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A kind of non-stoichiometric copper bismuth acid nanomaterial and its preparation method and application

A non-stoichiometric, nano-material technology, applied in the field of non-stoichiometric copper bismuthate nano-materials and its preparation, can solve the problems of reaction time repeatability and efficiency limitation, and achieve low cost, good etching effect, good Dispersion and Uniformity Effects

Active Publication Date: 2019-12-06
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this protocol requires up to five days of reaction time and is limited by reproducibility and efficiency
So far, no literature or patent has reported the preparation of non-stoichiometric copper bismuthate materials under mild room temperature conditions

Method used

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  • A kind of non-stoichiometric copper bismuth acid nanomaterial and its preparation method and application
  • A kind of non-stoichiometric copper bismuth acid nanomaterial and its preparation method and application
  • A kind of non-stoichiometric copper bismuth acid nanomaterial and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of non-stoichiometric ratio copper bismuth acid nanometer material, its preparation method comprises the steps:

[0033] Mix 1mmol of bismuth nitrate pentahydrate with 20mL of copper acetate aqueous solution with a concentration of 5g / L, place the resulting reaction solution in a 100mL glass beaker, and disperse with ultrasonic stirring to obtain a uniform suspension, then add dropwise 5mol / L of potassium hydroxide solution 10mL until the solution was separated, and the obtained reaction system was aged for 24h (20°C). After the reaction, the obtained product was centrifuged to remove the residual solvent and dried at 60°C for 24h. After cooling, the non-stoichiometric ratio was obtained. Copper bismuth oxide nanomaterials.

[0034] Adopt Brukeraxs D8 type X-ray diffraction analyzer (XRD) to carry out X-ray diffraction analysis to the product obtained in this embodiment, the results are shown in figure 1 . As can be seen from the spectrum, the main peak of the ...

Embodiment 2

[0038] A kind of non-stoichiometric ratio copper bismuth acid nanometer material, its preparation method comprises the steps:

[0039] Mix 2mmol of bismuth nitrate pentahydrate with 20mL of 10g / L copper acetate aqueous solution, place the reaction solution in a 100mL glass beaker, and disperse with ultrasonic stirring to obtain a uniform suspension, then add dropwise 10mL of 10mol / L potassium hydroxide solution to the solution Layered, the obtained reaction system was left to stand for aging for 24h (20°C). After the reaction, the obtained product was centrifuged to remove the residual solvent and dried at 60°C for 24h. After cooling, the sea urchin-like non-stoichiometric bismuth acid was obtained. copper nanomaterials.

Embodiment 3

[0041] A kind of non-stoichiometric ratio copper bismuth acid nanometer material, its preparation method comprises the steps:

[0042] Mix 2mmol of bismuth nitrate pentahydrate with 20mL of copper acetate aqueous solution with a concentration of 5g / L, place the resulting reaction solution in a 100mL glass beaker, and disperse with ultrasonic stirring to obtain a uniform suspension, then add dropwise 0.5mol / L of potassium hydroxide Solution 10mL until the solution is separated, and the mixture is left to age for 12h (20°C); after the reaction, the product obtained is centrifuged to remove the residual solvent and dried at 60°C for 24h, and the sea urchin-like non-stoichiometric bismuth acid is obtained after cooling copper nanomaterials.

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Abstract

The invention discloses a non-stoichiometric copper bismuthate nanomaterial and its preparation and application. The non-stoichiometric copper bismuthate nanomaterial has a uniform sea urchin-like morphology and an average particle size of 2-3 μm. The composite material adopts a green and efficient room temperature aging method to successfully synthesize stable non-stoichiometric materials while obtaining a sea urchin-like morphology. Due to its special spectral absorption range, this material not only promotes the capture of visible light, but also achieves efficient utilization of photogenerated carriers, thereby improving the photocatalytic activity in the visible light range. The sea urchin-like non-stoichiometric copper bismuthate nanomaterial of the present invention exhibits extremely high activated persulfate photocatalytic degradation performance under visible light irradiation conditions, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of functional composite materials and their preparation, and in particular relates to non-stoichiometric ratio copper bismuth acid nanomaterials and their preparation methods and applications. Background technique [0002] Since Honda and Fujishima have reported that TiO 2 Since the use of photoelectrodes to split water to produce hydrogen under ultraviolet light irradiation, researchers have conducted extensive research on the use of semiconductor catalysts for water splitting. After more than 40 years of research, many highly efficient photocatalysts can decompose water into H under ultraviolet light (wavelength <420nm). 2 and O 2 . However, the efficiency of photolysis of water under visible light conditions is very low, while in the solar spectrum, ultraviolet light only accounts for about 4%, and visible light accounts for as much as 46%. Therefore, it is of great theoretical and practical signif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/843B01J35/02B01J35/10B01J35/00
CPCB01J23/8437B01J35/40B01J35/613B01J35/39
Inventor 陈嵘唐晗赵慧平杨浩
Owner WUHAN INSTITUTE OF TECHNOLOGY
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