Gamma-Fe2O3-TiO2 magnetic nanocomposite material, and preparation method and applications thereof

A technology of -fe2o3-tio2 and magnetic nano, which is applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of carcinogenic risk, hereditary gene defects, etc., and achieve the effect of improving application prospects and photocatalytic performance

Active Publication Date: 2017-05-03
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hexavalent chromium is an ingestion poison / inhalation extremely poison, long-term exposure has the risk of carcinogenesis, and is more likely to cause genetic defects
γ-Fe 2 o 3 and TiO 2 bonded nanocomposites

Method used

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  • Gamma-Fe2O3-TiO2 magnetic nanocomposite material, and preparation method and applications thereof
  • Gamma-Fe2O3-TiO2 magnetic nanocomposite material, and preparation method and applications thereof
  • Gamma-Fe2O3-TiO2 magnetic nanocomposite material, and preparation method and applications thereof

Examples

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Embodiment 1

[0054] A kind of gamma-Fe of the present invention2 o 3 -TiO 2 Magnetic nanocomposites, the γ-Fe 2 o 3 -TiO 2 Magnetic nanocomposites including γ-Fe 2 o 3 Nanomaterials and TiO 2 Nanomaterials, TiO 2 Nanomaterials Loaded on γ-Fe 2 o 3 A core-shell structure is formed on the nanomaterial.

[0055] A kind of γ-Fe in the above-mentioned present embodiment 2 o 3 -TiO 2 The preparation method of magnetic nanocomposite material, comprises the following steps:

[0056] 1. Preparation of γ-Fe 2 o 3 nanomaterials:

[0057] 1-1. Dissolve 5.275g of ferrous chloride solid powder and 0.8g of sodium lauryl sulfate in 200mL of distilled water, add 40mL of 0.2moL / L hydrogen peroxide dropwise, and a brownish yellow precipitate appears in the solution.

[0058] 1-2. Shake the reaction system in step 1-1 for 2 hours at a rotation speed of 180 rpm and a temperature of 25° C. to obtain a shaking reaction product.

[0059] 1-3. Filter the shaking reaction product in step 1-2, and d...

Embodiment 2

[0079] A kind of gamma-Fe of the present invention 2 o 3 -TiO 2 The application of magnetic nanocomposite photocatalytic removal of bisphenol A in water comprises the following steps:

[0080] Weigh respectively the gamma-Fe in 0.05g embodiment 1 2 o 3 Nanomaterials, FT1, FT2, FT3 and TiO in Comparative Example 1 2 Nanomaterials were added to 100 mL of bisphenol A solution with a concentration of 40 mg / L, and the pH value of the bisphenol A solution was adjusted to 3 with 0.1 g / L hydrochloric acid solution and 0.1 g / L sodium hydroxide solution. Stir continuously at room temperature, and carry out dark reaction for 30 min under dark conditions. Take 5 mL of the sample in the reaction system, filter the treated aqueous solution with a filter membrane with a pore size of 0.22 microns, and detect the concentration of bisphenol A. The purpose of detecting the concentration of bisphenol A at this time is to observe the adsorption of bisphenol A by the material after 30 minutes ...

Embodiment 3

[0086] A kind of gamma-Fe of the present invention 2 o 3 -TiO 2 The application of magnetic nanocomposite photocatalytic removal of bisphenol A and hexavalent chromium in water comprises the following steps:

[0087] Weigh respectively the gamma-Fe in 0.05g embodiment 1 2 o 3 Nanomaterials, FT1, FT2, FT3 and TiO in Comparative Example 1 2 Nano material, join in the mixed solution of bisphenol A and hexavalent chromium, adjust the pH value of the mixed solution of bisphenol A and hexavalent chromium with the hydrochloric acid solution of 0.1g / L and the sodium hydroxide solution of 0.1g / L 3. The mixed solution of bisphenol A and hexavalent chromium is formed by mixing 50mL of bisphenol A solution with a concentration of 80mg / L and 50mL of a hexavalent chromium solution with a concentration of 40mg / L. Stir continuously at room temperature, and carry out dark reaction for 30 min under dark conditions. Take 5mL of the sample of the reaction system, filter the treated aqueous ...

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Abstract

The invention provides a gamma-Fe2O3-TiO2 magnetic nanocomposite material, and a preparation method and applications thereof. The gamma-Fe2O3-TiO2 magnetic nanocomposite material comprises a gamma-Fe2O3 nano material and a TiO2 nano material; the gamma-Fe2O3 nano material is loaded with theTiO2 nano material so as to form a core-shell structure. The preparation method comprises following steps: preparation of a gamma-Fe2O3 mixed solution, loading of TiO2, and calcination treatment. The preparation method is simple in operation; preparation success rate is high; the prepared material is stable; the obtained gamma-Fe2O3-TiO2 magnetic nanocomposite material possesses nanoscale size, is wide in photoresponse range, and high in photocatalytic degradation efficiency, is convenient to recycle, can be widely used for removing bisphenol A and hexavalent chromium in waste water at the same time, realizing synergistic degradation of the two pollutants, and removing bisphenol A and hexavalent chromium in water with high efficiency.

Description

technical field [0001] The invention relates to the field of materials and environment, and relates to a gamma-Fe 2 o 3 -TiO 2 Magnetic nanocomposite material and its preparation method and application, specifically related to a core-shell structure γ-Fe 2 o 3 -TiO 2 Magnetic nanocomposite material and its preparation method and γ-Fe 2 o 3 -TiO 2 Application of magnetic nanocomposites in photocatalytic degradation of bisphenol A in wastewater and synergistic reduction of hexavalent chromium. Background technique [0002] Bisphenol A (BPA), as an endocrine disruptor (EDCs), is an important raw material for epoxy resin, polycarbonate, phenolic resin, unsaturated polyester resin, flame retardant and other products. Due to the mass production and widespread use in industry, bisphenol A diffuses and migrates into the environment through various channels. According to the U.S. Environmental Protection Agency, the total amount of bisphenol A released into the environment e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047C01G49/06C02F1/00B82Y30/00B82Y40/00C02F101/20C02F101/34
Inventor 黄小明彭艳蓉曾光明王久玲付丽欢汤琳晏铭
Owner HUNAN UNIV
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