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Bismuth/bismuth ferrite visible-light-driven photocatalyst material as well as preparation method and application thereof

A technology of bismuth ferrite and visible light, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of cost increase, affecting the service life of photocatalysts, structural instability, etc., and achieve low price , The preparation method is flexible and controllable, and the effect of strong structural stability

Pending Publication Date: 2022-04-26
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] According to the research of the inventors, bismuth ferrite doped with some metal ions can improve the photocatalytic performance of bismuth ferrite, but due to the doping of bismuth ferrite and metal ions, it will inevitably cause structural instability and affect The service life of the photocatalyst, and the need to use additional reagents, resulting in an increase in cost

Method used

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  • Bismuth/bismuth ferrite visible-light-driven photocatalyst material as well as preparation method and application thereof
  • Bismuth/bismuth ferrite visible-light-driven photocatalyst material as well as preparation method and application thereof
  • Bismuth/bismuth ferrite visible-light-driven photocatalyst material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Dissolve 0.004mol of bismuth nitrate pentahydrate and 0.002mol of ferric nitrate nonahydrate in 20mL of ethylene glycol methyl ether, mix well, add 0.006mol of tartaric acid until completely dissolved, add 25mL of concentrated ammonia water dropwise until the viscosity of the system rises, then dry at 120°C, Grinding, the ground sample was heated from 80°C to 600°C with a heating rate of 5°C / min, and was reduced with 0.05mol sodium borohydride at 500°C for 60 minutes, and then washed and centrifuged with absolute ethanol and deionized water several times to obtain Bismuth / bismuth ferrite photocatalytic composites.

[0041] The XRD spectrum of the bismuth / bismuth ferrite photocatalytic composite material prepared in this embodiment is as follows figure 1 , indicating that bismuth metal was grown in situ during the synthesis of bismuth ferrite.

[0042] figure 2 It can be seen that the bismuth / bismuth ferrite photocatalytic material system has a lower photoluminescence...

Embodiment 2

[0046] Dissolve 0.004mol of bismuth nitrate pentahydrate and 0.002mol of ferric nitrate nonahydrate in 20mL of isopropanol and mix well, then add 0.006mol of citric acid until completely dissolved, add 10mL of concentrated ammonia water dropwise until the viscosity of the system rises, then dry and grind at 120°C , the ground sample was heated from 100°C to 600°C with a heating rate of 5°C / min, and was reduced with 0.05mol sodium borohydride at 600°C for 30min, then washed and centrifuged with absolute ethanol and deionized water several times to obtain bismuth / Bismuth ferrite photocatalytic composites.

Embodiment 3

[0048] Dissolve 0.004mol of bismuth nitrate pentahydrate and 0.002mol of ferric nitrate nonahydrate in 20mL of ethylene glycol, mix well, add 0.006mol of gluconic acid until completely dissolved, add 20mL of concentrated ammonia water dropwise until the viscosity of the system rises, then dry and grind at 120°C , the ground sample was heated from 100°C to 600°C with a heating rate of 5°C / min, and was reduced with 0.05mol sodium borohydride at 400°C for 60min, then washed and centrifuged with absolute ethanol and deionized water several times to obtain bismuth / Bismuth ferrite photocatalytic composites.

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Abstract

The invention belongs to the technical field of new materials, and relates to a bismuth / bismuth ferrite visible-light-driven photocatalyst material as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving bismuth nitrate and ferric nitrate in an organic solvent, adding a hydroxycarboxylic acid chelating agent until the materials are completely dissolved, dropwise adding ammonia water, uniformly mixing, drying, grinding, calcining the ground sample in an air atmosphere, and carrying out reduction reaction by using hydroboron in an inert atmosphere under a heating condition, thereby obtaining the bismuth-ferric oxide composite material. According to the bismuth / bismuth ferrite visible-light-driven photocatalyst material provided by the invention, metal and a photocatalytic material can be combined more tightly, so that the bismuth / bismuth ferrite visible-light-driven photocatalyst material has more excellent structural stability, and the bismuth / bismuth ferrite visible-light-driven photocatalyst material also has higher photocatalytic activity while the cost is reduced without using additional chemical reagents.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a bismuth / bismuth ferrite visible light catalyst material and a preparation method and application thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] According to the research of the inventors, bismuth ferrite doped with some metal ions can improve the photocatalytic performance of bismuth ferrite, but due to the doping of bismuth ferrite and metal ions, it will inevitably cause structural instability and affect The service life of the photocatalyst, and the need to use additional reagents, resulting in an increase in cost. Contents of the invention [0004] In or...

Claims

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Application Information

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IPC IPC(8): B01J23/843B01J37/16C02F1/32C02F101/34C02F101/38
CPCB01J23/8437B01J23/002B01J37/16C02F1/32C02F2101/34C02F2101/345C02F2101/38C02F2305/10B01J35/39
Inventor 周卫姜永旺李贞子王世杰郭丽萍
Owner QILU UNIV OF TECH
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