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Floating type Fe-TiO2/cenosphere photocatalyst and preparation method and application thereof

A technology of fe-tio2 and catalyst, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc. It can solve the problems of resource waste and difficult recycling, and achieve easy recycling , easy to accept light, easy to implement effects

Inactive Publication Date: 2010-10-20
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the TiO involved in the wastewater treatment process 2 Most of them are nano-scale particles, which are difficult to recycle and easily cause waste of resources

Method used

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  • Floating type Fe-TiO2/cenosphere photocatalyst and preparation method and application thereof
  • Floating type Fe-TiO2/cenosphere photocatalyst and preparation method and application thereof
  • Floating type Fe-TiO2/cenosphere photocatalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 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.

[0022] 2) With 34g butyl titanate, 71g absolute ethanol, 9.8g acetylacetone, 0.004g Fe(NO 3 ) 3 Take 1.8g of ultrapure water as raw material, adjust its pH to 5 with concentrated nitric acid, stir for 1 hour to make it fully react, then add 2.5g of polyethylene glycol 20000, heat and stir to fully dissolve it, and obtain yellow transparent doped Impurity Fe 3+ Element TiO 2 Sol;

[0023] 3) to the doped Fe prepared in step 2) 3+ Element TiO 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;

[0024] 4) Secondary loading process: Usi...

Embodiment 2

[0032] 1) Pretreatment of fly ash floating beads: Soak with 10% by weight dilute nitric acid for 10 hours, rinse with a large amount of distilled water until the outflowing water is neutral, and dry it for later use.

[0033] 2) With 34g butyl titanate, 71g absolute ethanol, 9.8g acetylacetone, 0.002g Fe(NO3 ) 3 Take 1.8g of ultrapure water as raw material, adjust its pH to 3.5 with concentrated nitric acid, stir for 1 hour to make it fully react, then add 2g of polyethylene glycol 20000, heat and stir to fully dissolve it, and obtain yellow transparent doped Fe 3+ Element TiO 2 Sol;

[0034] 3) to the Fe-TiO obtained in step 2) 2 Add 5g of pretreated floating bead carrier to the sol, stir to make it evenly mixed, 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, then calcined After cooling to room temperature in air;

[0035] 4) Secondary loading process: Using the samp...

Embodiment 3

[0040] 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.

[0041] 2) With 34g butyl titanate, 71g absolute ethanol, 9.8g acetylacetone, 0.02g Fe(NO 3 ) 3 And 1.8g of ultrapure water as raw material, adjust its pH to 5.5 with concentrated nitric acid, stir for 1 hour to make it fully react, then add 1.7g of polyethylene glycol 20000, heat and stir to fully dissolve it, and obtain yellow transparent doped Impurity Fe 3+ Element TiO 2 Sol;

[0042] 3) to the Fe-TiO obtained 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;

[0043] 4) Secondary loading process: Using the sample obtained in the...

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Abstract

The invention discloses a floating type Fe-TiO2 / cenosphere photocatalyst of which the photo-response range can be expanded to a visible region, and a preparation method and application thereof. The preparation method comprises the following steps of: at room temperature, adding a proper amount of Fe(NO3)3 solution into mixed solution of butyl titanate and anhydrous ethanol to form a Fe<3+>-doped TiO2 sol; then adding coal flying ash cenospheres in to the mixture, and stirring the mixture for loading; soaking the mixture for 24 hours; and filtering, drying and roasting the mixture to obtain the floating type Fe-TiO2 / cenosphere photocatalyst as shown by an electron micrograph, and testing the changes of the photo-response wavelength range of the Fe-TiO2 / cenosphere. Results show that the photo-response range of the photocatalyst is expanded to the visible region relative an undoped TiO2 / cenosphere, which is of great significance for improving the utilization ratio of sunlight; and compared with the TiO2 / cenosphere, the Fe-TiO2 / cenosphere can improve the efficiency of degrading methylene blue in visible light.

Description

technical field [0001] The present invention relates to a kind of photocatalyst, especially a kind of floating type Fe-TiO 2 / bleached pearlescent catalyst and preparation method thereof, the present invention also relates to the photoresponse performance of the photocatalyst in the visible light wavelength range and the degradation performance to methylene blue under visible 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. However, due to its large forbidden band width, the photoresponse range only stays in the ultraviolet region, and this part of energy accounts for less than 4% of sunlight, which limits the industrial application. Modified TiO 2 To ove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/76B01J37/02C02F1/32
Inventor 李琴王冰王炜李影翟建平
Owner NANJING UNIV
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