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Preparation and application of bismuth ferrite loaded graphene composite material

A composite material and graphene technology, applied in the field of visible light catalysis, to achieve the effects of high degradation stability, improved dispersion, and excellent photocatalytic degradation performance

Active Publication Date: 2021-02-19
BEIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this extensive economic development model at the cost of sacrificing resources and the environment has caused huge environmental and resource problems in today's society

Method used

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  • Preparation and application of bismuth ferrite loaded graphene composite material
  • Preparation and application of bismuth ferrite loaded graphene composite material
  • Preparation and application of bismuth ferrite loaded graphene composite material

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preparation example Construction

[0040] The preparation method of bismuth ferrite used in the present invention is as follows:

[0041] Dissolve bismuth nitrate pentahydrate and ferric nitrate nonahydrate in nitric acid with the ratio of the amount of substance being 1:1, and stir until the crystals are all dissolved to obtain nitric acid solution; the above nitric acid solution is slowly added dropwise to excess potassium hydroxide solution, An orange-yellow precipitate is produced, continue to add dropwise until the precipitate is complete, stir rapidly for 15-35 minutes to mix evenly, centrifuge, and wash to obtain bismuth ferrite.

[0042] The technical solution of the present invention will be described in further detail below in conjunction with specific embodiments and accompanying drawings:

Embodiment 1

[0044] A preparation method of bismuth ferrite loaded graphene composite material, specifically comprising the following steps:

[0045] (1) Preparation of modified graphene

[0046]In parts by weight, add 4.5 parts by weight of flake graphite powder and 2.5 parts by weight of sodium nitrate to the beaker, then add concentrated sulfuric acid to make the concentration of graphite powder 0.02g / mL, put the beaker in an ice bath, and continue to add 25 parts by weight. Parts by weight of potassium permanganate, the temperature was kept at 25°C by stirring, and heated in a water bath at 25°C for 25 minutes after 5 minutes. Add deionized water to the beaker, when the temperature rises to 80°C, place it at room temperature for 8 minutes, after the temperature drops to 55°C, keep it at this temperature for 6 minutes, then add 100 parts by weight of normal temperature hydrogen peroxide, stop reaction, suction filtration, washing, and drying to obtain graphene oxide.

[0047] Put usni...

Embodiment 2

[0051] A preparation method of bismuth ferrite loaded graphene composite material, specifically comprising the following steps:

[0052] (1) Preparation of modified graphene

[0053] In parts by weight, add 6 parts by weight of flake graphite powder and 4 parts by weight of sodium nitrate to the beaker, then add concentrated sulfuric acid to make the concentration of graphite powder 0.035g / mL, place the beaker in an ice bath, and continue to add 21 Parts by weight of potassium permanganate, the temperature was kept at 25°C by stirring, and heated in a water bath at 22°C for 30 minutes after 3 minutes. Add deionized water to the beaker, when the temperature rises to 85°C, place it at room temperature for 10 minutes, after the temperature drops to 50°C, keep it at this temperature for 8 minutes, then add 90 parts by weight of normal temperature hydrogen peroxide, stop reaction, suction filtration, washing, and drying to obtain graphene oxide.

[0054] Put usnic acid and the ab...

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Abstract

The invention discloses preparation and application of a bismuth ferrite loaded graphene composite material. The preparation method specifically comprises the following steps: adding bismuth ferrite into a modified graphene solution for ultrasonic treatment to obtain a turbid liquid; and adding alkali liquor into the turbid liquid, conducting stirring continuously, and controlling the temperatureto be lower than 37 DEG C in the heating process. The modified graphene is prepared by modifying graphene oxide with usnic acid. The prepared bismuth ferrite loaded graphene composite material has excellent photocatalytic degradation performance, high degradation stability and certain antibacterial activity, can also promote obvious reduction of pH, COD value and chromaticity in wastewater, and has good application in industrial wastewater and waste gas.

Description

technical field [0001] The invention belongs to the field of visible light catalysis, and in particular relates to the preparation and application of a bismuth ferrite-loaded graphene composite material. Background technique [0002] China's economic development has always maintained a strong momentum. Coal, thermal power generation, metallurgy, non-ferrous metals, cement, building materials, papermaking, petrochemicals, chemicals and other high-energy-consuming and high-pollution industries are the main driving forces supporting China's high-speed economic growth. However, this extensive economic development model at the cost of sacrificing resources and the environment has caused huge environmental and resource problems in today's society. If China's economy wants to maintain long-term and stable development, it is necessary to establish an energy supply system and consumption pattern that are compatible with economic development and that are harmless to the environment. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02C02F1/30C02F1/50B01D53/86C02F103/34
CPCB01J31/0208C02F1/30C02F1/50B01D53/86C02F2103/34B01D2259/802B01J35/39Y02W10/37
Inventor 战瑞瑞刘畅姜松
Owner BEIHUA UNIV
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