Method for manufacturing magnetic loading type nanometer catalyst TiO2/Fe2O4

A nano-photocatalyst and a production method technology are applied in the field of production of magnetically supported nano-photocatalyst TiO2/Fe3O4, which can solve the problems of incapability of industrial application, difficult recycling, high cost of wastewater treatment, and achieve good photocatalytic activity and cost reduction. Effect

Inactive Publication Date: 2010-09-01
LANZHOU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

Nano-TiO 2 It is a high-performance photocatalyst. Due to the advantages of high catalytic efficiency, non-toxicity and pollution-free, it can be used in many fields such as purification, sterilization and degradation of various organic compounds, especially in the photocatalytic oxidation degradation of industrial wastewater. better effect, but due to nano-TiO 2 Powder recovery is difficult and difficult to recycle, resulting in the use of nano-TiO 2 The cost of treating wastewater is high and cannot be applied industrially

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  • Method for manufacturing magnetic loading type nanometer catalyst TiO2/Fe2O4
  • Method for manufacturing magnetic loading type nanometer catalyst TiO2/Fe2O4
  • Method for manufacturing magnetic loading type nanometer catalyst TiO2/Fe2O4

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[0014] The magnetic loaded nano photocatalyst TiO 2 / Fe 3 o 4 The production method is characterized in that it comprises the following steps:

[0015] 1) Using the co-precipitation method, using ferrous sulfate, ferric sulfate, and ammonia water as the main raw materials, to prepare black nano-Fe with good dispersibility 3 o 4 particles, the reaction conditions are: reaction temperature 60°C, Fe 3+ : Fe 2+ The molar ratio is 1.8, the reaction time is 70min, the crystallization temperature is 60°C, the pH of the reaction solution is 11, and the amount of surfactant is 10% of the iron ion content;

[0016] 2) by sol-gel method in Fe 3 o 4 The surface is coated with a layer of photocatalytic TiO 2 , forming a core-shell structure of TiO 2 / Fe 3 o 4 Composite material, the particle size of the composite material is about 30nm, has superparamagnetism, and the TiO on the surface 2 The layer has an anatase structure, and the reaction conditions for preparing nano-titaniu...

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Abstract

The invention relates to a method for manufacturing a magnetic loading type nanometer catalyst TiO2/Fe2O4. The method comprises the following steps of: using ferrous sulfate, ferric sulfate and ammonia as raw materials to prepare black nanometer Fe3O4 particles with good dispersivity through a coprecipitation process; coating one layer of TiO2 with optical catalyst on the Fe3O4 surface by a sol-gel process, and forming a TiO2/Fe3O4 composite material with a core-shell structure; carrying out heat treatment and recycling to obtain a magnetic loading type nanometer catalyst TiO2/Fe2O4. The catalyst not only has good optical catalytic activity, but also can utilize the outer magnetic field to realize convenient and quick recovering and reutilization, thereby decreasing the cost of waste water treatment and realizing the practical application of nanometer TiO2 in wastewater treatment.

Description

technical field [0001] The invention relates to a magnetically loaded nano photocatalyst TiO for comprehensive treatment of industrial wastewater 2 / Fe 3 o 4 production method. Background technique [0002] With the rapid development of my country's industry, the discharge of industrial wastewater has increased year by year. In 2006 alone, the total discharge of sewage in the country reached 73.1 billion tons. These industrial wastewaters pollute many rivers and rivers in our country to varying degrees, causing environmental pollution, which is very unfavorable to people's health. Therefore, the comprehensive treatment of industrial wastewater has become an important issue that needs to be solved urgently by the world's environmental science community. [0003] In response to the above problems, many scholars at home and abroad have carried out a lot of research in recent years, and achieved results in many aspects, especially breakthroughs in photochemistry, among which ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J21/06B01J23/94C02F1/30
Inventor 寇生中胡聪丽吴参军胡勇丁雨田
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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