BiFe1-xCuxO3 perovskite material and preparation method

A perovskite material, a certain amount of technology, applied in chemical instruments and methods, water/sludge/sewage treatment, metal/metal oxide/metal hydroxide catalysts, etc., can solve the poor mobility of photogenerated carriers , slow circulation rate and other problems, to achieve the effect of ensuring water quality safety, efficient activation, uniform particle size and morphology

Pending Publication Date: 2020-11-24
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure bismuth ferrite still has the problems of poor photogenerated carrier mobility and slow Fe(III) / Fe(II) cycle rate, which limits the application of bismuth ferrite as a heterogeneous catalyst to a certain extent.

Method used

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  • BiFe1-xCuxO3 perovskite material and preparation method
  • BiFe1-xCuxO3 perovskite material and preparation method
  • BiFe1-xCuxO3 perovskite material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Step 1, according to the molar concentration ratio is 1:0.95:0.05, weigh Bi(NO 3 ) 3 ·5H 2 O, Fe(NO 3 ) 3 9H 2 O and Cu(NO 3 ) 2 ·3H 2 O, dissolved in ethylene glycol so that the total concentration of metal ions is 0.02mol / L, and stirred in a water bath at 30°C for 2 hours to obtain a reddish-brown sol;

[0041] Step 2, place it in an oven for 24 hours to dry it, and the drying temperature is 70°C;

[0042] Step 3: Place the material in a muffle furnace for pre-calcination at 300°C for 1 hour, and then calcinate at 550°C for 1 hour to obtain catalyst powder. The heating rate of the muffle furnace is 4°C / min;

[0043] Step 4, grinding the calcined material to uniform fine particles for later use.

Embodiment 2

[0045] Step 1, according to the molar concentration ratio is 1:0.92:0.08, weigh Bi(NO 3 ) 3 ·5H 2 O, Fe(NO 3 ) 3 9H 2 O and Cu(NO 3 ) 2 ·3H 2 O, dissolved in ethylene glycol so that the total concentration of metal ions is 0.02mol / L, and stirred in a water bath at 30°C for 2 hours to obtain a reddish-brown sol;

[0046] Step 2, place it in an oven for 24 hours to dry it, and the drying temperature is 70°C;

[0047] Step 3: Place the material in a muffle furnace for pre-calcination at 300°C for 1 hour, and then calcinate at 550°C for 1 hour to obtain catalyst powder. The heating rate of the muffle furnace is 4°C / min;

[0048] Step 4, grinding the calcined material to uniform fine particles for later use.

Embodiment 3

[0050] Step 1, according to the molar concentration ratio of 1:0.9:0.1, weigh Bi(NO 3 ) 3 ·5H 2 O, Fe(NO 3 ) 3 9H 2 O and Cu(NO 3 ) 2 ·3H 2 O, dissolved in ethylene glycol so that the total concentration of metal ions is 0.02mol / L, and stirred in a water bath at 30°C for 2 hours to obtain a reddish-brown sol;

[0051] Step 2, place it in an oven for 24 hours to dry it, and the drying temperature is 70°C;

[0052] Step 3: Place the material in a muffle furnace for pre-calcination at 300°C for 1 hour, and then calcinate at 550°C for 1 hour to obtain catalyst powder. The heating rate of the muffle furnace is 4°C / min;

[0053] Step 4, grinding the calcined material to uniform fine particles for later use.

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Abstract

The invention discloses a BiFe1-xCuxO3 perovskite material. The BiFe1-xCuxO3 perovskite material is an agglomerated nano granular solid, and prepared by the following method: step 1, respectively weighing a certain amount of Bi(NO3)3.5H2O, Fe(NO3)3.9H2O and Cu(NO3)2.3H2O, dissolving the Bi(NO3)3.5H2O, Fe(NO3)3.9H2O and Cu(NO3)2.3H2O into ethylene glycol, and magnetically stirring under a water bath heating condition to form reddish brown sol, wherein the molar ratio of Bi(NO3)3.5H2O to Fe(NO3)3.9H2O to Cu(NO3)2.3H2O is 1:(1-x):x, and the value range of x in the formula is 0.05-0.1; step 2, after aging, putting the sol into a drying oven to be dried to be in a gel state; and step 3, transferring the gel into a crucible, putting the crucible into a muffle furnace, presintering at 300-500 DEGC, and calcining at 500-600 DEG C to obtain the target product. The invention also 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 BiFe 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 composite oxide is ABO 3 , the A site is generally an alkaline earth metal or rare earth metal element, and the B site is a 3D transition metal element, which can accommodate more than 90% of the metal elements in the periodic table. Its A and B positions can be partially or completely replaced by foreign cations with different oxidation states and radii to keep the crystal structure unchanged. [0004] Bismuth ferrite (BiFeO 3 ) as an ABO 3 A kind of, due to the narrow band gap (E g =1.9-2.9eV), it can be used as a photocatalytic material to degrade organic pollutants in water, and because its structure contains Fe element, it is also a good heterogen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/843B01J35/10C02F1/72C02F1/30C02F101/38
CPCB01J23/8437B01J35/1004C02F1/725C02F1/30C02F2101/38
Inventor 高生旺王彩彩夏训峰朱建超王书平王洪良潘杰田志强
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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