Nano ferric oxide material and its preparing process and use in water treatment

A technology of nanomaterials and oxides, which is applied in ferrous oxides, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of lengthy and complicated steps, limited application, high price, etc., and achieve high specific surface area , The reaction conditions are not high, and the effect of the ability to remove pollutants is good

Inactive Publication Date: 2007-06-27
INST OF CHEM CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the existing reports on iron oxide three-dimensional nanomaterials, the iron source materials used are often toxic and expensive iron salts, and the reaction often needs to be carried out under harsh hydrothermal conditions, which is largely limits th

Method used

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  • Nano ferric oxide material and its preparing process and use in water treatment
  • Nano ferric oxide material and its preparing process and use in water treatment
  • Nano ferric oxide material and its preparing process and use in water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1.2 g of ferric chloride hexahydrate, 2.7 g of urea and 7.2 g of tetrabutylammonium bromide were added to 180 ml of ethylene glycol, followed by heating with stirring. Heating was stopped after 30 minutes at reflux. After the solution was cooled to room temperature, the precipitate was centrifuged and washed four times with absolute ethanol, and then the washed precipitate was dried in an oven at 70° C. for 12 hours to obtain the iron precursor.

[0047] Put the obtained iron precursor into a muffle furnace, heat from room temperature to 450°C in an air atmosphere (the heating rate is about 40°C / min), stop heating after constant temperature for 3 hours, and cool to room temperature to obtain α-Fe 2 o 3 ; The precursor of the iron obtained is put into a tube furnace, and high-purity nitrogen gas is fed into the tube furnace for 30 minutes, and then heated from room temperature to 450° C. (the heating rate is about 40° C. / min) while continuing to feed nitrogen gas. Aft...

Embodiment 2

[0049] Trisodium arsenate (Na 3 AsO 4 12H 2 (0) and ultra-clean water to prepare a solution with arsenic concentration of about 10ppm (mg / L), and adjust the pH value to 4 with hydrochloric acid or sodium hydroxide solution. Get the prepared arsenic solution of 25ml, add 0.05g α-Fe prepared by the present invention wherein 2 o 3 nanomaterial and start stirring. After 30 minutes, solid-liquid separation was performed by centrifugation, and the supernatant was collected. The content of arsenic in the solution was measured by inductively coupled plasma atomic emission spectroscopy (ICP-AES). The results are shown in Table 1.

Embodiment 3

[0051] By the same procedure in Example 2, but the adsorbent added is Fe prepared by the present invention 3 o 4 nanomaterials. The results are shown in Table 1.

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Abstract

The nanometer iron oxide material including alpha-Fe2O3, gamma-Fe2O3 and Fe3O4 has porous surface structure comprising nanometer grains and 3D self-assembled structure. Its preparation process includes the following steps: 1. adding iron salt, urea and protectant into diol and similar organic solvent via stirring to obtain mixture solution; 2. heating and stirring the mixture solution to obtain the dispersed liquid of iron oxide precursor; 3. washing the precipitate, drying at 60-100 deg.c obtain iron oxide precursor; and 4. ignition the iron oxide precursor at 500 deg.c for 2-5 hr in the temperature raising rate of 30-50 deg.c/min to obtain the target product. The nanometer iron oxide material is used in water treatment to eliminate heavy metal ions and other toxic ions as well as organic pollutant from water.

Description

technical field [0001] The invention relates to an iron oxide nanometer material. [0002] The invention also relates to a method for the preparation of the aforementioned materials. [0003] The invention also relates to the use of the aforementioned materials. Background technique [0004] With the development of nanotechnology, nanomaterial science has become an indispensable and important field in the development of current material science. In a sense, the progress of nanomaterials research is bound to push many disciplines such as physics, chemistry, and biology to a new level, and at the same time, it will also bring new opportunities to the research of the entire science in the 21st century. Nanomaterials include zero-dimensional, one-dimensional, two-dimensional and three-dimensional nanomaterials. Factors such as size, shape, and dimension strongly affect various properties of materials and largely determine their application prospects. In recent years, nanomat...

Claims

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Application Information

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IPC IPC(8): C01G49/06C01G49/08C02F1/28C02F1/48C02F101/10C02F101/20C02F101/30
Inventor 万立骏钟良枢胡劲松
Owner INST OF CHEM CHINESE ACAD OF SCI
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