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Magnetically-separatable ferriferrous oxide/silver chloride photocatalyst and preparation method thereof

A technology of ferroferric oxide and photocatalyst, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as difficult recycling, and achieve simplified preparation process, good photocatalytic activity and stability Sexuality, the effect that is conducive to large-scale industrial production

Inactive Publication Date: 2014-10-08
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a ferroferric oxide / silver chloride photocatalyst with magnetic separation and its preparation method, which solves the problem that the existing silver salt photocatalytic materials such as silver chloride are not easy to recycle

Method used

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  • Magnetically-separatable ferriferrous oxide/silver chloride photocatalyst and preparation method thereof
  • Magnetically-separatable ferriferrous oxide/silver chloride photocatalyst and preparation method thereof
  • Magnetically-separatable ferriferrous oxide/silver chloride photocatalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] A preparation method of ferric oxide / silver chloride photocatalyst with magnetic separation, comprising the following steps:

[0033] 1) Weigh 2.982g FeCl 2 4H 2 O was dissolved in 100mL deionized water, and 8.150g FeCl was weighed 3 ·6H 2 O was dissolved in 100mL deionized water, and 4.247g AgNO was weighed 3 Dissolve in 250mL deionized water to prepare a molar concentration of 0.3mol / L (48.66g / L) ferric chloride solution, 0.15mol / L (19.0g / L) ferrous chloride solution and 0.1mol / L ( 16.98g / L) silver nitrate solution, standby;

[0034] 2) Weigh 2mL of ferric chloride solution and 4mL of ferrous chloride solution and place them at a constant temperature of 70°C to mix and stir evenly; slowly add 0.1mol / L (4g / L) sodium hydroxide aqueous solution dropwise to adjust the pH to 6.5, And standing and aging at a constant temperature of 70°C for 1 hour to obtain a reaction mixture;

[0035] 3) Slowly add 120mL0.1mol / L (16.98g / L) silver nitrate solution dropwise to the reac...

Embodiment 2

[0038] A preparation method of ferric oxide / silver chloride photocatalyst with magnetic separation, comprising the following steps:

[0039] 1) Dissolve ferric chloride, ferrous chloride and silver nitrate in water respectively to prepare ferric chloride solution with a molar concentration of 0.3mol / L (48.66g / L), 0.15mol / L (19.0g / L) ferrous chloride solution and 0.1mol / L (16.98g / L) silver nitrate solution, standby;

[0040] 2) Weigh 2mL of ferric chloride solution and 4mL of ferrous chloride solution and place them at a constant temperature of 65°C to mix and stir evenly; slowly add 0.1mol / L (4g / L) sodium hydroxide aqueous solution dropwise to adjust the pH to 6.5, And standing and aging at a constant temperature of 65°C for 2 hours to obtain a reaction mixture;

[0041] 3) Slowly add 30mL0.1mol / L (16.98g / L) silver nitrate solution dropwise to the reaction mixture obtained in step 2), in the solution, Ag + : Cl - The content ratio is 1:1, fully stirred, and kept in the dark...

Embodiment 3

[0043] A preparation method of ferric oxide / silver chloride photocatalyst with magnetic separation, comprising the following steps:

[0044] 1) Ferric chloride, ferrous chloride, and silver nitrate were respectively dissolved in water to prepare a ferric chloride solution with a molar concentration of 0.3mol / L (48.66g / L), and a ferric chloride solution with a molar concentration of 0.15mol / L (19.0g / L). Ferrous chloride solution and 0.1mol / L (16.98g / L) silver nitrate solution, standby;

[0045] 2) Weigh 2mL of ferric chloride solution and 4mL of ferrous chloride solution and place them at a constant temperature of 75°C to mix and stir evenly; slowly add 0.1mol / L (4g / L) sodium hydroxide aqueous solution dropwise to adjust the pH to 7.0, And standing and aging at a constant temperature of 75°C for 2 hours to obtain a reaction mixture;

[0046] 3) Slowly add 60mL0.1mol / L (16.98g / L) silver nitrate solution dropwise to the reaction mixture obtained in step 2), in the solution, Ag ...

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Abstract

The invention discloses a magnetically-separatable ferriferrous oxide / silver chloride photocatalyst and a preparation method thereof. The photocatalyst is composed of silver chloride and ferriferrous oxide, silver chloride is supported by the surface of ferriferrous oxide, and in the photocatalyst, ferriferrous oxide accounts for 20-40% by specific gravity of the photocatalyst. The preparation method comprises: respectively dissolving ferric chloride, ferrous chloride and silver nitrate in water, so as to prepare a ferric chloride solution, a ferrous chloride solution and a silver nitrate solution for usage; mixing the ferric chloride solution and the ferrous chloride solution under a constant-temperature condition, so as to obtain a reaction mixed solution containing ferriferrous oxide; and slowly dropwise adding the silver nitrate solution into the reaction mixed solution, so as to prepare the magnetically-separatable ferriferrous oxide / silver chloride photocatalyst. When being used to degrade organic dye wastewater, the light-responsive ferriferrous oxide / silver chloride photocatalyst exhibits good photocatalytic activity and stability compared with silver chloride, and also the photocatalyst has the magnetically separatable characteristic.

Description

technical field [0001] The invention relates to the field of photocatalysts, in particular to a ferric oxide / silver chloride photocatalyst with magnetic separation and a preparation method thereof. Background technique [0002] With the development of industry, environmental pollution has become a major problem for human survival and development, and water pollution is a direct threat to human health. Therefore, how to efficiently degrade pollutants in water has become a topic that scientists all over the world need to overcome. Compared with traditional water pollutant treatment technologies, semiconductor photocatalysis technology has the advantages of high efficiency, low carbon, environmental protection, low toxicity, and low cost. The use of sunlight to treat environmental pollutants has great application prospects, and this type of material has also become a hot spot in the field of photocatalysis research. [0003] AgCl and other silver salt materials are common phot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/128C02F1/30C02F101/30C02F103/30
CPCY02W10/37
Inventor 原弘刘泽泞刘永成蔡木锦徐飘飘
Owner HUAZHONG AGRI UNIV
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