Preparation method of Mn doped lanthanum titanate photocatalyst fluorescent powder and application

A photocatalyst and phosphor technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of insignificant catalytic effect, low powder purity, fluorescence The problem of low brightness of powder, etc., achieves the effect of promoting the process of environmental pollution control and promotion

Inactive Publication Date: 2017-03-15
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on doping titanate with metal ions to improve its fluorescence and catalytic properties, and the powders prepared in the existing reports have low purity, low brightness of phosphor powders, and inconspicuous catalytic effects, etc. question

Method used

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  • Preparation method of Mn doped lanthanum titanate photocatalyst fluorescent powder and application
  • Preparation method of Mn doped lanthanum titanate photocatalyst fluorescent powder and application
  • Preparation method of Mn doped lanthanum titanate photocatalyst fluorescent powder and application

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A method for preparing Mn-doped lanthanum titanate photocatalyst fluorescent powder, comprising the following steps.

[0037] According to the general formula Mn x La 2-x TiO 5-0.5x (Where the stoichiometric ratio of x=(0.01, 0.02, 0.06, 0.1, 0.14, 0.2, 0.4) weigh xmmol manganese acetate (Mn(CH 3 COO) 2 , A.R.), weighed (2-x) mmol of lanthanum acetate (La(CH 3 COO) 3, A.R.), respectively dissolved in 50ml distilled water to prepare solution A; Weigh 0.5 (2-x) mmoL tetrabutyl titanate and dissolve them in 40mL ethanol, add 6ml nitric acid (38% concentrated nitric acid) dropwise, and dissolve completely Obtain solution B; slowly pour B into A, magnetically stir for 1h, 800r / min, to obtain precursor sol C; then put it in a constant temperature water bath at 70°C, heat for about 8h, and obtain a colloidal precipitate, that is, the precursor gel ;Add 10mL of absolute ethanol and 1g of citric acid to the precursor gel, continue to stir for 0.2h, then put it into an oven...

Embodiment 2

[0040] A method for preparing Mn-doped lanthanum titanate photocatalyst fluorescent powder, comprising the following steps.

[0041] According to the general formula Mn x La 2-x TiO 5-0.5x (Where the stoichiometric ratio of x=(0.02, 0.06, 0.1, 0.14, 0.4) weigh xmmol manganese acetate (Mn(CH 3 COO) 2 , A.R.), weighed (2-x) mmol of lanthanum acetate (La(CH 3 COO) 3 , A.R.), respectively dissolved in 40ml of distilled water to prepare solution A; weigh 0.5(2-x) tetrabutyl titanate and dissolve them in 50mL of ethanol, add 6ml of nitric acid (38% concentrated nitric acid) dropwise, and completely dissolve to obtain Solution B; slowly pour B into A, magnetically stir for 1h, 500r / min, to obtain precursor sol C; then put it in a constant temperature water bath at 70°C, heat for about 8h, and obtain a colloidal precipitate, that is, a precursor gel; Add 20mL of absolute ethanol and 1.5g of citric acid to the precursor gel, continue to stir for 0.5h, then put it into an oven, an...

Embodiment 3

[0044] A method for preparing Mn-doped lanthanum titanate photocatalyst fluorescent powder, comprising the following steps.

[0045] Weigh 1.99mmoL lanthanum carbonate, 0.01mmoL manganese carbonate dissolved in 45ml distilled water, stir well to obtain solution A; weigh 1mmoL tetrabutyl titanate and dissolve it in 30mL methanol, add dropwise 6ml nitric acid (38% concentrated nitric acid), completely Dissolve to obtain solution B; slowly pour B into A, magnetically stir for 1h, 800r / min, to obtain precursor sol C; then put it in a constant temperature water bath at 50°C, and heat for about 12h to obtain a colloidal precipitate, that is, the precursor sol gel; add 10mL ethanol and 1g citric acid to the precursor gel, and continue to stir for 0.3h; then put it into an oven, 90°C self-propagating reaction for 45min; keep it at 180°C for 2h, and finally put the precursor into a corundum crucible, Put it into a muffle furnace, and calcined at 800° C. for 3.5 hours to obtain a photoc...

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Abstract

The invention belongs to the technical field of photocatalyst materials, particularly relates to a preparation method of Mn doped lanthanum titanate photocatalyst fluorescent powder and an application. The chemical formula of the photocatalyst fluorescent powder is MnxLa (2-x) TiO5-0.5x, wherein 0.01<=x<=0.4. The preparation method includes the steps: firstly preparing lanthanum titanate gel, doping manganese ions, and synthesizing corresponding powder at the lower temperature by the aid of a self-propagating combustion method; determining that the power has optimal photocatalytic performance when Mn doping amount is 10%, and the power has highest luminescence property when Mn doping amount is 3% according to photocatalytic effect and luminescent intensity. The preparation method is simple in process, easy to operate and low in calcination temperature, conditions are mild and easy to control, prepared samples are high in purity and yield, and the fluorescent powder is a novel rare earth composite material with photocatalysis and fluorescence performances.

Description

technical field [0001] The invention belongs to the technical field of photocatalyst materials, and in particular relates to a preparation method and application of Mn-doped lanthanum titanate photocatalyst fluorescent powder. Background technique [0002] Photocatalytic materials are a type of semiconductor material that can induce oxidation-reduction reactions under the action of light. It can use solar energy to convert water into hydrogen energy and degrade organic pollutants in the environment. It has low cost, high efficiency and no secondary Secondary pollution and other advantages. Photocatalytic technology, as an emerging modern green technology, has attracted more and more attention for its application prospects in environmental pollution and energy regeneration. Currently, TiO 2 (P25) is the most common photocatalytic material, its band gap is 3.2eV, and it only responds in the ultraviolet spectral range. The energy in the ultraviolet region with a wavelength b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34C09K11/78C02F1/30
CPCB01J23/34B01J35/004C02F1/30C02F2305/10C09K11/7701
Inventor 尤俊华张杭州郭耀祖曲迎东李荣德郭瑞刘宣文
Owner SHENYANG POLYTECHNIC UNIV
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