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Method for preparing aluminum-cerium dual-component hydrosol

A hydrosol, two-component technology, applied in chemical instruments and methods, nanostructure manufacturing, alumina/aluminum hydroxide, etc., to achieve the effect of optimizing oxygen buffering capacity

Inactive Publication Date: 2012-08-22
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method of aluminum and cerium two-component hydrosol is rarely reported, especially the preparation method of aluminum and cerium two-component nano-hydrosol

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of method for preparing nano aluminum cerium sol of the present invention, its processing step is as follows:

[0029] (1) with CeCl 3 ·7H 2 O makes 600ml of a solution with a concentration of 0.20mol / l, and adds AlCl thereto according to the molar ratio of Al:Ce=0.25:1 3 ·6H 2 O, after dissolving, a colorless and transparent solution was obtained. Under vigorous stirring, pour 60ml of concentrated ammonia water into the solution, so that the solution instantly turns into a powdery white jelly.

[0030] (2) Quickly add 30ml of hydrogen peroxide to make the white jelly-like substance into a maroon high-viscosity suspension.

[0031] (3) Heat and boil the obtained suspension until the suspension fades to light yellow and its viscosity is greatly reduced.

[0032] (4) Under stirring, slowly add dilute hydrochloric acid with a concentration of 2.00 mol / l dropwise while hot to peptize the slurry, so that it gradually turns into a yellow-green transparent sol, and...

Embodiment 2

[0036] A kind of method for preparing nano aluminum cerium sol of the present invention, its raw material and process step are similar to embodiment 1, but in step (1) according to the molar ratio of Al: Ce=0.11: 1 to CeCl 3 AlCl was added to the solution 3 ·6H 2 O, step (4) peptize the slurry with dilute hydrochloric acid with a concentration of 1.00 mol / l, so that it gradually turns into a yellow-green transparent sol.

[0037] The pH value of the sol prepared in this embodiment is 1.24, the sol-state aluminum accounts for 29.8% of the total aluminum moles, and the sol-state cerium accounts for 98.2% of the total cerium moles.

Embodiment 3

[0039] A kind of method for preparing nano aluminum cerium sol of the present invention, its raw material and process steps are similar to embodiment 1, but in step (1) according to the molar ratio of Al: Ce=0.43: 1 to CeCl 3 AlCl was added to the solution 3 ·6H 2 O, step (4) peptize the slurry with dilute hydrochloric acid with a concentration of 3.00 mol / l, so that it gradually turns into a yellow-green transparent sol.

[0040] The pH value of the sol prepared in this embodiment is 1.96, the sol-state aluminum accounts for 20.2% of the total aluminum moles, and the sol-state cerium accounts for 97.4% of the total cerium moles.

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Abstract

The invention relates to a method for preparing dual-component hydrosol with a dispersed-phase aluminum component of boehmite nanometer crystal grains and a cerium component of cerianite nanometer crystal grains, and belongs to the field of inorganic nanometer materials. The method comprises the following steps of: adding alkali into mixed solution of Al3+ and Ce3+ salts to co-precipitate two kinds of metal ions; adding an oxidizing agent to oxidize Ce(OH)3 in the precipitate into overoxidation hydroxide of Ce4+; performing thermal decomposition on the overoxidation hydroxide of Ce4+ in the precipitate to form Ce(OH)4 (cerium hydroxide (IV)); and adding acid to peptize the precipitate to prepare boehmite-cerianite sol. The clear boehmite-cerianite dual-component hydrosol can be prepared by the method, and the dispersed phase of the hydrosol consists of nanometer crystal grains; and the crystal grains are not agglomerated and are uniform in size, and the size is generally 3 nanometers.

Description

technical field [0001] The present invention relates to a kind of aluminum, cerium two-component aqueous sol, especially a kind of dispersed phase aluminum component is gamma-AlOOH (boehmite) nanocrystal, cerium component is CeO 2 (in CeO 2 The only crystalline phase of the pericite phase appears) the preparation method of the nanocrystalline two-component hydrosol, that is, the nano-boehmite-perissite two-component hydrosol (for the sake of brevity, the boehmite- When the two-component hydrosol of pericite is referred to as "alumina cerium sol") wet chemical preparation method. The invention belongs to the field of inorganic nanometer materials. Background technique [0002] In terms of the sol preparation technology related to the present invention, most of the literature reports focus on the preparation of a single boehmite sol. Since the coarse-grained pericite precipitates are difficult to peptize, it is difficult to prepare stable CeO 2 Hydrosol. The prior art in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/02C01F17/00B82B3/00
Inventor 张其春段有鹏王学彩叶巧明李纲
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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