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Preparation method of recessed alpha-phase ferric oxide cube

A ferric oxide, cube technology, applied in the direction of iron oxide, iron oxide/iron hydroxide, etc., to achieve the effect of uniform distribution, uniform particle size and mild conditions

Inactive Publication Date: 2015-02-04
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some α-phase ferric oxides with high-index crystal planes reported in the literature are convex structures (Nanoscale, 2011, 3, 718-724; RSC Advances, 2012, 2, 6178-6184; Electrochimica Acta, 2012, 59, 81-85 .), while the concave structure of α-phase Fe2O3 with high-index facets has not been reported yet

Method used

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  • Preparation method of recessed alpha-phase ferric oxide cube
  • Preparation method of recessed alpha-phase ferric oxide cube
  • Preparation method of recessed alpha-phase ferric oxide cube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Weigh 0.8080g (about 2mmol) of iron nitrate (Fe(NO 3 ) 3 9H 2 O), it was dissolved in 10 mL of deionized water, and 0.199 g (about 1 mmol) of copper acetate (Cu(CH 3 COO) 2 ·H 2 O), stir well to dissolve. Add 0.15 g of polyvinylpyrrolidone (average molecular weight: 40,000) to the above solution, and dissolve it by ultrasonication.

[0019] (2) Add 10 mL of ammonia water with a mass fraction of 25% to the solution obtained in step (1), and mix thoroughly after ultrasonication for 3 minutes.

[0020] (3) Add 2mL of formamide (analytical grade) to the solution obtained in step (2), then transfer to a 50mL Teflon-lined stainless steel reaction kettle, seal and heat up to 160°C for 12h .

[0021] (4) 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 for 3 times, and dry the obtained product at 60°C for 12 hours to obtain α-phase ferric oxide ...

Embodiment 2

[0027] (1) Same as embodiment 1.

[0028] (2) Same as embodiment 1.

[0029] (3) Add 1mL of formamide (analytical grade) to the solution obtained in step (2), then transfer it to a 50mL Teflon-lined stainless steel reactor, seal it and raise the temperature to 150°C Keep warm for 36 hours.

[0030] (4) Same as embodiment 1.

Embodiment 3

[0032] (1) Weigh 0.54g (about 2mmol) of ferric chloride (FeCl 3 ·6H 2 O), it was dissolved in 20 mL of deionized water, and 0.5 g (about 2 mmol) of copper sulfate (CuSO 4 ·5H 2 O), stir well to dissolve. 0.1 g of polyvinylpyrrolidone (average molecular weight: 55,000) was added to the above solution, and dissolved by ultrasonication.

[0033] (2) Add 20mL of ammonia water with a mass fraction of 25% to the solution obtained in step (1), and mix thoroughly after ultrasonication for 3 minutes.

[0034] (3) Add 2 mL of formamide (analytical grade) to the solution obtained in step (2), then transfer it to a 100 mL Teflon-lined stainless steel reaction kettle, seal it and raise the temperature to 160 °C Keep warm for 24 hours.

[0035] (4) Same as embodiment 1.

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Abstract

The invention discloses a preparation method of a recessed alpha-phase ferric oxide cube, relating to an inorganic nonmetallic material. The invention provides a preparation method of a recessed alpha-phase ferric oxide cube with a high-index crystal face. The preparation method comprises the following steps of (1) preparing a water-soluble ferric salt solution, then, sequentially adding cupric salt and polyvinyl pyrrolidone (PVP), and carrying out ultrasound treatment to enable the cupric salt and the polyvinyl pyrrolidone to dissolve to obtain a solution A, wherein the ferric salt has the molar concentration of 0.05-0.2M after stirring; (2) adding ammonium hydroxide into the solution A obtained in the step (1), and carrying out ultrasound treatment to obtain a solution B; and (3) adding formamide into the solution B obtained in the step (2), then, transferring the solution B into a reaction kettle, sealing the reaction kettle and heating to react, then, cooling to the room temperature, centrifugally separating precipitates at the bottom of the kettle, washing the precipitates, and then, drying the obtained product to obtain the recessed alpha-phase ferric oxide cube. The preparation method is mild in condition and simple in process; and the synthesized particles are uniform in size and distribution and have high-index crystal faces.

Description

technical field [0001] The invention relates to an inorganic non-metallic material, in particular to a method for preparing an alpha-phase ferric oxide concave cube with a high-index crystal plane. Background technique [0002] α-phase ferric oxide is an important metal oxide, which has the characteristics of n-type semiconductor. Its bandgap width is 2.2eV, and it has strong absorption in the visible light region. , electronics, magnetic recording materials, catalysts and biomedical engineering have a wide range of applications. In addition, due to its high gas sensitivity, ferric oxide can also be used to detect combustible and toxic gases in the air. [0003] The size, shape, and structure of materials have a great influence on their related properties. Related literatures have reported Fe2O3 with different dimensions, shapes and structures, such as nanorods, nanotubes, nanorings, hollow microspheres, etc. In addition, some structures with high-index crystal faces have...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/06
Inventor 王周成梁汉锋王世强
Owner XIAMEN UNIV
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