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Metal ion co-doped BiOBr microsphere as well as preparation method and application thereof

A metal ion and co-doping technology, applied in chemical instruments and methods, catalyst activation/preparation, water treatment of special compounds, etc., can solve problems such as limited effective reactions, achieve improved photocatalytic activity, promote reactions, and broaden visible light response range effect

Active Publication Date: 2020-09-22
YANAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a large amount of research work has been done on bismuth oxyhalide materials, solvothermal method, hydrothermal method, two-component method, and one-step synthesis are mostly used for the synthesis of bismuth oxyhalide materials, but these methods have limited effective reactions within a certain period of time and require Longer time to complete the growth process of the substance

Method used

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  • Metal ion co-doped BiOBr microsphere as well as preparation method and application thereof
  • Metal ion co-doped BiOBr microsphere as well as preparation method and application thereof
  • Metal ion co-doped BiOBr microsphere as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Bi(NO 3 ) 3 ·5H 2 O and CTAB were dissolved in 20ml of ethylene glycol (EG) at a molar ratio of 1:1 (4mmol), and sonicated for 15min. After 15 min of magnetic stirring, the above two solutions were mixed and stirred for 30 min to form a precursor solution, and then 2wt% Cd(NO 3 ) 2 4H 2 O (0.01542g) to obtain a mixed solution, then transfer the mixed solution to a microwave hydrothermal polytetrafluoroethylene lined autoclave, and add a bursting membrane, tighten the kettle body, and place it in a microwave hydrothermal reactor system , reacted at 180°C for 15min. After the reaction, the product was cooled to room temperature, washed several times with deionized water (DI), washed twice with ethanol, and dried at 60 °C for 12 h to synthesize Cd 2+ Doped BiOBr microspheres, named Bi 0.98 Cd 0.02 OBr. The Bi prepared in this example 0.98 Cd 0.02 SEM images of OBr at different magnifications are shown in figure 2 and image 3 .

Embodiment 2

[0044] Bi(NO 3 ) 3 ·5H 2 O and CTAB were dissolved in 20ml of ethylene glycol (EG) at a molar ratio of 1:1 (4mmol), and sonicated for 15min. After magnetic stirring for 15 min respectively, the above two solutions were mixed and stirred for 30 min to form a precursor solution, and then 2wt% Fe(NO 3 ) 3 9H 2 O (0.0202g), to obtain a mixed solution, then transfer the mixed solution to a microwave hydrothermal polytetrafluoroethylene lined autoclave, and add a bursting membrane, tighten the kettle body, and place it in a microwave hydrothermal reactor system , reacted at 180°C for 15min. After the reaction, the product was cooled to room temperature, washed several times with deionized water (DI), washed twice with ethanol, and dried at 60 °C for 12 h to synthesize Fe 3+ Doped BiOBr microspheres, named Bi 0.98 Fe 0.02 OBr. The Bi prepared in this example 0.98 Fe 0.02 The SEM images of OBr at different magnifications are shown in Figure 4 and Figure 5 .

Embodiment 3

[0046] Bi(NO 3 ) 3 ·5H 2 O and CTAB were dissolved in 20ml of ethylene glycol (EG) at a molar ratio of 1:1 (4mmol), and sonicated for 15min. After 15 min of magnetic stirring, the above two solutions were mixed and stirred for 30 min to form a precursor solution, and then 2wt% Cd(NO 3 ) 2 4H 2 O (0.01542g), to obtain a mixed solution, continue to add 2wt% Fe (NO 3 ) 3 9H 2 O (0.0202 g), the mixed solution was then transferred to a microwave hydrothermal Teflon-lined autoclave with a burst disk. It was placed in a microwave hydrothermal reactor system and reacted at 180° C. for 15 min. After the reaction, the product was cooled to room temperature, washed several times with deionized water (DI), washed twice with ethanol, and dried at 60°C for 12h. synthesized Cd 2+ / Fe 3+ Co-doped BiOBr microspheres, named Bi 0.96 Cd 0.02 Fe 0.02 OBr. The Bi prepared in this example0.96 Cd 0.02 Fe 0.02 The SEM images of OBr at different magnifications are shown in Figure 6 a...

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Abstract

The invention discloses a metal ion co-doped BiOBr microsphere as well as a preparation method and application thereof. The microsphere is specifically prepared from Bi < 1-x-y > Cd < x > Fe < y > OBr, wherein x = y = 0.02, or Bi<1-x> Cd<x>OBr, x = 0.02, or Bi<1-x> Fe<x>OBr, and x = 0.02, the preparation method comprises the following steps: respectively dissolving a bismuth source and CTAB in anorganic solvent, carrying out ultrasonic treatment, and carrying out magnetic stirring; mixing to obtain a mixed solution, adding metal ions, transferring an obtained product into a high-pressure kettle, adding a rupture disk, and carrying out microwave hydrothermal reaction; and after the reaction is finished, cooling a product to room temperature, washing with deionized water for multiple times,fully washing with ethanol, and drying. The preparation method disclosed by the invention is mild in condition and simple in process, and organic pollutants such as dyes and antibiotics in sewage canbe efficiently degraded under simulated sunlight irradiation.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a metal ion co-doped BiOBr microsphere, a preparation method and an application thereof. Background technique [0002] For decades, the effective treatment of polluted water bodies has become an urgent problem as the volume of polluted water has increased. Organic pollutants are one of the main pollutants. Although there are many treatment methods to solve this problem, there are certain limitations. The power source of the government's environmental requirements, as early as 1972, Honda and Fuji Island proposed that titanium dioxide using a single crystal electrode as a photocatalyst split water under ultraviolet irradiation. Since then, photocatalytic technology has become an effective solution for wastewater treatment due to its economical, efficient, and environmentally friendly characteristics. [0003] Some existing oxide semiconductor materials (such as TiO 2 , ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/128B01J27/138B01J35/00B01J35/08B01J37/10B01J37/34C02F1/30C02F101/30
CPCB01J37/10B01J37/346B01J27/138B01J27/128C02F1/30C02F2305/10C02F2101/308B01J35/51B01J35/39Y02W10/37
Inventor 张富春王魏戴蓉吴乔张磊门婧茹
Owner YANAN UNIV
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