Magnetic Fe2O3/BN composite material as well as preparation method and application thereof

A composite material, fe2o3 technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage treatment, etc., to achieve good removal effect, reduce loss and promote separation

Active Publication Date: 2020-06-05
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Whether it is possible to combine boron nitride with iron-based semiconductor catalysts to prepare a catalytic material with excellent performance and apply it to the field of water pollutant treatment has not been reported in the literature

Method used

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  • Magnetic Fe2O3/BN composite material as well as preparation method and application thereof
  • Magnetic Fe2O3/BN composite material as well as preparation method and application thereof
  • Magnetic Fe2O3/BN composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Ultrasonically disperse 0.026 g ferrous chloride tetrahydrate, 0.108 g ferric chloride hexahydrate and 7.0 mg BN in 80 mL deionized water, heat to 70 °C in an oil bath, add 4 mL ammonia solution, and react for 30 min. After washing with ion water and ethanol, it is recovered by magnet, and then dried to obtain magnetic Fe 2 o 3 / BN composites.

[0031] 10 mg of prepared magnetic Fe 2 o 3 The / BN composite material was put into a photochemical reaction apparatus for photocatalytic degradation test, and the total removal rate of tetracycline by the composite material reached 44% in 90 minutes.

Embodiment 2

[0033]0.026 g ferrous chloride tetrahydrate, 0.108 g ferric chloride hexahydrate and 9.8 mg BN were ultrasonically dispersed in 80 mL deionized water, heated to 90 °C in an oil bath, added 4 mL ammonia solution, and continued to react for 20 min. After washing with deionized water and ethanol, it is recovered by a magnet, and then dried to obtain magnetic Fe 2 o 3 / BN composites.

[0034] 10 mg of prepared magnetic Fe 2 o 3 The / BN composite material was put into a photochemical reaction apparatus for photocatalytic degradation test, and the total removal rate of tetracycline by the composite material reached 54% in 90 minutes.

Embodiment 3

[0036] 0.026 g of ferrous chloride tetrahydrate, 0.108 g of ferric chloride hexahydrate and 14 mg of BN were ultrasonically dispersed in 80 mL of deionized water, heated to 80 °C in an oil bath, 4 mL of ammonia solution was added, and the reaction was continued for half an hour, the product After washing with deionized water and ethanol, it is recovered by a magnet, and then dried to obtain magnetic Fe 2 o 3 / BN composites.

[0037] Take 10 mg of the prepared magnetic Fe 2 o 3 The / BN composite material was put into a photochemical reaction apparatus for photocatalytic degradation test, and it was measured that the total removal rate of tetracycline by the composite material reached 70% in 90 minutes.

[0038] Take 10 mg of the prepared magnetic Fe 2 o 3 / BN composites were placed in a photochemical reaction apparatus under dark conditions, and 50 mg PDS was added. It was measured that the removal rate of tetracycline reached 74% in 90 minutes under this condition.

[00...

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PUM

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Abstract

The invention belongs to the technical field of catalytic material preparation, and particularly relates to a magnetic Fe2O3/BN composite material and a preparation method and an application thereof.The positive-valent iron ions are adsorbed on BN by utilizing electronegativity of the surface of BN, so that the magnetic Fe2O3/BN composite material is prepared by a one-pot method and is applied toremoval of antibiotic residues in a water body. The synthesis method is simple, and the prepared magnetic Fe2O3/BN composite material has good magnetism and is easy to recycle. In a photocatalysis experiment, the magnetic Fe2O3/BN composite material shows degradation activity superior to that of a monomer. The material can be used as a catalyst for PDS activation; peroxydisulfate (PDS) is subjected to photo-synergistic activation to remove wastewater pollutants, free radicals with strong oxidizing ability generated by PDS activation and free radicals generated by photocatalytic excitation ofFe2O3 realize dual-promotion catalytic action, and application of the iron-based composite material in the field of photocatalysis and in the aspect of PDS activation is further developed.

Description

technical field [0001] The invention belongs to the technical field of preparation of catalytic materials, in particular to a magnetic Fe 2 o 3 / BN composite material and its preparation method and application. Background technique [0002] Advanced Oxidation Process (Advanced Oxidation Process), as an effective method for degrading toxic, biorefractory, and persistent organic pollutants, has attracted extensive attention from researchers. Advanced oxidation technology utilizes the strong oxidizing free radicals (such as ‧OH, O 2 .- etc.) to oxidize organic matter into low-toxic small molecules or directly mineralize into harmless inorganic matter. Recently, a sulphate free radical (SO 4 .- ) to degrade pollutants based on persulfate-based advanced oxidation technology is favored, the SO produced by this technology 4 .- Compared with ‧OH, the process of driving degradation has many advantages, such as higher redox potential and longer half-life. Therefore, the advan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F1/72C02F101/34C02F101/38
CPCB01J27/24B01J35/0033B01J35/004C02F1/30C02F1/722C02F1/725C02F2305/10C02F2101/34C02F2101/38
Inventor 刘锡清汪涛闫永胜周志平
Owner JIANGSU UNIV
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