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Synthetic method for preparing nanometer cuprous oxide from nitrogen-doped cuprous oxide

A nano-cuprous oxide and cuprous oxide technology, applied in the direction of copper oxide/copper hydroxide, nanotechnology, etc., can solve the problems of reducing photogenerated electron-hole recombination rate, high photogenerated electron-hole recombination rate, and constraints , to achieve the effect of improving the visible light catalytic activity and reducing the electron-hole recombination rate

Inactive Publication Date: 2013-03-13
CHONGQING TECH & BUSINESS UNIV
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AI Technical Summary

Problems solved by technology

However, the high photogenerated electron-hole recombination rate due to the narrow band gap of cuprous oxide leads to low photocatalytic activity.
Therefore, how to reduce the photogenerated electron-hole recombination rate and improve the photocatalytic activity has always been the bottleneck restricting its development.

Method used

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  • Synthetic method for preparing nanometer cuprous oxide from nitrogen-doped cuprous oxide
  • Synthetic method for preparing nanometer cuprous oxide from nitrogen-doped cuprous oxide
  • Synthetic method for preparing nanometer cuprous oxide from nitrogen-doped cuprous oxide

Examples

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Effect test

Embodiment 1

[0020] Example 1: Mix 50ml of copper sulfate solution and 1ml of urea solution to obtain A solution; add 15ml of ammonia solution with a concentration of 0.10 mol / L to the A solution, stir for 15 minutes, and then add 5ml of 1.5 mol / L After the solution changes from blue to light green, add 2ml of hydrazine hydrate with a concentration of 1.4mol / L dropwise until the solution gradually changes from green to light green to obtain mixed solution B; after stirring the above B solution for 5h , the solution is suction filtered, and the filter cake is vacuum-dried to obtain nitrogen-doped nano-cuprous oxide.

[0021] Add 0.05g of nitrogen-doped nano-cuprous oxide to 50ml of methylene blue solution (50mg / L), and place it in the dark for 24 hours to fully reach adsorption saturation. Lux (Lux) under the fluorescent light source for 3.5h, sampling every half hour, centrifuged, take the supernatant to measure the absorbance value, the degradation rate is 50%.

Embodiment 2

[0022] Example 2: 50ml of copper sulfate solution and 1.5ml of urea solution were stirred and mixed uniformly to obtain solution A; 3ml of ammonia solution with a concentration of 0.15 mol / L was added to solution A, and after stirring for 30min, 10ml of ammonia solution with a concentration of 0.8 mol / L was added. L of sodium hydroxide solution, after the solution changes from blue to light green, add 7ml of hydrazine hydrate with a concentration of 0.7mol / L dropwise until the solution gradually changes from green to light green to obtain mixed solution B; stir the above B solution for 2h Finally, the solution is filtered with suction, and the filter cake is vacuum-dried to obtain nitrogen-doped nano-cuprous oxide.

[0023] Add 0.05g of nitrogen-doped nano-cuprous oxide to 50ml of methylene blue solution (50mg / L), and place it in the dark for 24 hours to fully reach adsorption saturation. Lux (Lux) under the fluorescent light source for 3.5h, sampling every half hour, centrifu...

Embodiment 3

[0024] Example three: 50ml of copper sulfate solution and 3.5ml of urea solution were stirred and mixed uniformly to obtain solution A; 10ml of ammonia solution with a concentration of 0.15mol / L was added to solution A, and after stirring for 15min, 7ml with a concentration of 1mol / L was added After the solution changes from blue to light green, add 3ml of hydrazine hydrate with a concentration of 1mol / L dropwise until the solution gradually changes from green to light green to obtain mixed solution B; after stirring the above B solution for 3h, The solution is suction filtered, and the filter cake is vacuum-dried to obtain nitrogen-doped nano-cuprous oxide.

[0025] Add 0.05g of nitrogen-doped nano-cuprous oxide to 50ml of methylene blue solution (50mg / L), and place it in the dark for 24 hours to fully reach adsorption saturation. Lux (Lux) under the fluorescent light source for 3.5h, sampling every half hour, centrifuged, take the supernatant to measure the absorbance value,...

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Abstract

The invention discloses a synthetic method for preparing nanometer cuprous oxide from nitrogen-doped cuprous oxide. The synthetic method comprises the following steps: a, preparing a copper sulfate solution and a urea solution; b, obtaining a solution A by uniformly mixing the copper sulfate solution obtained in step a with the urea solution obtained in step a according to a molar ratio of N:Cu of 0.002-0.04; c, adding an aqueous solution of ammonia to the solution A, fully stirring, adding a sodium hydroxide solution, adding hydrazine hydrate after that the color of the solution changes intoreseda from blue, and obtaining a solution B when the color of the solution changes into reseda from green; and d, stirring the solution B, carrying out pumping filtration on the solution B, and obtaining a finished product the nanometer cuprous oxide prepared from nitrogen-doped cuprous oxide by carrying out vacuum drying on a filter cake. The nanometer cuprous oxide is prepared with the synthetic method for preparing nanometer cuprous oxide from nitrogen-doped cuprous oxide of the invention, so the electron-hole recombination rate is substantially reduced, and the visible photocatalytic activity of the nanometer cuprous oxide is effectively improved.

Description

technical field [0001] The invention relates to a synthesis method of a new material in the field of environmental protection catalysis and its application in the field of environmental protection, in particular to a synthesis method for preparing nano cuprous oxide by doping cuprous oxide with nitrogen ions. Background technique [0002] Photocatalytic oxidation technology has attracted more and more attention due to its mild reaction conditions, low energy consumption, high degradation efficiency, and non-selective degradation. Research hotspots. N-type semiconductors represented by TiO2 have a wide band gap, light absorption in the ultraviolet region, and low utilization of visible light. UV light sources are required for photocatalysis, which limits their application range. [0003] Due to its narrow bandgap (2.02eV), cuprous oxide can make full use of the visible light in sunlight, and has become a hotspot in the research of semiconductor photocatalysis. However, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G3/02B82Y40/00
Inventor 傅敏刘静王瑞琪董帆路媛媛卢鹏刘铎
Owner CHONGQING TECH & BUSINESS UNIV
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