Mesoporous magnetic nanometer iron oxide material, and preparation method and applications thereof

A technology of nano-iron oxide and magnetic nano-technology, which is applied in iron oxide, chemical instruments and methods, iron oxide/iron hydroxide, etc., can solve the problems of difficult reaction conditions, cumbersome process, and low utilization rate of raw materials, and achieve cheap and easy raw materials. The effect of large adsorption capacity and fast adsorption rate

Inactive Publication Date: 2018-08-07
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has serious defects such as adding a large amount of organic solvent, low utilization rate of raw materials, complicated process, and difficult realization of reaction conditions.

Method used

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  • Mesoporous magnetic nanometer iron oxide material, and preparation method and applications thereof
  • Mesoporous magnetic nanometer iron oxide material, and preparation method and applications thereof
  • Mesoporous magnetic nanometer iron oxide material, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this embodiment, a method for preparing magnetic nano iron oxide comprises the following steps:

[0037] a. Preparation of nano-iron oxide precursor:

[0038] Using CS(NH 2 ) 2 As a precipitant, weigh 0.048mol of CS(NH 2 ) 2 With 0.012mol of inorganic iron salt Fe 2 (SO 4 ) 3 Dissolve in 80ml of water to prepare a mixed aqueous solution of precipitating agent and inorganic iron salt, stir for 30min, transfer to a 100ml polytetrafluoroethylene-lined stainless steel reaction kettle, seal the reaction kettle and place it in a dry box at 200°C Carry out the hydrothermal reaction for 30 hours, then cool naturally to room temperature, filter out the product precipitate, and wash repeatedly with distilled water and absolute ethanol twice, until the cleaning solution of the product precipitate is neutral, and then the product precipitate Dry at a constant temperature of 60°C for 5h to obtain Fe 2 o 3 the precursor powder;

[0039] b. Mesoporous magnetic nano-Fe 2 ...

Embodiment 2

[0046] This embodiment is basically the same as Embodiment 1, especially in that:

[0047] In this embodiment, a method for preparing magnetic nano iron oxide comprises the following steps:

[0048] a. Preparation of nano-iron oxide precursor:

[0049] Using CS(NH 2 ) 2 As a precipitant, weigh 0.048mol of CS(NH 2 ) 2 With 0.012mol of inorganic iron salt Fe 2 (SO 4 ) 3 Dissolve in 80ml of water to prepare a mixed aqueous solution of precipitating agent and inorganic iron salt, stir for 30min, transfer to a 100ml polytetrafluoroethylene-lined stainless steel reaction kettle, seal the reaction kettle and place it in a dry box at 200°C Carry out the hydrothermal reaction for 30 hours, then cool naturally to room temperature, filter out the product precipitate, and wash repeatedly with distilled water and absolute ethanol twice, until the cleaning solution of the product precipitate is neutral, and then the product precipitate Dry at a constant temperature of 60°C for 5h to...

Embodiment 3

[0056] This embodiment is basically the same as the previous embodiment, and the special features are:

[0057] In this example, the mesoporous magnetic nano-Fe 2 o 3 material, the mesoporous magnetic nano-Fe 2 o 3 The material is used as an iron oxide Cr(VI) adsorbent, and the adsorption method is used to adsorb the highly toxic pollutant Cr(VI) in the heavy metal ion polluted water; and the adsorbent can separate the heavy metal Cr(VI) from the solution by controlling the external magnetic field. Separate and purify Cr-polluted wastewater.

[0058] In this example, when the magnetic nano-Fe 2 o 3 After the adsorption of Cr(VI) by the adsorbent reaches equilibrium, a magnetic rotor is used to mechanically stir the Cr(VI) solution to be adsorbed, so that the magnetic nano-Fe 2 o 3 The adsorbent is absorbed on the magnetic rotor, and then the magnetic rotor is taken out from the Cr(VI) solution to be adsorbed, so that the heavy metal Cr(VI) is separated from the solution...

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Abstract

The invention discloses a mesoporous magnetic nanometer iron oxide material, and a preparation method and applications thereof. According to the preparation method, a precipitating agent and Fe2(SO4)3are dissolved in water so as to obtain a mixed solution; the mixed solution is stirred to be uniform, and is sealed in a drying box for hydro-thermal reaction so as to obtain a nanometer iron oxide precursor precipitate; the nanometer iron oxide precursor precipitate is subjected to distilled water washing, ethanol washing, centrifugation separation, drying, and sintering at room temperature successively so as to obtain the adsorbent. The preparation method is simple; the raw materials are cheap and easily available; the obtained mesoporous magnetic nanometer iron oxide adsorbent possesses excellent adsorption capacity on Cr (VI).

Description

technical field [0001] The present invention relates to an iron oxide material, a preparation method and its application, in particular to a nano-iron oxide material, a preparation method and its application, in particular to an iron oxide Cr(VI) used for chromium pollution treatment by an adsorption method The preparation method and application of the adsorbent are applied in the technical field of wastewater treatment. Background technique [0002] Heavy metal chromium pollution mainly comes from mining, electroplating, leather tanning and other industrial wastewater and landfill leachate. The valence states of chromium in the water environment are mainly Cr(III) and Cr(VI). The toxicity of different chromium compounds is different, and the toxicity of Cr(VI) is the most toxic, which is 100 times that of Cr(III). (VI) industrial wastewater can easily cause heavy metal chromium pollution in surface water and groundwater, causing serious harm to the ecological environment. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/28B01J20/30C01G49/06C01G49/08C02F1/28C02F1/48C02F101/22
CPCB01J20/06B01J20/28009C01G49/06C01G49/08C02F1/281C02F1/488C02F2101/22
Inventor 李永乐顾学昊
Owner SHANGHAI UNIV
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