Iron modified photocatalytic material, preparation method and application thereof

A photocatalytic material and modification technology, applied in the field of water treatment, can solve problems such as reducing photocatalytic activity, and achieve the effects of simple and easy operation, good prospects, and easy availability of raw materials

Active Publication Date: 2018-07-24
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Recent studies have shown that the transition metal (Zn, Sn) modification of BiOBr can improve the photocatalytic activity, but the metal oxides on its surface can rapidly reduce its photocatalytic activity.

Method used

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  • Iron modified photocatalytic material, preparation method and application thereof
  • Iron modified photocatalytic material, preparation method and application thereof
  • Iron modified photocatalytic material, preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0035] Under the protection of argon, after adding glacial acetic acid with a volume ratio of 1:10 in ethylene glycol, add bismuth nitrate, stir until the bismuth nitrate is completely dissolved, and prepare a bismuth nitrate solution with a concentration of 0.1mol / L; Add FeCl with Fe / Bi molar ratio of 0, 0.05, 0.1, 0.2, 0.4 2 4H 2 0, stir until iron salt is all dissolved; Add the ethylene glycol solution that contains 0.1mol / L Potassium bromide that volume ratio is 1:1 in the solution of gained. Then, react the mixed solution at 160 degrees Celsius for not less than 12 hours. After naturally cooling to room temperature, centrifuge, wash with absolute ethanol and ultrapure water several times, and freeze-dry.

[0036] The obtained samples are represented by x-FBB, where x(0.05, 0.1, 0.2, 0.4) is the molar ratio of Fe / Bi, which are 0.05, 0.1, 0.2, 0.4 respectively; the samples without iron modification are BiOBr samples. All operations were performed under argon protection. ...

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Abstract

The invention discloses an iron modified photocatalytic material, a preparation method and application thereof. The preparation method comprises the steps of adding a potassium bromide solution to a solution containing an iron salt and bismuth nitrate for high-temperature reaction to obtain the iron modified photocatalytic material. The photocatalyst with heterojunction can be successfully prepared by the preparation process, and the photocatalytic effect can be greatly improved; by the introduction of the iron salt, the specific surface area of the photocatalytic material can be increased, and the adsorption performance can be enhanced; in the presence of hydrogen peroxide, the photocatalytic reaction process causes an iron element on the surface of the catalytic material to form a chainreaction between ferrous iron and ferric iron, and the catalytic degradation effect is very excellent; the operation method is simple and easy, raw materials are easy to obtain, the cost is low, and the prospect of promotion and implementation in the practical application is good.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to an iron-modified photocatalytic material and a preparation method and application thereof. Background technique [0002] With human activities, more and more emerging persistent toxic pollutants enter the water environment. Traditional water treatment methods cannot meet the requirements. Fortunately, advanced oxidation processes have been successfully used to treat water bodies containing emerging pollutants. The advanced oxidation process uses chemical oxidants (such as hydrogen peroxide, ammonium persulfate, ozone), photochemical and sonochemical techniques to generate active species (such as hydroxyl radicals, superoxide radicals, sulfate radicals). The hydroxyl radicals produced by the Fenton-like reaction are environmentally friendly and have a high redox potential. [0003] The generation of hydroxyl radicals is due to the catalytic decomposition of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/128B01J35/10B01J20/06B01J20/30C02F1/28C02F1/30
CPCB01J20/06B01J27/128B01J35/004B01J35/1004C02F1/281C02F1/30
Inventor 王东升耿欣李文涛肖峰
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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