Titanium sponge loading TiO2 photocatalyst and preparation method thereof

A photocatalyst, titanium sponge technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of expensive price and a large amount of organic solvents, and achieve low cost, good adsorption performance, light The effect of strong catalytic ability

Inactive Publication Date: 2010-10-13
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] From the above public literature, we know that many studies use sol-gel method to prepare loaded TiO2 in porous materials such as silica gel, zeolite, molecular sieve, etc. 2 , preparation of supported TiO by sol-gel method 2 The disadvantages are: (1) the raw materials require expensive titanium alkoxide; (2) a large amount of organic solvent is required; (3) the final crystallization requires high-temperature sintering

Method used

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  • Titanium sponge loading TiO2 photocatalyst and preparation method thereof
  • Titanium sponge loading TiO2 photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] First, add 3 kg of hydrochloric acid with a concentration of 1mol / L and 1 kg of titanium sponge with a purity of 96% into an ultrasonic washing machine for 1 hour. After filtering the acid solution, use organic solvent acetone and deionized water respectively Ultrasonic washing for 20 minutes and centrifugal drying, and then drying at 110 ° C for 1 hour, and then dry the titanium sponge with a concentration of 5 mol / L oxidant H 2 o 2 and 10 kg of the mixed solution of 1 mol / L HCl with a weight ratio of 40:3, heated and reacted at 75°C for 1.5 hours, then ultrasonically washed with deionized water until no turbidity appeared, and centrifuged to dry. Dry at 120°C for 0.5 hours; sinter the cleaned sponge titanium at 400°C for 2.5 hours to prepare sponge titanium-supported TiO 2 catalyst of light. The solvent and mother liquor used in the above steps are recovered and recycled.

[0033] The resulting product is titanium sponge loaded TiO 2 , the XRD test shows that the ...

Embodiment 2

[0035] First add 3 kg of hydrochloric acid with a concentration of 0.7 mol / L and 1 kg of titanium sponge with a purity of 96% into an ultrasonic washing machine for 1.5 hours. Ultrasonic washing with water for 15 minutes and centrifugal drying; after washing, the sponge titanium was dried at a temperature of 95-100°C for 1.5 hours; 2 S 2 o 3 And 3 kilograms of inorganic alkali NaOH aqueous solution, reaction temperature 150 ℃ lined polytetrafluoroethylene reactor reaction for 48 hours after the product was washed with deionized water and dried at 110 ℃ to get sponge titanium loaded TiO 2 . The solvent and mother liquor used in the above steps are recovered and recycled.

[0036] The resulting product is titanium sponge loaded TiO 2 , the XRD test shows that the titanium sponge loaded TiO 2 The crystal form is anatase crystal form; the degradation concentration is 15mg / L methylene blue solution under ultraviolet light irradiation, and the color is nearly completely faded i...

Embodiment 3

[0038] First, add 3 kg of hydrochloric acid with a concentration of 1.5 mol / L and 1 kg of titanium sponge with a purity of 96% into an ultrasonic washing machine for 1.5 hours. After filtering off the acid solution, use organic solvent methanol and deionized Ultrasonic washing with water for 25 minutes and centrifugal drying and drying at 105 ° C; 2 o 2 and 4 kg of inorganic alkali KOH aqueous solution, and reacted for 36 hours in an enamel reactor with a reaction temperature of 185 ° C; the reaction product was washed with deionized water and dried at 105 ° C to obtain a sponge titanium-loaded TiO 2 . The solvent and mother liquor used in the above steps are recovered and recycled.

[0039] The resulting product is titanium sponge loaded TiO 2 , the XRD test shows that the titanium sponge loaded TiO 2 The crystal form is anatase crystal form; the degradation concentration is 15mg / L methylene blue solution under ultraviolet light irradiation, and the color is almost comple...

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Abstract

The invention relates to a titanium sponge loading TiO2 photocatalyst and a preparation method thereof. The titanium sponge loading TiO2 photocatalyst is prepared by purifying raw materials and carrying out oxidation reaction under the reaction temperature of 75-250 DEG C and the reaction atmospheric pressure of 2-10 with porous foam metal titanium sponge as a carrier and a titanium source. The photocatalyst has the advantages of large specific surface area, strong adsorbability, higher photocatalytic performance both under UV lights and in the sun, recovery and repeated recycle without photocatalytic activity declining, simple procedure, safe operation, little equipment investment, low production cost, no secondary pollution and the like and is particularly suitable for waste water treatment.

Description

Technical field: [0001] The invention belongs to the technical field of semiconductor photocatalysis and relates to a sponge titanium loaded TiO 2 Photocatalyst and its preparation method. Background technique: [0002] Photocatalytic technology is a new environmental treatment technology. In the degradation of wastewater, it has the advantages of low energy consumption, simple operation, mild reaction conditions, can reduce secondary pollution and can work continuously, and has been increasingly valued by people. Nano-TiO 2 Powder, after more than 30 years of research, has been proven to be an efficient, non-toxic and stable photocatalytic material, which has good photocatalytic activity whether in solution or in gas phase reaction. However, due to the nano-TiO 2 The particles are fine, easy to agglomerate, difficult to settle, and difficult to recycle, which is not conducive to the regeneration and reuse of catalysts, and brings great difficulties to practical applicati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06C02F1/30
Inventor 徐华蕊赵昀云朱归胜
Owner GUILIN UNIV OF ELECTRONIC TECH
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