Synthetic method for preparing nano-cuprous oxide by 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 problem of high photogenerated electron-hole recombination rate, reduced photogenerated electron-hole recombination rate, and photocatalytic activity. It can achieve the effect of reducing the electron-hole recombination rate and improving the catalytic activity of visible light.

Inactive Publication Date: 2011-12-14
CHONGQING TECH & BUSINESS UNIV
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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 nano-cuprous oxide by nitrogen-doped cuprous oxide
  • Synthetic method for preparing nano-cuprous oxide by nitrogen-doped cuprous oxide
  • Synthetic method for preparing nano-cuprous oxide by nitrogen-doped cuprous oxide

Examples

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Embodiment 1

[0020] Example 1: 50ml of copper sulfate solution and 1ml of urea solution were stirred and mixed to obtain solution A; 15ml of ammonia solution with a concentration of 0.10 mol / L was added to solution A, and 5ml was added after stirring for 15 minutes, with a concentration of 1.5 mol / L After the solution changes from blue to light green, 2 ml of hydrazine hydrate with a concentration of 1.4 mol / L is added dropwise until the solution gradually changes from green to light green to obtain mixed solution B; after stirring the above solution B 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 24h to make it fully saturated with adsorption. Irradiated under the Lux fluorescent light source for 3.5 hours, took samples every half an hour, centrifuged, and took the supernatant to meas...

Embodiment 2

[0022] Embodiment 2: 50ml of copper sulfate solution and 1.5ml of urea solution are stirred and mixed to obtain A solution; 3ml of aqueous ammonia solution with a concentration of 0.15 mol / L is added in the A solution, and 10ml is added with a concentration of 0.8 mol / L after stirring for 30min. L sodium hydroxide solution, after the solution changes from blue to light green, add 7 ml of hydrazine hydrate with a concentration of 0.7 mol / L dropwise until the solution gradually changes from green to light green to obtain mixed solution B; stir the above solution B for 2h Then, the solution is suction filtered, 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 24h to make it fully saturated with adsorption. Irradiated under the Lux fluorescent light source for 3.5 hours, took samples every half an hour, centrifuged, and t...

Embodiment 3

[0024] Embodiment 3: 50ml of copper sulfate solution and 3.5ml of urea solution are stirred and mixed to obtain A solution; 10ml of ammonia solution with a concentration of 0.15mol / L is added to the A solution, and 7ml is added with a concentration of 1mol / L after stirring for 15min. After the solution changes from blue to light green, 3 ml of hydrazine hydrate with a concentration of 1 mol / L is added dropwise until the solution gradually changes from green to light green to obtain mixed solution B; after stirring the above solution B for 3 hours, 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 24h to make it fully saturated with adsorption. Irradiated under the Lux fluorescent light source for 3.5 hours, took samples every half an hour, centrifuged, and took the supernatant to measu...

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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 method for synthesizing a new material in the field of environmental protection catalysis and its application in the field of environmental protection, in particular to a method for synthesizing 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. The n-type semiconductors represented by TiO2 have a wider band gap, absorb light in the ultraviolet region, and have a low utilization rate of visible light. The ultraviolet light source is required for photocatalysis, which limits their application range. [0003] Due to its narrow band gap (2.02 eV), cuprous oxide can make full use of visible light in sunlight, and has become a hot spot in semiconductor photocatalysis research. ...

Claims

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Application Information

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Patent Type & Authority Applications(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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