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Preparation method of alpha-phase ferric oxide/platinum hybridized nanoring

A technology of ferric oxide and nano rings, which is applied in the field of composite materials, can solve the problems of high electron-hole recombination rate and short hole diffusion path, and achieve the effect of simple process, mild conditions and superior photocatalytic activity

Inactive Publication Date: 2013-11-27
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its performance is greatly limited by some inherent defects, such as short hole diffusion path, high electron-hole recombination rate, etc.

Method used

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  • Preparation method of alpha-phase ferric oxide/platinum hybridized nanoring
  • Preparation method of alpha-phase ferric oxide/platinum hybridized nanoring
  • Preparation method of alpha-phase ferric oxide/platinum hybridized nanoring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Prepare 40mL water-soluble ferric salt solution (ferric chloride, FeCl 3 ·6H 2 O), and adding acid phosphate (NH 4 h 2 PO 4 ) and sulfate (Na 2 SO 4 ), wherein the molar concentration of ferric chloride is 0.02mM, NH 4 h 2 PO 4 Molar concentration is 0.2mM, Na 2 SO 4 The molar concentration is 0.6mM (the molar concentration ratio of acid phosphate and sulfate is 2:6 in this embodiment, and the molar concentration ratio of ferric salt and sulfate is 1:30).

[0022] (2) Ultrasound the solution obtained in step (1) for 3-5 minutes, mix it evenly, and then transfer it to a 50mL stainless steel reaction kettle lined with polytetrafluoroethylene (the volume ratio of the reaction kettle in this example is 80%) , sealed and heated to 210 ° C for 24 hours.

[0023] (3) Cool down to room temperature naturally after the reaction is complete, centrifuge the sediment at the bottom of the kettle, wash with absolute ethanol and deionized water successively, and dry the ...

Embodiment 2

[0031] (1) Prepare 40mL water-soluble ferric salt solution (ferric chloride, FeCl 3 ·6H 2 O), and adding acid phosphate (NH 4 h 2 PO 4 ) and sulfate (Na 2 SO 4 ), wherein the molar concentration of ferric chloride is 0.02mM, NH 4 h 2 PO 4The molar concentration is 0.6mM, Na 2 SO 4 The molar concentration is 0.6mM (the molar concentration ratio of acid phosphate and sulfate is 6:6 in this embodiment, and the molar concentration ratio of ferric salt and sulfate is 1:30).

[0032] (2) Ultrasound the solution obtained in step (1) for 3-5 minutes, mix it evenly, and then transfer it to a 50mL stainless steel reaction kettle lined with polytetrafluoroethylene (the volume ratio of the reaction kettle in this example is 80%) , sealed and heated to 220 ° C for 24 hours.

[0033] (3) Same as embodiment 1.

[0034] (4) Same as embodiment 1.

[0035] (5) Immerse the powder obtained in step (4) into 40mL of ethylene glycol (in this example, the volume ratio of ethylene glycol ...

Embodiment 3

[0037] (1) Prepare 80mL water-soluble ferric salt solution (ferric nitrate, Fe(NO 3 ) 3 9H 2 O), and adding acid phosphate (NH 4 h 2 PO 4 ) and sulfate (Na 2 SO 4 ), wherein the molar concentration of ferric nitrate is 0.02mM, NH 4 h 2 PO 4 Molar concentration is 0.4mM, Na 2 SO 4 The molar concentration is 0.6mM (in this embodiment, the molar concentration ratio of acid phosphate and sulfate is 4:6, and the molar concentration ratio of ferric salt and sulfate is 1:30).

[0038] (2) Ultrasound the solution obtained in step (1) for 3 to 5 minutes, mix it evenly, and then transfer it to a 100mL stainless steel reaction kettle lined with polytetrafluoroethylene (the volume ratio of the reaction kettle in this example is 80 %), sealed and heated to 220°C for 32h.

[0039] (3) Same as embodiment 1.

[0040] (4) Prepare 2 mL of chloroplatinic acid solution (H 2 PtCl 6 ·6H 2 0, the molar concentration is 10 mM), and then add 8 mL of absolute ethanol to the chloroplatin...

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Abstract

The invention discloses a preparation method of an alpha-phase ferric oxide / platinum hybridized nanoring, relating to a composite material. The invention provides a preparation method of an alpha-phase ferric oxide / platinum hybridized nanoring, which is capable of improving the photocatalytic activity of alpha-phase ferric oxide, simple in process and mild in condition. The preparation method comprises the following steps of (1) preparing a water-soluble ferric salt solution, and adding acid phosphate and sulfate; (2) carrying out ultrasound treatment on the solution obtained in the step (1), then, transferring the solution into a reaction kettle, sealing the reaction kettle, and heating to react; (3) cooling the solution to the room temperature after the reaction is complete, centrifugally separating precipitates at the bottom of the kettle, washing, and drying to obtain an alpha-phase ferric oxide nanoring; (4) preparing a chloroplatinic acid solution, then, sequentially adding absolute ethyl alcohol and the alpha-phase ferric oxide nanoring, carrying out ultrasound treatment, then, drying and collecting the obtained powder; and (5) immersing the powder obtained in the step (4) into ethylene glycol, heating to react, then, washing the product, and drying the product to obtain the alpha-phase ferric oxide / platinum hybridized nanoring.

Description

technical field [0001] The invention relates to a composite material, in particular to a method for preparing an α-phase ferric oxide / platinum hybrid nanoring. Background technique [0002] α-phase ferric oxide is an important metal oxide, which has the characteristics of low cost and environmental friendliness, and has been widely used in flash coatings, plastics, electronics, magnetic recording materials, catalysts, and biomedical engineering. In addition, α-phase ferric oxide is also an important n-type semiconductor with a bandgap width of 2.2eV and strong absorption in the visible light region, so it is also used as a photocatalyst to degrade organic pollutants. However, its performance is greatly limited by some inherent defects, such as short hole diffusion path and high electron-hole recombination rate. In order to improve the performance of α-phase ferric oxide, the more common solution is to prepare a specific morphology structure or doping other atoms. In additi...

Claims

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Application Information

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IPC IPC(8): C01G49/06B22F9/24B82Y40/00B82Y30/00
Inventor 王周成梁汉锋王世强
Owner XIAMEN UNIV
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