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Magnetically supported titanium dioxide photocatalyst and preparation method thereof

A technology of titanium dioxide and photocatalyst, which is applied in the field of magnetically supported titanium dioxide photocatalyst and its preparation, can solve the problems of limiting the practical application of photocatalyst and low catalytic efficiency, and achieves good photocatalytic activity, high photocatalytic activity and easy separation and recovery. Effect

Inactive Publication Date: 2012-02-15
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the immobilization of catalysts has become a new research hotspot, but the catalytic efficiency of catalysts after immobilization is often lower than that of suspended catalysts, thus limiting the practical application of photocatalysts.

Method used

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  • Magnetically supported titanium dioxide photocatalyst and preparation method thereof
  • Magnetically supported titanium dioxide photocatalyst and preparation method thereof
  • Magnetically supported titanium dioxide photocatalyst and preparation method thereof

Examples

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Embodiment 1

[0026] Under normal temperature and pressure, 1×10 -3 mol FeCl 3 ·6H 2 O, 1.44 g of anhydrous sodium acetate and 0.4 g of polyethylene glycol 200 were respectively dissolved in 20 mL of ethylene glycol, and mixed thoroughly under magnetic stirring to obtain a clear solution. The clarified solution was sealed and placed in a 22 mL polytetrafluoroethylene-lined stainless steel reactor, and the reactor was placed in an oven. The temperature was raised to 180 ℃ at a heating rate of 5 ℃ / min. React for 8 h at temperature. After the reaction, the mixture obtained by the reaction was centrifuged at a rate of 12000 r / min for 2 min, the black solid obtained was washed with absolute ethanol for more than 8 times, and the solid obtained was dried in an oven at 80 ℃ In 8 hours, Fe3O4 can be obtained. Scanning electron microscope (SEM) characterization, such as figure 1 It can be seen that the product is a spherical particle with a good dispersion and a diameter of about 200 nm; X-ray diff...

Embodiment 2

[0030] Under normal temperature and pressure, 2×10 -3 mol FeCl 3 ·6H 2 O, 1.44 g of anhydrous sodium acetate and 0.4 g of polyethylene glycol 200 were respectively dissolved in 20 mL of ethylene glycol, and mixed thoroughly under the action of magnetic stirring to obtain a clear solution. The clarified solution was sealed and placed in a 22 mL polytetrafluoroethylene-lined stainless steel reactor, and the reactor was placed in an oven. The temperature was raised to 180 ℃ at a heating rate of 5 ℃ / min. React for 8 h at temperature. After the reaction, the mixture obtained by the reaction was centrifuged at a rate of 12000 r / min for 2 min, the black solid obtained was washed with absolute ethanol for more than 8 times, and the solid obtained was dried in an oven at 80 ℃ In 8 hours, Fe3O4 can be obtained. Scanning electron microscope (SEM) characterization, such as Figure 5 It can be seen that the product is a spherical particle with a good dispersion and a diameter of about 400...

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Abstract

The invention discloses a magnetically supported titanium dioxide photocatalyst and a preparation method thereof, belonging to the technical field of material preparation. A solvothermal process is used for obtaining a dimension-adjustable ferroferric oxide spherical particles, and the pH value, reaction temperature, reaction time and other experimental parameters are regulated to control the hydrolysis of tetrabutyl titanate, so that the tetrabutyl titanate is uniformly supported on the surface of the ferroferric oxide magnetic nucleus, thereby preparing the hexagonal crystal form magnetically supported titanium dioxide photocatalyst. The magnetically supported titanium dioxide photocatalyst has the advantages of controllable preparation technique, high safety and reliability and high yield, can be used for quickly catalyzing the degradation of pollutants, and can be easy in industrialization production.

Description

Technical field: [0001] The invention belongs to the technical field of material preparation, and in particular relates to a magnetically supported titanium dioxide photocatalyst and a preparation method thereof. Background technique: [0002] In recent years, semiconductor photocatalytic oxidation degradation of organic pollutants has become a hot spot in environmental pollution control. Titanium dioxide has the advantages of high activity, non-toxicity, good thermal stability, long duration, low price, and no secondary pollution. Valued by people. In order to improve the photocatalytic activity of titanium dioxide, the small size effect of the catalyst is usually used. This requires that the titanium dioxide particles must be nano-sized. This creates a contradiction between the activity of the catalyst and the easy loss of the catalyst and the difficulty of separation and recovery, thus limiting its industrialization. Promote applications. On the one hand, the catalyst must h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C02F1/30
Inventor 陶菲菲沈永淼胡小婉
Owner SHAOXING UNIVERSITY
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