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A method for preparing visible light catalyst powder and cloth from bismuth-rich materials

A photocatalyst and visible light technology, applied in the fields of material chemistry and photocatalysis, can solve the problems of difficulty in recycling and secondary pollution, and achieve the effects of uniform particle morphology and size, clean surface, and reaction temperature and pressure.

Active Publication Date: 2020-06-02
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, micro-nano-scale catalyst powders are directly dispersed in water bodies, resulting in difficulty in recycling and causing secondary pollution. How to prevent powder diffusion and realize the effective recycling of photocatalysts is also a problem worth thinking about.

Method used

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  • A method for preparing visible light catalyst powder and cloth from bismuth-rich materials
  • A method for preparing visible light catalyst powder and cloth from bismuth-rich materials
  • A method for preparing visible light catalyst powder and cloth from bismuth-rich materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method for preparing visible light catalyst powder and "cloth" from bismuth-rich materials is as follows: 10mmol bismuth chloride and 0.5mmol cobalt chloride are dissolved in 200mL edetate disodium aqueous solution (0.15mol / L), and 35mmol sodium diethyldithiocarbamate trihydrate was dissolved in 100mL of water, then added dropwise to the bismuth-rich solution, and a precipitate was gradually produced, after the addition was completed, filtered, then added with 300mL of water, filtered, washed and dried to obtain 5% cobalt doped bismuth diethyldithiocarbamate powder. Dissolve 200 mg of the prepared powder in 5 mL of N,N-dimethylformamide, add 500 mg of polyacrylonitrile, and apply a voltage of 15 kV for electrospinning to obtain 5% cobalt-doped bismuth diethyldithiocarbamate Catalytic "cloth".

[0038] Observe that this powder product is the box that surface has nanoporous structure with scanning electron microscope, and size is about 10 μ m (see figure 1 ); detected...

Embodiment 2

[0040] A method for preparing visible light catalyst powder and "cloth" from bismuth-rich materials is as follows: 10mmol bismuth neododecanoate, 0.5mmol nickel acetate and 0.5mmol manganese acetate are dissolved in 200mL ethanol (adjust the pH to less than 2 with hydrochloric acid), Dissolve 40mmol of ammonium diethyldithiocarbamate in 100mL of ethanol, then add it dropwise to the bismuth-rich solution, and gradually produce a precipitate. After the dropwise addition, filter, then add 300mL of water, filter, wash and dry to obtain 5% nickel 5% manganese doped bismuth diethyldithiocarbamate powder. Dissolve 200 mg of the prepared powder in 5 mL of chloroform, add 500 mg of polystyrene, and apply a voltage of 20 kV for electrospinning to obtain a 5% nickel 5% manganese-doped bismuth diethyldithiocarbamate photocatalyst "cloth". ".

Embodiment 3

[0042] A method for preparing visible light catalyst powder and "cloth" from bismuth-rich materials is as follows: 10mmol bismuth acetate, 0.3mmol ferrous chloride, 0.1mmol cupric chloride and 0.1mmol cerous chloride are dissolved in 200mL formamide ( Use sulfuric acid to adjust the pH to be less than 2), dissolve 35mmol diethylammonium diethyldithiocarbamate in 100mL formamide, then add dropwise in the rich bismuth solution, gradually produce precipitation, after the dropwise addition, filter, and then Add 300 mL of water, filter, wash and dry to obtain 3% iron 1% copper 1% cerium doped bismuth diethyldithiocarbamate powder. Dissolve 200 mg of the prepared powder in 5 mL of N,N-dimethylformamide, add 500 mg of polyvinylidene fluoride, and apply a voltage of 15 kV for electrospinning to obtain 3% iron, 1% copper, 1% cerium-doped diethyl diethylene difluoride Bismuth thiocarbamate photocatalytic "cloth".

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Abstract

A method for preparing visible light catalyst powder and cloth from bismuth-rich materials. Dissolve the bismuth-rich material and dithiocarbamate in a solvent respectively, add the dithiocarbamate solution dropwise into the bismuth-rich solution to produce a precipitate; filter, wash and dry to obtain metal element doping of bismuth dithiocarbamate. The prepared metal element-doped bismuth dithiocarbamate is dissolved in a good solvent, polymers are added, and electrospinning is performed to obtain a "cloth" with photocatalytic function. The metal element-doped bismuth dithiocarbamate prepared by the invention has uniform morphology and size, good dispersion, is green and environmentally friendly, stable in air, water and most solvents, resistant to acids and alkali, and has the potential for industrial mass production. It has excellent photocatalytic pollutant degradation activity, realizing the direct conversion and reuse of bismuth-rich materials, and the photocatalytic "cloth" can effectively prevent the diffusion of catalyst powder, achieving effective recycling of photocatalysts.

Description

technical field [0001] The invention belongs to the technical field of material chemistry and photocatalysis, and in particular relates to a method for preparing visible light catalyst powder and cloth from bismuth-rich materials. Background technique [0002] Due to the special properties of bismuth, and it is non-toxic and cheap, bismuth-based inorganic semiconductor photocatalytic materials, such as Bi 2 o 3 , BiOCl, BiOBr, BiOI, Bi 2 S 3 、BiPO 4 、BiVO 4 、 Bi 2 WO 6 、 Bi 2 MoO 6 etc., have received extensive attention due to their excellent visible-light photocatalytic activity. In recent years, some bismuth complex semiconductors, due to their low cost, easy synthesis, safety and environmental protection, and also have excellent photocatalytic activity, have great potential for practical photocatalytic pollutant degradation and water splitting for hydrogen and oxygen production, antibacterial, antibacterial, and antibacterial. Milling and other fields, the pros...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02C02F1/30
CPCC02F1/30B01J31/0245B01J31/0271C02F2305/10B01J35/61B01J35/39
Inventor 阙文修杨亚威杜亚平
Owner XI AN JIAOTONG UNIV
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