Method for preparing porous TiO2ceramsite photo catalyst with 3-D nano, structure

A three-dimensional nano, photocatalyst technology, applied in the photocatalytic purification environment and nano field, to achieve excellent photocatalytic reaction activity, avoid secondary pollution, and reduce the loss rate.

Inactive Publication Date: 2007-08-29
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using water as a molding binder, nano-TiO 2 Powder is used as raw material to prepare porous TiO with nanophotocatalytic effect and three-dimensional nanostructure, easy to

Method used

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  • Method for preparing porous TiO2ceramsite photo catalyst with 3-D nano, structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1. With 7-8nm anatase titanium dioxide powder 100g as raw material, add 27g of distilled water (27wt%), after repeated mixing, prepare Φ2-4mm pellets. After drying in the air for 2 hours, dry in an oven at 80°C for several hours to obtain dry pellets. Heat the pellets to 450°C at a heating rate of 5°C / min, and hold for 2 hours; then heat at a heating rate of 10°C / min to 600°C, hold for 6 hours, and cool with the furnace. The used catalyst is activated and regenerated by calcining at 600°C for 2 hours.

[0017] Use DX-1000 (Dandong Fangyuan Instrument Co.LTD.) X-ray diffraction (X-ray diffraction, XRD) instrument to analyze nano-TiO 2 Phase composition and grain size of powder raw materials and fired ceramsite powder; observation of TiO 2 The surface and cross-section of the ceramsite sample; the particle size and morphology of the raw material powder were observed with a type electron transmission electron microscope (TEM); the NOVA-3000 (Quantachrome Corpo...

Embodiment 2

[0018]Example 2. With 7-8nm anatase titanium dioxide powder 100g as raw material, add 26g of distilled water (26wt%), after repeated mixing, prepare Φ2-4mm pellets. After drying in the air for 2 hours, dry in an oven at 80°C for several hours to obtain dry pellets. At a heating rate of 5 °C / min, heat the pellets to 450 °C and hold for 2 hours; then at a heating rate of 10 °C / min, heat to 600 °C, hold for 7 hours, and cool with the furnace. The used catalyst is activated and regenerated by calcining at 600°C for 2 hours.

[0019] The porous TiO 2 The performance evaluation method of the ceramsite photocatalyst is the same as in Example 1. The evaluation results are shown in Table 1.

Embodiment 3

[0020] Example 3. With 7-8nm anatase titanium dioxide powder 100g as raw material, 28g of distilled water (28wt%) was added, and after repeated mixing, pellets of Φ2-4mm were prepared. After drying in the air for 2 hours, dry in an oven at 80°C for several hours to obtain dry pellets. Heat the pellets to 450°C at a heating rate of 5°C / min and hold for 2 hours; then heat at a heating rate of 10°C / min to 600°C and hold for 10 hours, then cool with the furnace. The used catalyst is activated and regenerated by calcining at 600°C for 2 hours.

[0021] The porous TiO 2 The performance evaluation method of the ceramsite photocatalyst is the same as in Example 1. The evaluation results are shown in Table 1.

[0022] Table 1. Porous TiO 2 Performance evaluation results of ceramsite photocatalyst

[0023] evaluation item

Grain

size

(nm)

mesoporous

Rate ①

(%)

total hole

porosity

③ (%)

BET table

area

(m 2 / g)

D...

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Abstract

This invention disclose a sort of manufacturing method of multirole TiO2 haydite photocatalyst with tridimensional nanometer structure and nanometer effect, which was easy to reclaim and renewable duty-cycle operation. It was calcining at 600 degree centigrade for 6 hours, which used 7 - 8nm anatase titanium dioxide as raw material and water as moulding agglomerant. The photocatalyst constitute with 14 - 16nm grain and 74.85% ventage. Among others, nanometer meta- hole occupy 29.41%, average pore size is 20.73nm and major pore distribution is 3 - 16nm.Specific area is 58.43m2/g, capacity is 0.9697g/cm3, with V-class isothermal adsorption type, did not spall soaking in water for 20 days. dissipate rate<5%.;Using this catalyzer on the hospital sewage , for 3 hour light-catalyzed reaction , the sterilization toward colibacillus can reach to 99%, which overpassed then powder catalyzer visibility. The invention which is not only adapts to laboratory, but also for industrialization application, no damage to environment and humanity, it is a sort of method that friendly prepares nanometer construction material towards environment.

Description

technical field [0001] The invention belongs to the field of nanotechnology, and relates to a porous TiO with three-dimensional nanostructure and nanoeffect, easy recovery and recyclable use 2 The preparation method of the ceramsite photocatalyst can be used in the fields of photocatalytic purification of the environment such as organic matter degradation and sewage sterilization. It belongs to nanomaterial manufacturing and application technology. Background technique [0002] Nano-TiO 2 The powder has excellent photocatalytic oxidation performance and is widely used in photocatalytic oxidation environmental purification technology. However, when used in water or liquid phase, there are difficulties in separation, recovery and recycling, which may easily cause secondary pollution of the catalyst to the environment. Nano TiO 2 Powder preparation of porous ceramsite catalyst with excellent photocatalytic effect can realize recovery and recycling, and avoid new pollution s...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J35/10
Inventor 姚亚东尹光福康云清邵伟郭向利廖晓明黄忠兵
Owner SICHUAN UNIV
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