Preparation of pure monoclinic phase thorny-sphere-like lanthanum carbonate oxide (La2O2CO3) three-dimensional multi-stage structure

A technology of lanthanum oxycarbonate and spiny spherical shape, which is applied in the field of preparation of three-dimensional multi-level structure of thorny spherical lanthanum oxycarbonate, which can solve the problems of limiting material in-depth research, low stability, and increasing the difficulty of pure crystal phase

Inactive Publication Date: 2014-11-05
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(Journal of Crystallographic and Spectroscopic Research, 1982, 12(2), 157-170.) Among them, type II-RE having a structure similar to oxides of rare earth elements 2 o 2 CO 3 Compared with rare earth oxysalts such as oxyhalides, silicon oxysalts, oxysulfides, and molybdenum oxysalts, type I and type Ia-REs have similar structures 2 o 2 CO 3 The stability is lower, which increases the preparation of type I and type Ia-RE 2 o 2 CO 3 Difficulty in pure crystalline phases, thus limiting type I and type Ia-RE 2 o 2 CO 3 in-depth study of materials

Method used

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  • Preparation of pure monoclinic phase thorny-sphere-like lanthanum carbonate oxide (La2O2CO3) three-dimensional multi-stage structure
  • Preparation of pure monoclinic phase thorny-sphere-like lanthanum carbonate oxide (La2O2CO3) three-dimensional multi-stage structure
  • Preparation of pure monoclinic phase thorny-sphere-like lanthanum carbonate oxide (La2O2CO3) three-dimensional multi-stage structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: 1% Tb doped-Type Ia-RE 2 o 2 CO 3 preparation of

[0018] First, measure 9.9mL of 0.2M La(NO 3 ) 3 and 0.1 mL of 0.1M Tb(NO 3 ) 3 (Tb 4 o 7 Dissolve in 3M nitric acid solution to prepare) solution, then add 0.2g of EDTA therein, and stir for 5-10min; take 1.5g of urea, dissolve it with 20mL of water to obtain an aqueous solution of urea, and add the aqueous urea solution dropwise to In the above solution; after adjusting the pH value of the reaction solution to 10 with concentrated ammonia water, stir at room temperature for 2 hours; transfer the obtained reaction solution to a 50mL autoclave, and react at 180°C for 2 hours; 3 The OH precursor product was washed several times with water and ethanol, dried at 60°C and recovered for use; the recovered sample was calcined in a tube furnace at 450°C for 3 hours (heating rate 2°C / min) to obtain the final product .

Embodiment 2

[0019] Example 2: 1% Tb doped-La 2 o 3 preparation of

[0020] First, measure 9.9mL of 0.2M La(NO 3 ) 3 and 0.1 mL of 0.1M Tb(NO 3 ) 3 (Tb 4 o 7 Dissolve in 3M nitric acid solution to prepare) solution, then add 0.2g of EDTA therein, and stir for 5-10min; take 1.5g of urea, dissolve it with 20mL of water to obtain an aqueous solution of urea, and add the aqueous urea solution dropwise to In the above solution; after adjusting the pH value of the reaction solution to 10 with concentrated ammonia water, stir at room temperature for 2 hours; transfer the obtained reaction solution to a 50mL autoclave, and react at 180°C for 2 hours; 3 The OH precursor product was washed several times with water and ethanol, dried at 60°C, and recovered for use; the recovered sample was placed in a tube furnace for calcination at 750°C for 3 hours (the heating rate was 2°C / min) to obtain the final product .

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Abstract

The invention provides a preparation method of a pure monoclinic phase thorny-sphere-like lanthanum carbonate oxide (La2O2CO3) three-dimensional multi-stage structure. A LaCO3OH three-dimensional structure, referred from references, is employed as a raw material and is subjected to high-temperature calcination to prepare the thorny-sphere-like lanthanum carbonate oxide (La2O2CO3) three-dimensional multi-stage structure. The compound can be used as a substrate material of a luminescent material.

Description

technical field [0001] The invention belongs to the field of nano material preparation. Specifically related to spiny spherical lanthanum oxycarbonate (La 2 o 2 CO 3 ) Preparation of three-dimensional hierarchical structures. Background technique [0002] Three-dimensional multi-level structures are usually assembled by nanowires, nanobelts, nanotubes, nanoplates or nanoparticles, which not only has the performance of its secondary unit, but also greatly improves its performance, and even obtains some new performance. Due to their potential applications in optics, catalysis, biomarkers, water treatment, lithium batteries, and photodegradation, 3D hierarchical structures are attracting more and more attention, especially from optical researchers. However, it is still very challenging to develop a simple and practical method for preparing materials with specified chemical composition and crystal phase with three-dimensional hierarchical structure. [0003] Oxycarbonates ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00C30B29/22C30B29/60
Inventor 侯文华杨晓燕
Owner NANJING UNIV
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