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Magnetic-particle photocatalyst with core-shell structure, preparation and application thereof

A photocatalyst, magnetic particle technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, inorganic material magnetism, etc.

Active Publication Date: 2010-06-30
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It makes it easy to solve the problem of catalyst post-processing, and obtain a catalyst with wide wavelength application, which improves the photon quantum efficiency

Method used

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  • Magnetic-particle photocatalyst with core-shell structure, preparation and application thereof
  • Magnetic-particle photocatalyst with core-shell structure, preparation and application thereof
  • Magnetic-particle photocatalyst with core-shell structure, preparation and application thereof

Examples

Experimental program
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Embodiment Construction

[0070] Using pulsed laser sputtering deposition method or multi-target magnetron sputtering method to prepare core (magnetic particle)-shell (new catalyst) composite catalyst particles, successfully prepared γ-Fe 2 o 3 (Ferromagnetic particle core)-Gd 3-x Bi x SbO 7 (0.5≤x≤1) (photocatalyst shell), γ-Fe 2 o 3 (Ferromagnetic particle core)-Gd 3-x Y x SbO 7 (0.5≤x≤1) (photocatalyst shell), γ-Fe 2 o 3 (Ferromagnetic particle core)-In 3-x Bi x TaO 7 (0.5≤x≤1) (photocatalyst shell), SiO 2 (paramagnetic particle core)-Gd 3-x Bi x SbO 7 (0.5≤x≤1) (photocatalyst shell), SiO2 (paramagnetic particle core)-Gd 3-x Y x SbO 7 (0.5≤x≤1) (photocatalyst shell), SiO 2 (paramagnetic particle core)-In 3-x Bi x TaO 7 (0.5≤x≤1) (photocatalyst shell), MnO (antiferromagnetic particle core)-Gd 3-x Bi x SbO 7 (0.5≤x≤1) (photocatalyst shell), MnO (antiferromagnetic particle core)-Gd 3-x Y x SbO 7 (0.5≤x≤1) (photocatalyst shell), MnO (antiferromagnetic particle core)-In 3-x B...

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Abstract

Magnetic-particle photocatalyst with a core-shell structure takes a ferromagnetism particle, a paramagnetism particle or a diamagnetism particle as a core, and photocatalyst as a shell. The ferromagnetism, paramagnetism or diamagnetism particles are gamma-Fe2O3, SiO2 or MnO particle respectively, and the photocatalyst is Gd3-xBixSbO7, Gd3-xYxSbO7 and In3-xBixTaO7 respectively, wherein the grain diameter of the gamma-Fe2O3, SiO2 and MnO is 80-2,000nm. Water-treatment is carried out on the photocatalyst in a magnetic field-photocatalytic system, and the periphery of a reaction system for water-treatment is provided with an alternating magnetic field generator with adjustable magnetic field intensity, wherein the range of the magnetic field intensity is 0-15T, and radiation light sources of the reaction system adopt a 300W xenon lamp and a 400W high-voltage mercury lamp; the ferromagnetism particle, paramagnetism particle and diamagnetism particle respectively account for 33+ / -10% in themagnetic-particle core for coating the photocatalyst, and are completely and uniformly dispersed in aqueous solution, thus the composite photocatalyst is uniformly distributed in the upper, middle and lower layers of the aqueous solution.

Description

technical field [0001] The invention relates to a photocatalyst, especially a magnetic particle photocatalyst with a core-shell structure, preparation and application, a magnetic composite material with a "magnetic particle core-photocatalyst shell" structure and a new nano-catalytic material Gd 3-x Bi x SbO 7 (0.5≤x≤1) and Gd 3-x Y x SbO 7 (0.5≤x≤1), and the gradient distribution of the composite photocatalytic material is obtained through a magnetic field, and the organic pollutants in the water body are removed by photocatalysis. Background technique [0002] The treatment of toxic and refractory organic substances (PTS) in water has always been a difficult and hot topic in the field of water treatment. PTS has the characteristics of high risk to human body and ecological environment. Therefore, developed countries have strict control standards for such pollutants. Since conventional biochemical treatment methods have poor removal effects (or almost no treatment eff...

Claims

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Application Information

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IPC IPC(8): B01J23/843B01J23/847B01J23/18B01J23/20B01J23/34H01F1/01C23C14/34C23C14/35C02F1/48C02F1/30C02F1/32C02F1/58C01B3/04C02F101/30
CPCY02E60/364Y02W10/37Y02E60/36
Inventor 栾景飞马坤李咏梅潘丙才
Owner NANJING UNIV
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