Method for preparing Nano tube of lanthanum hydroxide, and Nano tube of lanthanum oxide

Abstract

This invention relates to a method for preparing lanthanum hydroxide and lanthanum oxide nanotubes. The method comprises: (1) mixing 0.1-2 mol of water-soluble lanthanum salt and 1-20 mol of urea, and dissolving into water; (2) reacting at 50-120 deg.C for 0.1-168 h, cooling to room temperature, and filtering to obtain the precipitate; (3) washing with deionized water, and drying at 80-90 deg.C to obtain white powder of lanthanum hydroxide nanotubes; (4) calcining the lanthanum hydroxide nanotubes at 200-900 deg.C for 0.5-8 h, and cooling to room temperature to obtain lanthanum oxide nanotubes. The method has such advantages of simple process and high suitability for industrial production. The lanthanum hydroxide and lanthanum oxide nanotubes have potential applications in such fields as semiconductors, displays, high performance ceramics and catalysts.

Description

technical field [0001] The invention relates to a preparation method of lanthanum hydroxide nanotubes and lanthanum oxide nanotubes, and belongs to the technical field of inorganic material preparation techniques. Background technique [0002] Rare earth compounds are widely used in optical materials, electronic materials, magnetic materials, catalysis, high-performance ceramics, medicine, etc., and are essential components of many functional materials with excellent magnetic and optical properties. Since my country is the largest rare earth country in the world, and its proven industrial reserves are the largest in the world, the rare earth industry has become one of the important chemical industries in my country. In the past ten years, it has been found that when the size of the material reaches the nanoscale, properties different from those of bulk materials often appear, such as the enhancement of fluorescence properties. Therefore, the synthesis and properties of new ...

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Problems solved by technology

[0003] At present, research at home and abroad focuses on the preparation of oxide nanoparticles (Y.Hasegaw et al., Angew.Chem.Int.Ed.2002, 41, 2073.), the preparation of sulfur oxide rare earth nanocrystals (Y.D.Li et al., Inorg.Chem ., 2000, 39, 3418.), and some rare earth oxides, hydroxide nanotubes (Y.-P.Fang et al. Adv.Funct.Mater.2003, 13(12), 955-960.) etc. research, but the preparation methods of rare earth n