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A kind of magnetic iron oxide modified titanium oxide visible light catalyst and preparation method thereof

A technology of magnetic iron oxide and titanium oxide, which is applied in the field of preparation of titanium-based photocatalytic materials, can solve the problems of unfavorable practical application of sewage treatment, difficult control of iron oxide particle size, crystal plane orientation and growth rate, etc., to promote denitrification and removal Phosphorus, improvement of reaction efficiency, effect of improvement of reaction efficiency

Active Publication Date: 2021-12-21
INST OF AGRI ENG TECH FUJIAN ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Generally, to obtain iron oxide through iron salt hydrolysis, it is necessary to ensure that the pH value of the solution during the hydrolysis process is greater than 3.8, and the particle size, crystal plane orientation, and growth rate of iron oxide after the hydrolyzed iron hydroxide is heated and dehydrated are not easy to control, which is not conducive to the practical application of sewage treatment.

Method used

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  • A kind of magnetic iron oxide modified titanium oxide visible light catalyst and preparation method thereof
  • A kind of magnetic iron oxide modified titanium oxide visible light catalyst and preparation method thereof
  • A kind of magnetic iron oxide modified titanium oxide visible light catalyst and preparation method thereof

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preparation example Construction

[0032] A preparation method of a titanium oxide visible light catalyst modified by magnetic iron oxide, comprising the following steps:

[0033] 1) Preparation of ferric hydroxide-titanate melt: mix anhydrous sodium hydroxide and anhydrous potassium hydroxide, and melt at 180°C±2°C and 0.1 MPa for 60 min±2 min to obtain a mixed Alkali clarification liquid; add ferric chloride powder and titanium dioxide powder into the mixed alkali clarification liquid, stir for 5-6 minutes to obtain a molten liquid of sodium hydroxide + potassium hydroxide + ferric chloride + titanium dioxide; mix sodium hydroxide + hydrogen The molten solution of potassium oxide + ferric chloride + titanium dioxide is kept at 180 °C ± 2 °C and 0.1 MPa for 3600 min ± 10 min to obtain sodium hydroxide + potassium hydroxide + Na 2 CO 3 +K 2 CO 3 + iron hydroxide - titanate melt;

[0034] 2) Add sodium hydroxide + potassium hydroxide + Na while hot 2 CO 3 +K 2 CO 3 +Add hydrochloric acid solution with pH...

Embodiment 1

[0043] A preparation method of a titanium oxide visible light catalyst modified by magnetic iron oxide, comprising the following steps:

[0044] 1) Preparation of ferric hydroxide-titanate melt: mix anhydrous sodium hydroxide and anhydrous potassium hydroxide, and melt at 180°C and 0.1 MPa for 60 min to obtain a mixed alkali clarified liquid; Add ferric chloride powder and titanium dioxide powder into the mixed alkali clarified liquid, stir for 5 minutes to obtain a molten solution of sodium hydroxide + potassium hydroxide + ferric chloride + titanium dioxide; mix sodium hydroxide + potassium hydroxide + ferric chloride + The molten solution of titanium dioxide was kept at 180 °C and 0.1 MPa for 3600 min to obtain sodium hydroxide + potassium hydroxide + Na 2 CO 3 +K 2 CO 3 + iron hydroxide - titanate melt;

[0045] 2) Add sodium hydroxide + potassium hydroxide + Na while hot 2 CO 3 +K 2 CO 3 +Add hydrochloric acid solution with pH=1 to the ferric hydroxide-titanate me...

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Abstract

The invention belongs to the field of preparation of titanium-based photocatalytic materials, in particular to a titanium oxide visible light catalyst modified by magnetic iron oxide and a preparation method thereof. The present invention uses sodium hydroxide and potassium hydroxide mixed alkali as melting solvent, ferric chloride and titanium dioxide as raw materials, hydrochloric acid solution (pH=1) as extraction agent, deionized water as cleaning agent and detergent, and Absolute ethanol is used as detergent and drying carrier. Under the condition of normal pressure and low temperature of 180°C, ferric hydroxide-titanate composite material is synthesized, and the titanium oxide composite material modified by magnetic iron oxide with porous structure is calcined at 400°C. The chemical and physical properties of the product are stable, and the titanium oxide catalyst modified by iron oxide can absorb visible light in sunlight, and has visible light catalytic activity and magnetic separation function.

Description

technical field [0001] The invention belongs to the field of preparation of titanium-based photocatalytic materials, in particular to a titanium oxide visible light catalyst modified by magnetic iron oxide and a preparation method thereof. Background technique [0002] Environmental pollution has become an urgent problem to be solved in the 21st century. Polluted water sources have brought more and more serious impacts on people's lives. Photocatalytic technology plays an important role in pollution control and environmental protection. It can directly convert light into chemical energy, promote the synthesis and degradation of compounds, and has the advantages of low energy consumption, high efficiency, no secondary pollution, and reusability. It has become a focus of extensive attention and research in many scientific research fields. Titanium dioxide (TiO 2 ) has stable chemical properties, is not prone to photocorrosion after being illuminated, is low in cost, has high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745C02F3/28C02F101/16C02F101/10
Inventor 陈彪李洁黄婧肖艳春
Owner INST OF AGRI ENG TECH FUJIAN ACAD OF AGRI SCI