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Monodisperse spindle-shaped nanosheets and preparation method thereof

A nanosheet and monodisperse technology, applied in the nanometer field, can solve the problems of poor dispersibility and uniformity, low product purity, and difficult shape control, and achieves good monodispersity and uniformity, and cheap and easy-to-obtain raw materials. , the preparation process is simple and easy to implement

Active Publication Date: 2017-03-22
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the air oxidation method used in the above method, the purity of the product is not high, the dispersion and uniformity of the obtained sheet are not good, the agglomeration is serious, and the shape is not easy to control

Method used

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  • Monodisperse spindle-shaped nanosheets and preparation method thereof
  • Monodisperse spindle-shaped nanosheets and preparation method thereof
  • Monodisperse spindle-shaped nanosheets and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 5mmol FeCl 3 ·6H 2 O. Add 40 mL of ethylene glycol and 0.5 g of polyethylene glycol (PEG) 2000 to the Teflon liner and stir magnetically for 30 min. Add 10mmol of ethylenediamine (the ratio of alkali to metal salt substance is 2) into the inner liner, mix and stir for 2.0 hours. Finally, put the inner liner in a stainless steel kettle and react at 200°C for 12 hours, and then wash it by centrifugation after cooling (centrifuge and wash three times with water and ethanol respectively, the centrifugation rate is 5000 rpm, and the centrifugation time is 3 minutes each time). Dry at 60°C for 6h to obtain the desired monodisperse nanosheets. The resulting product is bright yellow, and the phase of the product, infrared spectrum, morphology observed under the scanning electron microscope and transmission electron microscope, and the selected area electron diffraction spectrum are as follows: Figure 1-4 shown. According to the literature [Adv.Funt.Mater.2010,20,1680; J.Am...

Embodiment 2

[0042] The steps are the same as in Example 1, but the reaction temperature is 150°C. The resulting product is bright yellow, and the morphology observed under the scanning electron microscope is as follows: Figure 6 As shown, it can be seen that the product is a glycolate polycrystalline fusiform nanosheet of iron, with a major axis length of 34-59 nm and an average length of 48 nm; the ratio of the major axis to the minor axis is 1.52-2.72, with an average of 2.02.

Embodiment 3

[0044] The steps are the same as in Example 1, but the reaction temperature is 180°C. The resulting product is bright yellow, and the morphology observed under the scanning electron microscope is as follows: Figure 7 As shown, it can be seen that the product is a glycolate polycrystalline shuttle-shaped nanosheet of iron, with a major axis length of 132-178 nm and an average length of 153 nm; the ratio of its major axis to minor axis is 1.86-2.17, an average of 2.05, and a thickness of 33 nm. ~37nm, with an average thickness of 34nm.

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Abstract

The present invention relates to mono-dispersed fusiform nano-sheets and a preparation method thereof. According to the present invention, the fusiform nano-sheets are a polycrystalline structure formed by aggregating nano-crystal, the composition is a divalent and trivalent iron bimetallic layered glycollate [the structural formula is represented as the follow], a solvothermal method is used to change the temperature, the time, the amount ratio of the alkali to the metal salt substance, the alkali type, and the concentration of the doped metal ions so as to regulate the size of the fusiform nano-sheets (the long axis is 48-578nm, the ratio of the long axis to the short axis is 1.50-2.79, and the thickness is 11-51 nm); iron glycollate nano-sheets are subjected to a heat treatment for 1-3 h under a 300-500 DEG C air atmosphere to obtain the porous gamma-Fe2O3 nano-sheets; and the obtained nano-sheets of the prevent invention have characteristics of mono-dispersion property, good uniformity, adjustable size, adjustable composition and the like, and have wide application prospects in the fields of catalyst, inorganic pigments, water treatment, magnetic record materials, electrode materials, sensors, biomedical engineering, and the like.

Description

technical field [0001] The invention relates to the field of nanotechnology, in particular to a simple and controllable method for preparing monodisperse shuttle-shaped nanosheets. Background technique [0002] Iron oxide is an important semiconductor oxide material, which has many excellent properties (such as good weather resistance and light resistance, good magnetic properties, and good ultraviolet absorption and shielding properties), so it can be used in inorganic pigments, catalysts, It has a wide range of applications in water treatment, magnetic recording materials, electrode materials, sensors, and biomedical engineering. Therefore, the research on the controllable preparation and physical and chemical properties of iron oxide nanostructure materials has very important scientific significance, and has received extensive attention from researchers at home and abroad. [0003] Nanosheet is a new type of nano functional material with special structure and performance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/70C07C31/28C01G49/06B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G49/06C01P2004/20C07B2200/13C07C29/70C07C31/28
Inventor 童国秀刘云崔婷婷吴文华李亚娜
Owner ZHEJIANG NORMAL UNIVERSITY
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