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Flowerlike alpha-FeOOH porous micro-nanospheres and preparation method thereof

A technology of micro-nano balls and flower-shaped balls, which is applied in the field of nanomaterials, can solve the problems of low specific surface area and inability to catalyze degradation applications, and achieve the effects of high specific surface area, easy control of product composition, and less by-products

Active Publication Date: 2017-02-22
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The α-FeOOH prepared by these methods has a wide particle size distribution and a low specific surface area. Therefore, they cannot be better used in electrode materials, high-density magnetic recording materials, sensitive components and catalytic degradation of organic pollutants.

Method used

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  • Flowerlike alpha-FeOOH porous micro-nanospheres and preparation method thereof
  • Flowerlike alpha-FeOOH porous micro-nanospheres and preparation method thereof
  • Flowerlike alpha-FeOOH porous micro-nanospheres and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method of flower-like α-FeOOH porous micro-nanosphere comprises the steps:

[0028] (1) Prepare light yellow solution a with 50ml of deionized water and 50ml of N,N-dimethylformamide (DMF), pH 4.5.

[0029] (2), then weigh the Fe of 0.014g 2 SO 4 ·7H 2 O was dissolved in solution a, and a deep yellow solution b with a volume of 100 ml was obtained after stirring for 1 minute and ultrasonic dispersion.

[0030] (3) Put solution b into a constant temperature drying oven, and heat-treat at 40° C. for 5 hours to obtain solution c and precipitate d.

[0031] (4) The precipitate d was collected by centrifugation, ultrasonically cleaned with deionized water and absolute ethanol, and finally dried to obtain the brown target product, namely flower-shaped α-FeOOH porous micro-nanospheres.

[0032] figure 1 It is the XRD spectrum pattern of the product obtained in Example 1. Compared with the standard α-FeOOH spectrum (JCPDS: 29-0713), the obtained product is...

Embodiment 2

[0036] The preparation method of flower-like α-FeOOH porous micro-nanosphere comprises the steps:

[0037] (1) Prepare light yellow solution a with 40ml of deionized water and 60ml of N,N-dimethylformamide (DMF), pH 4-5.

[0038] (2), then weigh 0.010g of Fe 2 SO 4 ·7H 2 O was dissolved in solution a, and a dark yellow solution b with a volume of 100 ml was obtained after 3 minutes of stirring and ultrasonic dispersion.

[0039] (3) Put solution b into a constant temperature drying oven, and heat-treat at 35° C. for 6 hours to obtain solution c and precipitate d.

[0040] (4) The precipitate d was collected by centrifugation, ultrasonically cleaned with deionized water and absolute ethanol, and finally dried to obtain the brown target product, namely flower-shaped α-FeOOH porous micro-nanospheres.

Embodiment 3

[0042] The preparation method of flower-like α-FeOOH porous micro-nanosphere comprises the steps:

[0043] (1) Prepare light yellow solution a with 55ml of deionized water and 45ml of N,N-dimethylformamide (DMF), pH 4-5.

[0044] (2), then weigh 0.020g of Fe 2 SO 4 ·7H 2 O was dissolved in solution a, and a deep yellow solution b with a volume of 100 ml was obtained after 5 minutes of stirring mixing and ultrasonic dispersion.

[0045] (3) Put solution b into a constant temperature drying oven, and heat-treat at 45° C. for 4 hours to obtain solution c and precipitate d.

[0046] (4) The precipitate d was collected by centrifugation, ultrasonically cleaned with deionized water and absolute ethanol, and finally dried to obtain the brown target product, namely flower-shaped α-FeOOH porous micro-nanospheres.

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Abstract

The invention provides flowerlike alpha-FeOOH porous micro-nanospheres and a preparation method thereof, and relates to the technical field of nano materials. The preparation method comprises the following steps: firstly, dissolving Fe2SO4.7H2O in a mixed system of water and N,N-dimethylfomamide (DMF), and then performing heat treatment and a hydrolytic reaction to obtain the flowerlike alpha-FeOOH porous micro-nanospheres. The flowerlike alpha-FeOOH porous micro-nanospheres are formed by assembling mono-crystalline flowerlike spheres of which the spherical diameter is 2[mu]m, and the specific surface area of the porous micro-nanospheres is 258m<2> / g. The flowerlike alpha-FeOOH porous micro-nanospheres provided by the invention are obtained by virtue of a hydrolysis precipitation method, and are specifically obtained by preparing deionized water and DMF into a solution, then adding Fe2SO4.7H2O to perform a hydrolytic reaction, and raising the reaction temperature to about 40 DEG C to promote the reaction, so that the yield of the product is increased and the crystal morphology cannot be changed; and by virtue of ultrasonic washing, the flowerlike alpha-FeOOH porous micro-nanospheres with uniform particle size distribution, high surface activity and good adsorptivity are obtained.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a flower-shaped α-FeOOH porous micro-nano ball and a preparation method thereof. Background technique [0002] Goethite (α-FeOOH), as a widely distributed iron oxide, usually has acicular, columnar and flaky crystal shapes. As a commonly used yellow inorganic pigment, it has been used in water-based paints and oil-based paints, and it is an important raw material for the preparation of electrode materials, electromagnetic wave shielding and absorbing materials, high-density magnetic recording materials, and high-quality sensitive components. Meanwhile, α-FeOOH also plays an important role in the removal of heavy metal ions and the decomposition of organic pollutants. [0003] The preparation methods of α-FeOOH have been reported to include chemical precipitation method, hydrothermal synthesis method, air oxidation method and sol-gel method. The α-FeOOH prepared by the abo...

Claims

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Application Information

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IPC IPC(8): C01G49/02B82Y40/00
CPCC01G49/02C01P2002/72C01P2004/03C01P2004/04C01P2004/32C01P2004/61C01P2006/12
Inventor 韩成良吴桐王肖谢劲松丁明
Owner HEFEI UNIV
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