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Preparation method of particle spherical lanthanum titanate

A lanthanum titanate, spherical technology, applied in the field of titanate, can solve the problems of harsh conditions, complex process, high temperature calcination, etc., and achieves the effect of simple method, cheap and easy-to-obtain raw materials, and favorable for mass production

Active Publication Date: 2017-10-03
HEBEI UNIV OF TECH
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing granular spherical lanthanum titanate in view of the disadvantages of complex process, harsh conditions and high cost in the current lanthanum titanate synthesis process, or the shortcomings of high-temperature calcination in the lanthanum titanate synthesis process

Method used

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  • Preparation method of particle spherical lanthanum titanate
  • Preparation method of particle spherical lanthanum titanate

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Experimental program
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Embodiment 1

[0025] (1) Dissolve 0.8ml butyl titanate (about 0.0023mol) in 40ml ethylene glycol solution, stir well, and set aside;

[0026] (2) Dissolve 1 g (about 0.0023 mol) of lanthanum nitrate hexahydrate in 20 ml of deionized water, stir until completely dissolved, and set aside;

[0027] (3) Under stirring conditions, add the liquid prepared in step (2) into the reactor in step (1) for 50 to 60 seconds, and after the solution is evenly mixed, add 2.4 g of sodium hydroxide and stir magnetically 30 minutes;

[0028] (4) Then move the mixture obtained in step (3) to the reactor, heat up to 220°C after airtight, and react for 24 hours;

[0029] (5) Leave the stock solution at room temperature, remove the supernatant, add the remaining precipitated part into a reactor containing 100ml, 0.2mol / L hydrochloric acid solution, stir for 30 minutes, wash with water, and then centrifuge for 80 ℃ drying, the obtained white powder is about 1.1 g of granular spherical lanthanum titanate.

[0030...

Embodiment 2

[0032] The reaction temperature in the step (4) in the embodiment 1 is set as 180 ℃, and other steps are the same as the embodiment 1. Obtain product with embodiment 1.

Embodiment 3

[0034] The reaction temperature in step (4) in embodiment 1 is set as 200 ℃, and other steps are the same as embodiment 1. Obtain product with embodiment 1.

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Abstract

The invention provides a preparation method of particle spherical lanthanum titanate. The method comprises the following steps: under a stirring condition, adding 10 to 20 parts of a lanthanum source-water mixed solution into 40 to 50 parts of a titanium source-alcohol mixed solution; adding sodium hydroxide into the solution and magnetically stirring for 20min to 30min; then transferring a mixture into a reaction kettle and raising the temperature to 180 DEG C to 220 DEG C; reacting for 3h to 48h; standing to room temperature; after removing supernatant, adding a sediment part into a reactor containing 100 parts of a hydrochloric acid solution; after stirring for 20min to 30min, washing with water; centrifugally separating; drying at 60 DEG C to 100 DEG C to obtain white powder, namely the particle spherical lanthanum titanate. The method provided by the invention has the advantages of simple process, low cost, uniform components and a novel shape.

Description

technical field [0001] The technical scheme of the present invention relates to a lanthanum titanate, specifically a method for preparing granular spherical lanthanum titanate. Background technique [0002] The chemical formula of lanthanum titanate is LaTiO 3 , belongs to ABO 3 Perovskite structure materials can not only be used to make ferroelectric gate field effect transistors, ferroelectric random access memories, etc., but also have applications in photocatalysis and treatment of sewage containing toxic organic substances. [0003] At present, there are many studies on lanthanum titanate, but most of the synthesis methods are not simple. (B. Madhavan, A. Ashok, Dielectric properties of A and B-site doped LaTiO 3-δ perovskites synthesized by sol–gel method, J Sol-Gel Sci Technol, 2015, 73, 1-8) This document reports a sol-gel synthesis method, which is time-consuming and cumbersome. (I.A.Mkhalid,Visible light photocatalyticsynthesis of aniline with an Au / LaTiO 3 n...

Claims

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Application Information

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IPC IPC(8): C01G23/00
CPCC01G23/003C01P2002/72C01P2004/03C01P2004/04C01P2004/32C01P2004/62C01P2004/64
Inventor 齐峰刘超张军
Owner HEBEI UNIV OF TECH
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