Preparation method of Au modified SnO/Sn3O4/SnO2 nano composite photocatalytic material

A photocatalytic material and nanocomposite technology, applied in the field of preparation of nanocomposite photocatalyst, can solve the problems of complex preparation process, unreliable loading, obvious hard agglomeration effect, etc., and achieve low preparation temperature, controllable shape and size, The effect of fast photogenerated carrier separation

Inactive Publication Date: 2018-12-28
PINGDINGSHAN UNIVERSITY
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  • Abstract
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Problems solved by technology

These preparation methods have their unique advantages, but most of the disadvantages lie in the complicated preparation process, two-step reaction, obvious hard agglomeration effect and unreliable loading, etc.

Method used

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  • Preparation method of Au modified SnO/Sn3O4/SnO2 nano composite photocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) get 1mmol analytically pure stannous acetate (C 4 h 6 O4Sn) and 0.8mmol of acetic acid (CH 3 COOH) was fully dissolved in 2 mL of absolute ethanol, and then 0.5 mmol of ascorbyl palmitate (C 22 h 38 o 7 ) and 13mL of deionized water to obtain solution A;

[0028] 2) Take 1mmol analytically pure auric acid chloride (HAuCl 4 ) and 0.01 mmol analytically pure acetic acid (CH 3 COOH) was fully dissolved in 7mL of deionized water to obtain solution B;

[0029] The steps 1 and 2) in the whole process, use a constant temperature magnetic stirring device to carry out continuous magnetic stirring at a temperature of 5° C. in an ice-water bath composed of crushed ice and water;

[0030] 3) Add solution B dropwise to solution A at a speed of 30 drops / min to form a mixed solution, then adjust the pH value of the mixed solution to 5 with a NaOH solution with a concentration of 2mol / L, and the whole process is formed in a mixture of crushed ice and water. Use a constant te...

Embodiment 2

[0034] 1) get 1mmol analytically pure stannous acetate (C 4 h 6 O4Sn) and 1.2mmol of acetic acid (CH 3 COOH) was fully dissolved in 7mL of absolute ethanol, and then 5mmol of ascorbyl palmitate (C 22 h 38 o 7 ) and 18mL of deionized water to obtain solution A;

[0035] 2) Take 1mmol analytically pure auric acid chloride (HAuCl 4 ) and 0.5 mmol analytically pure acetic acid (CH 3 COOH) was fully dissolved in 12mL of deionized water to obtain solution B;

[0036] The steps 1 and 2) in the ice-water bath composed of crushed ice and water use a constant temperature magnetic stirring device to carry out continuous magnetic stirring at a temperature of 30°C;

[0037] 3) Add solution B dropwise to solution A at a rate of 45 drops / min to form a mixed solution, then use a NaOH solution with a concentration of 3mol / L to adjust the pH value of the mixed solution to 6. Use a constant temperature magnetic stirring device in an ice-water bath to continuously magnetically stir it at ...

Embodiment 3

[0042] 1) get 1mmol analytically pure stannous acetate (C 4 h 6 O4Sn) and 1.6mmol of acetic acid (CH 3 COOH) was fully dissolved in 12mL of absolute ethanol, and then 9mmol of ascorbyl palmitate (C 22 h 38 o 7 ) and 23mL of deionized water to obtain solution A;

[0043] 2) Take 1mmol analytically pure auric acid chloride (HAuCl 4 ) and 1.0 mmol analytically pure acetic acid (CH 3 COOH) was fully dissolved in 15mL of deionized water to obtain solution B;

[0044] The steps 1 and 2) in the whole process, use a constant temperature magnetic stirring device to carry out continuous magnetic stirring at a temperature of 50° C. in an ice-water bath composed of crushed ice and water;

[0045] 3) Add solution B dropwise to solution A at a rate of 60 drops / min to form a mixed solution, then use a NaOH solution with a concentration of 5mol / L to adjust the pH value of the mixed solution to 8. Use a constant temperature magnetic stirring device in an ice-water bath to continuously ...

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Abstract

The invention relates to a preparation method of an Au modified SnO/Sn3O4/SnO2 nano composite photocatalytic material. The nano composite material is obtained by placing chloroauric acid and a tin source into a solvent, a surfactant and a reducing agent and forming chemical bond complexing among composite ingredients of the materials according to an ice salt bath and solvent combined hot wet chemical in-situ synthesis method. The composite material prepared by the invention utilizes a plasma resonance effect of Au metal nanoparticles, an excellent energy level matching heterojunction structureamong composite components of a tin oxide material and excellent electron conduction of Au metal nanoparticles, and implements rapid electron-hole separation in the process of cooperating photocatalytic oxidation and reduction degradation of pollutants with photocatalytic water splitting hydrogen production, thereby improving efficiency of photocatalytic water splitting and photocatalytic rhodamine B degradation of the Au modified SnO/Sn3O4/SnO2 nano composite photocatalytic material.

Description

technical field [0001] The invention relates to a preparation method of a nanocomposite photocatalyst, in particular to an Au-modified SnO / Sn 3 o 4 / SnO 2 Preparation method of nanocomposite photocatalytic material. Background technique [0002] At present, research on photocatalyst materials mainly focuses on semiconductor oxides (TiO 2 , ZnO, SnO 2 and BiOCl, etc.), and their complexes. Among them, tin oxide, as an important n-type semiconductor, is widely used to degrade organic dyes such as orange G, Brill blue, alizarin red S, methylene blue, and rhodamine B. But the monovalent SnO 2 As a photocatalytic material, its large band gap (about 3.6eV) and high recombination rate of photogenerated electron-hole pairs restrict its absorption and utilization of visible light, and cannot obtain high-efficiency photocatalytic performance. The bandgap width of mixed valence tin oxide is wider than that of monovalent SnO 2 The bandgap width is smaller, thus showing more exce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/66B01J35/02C01B3/04
CPCB01J23/66B01J35/004B01J35/023C01B3/042C01B2203/1041C01B2203/1088Y02E60/36
Inventor 杨柳青高航白青韩永军李松田
Owner PINGDINGSHAN UNIVERSITY
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