Preparation method of lanthanum ferrite doped silver bromide compound photocatalyst

A technology of lanthanum ferrite and silver bromide, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of limited application and research, poor photosensitivity and stability, and meet the preparation conditions Easy to control, simple preparation method, high catalytic efficiency

Active Publication Date: 2017-06-09
CHANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its poor photosensitivity and stability greatly limi

Method used

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  • Preparation method of lanthanum ferrite doped silver bromide compound photocatalyst
  • Preparation method of lanthanum ferrite doped silver bromide compound photocatalyst
  • Preparation method of lanthanum ferrite doped silver bromide compound photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) In a beaker, dissolve 1.2g of lanthanum nitrate, 1.6g of ferric nitrate and 1.6g of citric acid in 100ml of water, heat to 60°C and stir for 30min, adjust the pH value to 6 with ammonia water, form a gel, and dry at 60°C 6h, put it into a muffle furnace, sinter at 500°C for 2h, and grind to get lanthanum ferrite.

[0022] (2) Disperse 0.018g of lanthanum ferrite in step (1) in 20ml of absolute ethanol, ultrasonicate for 30min, add 0.18g of silver nitrate, stir for 30min, then add 0.108g of potassium bromide, stir for 30min, centrifuge, wash, Dry at 60°C for 4h.

Embodiment 2

[0024] (1) In a beaker, dissolve 0.56g of lanthanum nitrate, 1.6g of ferric nitrate and 0.8g of citric acid in 50ml of ethanol, heat to 80°C and stir for 60min, adjust the pH value to 8 with ammonia water, and form a gel at 80°C Dry for 12 hours, put it in a muffle furnace, sinter at 600°C for 3 hours, and grind to get lanthanum ferrite.

[0025] (2) Disperse 0.072g of lanthanum ferrite in step (1) in 30ml of deionized water, sonicate for 60min, add 0.18g of silver nitrate, stir for 60min, then add 0.126g of sodium bromide, stir for 60min, centrifuge, wash, Dry at 80°C for 6h.

[0026] 1. Performance determination of lanthanum ferrite / silver bromide composite photocatalyst

[0027] The crystalline phase structure of the lanthanum ferrite / silver bromide composite photocatalyst prepared in Example 1 is analyzed by a Japan Rigaku D / max2500PC rotation X-ray diffractometer, wherein the X-ray is Cu target Kα The voltage is 40kV, the current is 100mA, the step size is 0.02°, and t...

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Abstract

The invention relates to a preparation method of a lanthanum ferrite doped silver bromide compound photocatalyst. The preparation method comprises the following contents: preparation of lanthanum ferrite and preparation of the lanthanum ferrite doped silver bromide compound photocatalyst. The preparation method has the beneficial effects that the preparation method is relatively simple and convenient, the preparation conditions are easy to control, and the prepared lanthanum ferrite doped silver bromide compound photocatalyst is a green and environmentally-friendly high-performance catalyst, is free of pollution and high in catalytic efficiency and has certain application values.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of photocatalytic materials, and relates to a preparation method of a lanthanum ferrite-doped silver bromide composite photocatalyst. Background technique [0002] Photocatalytic technology, as an emerging technology for environmental pollution problems, has been extensively studied and concerned by scientists in recent years. Studies have shown that photocatalytic technology has dual value in theoretical research and practical application. However, traditional photocatalysts have disadvantages such as small specific surface area, low photocatalytic efficiency, low quantum yield and low separation rate. Therefore, searching for new visible light catalysts is the top priority in the development of photocatalytic technology. The study found that perovskite (ABO 3 )-type composite oxides have the advantages of excellent electromagnetic properties, high catalytic properties, and...

Claims

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Application Information

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IPC IPC(8): B01J27/128C02F1/30C02F101/30
Inventor 李忠玉宋彦任金杰徐松
Owner CHANGZHOU UNIV
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