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Codope titanium oxide porous microballoon with drum-shaped rattle structure and preparation method thereof

A technology of porous microspheres and co-doping, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc. Low-level problems, achieve high degradation efficiency, unique catalyst structure, and improve photocatalytic activity

Active Publication Date: 2012-04-18
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But as a good photocatalytic material, TiO 2 There are still defects, mainly in: (1) wide band gap (3.2 eV), can only be excited by ultraviolet light with a short wavelength (<387.5 nm), has no response in the visible light range, and has low utilization rate of sunlight; ( 2) The recombination rate of photogenerated electrons and holes is high, and the photon quantum efficiency is low

Method used

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  • Codope titanium oxide porous microballoon with drum-shaped rattle structure and preparation method thereof
  • Codope titanium oxide porous microballoon with drum-shaped rattle structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Prepare the Eu, N co-doped titanium oxide porous microsphere photocatalyst with rattle drum structure according to the preparation method proposed by the present invention:

[0024] (1) Dissolve 3.4 mL of isopropanol titanate, 4.8 mL of glacial acetic acid, and 0.00386 g of europium nitrate in 30 mL of ethanol at room temperature to form solution A;

[0025] (2) Add 0.6 g of polyethylene glycol (molecular weight 2000) and 1.2 g of urea into solution A, heat and stir in a water bath at 40 °C to obtain clear and transparent solution B;

[0026] (3) Seal the solution B in a 80 mL reactor, and conduct a hydrothermal reaction at 180 °C for 4 hours;

[0027] (4) After natural cooling to room temperature, the hydrothermal reaction product was washed three times with water and ethanol, and then dried at 80 °C to obtain europium-nitrogen co-doped titanium oxide microspheres with a rattle structure (catalyst morphology as figure 1 shown).

[0028] From figure 1 It can be see...

Embodiment 2

[0031] Prepare the Eu, N co-doped titanium oxide porous microsphere photocatalyst with rattle drum structure according to the preparation method proposed by the present invention:

[0032] (1) Dissolve 4.0 mL of isopropanol titanate, 6.0 mL of glacial acetic acid, and 0.00772 g of europium nitrate in 40 mL of ethanol at room temperature to form solution A;

[0033] (2) Add 0.8 g of polyethylene glycol (molecular weight 2000) and 1.8 g of urea into solution A, heat and stir in a water bath at 50 °C to obtain a clear and transparent solution B;

[0034] (3) Seal the solution B in a 100 mL reactor, and conduct a hydrothermal reaction at 180 °C for 4 hours;

[0035](4) After natural cooling to room temperature, the hydrothermal reaction product was washed three times with water and ethanol, and then dried at 80°C to obtain europium-nitrogen co-doped titanium oxide microspheres with a rattle structure.

[0036] Analysis and characterization show that the diameter of the catalyst m...

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Abstract

The invention relates to a photocatalysis material for treating organic pollutants in water and a preparation method thereof. The photocatalysis material is an europium and nitrogen codoped titanium oxide microballoon with a special drum-shaped rattle structure. Doping of nitrogen renders the catalyst visible photolytic activity; doping of europium facilitates increase of transmission rate of photoproduction electrons, reduction of composite between photoproduction electrons and a cavity and enhancement of photocatalysis performance of the catalyst; a hollow structure of the shape of drum-shaped rattle enables multiple reflection of incident light in an inner cavity and increases utilization efficiency of luminous energy. The catalyst has strong catalytic activity under visible light, canrapidly reduce concentration of organic pollutants in water in a short time and finally completely degrade almost all the pollutants, is suitable for treating organic waste water, easily prepared by a simple preparation method and has a wide application prospect.

Description

technical field [0001] The invention belongs to a photocatalyst and its preparation method, in particular to a double-element co-doped modified titanium oxide porous microsphere with a special rattle structure and its preparation method. The catalyst has a high photocatalyst under visible light Catalytic activity, can be used for photocatalytic degradation of organic pollutants in water. Background technique [0002] Textile and other dye-related industries will produce a large amount of organic pollutants. If these pollutants are not treated and discharged directly, they will cause serious pollution to water bodies, and even produce carcinogens in an anaerobic environment. In order to eliminate the potential threats of these organic pollutants, people have researched and developed many methods to deal with these pollutants, such as flocculation, adsorption, ultrafiltration, reverse osmosis, and extraction. These techniques, however, do not break down organic pollutants, on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10B01J37/10C02F1/30C02F101/38
Inventor 石建稳付明来崔浩杰陈少华
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI