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Floating type TiO2/floating bead composite photochemical catalyst and preparation method and application thereof

A catalyst, composite light technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low added value of products and low overall economic benefits.

Inactive Publication Date: 2010-06-16
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, fly ash floating beads are mostly used in the construction field, such as for the production of lightweight high-temperature insulation refractory materials, floating bead fillers, floating bead concrete and low-density cement, etc., but the added value of its products is low, and the overall comprehensive utilization The economic benefits are not high, and improving the comprehensive utilization value of fly ash floating beads has become a research hotspot in recent years

Method used

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  • Floating type TiO2/floating bead composite photochemical catalyst and preparation method and application thereof
  • Floating type TiO2/floating bead composite photochemical catalyst and preparation method and application thereof
  • Floating type TiO2/floating bead composite photochemical catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Fly ash bleaching beads pretreatment: Soak with 10% by weight dilute nitric acid for 8 hours, rinse with a large amount of distilled water until the outflowing water is neutral, dry and set aside.

[0020] 2) Using 34g of butyl titanate, 71g of absolute ethanol, 9.8g of acetylacetone and 0.9g of ultrapure water as raw materials, adjust the pH to 5 with concentrated nitric acid, stir for 1 hour to make it fully react, and then add 2.5g of polyethylene glycol Diol 20000, heat and stir to fully dissolve, that is, yellow and transparent TiO 2 Sol;

[0021] 3) to the TiO prepared in step 2) 2 Add 3.4g of pretreated floating bead carrier to the sol, stir to make it evenly mixed, impregnate for 12h, filter off the excess sol, dry the filtered sample, and then place it in a muffle furnace for calcination at 550°C for 2.5h , cooled to room temperature in air after calcination;

[0022] 4) Secondary loading process: Using the sample obtained in the above step 3) as a carrie...

Embodiment 2

[0028] 1) Fly ash bleaching beads pretreatment: Soak with 10% by weight dilute nitric acid for 10 hours, rinse with a large amount of distilled water until the water that flows out is neutral, and dry it for later use.

[0029] 2) Using 34g of butyl titanate, 71g of absolute ethanol, 9.8g of acetylacetone and 1.8g of ultrapure water as raw materials, adjust the pH to 3.5 with concentrated nitric acid, stir for 1 hour to fully react, and then add 2g of polyethylene glycol Alcohol 20000, heating and stirring to fully dissolve it, that is, yellow and transparent TiO 2 Sol;

[0030] 3) to the TiO prepared in step 2) 2 Add 5g of pretreated floating bead carrier to the sol, stir to mix evenly, impregnate for 24 hours, filter off the excess sol, dry the filtered sample, and then place it in a muffle furnace for calcination at 450°C for 2 hours. After cooling to room temperature in air;

[0031] 4) Secondary loading process: Using the sample obtained in the above step 3) as a carri...

Embodiment 3

[0036] 1) Fly ash bleaching beads pretreatment: Soak in 10% dilute nitric acid for 12 hours, rinse with a large amount of distilled water until the outflowing water is neutral, dry and set aside.

[0037]2) Using 34g of butyl titanate, 71g of absolute ethanol, 9.8g of acetylacetone and 2.7g of ultrapure water as raw materials, adjust the pH to 5.5 with concentrated nitric acid, stir for 1 hour to fully react, and then add 1.7g of polyethylene glycol Diol 20000, heating and stirring to fully dissolve, that is, yellow and transparent TiO 2 Sol;

[0038] 3) to the TiO prepared in step 2) 2 Add 6.8g of pretreated floating bead carrier to the sol, stir to make it evenly mixed, impregnate for 36h, filter off the excess sol, dry the filtered sample, and then place it in a muffle furnace for calcination at 600°C for 1.5h , cooled to room temperature in air after calcination;

[0039] 4) Secondary loading process: Using the sample obtained in the above step 3) as a carrier, repeat s...

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Abstract

The invention discloses a floating type TiO2 / floating bead composite photochemical catalyst and preparation method and application thereof. The floating bead in photochemical catalyst is spherical and is taken as carrier, and TiO2 forms a film on the surface of the floating bead. The preparation method includes that mixed solution of tetrabutyl titanate and absolute ethanol is added with an amount of ultrapure water, and stirring is carried out, so as to form TiO2 sol; coal ash floating bead is added into the TiO2 sol, and mixing and stirring are simultaneously carried out; impregnation is carried out for a period of time at room temperature, redundant TiO2 sol is filtered, and drying and calcinating are carried out, thus obtaining the photochemical catalyst. The floating type TiO2 / floating bead composite photochemical catalyst has favourable degradation performance on methylene blue solution under the condition of UV irradiation.

Description

technical field [0001] The present invention relates to a kind of photocatalyst, especially a kind of floating type TiO 2 The composite photocatalyst / floating bead and its preparation method, the present invention also relates to the photocatalytic degradation performance of the photocatalyst on methylene blue under the condition of ultraviolet light irradiation. Background technique [0002] In oxide semiconductors, anatase nano-TiO 2 The photocatalytic activity is the strongest, and it has the advantages of good chemical stability, wear resistance, low cost, and direct use of sunlight. It has been gradually used in environmental fields such as wastewater treatment, water purification, and air purification. In practical applications, due to the nano-TiO 2 Small particles, difficult to separate, containing nano-TiO 2 The particle suspension has to be separated by filtration, centrifugation, copolymerization and sedimentation, and the treatment process is relatively compli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06
Inventor 李琴李影王炜王冰王翠兰翟建平
Owner NANJING UNIV
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