Titania nanotube/nanorod microspheres with hierarchical structure and preparation method thereof

A technology of titanium dioxide and nanotubes, applied in the field of titanium dioxide nanotube/nanorod microspheres with hierarchical structure and its preparation, can solve the problems of small specific surface area of ​​microspheres, and achieve easy recycling, large industrialization value, and strong ultraviolet absorption effect of ability

Inactive Publication Date: 2011-11-16
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

"Journal of the American Chemical Society" (J.Am.Chem.Soc.2008, 130, 11256-11257) reported that graded titanium dioxide microspheres have a good effect in filtering and treating sewage, but the specific surface area of ​​the microspheres is small , only 21.6m 2 / g

Method used

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  • Titania nanotube/nanorod microspheres with hierarchical structure and preparation method thereof
  • Titania nanotube/nanorod microspheres with hierarchical structure and preparation method thereof
  • Titania nanotube/nanorod microspheres with hierarchical structure and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] First, a general method was used to synthesize the precursor of titanium dioxide microspheres under hydrothermal conditions: 5.1 g of tetrabutyl titanate was dropped into 75 mL of absolute ethanol under stirring, and then 0.33 mL of concentrated sulfuric acid (98%) and 0.3 mL were added. Ionized water, put the mixture into an autoclave with a volume of 110 mL with a polytetrafluoroethylene lining, react at 180°C for 4 hours, naturally cool to room temperature, take out, filter, and dry at 40°C for 5 hours before use. The precursor is composed of random nanoparticles with a diameter of 4-6μm; 0.5g of the microsphere precursor is placed in 50mL of 10M sodium hydroxide solution, magnetically stirred for 0.5h, and the mixed solution is placed in a volume of 80mL In an autoclave lined with polytetrafluoroethylene, react at 150°C for 24h, cool to room temperature naturally, take out and filter, wash with deionized water to neutrality, and redisperse the product in 600mL dilute ...

Embodiment 2

[0032] First, a general method was used to synthesize the titanium dioxide microsphere precursor (same as Example 1); 0.5g of the microsphere precursor was put into 50mL of 10M sodium hydroxide solution, magnetically stirred for 0.5h, and the mixed solution was put into In an 80mL autoclave lined with polytetrafluoroethylene, react at 150℃ for 24h, cool to room temperature naturally, take out and filter, wash with deionized water to neutrality, and redisperse the product in 600mL dilute hydrochloric acid with a concentration of 0.1M After stirring for 12 hours at room temperature, washing with deionized water to neutrality, drying at 40°C for 5 hours, and annealing the product at 500°C for 1 hour, titanium dioxide nanorod microspheres with hierarchical structure of anatase phase can be obtained.

[0033] Attached Figure 4 This is the X-ray diffraction pattern of the product obtained in this example. It can be seen from the figure that the product is pure anatase TiO 2 . Attached...

Embodiment 3

[0035] First, a general method was used to synthesize the titanium dioxide microsphere precursor (same as Example 1); 0.5g of the microsphere precursor was put into 50mL of 5M sodium hydroxide solution, magnetically stirred for 0.5h, and the mixture was placed in a volume of In an 80mL autoclave lined with polytetrafluoroethylene, react at 180℃ for 24h, cool to room temperature naturally, take out and filter, wash with deionized water to neutrality, and redisperse the product in 600mL dilute hydrochloric acid with a concentration of 0.1M Stir at room temperature for 12h, wash with deionized water to neutrality, dry at 40℃ for 5h, and annealed the product at 400℃ for 1h.

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Abstract

The invention discloses titania nanotube / nanorod microspheres with a hierarchical structure and a preparation method thereof. The microspheres are porous spheres formed by intertwining titania nanotubes or nanorods, and are obtained by reacting a titania microsphere precursor in alkali solution, dispersing and washing in diluted acid, and annealing at the temperature of between 400 and 500 DEG C.The microspheres have a three-dimensional hierarchical structure and high specific surface area; and the microspheres have higher ultraviolet absorption capability and high catalytic activity under ultraviolet light because of a hierarchical tubular structure.

Description

Technical field [0001] The invention relates to a graded titanium dioxide microsphere, in particular to a graded structure of titanium dioxide nanotube / nanorod microsphere and a preparation method thereof, which can be used in the environmental protection technical field of ultraviolet light degradation of organic pollutants. Background technique [0002] In recent years, environmental pollution has become a serious problem threatening the survival of mankind, and the rapidly developed semiconductor photocatalytic oxidation technology has become an effective method to control environmental problems. Among many semiconductor photocatalytic materials, titanium dioxide has always been the most widely used photocatalyst due to its strong oxidizing ability, non-toxicity, and stable chemical properties. Due to these excellent properties, titanium dioxide has a wide range of applications in many fields such as deodorization, antibacterial, water treatment and air purification. Although...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053B82B3/00B01J21/06
Inventor 张晓阳郑昭科黄柏标秦晓燕
Owner SHANDONG UNIV
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