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Multi-element composite metal oxide hollow nanosphere and preparation method thereof

A composite metal and oxide technology, applied in the direction of alkali metal oxide/hydroxide, alkali metal compound, metal/metal oxide/metal hydroxide catalyst, etc. Problems such as the inheritance of the composition of the hollow sphere and the pollution of the methanol solution to the environment have achieved the effects of universality, low cost, and controllable ratio

Inactive Publication Date: 2012-09-19
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the methanol solution used in the synthesis process of the hydrotalcite pollutes the environment, and it does not systematically discuss the composition inheritance between the hydrotalcite precursor and the oxide hollow spheres.

Method used

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  • Multi-element composite metal oxide hollow nanosphere and preparation method thereof
  • Multi-element composite metal oxide hollow nanosphere and preparation method thereof
  • Multi-element composite metal oxide hollow nanosphere and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A. Use deionized water to prepare Ni(NO 3 ) 2 ·6H 2 O, ZnCl 2 and Al(NO 3 ) 3 9H 2 O metal salt solution in which ZnCl 2 , Ni(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 The molar concentration of O is 0.1mol / L; then use deionized water to prepare NaOH with a molar concentration of 0.15mol / L and NaOH with a molar concentration of 0.013mol / L. 2 CO 3 Mix the alkaline solution; pour the above-mentioned mixed salt solution and the alkaline solution into a full-return mixed liquid membrane reactor with a rotation speed of 3000 rpm at the same time at a volume ratio of 1:4, and stir vigorously for 15 minutes; centrifuge and wash the precipitate with deionized water to remove excess acid ions and metal ions; disperse the precipitate in deionized water to prepare a suspension with a mass percentage of 0.07, and add it to a stainless steel autoclave lined with polytetrafluoroethylene, at 100 ° C , hydrothermal reaction for 10 hours, and then naturally cooled to room temp...

Embodiment 2

[0031] A. Prepare ZnCl-containing solution with deionized water 2 and Al(NO 3 ) 3 9H 2 O metal salt solution in which ZnCl 2 The molar concentration of Al(NO 3 ) 3 9H 2 The molar concentration of O is 0.1mol / L; then use deionized water to prepare a NaOH solution with a molar concentration of 0.2mol / L; pour the above mixed salt solution and alkaline solution at a volume ratio of 1:4 at a speed of 4000 rpm In a fully back-mixed liquid membrane reactor per minute, stir vigorously for 10 minutes; centrifuge and wash the precipitate with deionized water to remove excess acid radical ions and metal ions; disperse the precipitate into deionized water to prepare a mass percentage of 0.06 The suspension was added into a stainless steel autoclave lined with polytetrafluoroethylene, hydrothermally reacted at 140°C for 6 hours, and then naturally cooled to room temperature to obtain the product Zn 3 Al-Cl hydrotalcite colloidal solution.

[0032] B. Use an electronic balance to we...

Embodiment 3

[0035] A. Prepare CoCO-containing solution with deionized water 3 and FeCl 3 ·6H 2 O metal salt solution in which CoCO 3 The molar concentration is 1.2mol / L, FeCl 3 ·6H 2 The molar concentration of O is 0.6mol / L; then use deionized water to prepare NaOH with a molar concentration of 0.9mol / L and NaOH with a molar concentration of 0.24mol / L. 2 CO 3 Mix the alkaline solution; pour the above-mentioned mixed salt solution and the alkaline solution into a fully back-mixed liquid membrane reactor with a rotation speed of 5000 rpm at the same time according to the volume ratio of 1:4, and stir vigorously for 5 minutes; centrifuge and wash the precipitate with deionized water to remove excess acid ions and metal ions; disperse the precipitate in deionized water to prepare a suspension with a mass percentage of 0.05, and add it to a stainless steel autoclave lined with polytetrafluoroethylene, at 120 ° C , hydrothermal reaction for 8 hours, and then naturally cooled to room tempe...

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Abstract

The invention relates to multi-element composite metal oxide hollow nanospheres and a preparation method thereof. The method comprises the following steps of dispersing carbon spheres in a hydrotalcite colloidal solution, allowing hydrotalcite flakes to be adsorbed on the surface of the carbon spheres by the action of electrostatic attraction, removing the supernatant containing non-adsorbed hydrotalcite flakes by centrifugal separation to obtain a pure hydrotalcite-coated carbon sphere material, and then calcining to obtain multi-element composite metal oxide hollow nanospheres which have uniform size and controllable metal element proportions. The general formula of the hollow nanospheres is MIIO / MIII2O3, wherein MII represents bivalent metal cations, MIII represent trivalent metal cations; and the specific surface area of the hollow nanospheres is 140 to 240 m<2> / g. The multi-element composite metal oxide hollow nanospheres have good application prospects in the fields of catalysis, adsorption and sustained release drug delivery.

Description

technical field [0001] The invention relates to a multi-component composite metal oxide nano hollow sphere with controllable metal ratio and a preparation method thereof, and belongs to the technical field of inorganic advanced nanometer material preparation technology. technical background [0002] Due to the advantages of low density and high specific surface area, inorganic nano hollow sphere materials have a wide range of applications in catalysis, adsorption and gas sensing, energy transfer, drug storage and release. The commonly used methods for synthesizing inorganic nano-hollow sphere materials include sol-gel method, emulsion / interfacial polymerization method, template method and so on. Among them, the most commonly used method is the template method, because this method is easy to operate, has high repeatability, and can obtain products with uniform size. Because carbon spheres have the characteristics of simple preparation process, high yield, good repeatability,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/28B01J20/20B82Y30/00B82Y40/00B01J23/80B01J23/06B01J23/75B01J23/755B01J23/02B01J35/08A61K47/04A61K47/02
Inventor 孙晓明杨淼森常铮雷晓东段雪
Owner BEIJING UNIV OF CHEM TECH
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