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Bismuth ferrite nanosheet material as well as preparation method and application thereof

A technology of nanosheets and bismuth salts, applied in the field of environmental engineering, to achieve the effect of large particle size, small particle size, and large relative area

Pending Publication Date: 2022-06-24
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the preparation of a Bi with uniform particle size and high piezoelectric catalytic activity 2 Fe 4 o 9 Catalyst still faces challenges

Method used

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  • Bismuth ferrite nanosheet material as well as preparation method and application thereof
  • Bismuth ferrite nanosheet material as well as preparation method and application thereof
  • Bismuth ferrite nanosheet material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Analytically pure Bi(NO 3 ) 3 ·5H 2 O and FeCl 3 ·6H 2 O was dissolved in the ethylene glycol solution at a molar ratio of 1:1 and stirred well until completely dissolved. 200 mL of deionized water was added to the above solution, stirred, and then excess concentrated ammonia water was added dropwise to completely precipitate the solution. The supernatant was poured out, deionized water was added to the obtained precipitate, shaken, washed and centrifuged, and the above washing operation was repeated 2-3 times. 10 mol / L NaOH was added to the washed precipitate, stirred for 30 min to form a solution and put into a stainless steel autoclave with a polytetrafluoroethylene lining, and reacted in an oven at 180 °C for 72 h. After the reaction, turn off the power of the oven and let the autoclave naturally cool to room temperature in the oven. The final product of the reaction was washed 3-5 times with deionized water and absolute ethanol, and dried in an oven at 60 °C ...

Embodiment 2

[0027] Analytically pure Bi(NO 3 ) 3 ·5H 2 O and FeCl 3 ·6H 2O was dissolved in the ethylene glycol solution at a molar ratio of 1:1 and stirred well until completely dissolved. 200 mL of deionized water was added to the above solution, stirred, and then excess concentrated ammonia water was added dropwise to completely precipitate the solution. The supernatant was poured out, deionized water was added to the obtained precipitate, shaken, washed and centrifuged, and the above washing operation was repeated 2-3 times. 14mol / L NaOH was added to the washed precipitate, stirred for 30min to form a solution and put into a stainless steel autoclave with a polytetrafluoroethylene lining, and reacted in an oven at 180°C for 72h. After the reaction, turn off the power of the oven and let the autoclave naturally cool to room temperature in the oven. The final product of the reaction was washed 3-5 times with deionized water and absolute ethanol, and dried in an oven at 60 °C for 1...

Embodiment 3

[0029] Analytically pure Bi(NO 3 ) 3 ·5H 2 O and FeCl 3 ·6H 2 O was dissolved in the ethylene glycol solution at a molar ratio of 0.7:1 and stirred well until completely dissolved. 200 mL of deionized water was added to the above solution, stirred, and then excess concentrated ammonia water was added dropwise to completely precipitate the solution. The supernatant was poured out, deionized water was added to the obtained precipitate, shaken, washed and centrifuged, and the above washing operation was repeated 2-3 times. 10 mol / L NaOH was added to the washed precipitate, stirred for 30 min to form a solution and put into a stainless steel autoclave with a polytetrafluoroethylene lining, and reacted in an oven at 180 °C for 72 h. After the reaction, turn off the power of the oven and let the autoclave naturally cool to room temperature in the oven. The final product of the reaction was washed 3-5 times with deionized water and anhydrous ethanol, and dried in an oven at 60 ...

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Abstract

The invention relates to a method for preparing a Bi2Fe4O9 nanosheet material. The method comprises the following steps: (a) dissolving analytically pure bismuth salt and ferric salt in an ethylene glycol solution according to a molar ratio of (0.7-1.2): 1; (b) adding deionized water into the solution formed in the step (a), uniformly stirring, and then dropwise adding excessive stronger ammonia water until the solution is completely precipitated; (c) pouring out the supernatant in the step (b), adding deionized water into the obtained precipitate, oscillating, washing and centrifuging; (d) adding a NaOH solution into the repeatedly washed precipitate in the step (c), stirring for 30 minutes to form a solution, filling the solution into a reaction kettle, and reacting for a period of time; and (e) after the step (d) is finished, naturally cooling the reaction kettle to room temperature, washing the final reaction product with deionized water and absolute ethyl alcohol respectively, and drying in a drying oven at 60 DEG C for 12 hours to obtain the Bi2Fe4O9 nanosheet material.

Description

technical field [0001] The invention belongs to the field of environmental engineering, relates to the preparation and application of piezoelectric catalytic materials, and more particularly relates to Bi 2 Fe 4 O 9 Preparation of nanosheet materials and piezoelectric catalysis of organic pollutants. Background technique [0002] Environmental pollution and shortage of clean energy are one of the most pressing issues, threatening the sustainable development of human civilization. Water pollution caused by the discharge of biorefractory organics into wastewater is one of the main sources of environmental pollution. So far, researchers have specifically explored several treatment technologies combined with advanced oxidation processes (AOPs) to remove organic pollutants from water, such as Fenton oxidation, UV photolysis, ozone oxidation, and photocatalysis, however, they are either inefficient or difficult to catalyze. Large-scale industrialization may require relatively ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00B01J23/843B01J37/03B01J37/10C02F1/72C02F1/467C02F101/30C02F101/34C02F101/36C02F101/38
CPCC01G49/00C02F1/725C02F1/4672B01J23/8437B01J23/002B01J37/031B01J37/10C02F2101/40C02F2101/38C02F2101/34C02F2101/36C02F2101/308C01P2004/61C01P2002/72C01P2004/03B01J35/33
Inventor 王文辉苏闯建李朝林
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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