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A kind of ferric oxide/bismuth oxyiodide/silver bromide magnetic composite visible light catalyst and its preparation

A technology of triiron tetroxide and bismuth iodide oxide, which is applied in the field of photocatalytic technology materials, can solve the problems of large band gap and lower solar energy utilization rate, and achieve the effects of easy recovery, easy recycling, and good magnetic properties

Inactive Publication Date: 2019-02-05
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, titanium dioxide has a large band gap and can only be excited by ultraviolet light, and ultraviolet light in sunlight only accounts for a small part, which greatly reduces the utilization rate of solar energy.

Method used

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  • A kind of ferric oxide/bismuth oxyiodide/silver bromide magnetic composite visible light catalyst and its preparation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1. (1) prepare magnetic ferric oxide:

[0017] Dissolve 0.6250g ferric chloride hexahydrate, 3.0g sodium acetate in a mixed solution of 30mL ethylene glycol and 10mL oleic acid, heat in a water bath, stir at a constant temperature for 20min until the solid is completely dissolved, transfer to a hydrothermal kettle at 200°C and react for 20h to obtain magnetic tetra Ferric oxide.

[0018] (2) Synthesis of ferric oxide / bismuth oxyiodide magnetic composite visible light catalyst

[0019] Dissolve 0.0364g of ferric oxide and 0.4851g of bismuth nitrate pentahydrate in 10ml of ethylene glycol to form solution A, dissolve 0.1660g of potassium iodide in 15ml of water to form solution B, slowly drop solution B into solution A, Adjust the pH to 11, stir for 30 minutes, transfer to a hydrothermal kettle, and react at a reaction temperature of 140° C. for 24 hours to obtain ferric oxide / bismuth oxyiodide magnetic composite visible light catalyst. The mass fraction of f...

Embodiment 2

[0023] Embodiment 2. (1) prepare magnetic ferric oxide:

[0024] Dissolve 0.6250g ferric chloride hexahydrate, 3.0g sodium acetate in a mixed solution of 30mL ethylene glycol and 10mL oleic acid, heat in a water bath, stir at a constant temperature for 20min until the solid is completely dissolved, transfer to a hydrothermal kettle at 200°C and react for 20h to obtain magnetic tetra Ferric oxide.

[0025] (2) Synthesis of ferric oxide / bismuth oxyiodide magnetic composite visible light catalyst

[0026] Dissolve 0.0146g of ferric oxide and 0.4851g of bismuth nitrate pentahydrate in 10ml of ethylene glycol to form solution A, dissolve 0.1660g of potassium iodide in 15ml of water to form solution B, slowly drop solution B into solution A, Adjust the pH to 11, stir for 30 minutes, transfer to a hydrothermal kettle, and react at a reaction temperature of 140° C. for 24 hours to obtain a composite photocatalyst of ferric oxide and bismuth oxyiodide. The mass fraction of ferric oxi...

Embodiment 3

[0030] Embodiment 3.(1) prepare the good ferric oxide of magnetic field:

[0031] Dissolve 0.6250g ferric chloride hexahydrate, 3.0g sodium acetate in a mixed solution of 30mL ethylene glycol and 10mL oleic acid, heat in a water bath, stir at a constant temperature for 20min until the solid is completely dissolved, transfer to a hydrothermal kettle at 200°C and react for 20h to obtain magnetic tetra Ferric oxide.

[0032] (2) Synthesis of ferric oxide / bismuth oxyiodide magnetic composite visible light catalyst

[0033] Dissolve 0.0405g of ferric oxide and 0.7673g of bismuth nitrate pentahydrate in 20ml of ethylene glycol to form solution A, dissolve 0.2490g of potassium iodide in 30ml of water to form solution B, slowly drop solution B into solution A, Adjust the pH to 11, stir for 30 minutes, transfer to a hydrothermal kettle, and react at a reaction temperature of 140° C. for 24 hours to obtain a composite photocatalyst of ferric oxide and bismuth oxyiodide. The mass fract...

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Abstract

The invention discloses a ferric tetroxide / bismuth oxyiodide / silver bromide magnetic composite visible light catalyst and a method for preparing the same. Its main features are: ferric tetraoxide / bismuth iodide oxide / silver bromide are heated through hydrothermal treatment. Method synthesis. First, the magnetic ferric oxide and the visible light catalyst bismuth oxyiodide are combined to make the catalyst magnetically recoverable, improving its recyclability; secondly, the ferric oxide / bismuth iodide oxide and silver bromide are combined to form a heterogeneous The structure promotes the effective separation of photogenerated electron-hole pairs and improves the photocatalytic activity. The main preparation steps are: (1) Preparing magnetic ferric oxide by hydrothermal method. (2) Preparation of ferric tetroxide / bismuth iodide magnetic composite photocatalyst by hydrothermal method. (3) Preparation of ferric tetroxide / bismuth oxyiodide / silver bromide magnetic composite visible light catalyst by hydrothermal method. This method has the excellent characteristics of being simple, easy to implement, green and environmentally friendly. The prepared catalyst has high catalytic activity and can be magnetically recycled, so it has good application prospects.

Description

technical field [0001] The invention relates to a ferric oxide / bismuth oxyiodide / silver bromide magnetic composite visible light catalyst and its preparation. The semiconductor visible light catalyst is used to catalyze and degrade organic matter in water, and belongs to the field of photocatalytic technology materials. Background technique [0002] Energy crisis and global pollution are huge challenges in the future development of human beings. Photocatalytic technology has been extensively studied in terms of environmental protection and energy utilization due to its advantage of directly using sunlight to solve water pollution. Photocatalytic technology is an emerging environmental protection technology born in the 1970s. As a traditional photocatalyst, titanium dioxide has become the most popular photocatalyst in the world due to its strong oxidation ability, stable chemical properties, and non-toxicity. photocatalytic material. However, titanium dioxide has a large ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/128
CPCB01J27/128B01J35/33B01J35/39
Inventor 燕启社崔逸萌赵雅蕾董小霞张强申贵宾陈耀钟正全
Owner ZHENGZHOU UNIV