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Tubular clay mineral-magnetic metal nano composite and preparation method thereof

A technology of magnetic metal nano- and nano-composite materials, which is applied in the directions of non-metallic elements, chemical instruments and methods, silicon compounds, etc., to achieve the effects of simple process flow, uniform particle size and novel material structure.

Active Publication Date: 2013-12-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there is no report on the combination of tubular clay minerals and magnetic metal particles, especially the report that the magnetic metal particles are located in clay mineral nanotubes.

Method used

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Experimental program
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specific Embodiment approach

[0016] The invention provides a tubular clay mineral-magnetic metal nanocomposite material and a preparation method thereof. The specific implementation method comprises the following steps:

[0017] The first step of preparation is to remove impurities and crush the tubular clay minerals such as halloysite, palygorskite or sepiolite. Naturally occurring clay minerals contain quartz lamp impurities. The clay minerals are thoroughly cleaned with deionized water, dried after removing the impurities, and crushed to 50-2000 meshes by grinding or crushing to obtain high-purity, fine-grained Finer tubular clay minerals.

[0018] In the second step of preparation, the surface modification of the removed and crushed tubular clay minerals is carried out. The inside and outside of the nanotubes of natural clay minerals are both hydrophilic, so it is difficult for metal organics to enter the inside of the clay mineral nanotubes. Organic modification of clay minerals can make the inte...

Embodiment 1

[0024] 1) Wash the halloysite with deionized water, remove the impurities therein, and then dry it at 60°C to crush the product to 50 mesh;

[0025] 2) Take 100 grams of the product of step 1), add it to 1 liter of 10 g / L sodium dodecylbenzenesulfonate solution, mix and stir for 5 hours; filter the product, and dry it at 60 °C;

[0026] 3) Add 0.05 moles of manganese oleate into 0.1 liter of ethanol, mix and stir evenly; add the product obtained in step 2), mix and stir for 0.5 hours; dry the obtained product at 150 °C, place it in a furnace, and calcinate at 450 °C for 3 hours , followed by reduction in a nitrogen / hydrogen mixed atmosphere at 450 °C for 120 min; after cooling, take it out to obtain the halloysite-elemental manganese nanocomposite.

Embodiment 2

[0028] 1) Wash the palygorskite with deionized water, remove the impurities therein, and then dry it at 150°C to crush the product to 2000 mesh;

[0029] 2) Take 100 grams of the product of step 1), add it to 5 liters of 0.5 g / L cetyltrimethylammonium bromide solution, mix and stir to react for 0.5 hours; filter the product, and dry it at 150°C ;

[0030] 3) Add 0.5 moles of nickel oleate into 1 liter of acetone, mix and stir evenly; add the product obtained in step 2), mix and stir for 5 hours; dry the obtained product at 60 °C, place it in a furnace, and calcinate at 900 °C for 0.5 hours , followed by reduction in a nitrogen / hydrogen mixed atmosphere at 800 °C for 15 min; take it out after cooling, and obtain the palygorskite-elemental nickel nanocomposite.

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Abstract

The invention discloses tubular clay mineral-magnetic metal nano composite and a preparation method thereof. Magnetic metal nano particles are located in natural nano tubes of clay mineral. The preparation method includes: performing organic modification on the tubular clay mineral to allow the nano tubes of the clay mineral to be hydrophobic; mixing the tubular clay mineral with a certain proportion of metal organics; in-situ synthesizing metal oxide nano particles in the nano tubes of the clay mineral by means of high-temperature thermal decomposition; reducing metal oxide to obtain the tubular clay mineral-magnetic metal nano composite. The novel tubular clay mineral-magnetic metal nano composite has the advantages such as stable and novel structure, uniform particle size and worthiness of application and is potentially and widely applicable in fields such as degradation-resistant waste water treatment, electromagnetic wave absorption, drug carrier and sustained release preparation, and magnetic resonance imaging. The preparation method is simple in process flow.

Description

technical field [0001] The invention relates to a compound preparation method, in particular to a tubular clay mineral-magnetic metal nanocomposite material and a preparation method thereof. Background technique [0002] Tubular clay minerals refer to naturally occurring clay minerals with nanotubular structures (such as anvilite) or tunnel pore structures (such as palygorskite and sepiolite). The reserves of clay minerals are huge, and its main component is magnesium aluminum silicate, which is currently mainly used as pottery, paper-making fillers, and adsorbents. The nanotube or tunnel pore structure of tubular clay minerals endows them with high specific surface area, excellent catalytic activity, and serves as a template for the controllable preparation of functional materials. Magnetic metal nanoparticles include Fe, Ni, Co, Mn, Zn and their alloys, etc., which have broad application prospects. Due to its low density, high Curie temperature, good thermal stability, h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/40
Inventor 陈雪刚张奥博叶瑛刘舒婷闫康康
Owner ZHEJIANG UNIV
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