] 1) get 1mmol analytically pure stannous methanesulfonate (CH 3 SO 3 ) 2 Sn) and 2mmol of methanesulfonic acid (CH 4 o 3 S) fully dissolve in 12mL of absolute ethanol, then add 2.5mmol of dodecyl ethoxy sulfobetaine and 18mL of deionized water to dissolve completely to obtain solution A;

[0036] 2) Take 1mmol analytically pure auric acid chloride (HAuCl 4 ), 4mmol of silver nitrate (AgNO 3 ) and 3mmol of methanesulfonic acid (CH 4 o 3 S) Fully dissolved in 12mL of deionized water and mixed uniformly to obtain solution B;

[0037] Wherein steps 1 and 2) use a constant temperature magnetic stirring device to continuously magnetically stir it at 20° C. under an ice bath condition of crushed ice and water;

[0038] 3) Add solution B dropwise to solution A at a rate of 50 drops / min, then adjust its pH value to 7.5 with a NaOH solution with a concentration of 7mol / L, and use a constant temperature in the ice bath of crushed ice and water during the whole process A ma...

Embodiment 3

[0043] 1) get 1mmol analytically pure stannous methanesulfonate (CH 3 SO 3 ) 2 Sn) and 2.6mmol of methanesulfonic acid (CH 4 o 3 S) fully dissolved in 18mL of absolute ethanol, and then sequentially added 6mmol of dodecyl ethoxy sulfobetaine and 23mL of deionized water to completely dissolve to obtain solution A;

[0044] 2) Take 1mmol analytically pure auric acid chloride (HAuCl 4 ), 9mmol of silver nitrate (AgNO 3 ) and 5mmol of methanesulfonic acid (CH 4 o 3 S) Fully dissolved in 18mL of deionized water and mixed uniformly to obtain solution B;

[0045] Wherein steps 1 and 2) use a constant temperature magnetic stirring device to continuously magnetically stir it at 40° C. under an ice bath condition of crushed ice and water;

[0046] 3) Add solution B dropwise to solution A at a rate of 60 drops / min, then adjust its pH value to 9 with a NaOH solution with a concentration of 9mol / L, and use a constant temperature in an ice bath of crushed ice and water during the wh...

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Abstract

The invention discloses a preparation method of an Au / Ag co-modified Sn3O4 nano composite photocatalytic material. The nano composite material is an Au / Ag co-modified Sn3O4 nano composite material which is obtained through forming chemical bonds among the composite ingredients of the nano composite material to complex by using a wet chemistry in-situ synthesis method, in which ice baths are combined with solvent heat, in the solvent, surface active agent and reducing agent of chloroauric acid, silver nitrate and a tin source material. The composite material prepared by the invention utilizes the plasma resonance effect of Au / Ag binary metal nanoparticles, the oxygen vacancy defect effect of a Sn3O4 material and the excellent electron conduction of Au / Ag metal nanoparticles to realize rapidelectron-hole separation in the process of reducing and degrading pollutants through photocatalytic oxidation to collaborate with photocatalytic decomposition of water to generate hydrogen, thereby improving the efficiency of the photocatalytic decomposition of the water and the photocatalytic decomposition of Rhodamine B.

Description

technical field [0001] The invention relates to a preparation method of a nanocomposite photocatalytic material, in particular to an Au / Ag co-modified Sn 3 o 4 Preparation method of nanocomposite photocatalytic material. Background technique [0002] Energy shortage and environmental pollution are major problems facing mankind at present, and semiconductor photocatalysis technology is one of the effective ways to solve the above problems. However, traditional photocatalytic materials (such as TiO 2 , ZnO, SnO 2 etc.) are all wide-bandgap semiconductors, which only have the ability to respond to ultraviolet light, which greatly limits their photocatalytic performance under sunlight irradiation. This limits the large-scale application of photocatalytic technology. Therefore, the research and development of photocatalytic materials with visible light response and high quantum efficiency is an urgent problem to be solved in the field of photocatalysis research. Metal-suppo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/66B01J35/02C01B3/04B01J35/00
CPCC01B3/042B01J23/66B01J35/393B01J35/39B01J35/40Y02E60/36
Inventor 杨柳青曹可生白青程国斌侯延民赵干卿
Owner PINGDINGSHAN UNIVERSITY
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