A zeolite-supported ag-doped bifeo 3 /bi 2 fe 4 o 9 Composite materials and their preparation methods and applications

A composite material and zeolite technology, applied in chemical instruments and methods, water/sludge/sewage treatment, chemical/physical processes, etc., can solve the problem of single semiconductor photocatalyst carrier, weak visible light catalytic performance, poor recyclability, etc. problem, to achieve good visible light catalytic performance, inhibit recombination rate, and avoid the use of strong alkali

Active Publication Date: 2020-04-21
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned deficiencies, the present invention provides a zeolite-loaded Ag-doped BiFeO 3 / Bi 2 Fe 4 o 9 Composite materials and their preparation methods and applications to solve the shortcomings of existing zeolite-based composite photocatalytic materials with weak visible light catalytic performance, poor recyclability and easy recombination of single semiconductor photocatalyst carriers

Method used

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  • A zeolite-supported ag-doped bifeo <sub>3</sub> /bi <sub>2</sub> fe <sub>4</sub> o <sub>9</sub> Composite materials and their preparation methods and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Weigh 0.5g natural stilbite, 0.404g Fe(NO 3 ) 3 9H 2 O and 0.04gAgNO 3 Stir and disperse in 10g deionized water to obtain mixed solution A;

[0026] (2) Weigh 0.4851g Bi(NO 3 ) 3 ·5H 2 O was stirred and dissolved in 3.12g ethylene glycol to obtain mixed solution B;

[0027] (3) 1 g of urea was dissolved in 6 g of deionized water to obtain a mixed solution C;

[0028](4) Slowly add the mixed solution A obtained in step (1) to the mixed solution B obtained in step (2), stir for 1 min to obtain the mixed solution D, then slowly add the mixed solution C obtained in step (3) to the mixed solution In D, stir for 1 min to obtain mixed solution E;

[0029] (5) Put the mixture E obtained in step (4) in a water bath at 95°C to form a sol, then place it in an oven at 130°C to form a gel, then place it in a tube furnace at 580°C, and calcine it under a nitrogen atmosphere for 3 hours. Obtaining zeolite-supported Ag-doped BiFeO 3 / Bi 2 Fe 4 o 9 composite material. ...

Embodiment 2

[0031] (1) Weigh 0.75g natural clinoptilolite, 0.303g Fe(NO 3 ) 3 9H 2 O and 0.015gAgNO 3 Stir and disperse in 9g deionized water to obtain mixed solution A;

[0032] (2) Weigh 0.3638g Bi(NO 3 ) 3 ·5H 2 O was stirred and dissolved in 1.95g ethylene glycol to obtain mixed solution B;

[0033] (3) 1.2g of urea was dissolved in 12g of deionized water to obtain mixed solution C;

[0034] (4) Slowly add the mixed solution A obtained in step (1) to the mixed solution B obtained in step (2), stir for 5 minutes to obtain the mixed solution D, and then slowly add the mixed solution C obtained in step (3) to the mixed solution In D, stir for 5 minutes to obtain mixed solution E;

[0035] (5) Put the mixed liquid E obtained in step (4) in a water bath at 98°C to form a sol, then place it in an oven at 120°C to form a gel, then place it in a tube furnace at 560°C, and calcine it under a nitrogen atmosphere for 2 hours. Obtaining zeolite-supported Ag-doped BiFeO 3 / Bi 2 Fe 4 o ...

Embodiment 3

[0037] (1) Weigh 1.72g natural mordenite, 1.0423g Fe(NO 3 ) 3 9H 2 O and 0.086gAgNO 3 Stir and disperse in 23g deionized water to obtain mixed solution A;

[0038] (2) Weigh 1.2516g Bi(NO 3 ) 3 ·5H 2 O was stirred and dissolved in 6.88g ethylene glycol to obtain mixed solution B;

[0039] (3) 3.1g of urea was dissolved in 19g of deionized water to obtain mixed solution C;

[0040] (4) Slowly add the mixed solution A obtained in step (1) to the mixed solution B obtained in step (2), stir for 3 minutes to obtain the mixed solution D, then slowly add the mixed solution C obtained in step (3) to the mixed solution In D, stir for 3 minutes to obtain mixed solution E;

[0041] (5) Put the mixture E obtained in step (4) in a water bath at 98°C to form a sol, then place it in an oven at 125°C to form a gel, then place it in a tube furnace at 570°C, and calcine it under a nitrogen atmosphere for 3 hours. Obtaining zeolite-supported Ag-doped BiFeO 3 / Bi 2 Fe 4 o 9 composite...

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Abstract

The invention discloses a zeolite-loaded Ag-doped BiFeO3 / Bi2Fe4O9 composite material as well as a preparation method and an application thereof. According to the preparation method, urea is hydrolyzedinto a precipitator, so that the use of strong base in the preparation process of BiFeO3 / Bi2Fe4O9 is avoided, the process flow is simple, and no wastewater is produced. The prepared zeolite-loaded Ag-doped BiFeO3 / Bi2Fe4O9 composite material has magnetic reclaim performance and photocatalysis performance and can be applied to the photocatalysis purification of dye wastewater and Cu<2+>-containingwastewater.

Description

technical field [0001] The invention relates to a zeolite loaded Ag-doped BiFeO 3 / Bi 2 Fe 4 o 9 The composite material and its preparation method and application belong to the technical field of development and preparation of non-metallic mineral environmental protection purification materials. Background technique [0002] Zeolite is a hydrous frame-like aluminosilicate mineral. Because of its unique pore structure, super adsorption capacity and special ion exchange capacity, zeolite is helpful for the enrichment of pollutants, and is regarded as a very promising The photocatalyst carrier material is beneficial to alleviate the current energy and environmental problems. [0003] At present, most of the research carried out is to use zeolite as the carrier to support the traditional semiconductor material TiO 2 , see the following references: ① Chinese invention patent name is "a nano-titanium dioxide / zeolite composite photocatalytic material and its preparation method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/076B01J29/26B01J29/58C02F1/30C02F101/20
CPCB01J29/076B01J29/26B01J29/58B01J35/004C02F1/30C02F2101/20C02F2305/10
Inventor 孙青吴坤张俭盛嘉伟
Owner ZHEJIANG UNIV OF TECH
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