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a kind of lafe 1-x cu x o 3 Perovskite material and preparation method

A perovskite material, C6H8O7·H2O technology, applied in catalyst activation/preparation, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem of low self-use rate of rare earths, achieve high self-stability, The effect of ensuring water quality safety and improving water quality

Active Publication Date: 2020-07-07
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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Problems solved by technology

my country's rare earth reserves and output both rank first in the world, but the rare earth self-use rate is low

Method used

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  • a kind of lafe <sub>1-x</sub> cu <sub>x</sub> o <sub>3</sub> Perovskite material and preparation method
  • a kind of lafe <sub>1-x</sub> cu <sub>x</sub> o <sub>3</sub> Perovskite material and preparation method
  • a kind of lafe <sub>1-x</sub> cu <sub>x</sub> o <sub>3</sub> Perovskite material and preparation method

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preparation example Construction

[0025] The invention discloses a perovskite material that can be used for activating persulfate to treat residual atrazine in water and a preparation method. The present invention specifically comprises the following steps:

[0026] Step 1, weigh a certain amount of La(NO 3 ) 3 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O, Cu(NO 3 ) 2 ·3H 2 O and C 6 h 8 o 7 ·H 2 O, add water to dissolve, and stir for 2 hours under the condition of heating in a water bath at 85-95°C to obtain a wet gel;

[0027] Step 2, place it in a vacuum drying oven for 6-8 hours to dry it;

[0028] Step 3, put the material in the muffle furnace, pre-calcine at medium temperature for 4-5 hours, and then calcinate at high temperature for 4-5 hours to obtain the target product LaFe 1-x Cu x o 3 For the perovskite material, the calcined material is ground to uniform fine particles for later use.

[0029] The perovskite material specific surface area of ​​the present invention is 13.8-18.8m 2 / g, the average p...

Embodiment 1

[0037] Step 1, according to the molar concentration ratio is 1:0.9:0.1:6, weigh La(NO 3 ) 3 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O, Cu(NO 3 ) 2 ·3H 2 O and C 6 h 8 o 7 .H 2 O, add water to make it dissolve so that the total concentration of metal ions is 0.02mol / L, and stir for 2 hours under the condition of heating in a water bath at 85°C to obtain a wet gel;

[0038] Step 2, place it in a vacuum drying oven for 6 hours to dry it, and the drying temperature is 95°C;

[0039] Step 3: Place the material in a muffle furnace and pre-calcine at 400°C for 4 hours, then calcinate at 700°C for 4 hours to obtain catalyst powder. The heating rate of the muffle furnace is 4°C / min;

[0040] Step 4, grinding the calcined material to uniform fine particles for later use.

Embodiment 2

[0042] Step 1, according to the molar concentration ratio is 1:0.8:0.2:6, weigh La(NO 3 ) 3 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O, Cu(NO 3 ) 2 ·3H 2 O and C 6 h 8 o 7 .H 2 O, add water to make it dissolve so that the total concentration of metal ions is 0.02mol / L, and stir for 2 hours under the condition of heating in a water bath at 90°C to obtain a wet gel;

[0043] Step 2, place it in a vacuum drying oven for 7 hours to dry it, and the drying temperature is 95°C;

[0044] Step 3: Place the material in a muffle furnace for pre-calcination at 400°C for 4 hours, and then calcinate at 700°C for 5 hours to obtain catalyst powder. The heating rate of the muffle furnace is 5°C / min;

[0045] Step 4, grinding the calcined material to uniform fine particles for later use.

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Abstract

The invention provides a LaFe(1-x)CuxO3 perovskite material. The LaFe(1-x)CuxO3 perovskite material is prepared with a method comprising steps as follows: step 1, La(NO3)3.6H2O, Fe(NO3)3.9H2O, Cu(NO3)2.3H2O and C6H8O7.H2O are weighed respectively, dissolved in water and stirred under the water-bath heating condition, and wet gel is obtained, wherein a mole ratio of La(NO3)3.6H2O, Fe(NO3)3.9H2O, Cu(NO3)2.3H2O and C6H8O7.H2O is 1:(1-x):x:6 and x is equal to 0.1, 0.2, 0.3, 0.4 and 0.5; step 2, the wet gel is dried in a vacuum drying box; step 3, a material obtained in the step 2 is presintered at350-450 DEG C and calcined at 650-700 DEG C, and a target product is obtained. The invention further discloses a preparation method of the material.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, in particular to a LaFe 1-x Cu x o 3 perovskite material. [0002] The invention also relates to a method for the preparation of the aforementioned materials. Background technique [0003] The molecular formula of perovskite oxide is ABO 3 , the A site is generally a rare earth or alkaline earth element ion, and the B site is a transition element ion. my country's rare earth reserves and output both rank first in the world, but the self-use rate of rare earths is low. Rare earth elements have the characteristics of unfilled 4f electron shell and lanthanide shrinkage, and have excellent oxygen storage and release capacity and mechanical stability. Studies have shown that the introduction of rare earth elements can significantly promote the catalytic performance of transition metal oxides. The catalyst also has high thermal stability and chemical corrosion resistance, and has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J37/03B01J37/08C02F1/72C02F101/36C02F101/38
CPCB01J23/002B01J23/83B01J37/036B01J37/088B01J2523/00C02F1/722C02F1/725C02F2101/306C02F2101/36C02F2101/38B01J2523/17B01J2523/3706B01J2523/842
Inventor 夏训峰程成高生旺王丽君朱建超香宝梁兰兰刘阳
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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